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Home My WebLink About20194019.tiffReport of Geotechnical Investigation December 2016 North Weld Landfill Unit 2 APPENDIX E CHEMICAL LABORATORY TESTING RESULTS 152047 FINAL 1 i C i •II',',, !I WWWI►!MM.' VII 1111! Ti i YYYYYIYLYYY Y I 'nRnl '� nesulitsthrtx.i TotdAccess MI ,TITITT Ylaqt us*: www,test.americainc.com.. U! IIIIIIIIIIIIIIIII esmenca IIIIIIhlllllll 1 HE LEADER IN ENVJ UN ENTAL JEST1N0 ANALYTICAL REPORT TestAmerica Laboratories, Inc. TestAmerica Denver 4955 Yarrow Street Arvada, CO 80002 Tel: (303)736-0100 TestAmerica Job ID: 280-80435-1 Client Project/Site: Swift River Environmental Services, LLC For: Swift River Environmental Services, LLC 26 West Dry Creek Circle Suite 470 Littleton, Colorado 80120 Attn: Mr. Steve Wampler tteur Authorized for release by: 312412016 1:27:29 PM Danielle Harrington, Project Manager II (303)736-0176 danielle.harrington@testamericainc.com Designee for Betsy Sara, Project Manager II (303)736-0189 betsy.sara@testamericainc.com The test results in this report meet all 2003 NELAC and 2009 TM requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Table of Contents Cover Page 1 Table of Contents � Definitions 3 Case Narrative 4 Detection Summary � Method Summary 6 Sample Summary 7 Client Sample Results 8 QC Sample Results �a QC Association 11 Chronicle 12 Certification Summary 15 Chain of Custody 16 Receipt Checklists 18 TestAmerica Denver Page 2 of 19 3/24/2016 Definitions/Glossary Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. u Listed under the "D" column to designate that the result is reported on a dry weight basis %I R Percent Recovery CFL Contains Free Liquid CNF Contains no Free Liquid DER Duplicate error ratio (normalized absolute difference) Dil Fac Dilution Factor DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision level concentration MDA Minimum detectable activity EDL Estimated Detection Limit MDC Minimum detectable concentration M D L Method Detection Limit ML Minimum Level (Dioxin) N C Not Calculated N D Not detected at the reporting limit (or MDL or EDL if shown) PQ.L Practical Q ua ntitation Limit QC Quality Control RER Relative error ratio RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TestAmerica Denver Page 3 of 19 3/24/2016 Case Narrative Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Job ID: 280-80435-1 Laboratory►: TestAmerica Denver Narrative CASE NARRATIVE Client: Swift River Environmental Services, LLC Project: Swift River Environmental Services, LLC Report Number: 280-80435-1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In some cases, due to interference or analytes present at high concentrations, samples were diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. Calculations are performed before rounding to avoid round -off errors in calculated results. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the individual sections below. Sample Receiving The samples were received on 03/04/2016; the samples arrived in good condition, properly preserved and on ice. The temperature of the cooler at receipt was 19.3 C, which is above the recommended maximum temperature of 6.0 C. No ice was present. The sample ID's on the containers matched the ID's on the paper attached to the chain of custody. The samples were logged per the container labels. Sample collection dates and times were not provided. The client was notified on 31712016. Holding Times All holding times were met. Method Blanks All Method Blanks were within established control limits. Sample Duplicate All sample duplicate samples were within established control limits. General Comments The sample analyses were subcontracted to TestAmerica Corpus Christi; 1733 N. Padre Island Drive, Corpus Christi, TX, 78408. TestAmerica Denver Page 4 of 19 3/24/2016 Detection Summary Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Client Sample ID: NINE -4 [14'-"17'] Lab Sample ID: 280-80435-1 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 8.9 0.054 0.054 meq/100gm 1 O 9081 Total/NA Client Sample ID: NWE-8 [14'-18'] Lab Sample ID: 280-80435-2 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 9.9 0.054 0.054 meq/lo0gm 1 9081 Total/NA Client Sample ID: NE -12 [9-14'] Lab Sample ID: 280-80435-3 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 15 0.057 0.057 meq/ 100g m 1 a 9081 Total/NA Client Sample ID: NWE-17 [9-14'] Lab Sample ID: 280-80435-4 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 14 0.057 0.057 meq/ l 0Og m 1 9081 Total/NA Client Sample ID: NWE-4 ['17'-'19'] Lab Sample ID: 280-80435-5 Analyte Cation Exchange Capacity Result Qualifier RL RL Unit Dil Fac D Method Prep Type 11 0.065 0.065 meg/l00gm 9081 Total/NA Client Sample ID: NWE-8 ['19'-24'] Lab Sample ID: 280-80435-6 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 10 0.055 0.055 meq/100gm 1 0 9081 Total/NA Client Sample ID: NWE-12 ['14'-'19'] Lab Sample ID: 280-80435-7 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 10 0.057 0.057 meq/100gm 1 0 9081 Total/NA Client Sample ID: NWE-17 ['16'-'I8'] Lab Sample ID: 280-80435-8 Analyte Result Qualifier RL RL Unit Dil Fac D Method Prep Type Cation Exchange Capacity 12 This Detection Summary does not include radiochemical test results. 0.056 0.056 meq/100gm 1 it 9081 Total/NA TestAmerica Denver Page 5 of 19 3/24/2016 Method Summary Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Method Method Description 9081 Cation Exchange Capacity (C EC ) Moisture Percent Moisture Protocol Laboratory SW846 TAL CC EPA TAL CC Protocol References: EPA = US Environmental Protection Agency SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. Laboratory References: TAL CC = TestAmerica Corpus Christi, 1733 N. Padre Island Drive, Corpus Christi, TX 78408, TEL (361)289-2673 TestAmerica Denver Page 6 of 19 3/24/2016 Sample Summary Client: Swift River Environmental Services, LLC Project/Site: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Lab Sample ID 280-80435-1 280-80435-2 280-80435-3 280-80435-4 280-80435-5 280-80435-7 280-80435-8 Client Sample ID NWE-4 114'-171 NWE-8 [14'-181 NWE-1219-14'] NWE-17 [9-14'] NWE-4 [17'-19] NWE-8 [19'-24] NWE-12 [14'-19'] NWE-17 [16'-181 Matrix Solid Solid Solid Solid Solid Solid Solid Solid Collected 03/04/16 00:00 03/04/16 00:00 03/04/16 00:00 03/04/16 00:00 03/04/16 00:00 03/04/16 00:00 Received 03/04/16 00:00 03/04/16 00:00 03/04/16 09:56 03/04/16 09:56 03/04/16 09:56 03/04/16 09:56 03/04/16 09:56 03/04/16 09:56 03/04/16 09:56 03/04/16 09:56 TestAmerica Denver Page 7 of 19 3/24/2016 client Sample Results Client: Swift River Environmental Services, LLC Project/Site: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 General Chemistry Client Sample ID: NUDE -4 [14'-17] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture ResultQualifier Client Sample ID: NINE -4 [14'-17] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 6.9 Result Qualifier Client Sample ID: NINE -8 [14'-18'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture RL 0.1 RL RL Unit 0.1 % RL Unit Lab Sample ID: 280-80435-1 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-1 Matrix: Solid Percent Solids: 93.1 D Prepared Analyzed Dil Fac 8.9 0.054 0.054 m eq/ 100g m 0 03/22/16 14:00 03/23/16 16:48 1 Result Qualifier Client Sample ID: NINE -8 [14'-18] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 7.7 Result Qualifier Client Sample ID: NINE -12 [9-14'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture RL 0.1 RL RL Unit 0.1 % RL Unit Lab Sample ID: 280-80435-2 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-2 Matrix: Solid Percent Solids: 92.3 D Prepared Analyzed Dil Fac 9.9 0.054 0.054 meq/ 100g m cP 03/22/16 14:00 03/23/16 16:48 1 Result Qualifier Client Sample ID: NWE-12 [9-14'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 12.6 Result Qualifier Client Sample ID: NINE -17 [9-14'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture 15 Result Qualifier Client Sample ID: NINE -17 [9-14'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 12.3 Result Qualifier Client Sample ID: NINE -4 [17'-19] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture 14 Result Qualifier 23.2 RL 0.1 RL RL Unit 0.1 % RL Unit Lab Sample ID: 280-80435-3 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-3 Matrix: Solid Percent Solids: 87.4 D Prepared Analyzed Dil Fac 0.057 0.057 meq/100gm i 03/22/16 14:00 03/23/16 16:48 1 RL 0.1 RL RL Unit 0.1 % RL Unit Lab Sample ID: 280-80435-4 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-4 Matrix: Solid Percent Solids: 87.7 D Prepared Analyzed Dil Fac 0.057 0.057 meq/100gm CP 03/22/16 14:00 03/23/16 16:48 1 RL 0.1 RL Unit 0.1 % Lab Sample ID: 280-80435-5 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 8 TestAmerice Denver Page 8 of 19 3/2412016 Client Sample Results Client: Swift River Environmental Services, LLC Project/Site: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 General Chemistry Client Sample ID: NINE -4 [17'-19] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity Result Qualifier Client Sample ID: NINE -8 [19'-24'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture 11 Result Qualifier Client Sample ID: NINE -8 [19'-24'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 9.1 Result Qualifier Client Sample ID: NINE -12 [14'-19'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture 10 Result Qualifier Client Sample ID: NINE -12 [14'-19'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 11.5 Result Qualifier Client Sample ID: NINE -17 [16'-18'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Percent Moisture 10 Result Qualifier Client Sample ID: NINE -17 [16'-181] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Analyte Cation Exchange Capacity 10.1 Result Qualifier 12 RL RL Unit Lab Sample ID: 280-80435-5 Matrix: Solid Percent Solids: 76.8 D Prepared Analyzed Dil Fac 0.065 0.065 meq/100gm 0 03/2211014:00 03/23/16 16:48 1 RL 0.1 RL RL Unit 0.1 % RL Unit Lab Sample ID: 280-80435-6 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-6 Matrix: Solid Percent Solids: 90.9 D Prepared Analyzed Dil Fac 0.055 0.055 meg/100gm 0 03/22/16 14:00 03/23/16 16:48 1 RL 0.1 RL RL Unit 0.1 % RL Unit Lab Sample ID: 280-80435-7 Matrix: Solid D Prepared Analyzed Dil Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-7 Matrix: Solid Percent Solids: 88.5 D Prepared Analyzed Dil Fac 0.057 0.057 meq/100g m C 03/22/16 14:00 03/23/16 16:48 1 RL 0.1 RL RL Unit 0.1 % RL Unit 0.056 O056 meq/100g m Lab Sample ID: 280-80435-8 Matrix: Solid D Prepared Analyzed DI[ Fac 03/08/16 16:03 1 Lab Sample ID: 280-80435-8 Matrix: Solid Percent Solids: 89.9 D Prepared Analyzed Dil Fac .:- . F 03/22/16 16:14 03/23/16 16:48 1 TestAmerice Denver Page 9 of 19 3/2412016 QC Sample Results Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Method: 9081 - Cation Exchange Capacity (CEC) Lab Sample ID: MB 560-126251/1-A Matrix: Solid Analysis Batch: 126306 Analyte Client Sample ID: Method Blank P rep Type: Total/NA Prep Batch: 126251 MB MB Result Qualifier RL RL Unit D Prepared Analyzed Dil l Fac Cation Exchange Capacity ND Lab Sample ID: 280-80435-1 DU Matrix: Solid Analysis Batch: 126306 Analyte Cation Exchange Capacity Sample Sample Result Qualifier 0.050 0.050 rneq/ 100g m 03/22116 14:00 03123/16 16:48 1 Client Sample ID: NINE -4 [14'-17'l P rep Type: Total/NA Prep Batch: 126251 DU DU RPD Result Qualifier Unit RPD Limit 8.9 8.80 rneq/100gm 1 20 Method: Moisture - Percent Moisture Lab Sample ID: 280-80435-1 DU Matrix: Solid Analysis Batch: 125839 Analyte Percent Moisture Sample Sample Result Qualifier Client Sample ID: NWE-4 [14'-17] P rep Type: Total/NA DU DU Result Qualifier Unit D RPD RPD Limit 6.9 6.0 13 40 TestAmerica Denver Page 10 of 19 3/2412016 QC Association Summary Client: Swift River Environmental Services, LLC Project/Site: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 General Chemistry Analysis Batch: 125839 Lab Sample ID 280-80435-1 280-80435-1 DU 280-80435-2 280-80435-3 280-80435-4 280-80435-5 280-80435-8 Prep Batch: 126251 Lab Sample ID 280-80435-1 280-80485-1 DU 280-80435-2 280-80435-3 280-80435-4 280-80435-5 280-80435-6 280-80435-7 280-80435-8 MB 560-126251/1-A Analysis Batch: 126306 Lab Sample ID 280-80435-1 280-80435-1 DU 280-80435-2 280-80435-3 280-80435-4 280-80435-5 280-80435-6 280-80435-7 280-80435-8 MB 560-126251/1-A Client Sample ID NWE-4 [14'-171 NWE-4 E-4 [14'-17] NW E-8 [14'-18'j NWE-12 [9-141 NWE-17 [9-14'] NWE-4 [17'-19] NWE-8 [19'-241 NWE-12 [14'-19'j NWE-17 [16-18'] Client Sample ID NWE-4 [14'-17'] NWE-4 [14'-17'] NWE-8 [14'-18] NWE-12 [9-141 NW E-17 [9-14'l NWE-4 E-4 [17'-19'j NWE-8 [19'-24] NWE-12 [14'-191 NWE-17 [16'-18'] Method Blank Client Sample ID NWE-4 [14'-17'] NWE-4 [14'-17'] NWE-8 [14'-18] NWE-12 [9-14'] NWE-17 [9-14'] NWE-4 [17'-19'] NWE-8 [19'-24'l NWE-12 [14'-19'] NWE-17 [16'-181 Method Blank Prep Type Total/NA Total/NA Total/N A Total/N A Total/NA Total/NA Total/NA Total/NA Total/NA Prep Type Total/NA Total/N A Total/N A Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Prep Type Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Matrix Solid Solid Solid Solid Solid Solid Solid Solid Solid Matrix Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Matrix Solid Solid Solid Solid Solid Solid Method Moisture Moisture Moisture Moisture Moisture Moisture Moisture Moisture Moisture Method 9081 9081 9081 9081 9081 9081 9081 9081 9081 9081 Prep Batch Prep Batch Method Total/NA Total/NA Total/NA Total/NA Solid Solid Solid Solid 9081 9081 9081 9081 9081 9081 9081 9081 9081 9081 Prep Batch 126251 126251 126251 126251 126251 126251 126251 126251 126251 126251 TestAmerica Denver Page 11 of 19 3/24/2016 Lab Chronicle Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Client Sample ID: NWE-4 [14'-17] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-1 Matrix: Solid Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis Moisture 1 125839 03/08116 16:03 AMR TAL CC Client Sample ID: NWE-4 [14' -IT] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-1 Matrix: Solid Percent Solids: 93.1 Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 9081 Total/NA Analysis 9081 4.0 100 rnL 126251 03/22/16 14:00 EDR TAL CC 1 4.0 100 niL 126306 03/23/16 16:48 EDR TAL CC Client Sample ID: NE -8 £14'-18'1 Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-2 Matrix: Solid Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis Moisture 1 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NWE-8 [14'-18'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-2 Matrix: Solid Percent Solids: 92.3 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 9081 Total/NA Analysis 9081 4.0 100 niL 126251 03/22/16 14:00 EDR TAL CC 1 4.0 100 niL 126306 03/23/16 16:48 EDR TAL CC Client Sample ID: NWE-12 [9-14'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-3 Matrix: Solid Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis Moisture 1 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NWE-12 [9-14*] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-3 Matrix: Solid Percent Solids: 87.4 Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 9081 4.0 100 niL 126251 03/22/16 14:00 EDR TAL CC Total/NA Analysis 9081 1 4.0 100 niL 126306 03/23/16 16:48 EDR TAL CC TestAmerica Denver Page 12 of 19 3/2412916 Lab Chronicle Client: Swift River Environmental Services, LLC Project/Site: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Client Sample ID: NWE-17 £9.14'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-4 Matrix: Solid Batch Batch Prep Type Type Method Total/NA Analysis Moisture Dil Initial Run Factor Amount 1 Final Amount Batch Prepared Number or Analyzed Analyst Lab 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NWE-17 £9-14'] Date Collected: 03/04/16 00:00! Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-4 Matrix: Solid Percent Solids: 87.7 Batch Batch Prep Type Type Method Total/NA Prep 9081 Total/NA Analysis 9081 Dil Initial Run Factor Amount 4.0 1 4.0 Final Batch Amount Number 100 rnL 126251 100 rn L 126306 Prepared or Analyzed Analyst Lab 03/22/16 14:00 EDR 03/23/16 16:48 EDR TAL CC TAL CC Client Sample ID: NWE-4 [17'-10'l Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-5 Matrix: Solid Batch Batch Prep Type Type Method Total/NA Analysis Moisture Dil Initial Run Factor Amount 1 Final Batch Amount Number Prepared or Analyzed Analyst Lab 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NINE -4 £17'-19'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-5 Matrix: Solid Percent Solids: 76.8 Batch Batch Prep Type Type Method Total/NA Total/NA Prep 9081 Analysis 9081 Dil Initial Run Factor Amount 4.0 1 4.0 Final Batch Amount Number 100 niL 126251 100 rnL 126306 Prepared or Analyzed Analyst Lab 03/22/16 14:00 EDR 03/23/16 16:48 EDR TAL CC TAL CC Client Sample ID: NWE-8 [19'-24'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-6 Matrix: Solid Batch Batch Prep Type Type Method Total/NA Analysis Moisture Dil Initial Run Factor Amount 1 Final Batch Amount Number Prepared or Analyzed Analyst Lab 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NWE-8 [19'-24'] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-6 Matrix: Solid Percent Solids: 90.9 Prep Type Total/NA Total/NA Batch Batch Type Method Prep 9081 Analysis 9081 Dil Initial Run Factor Amount 4.0 1 4.0 Final Batch Amount Number 100 n7L 126251 100 n7L 126306 Prepared or Analyzed Analyst Lab 03/22/16 14:00 EDR 03/23/16 16:48 EDR TAL CC TAL CC TestAmerica Denver Page 13 of 19 3/24/2016 Lab Chronicle Client: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-1 Project/Site: Swift River Environmental Services, LLC Client Sample ID: NE -'12 [14'-'19'l Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-7 Matrix: Solid Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis Moisture 1 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NE -'12 ['14'-19'l Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-7 Matrix: Solid Percent Solids: 88.5 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 9081 4.0 100 mL 126251 03/22/16 14:00 EDR TAL CC Total/NA Analysis 9081 1 4.0 100 mL 126306 03/23/16 16:48 EDR TAL CC Client Sample ID: NWE-17 t ['16'-18] Date Collected: 03/04/16 00:00 Date Received: 03/04/16 09:56 Lab Sample ID: 280-80435-8 Matrix: Solid Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis Moisture 1 125839 03/08/16 16:03 AMR TAL CC Client Sample ID: NINE -17 ['16'-'18] Date Collected: 03104/16 00:00 Date Received: 03/04/16 09:56 Lab Sample I D : 280-80435-8 Matrix: Solid Percent Solids: 89.9 Batch Batch DiI Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 9081 4.0 100 niL 126251 03/22/16 16:14 EDR TAL CC Total/NA Analysis 9081 1 4.0 100 rnL 126306 03/23/16 16:48 EDR TAL CC Laboratory References: TAL CC = TestAmerica Corpus Christi, 1733 N. Padre Island Drive, Corpus Christi, TX 78408, TEL (361)289-2673 TestAmerica Denver Page 14 of 19 3/24/2016 Certification Summary Client: Swift River Environmental Services, LLC Project/Site: Swift River Environmental Services, LLC TestAmerica Job ID: 280-80435-'1 Laboratory: TestAmerica Denver All certifications held by this laboratory are listed. Not all certifications are applicable to this report. Authority Program A2LA A2LA Alabama Alaska (UST) Arizona Arkansas DEO California Connecticut Florida Georgia DoD ELAP ISO/IEC 17025 State Program State Program State Program State Program State Program State Program NELAP Illinois Iowa Kansas Louisiana Maine Minnesota Nevada New Hampshire New Jersey New York North Carolina (WW/SW) North Dakota Oklahoma Oregon Pennsylvania South Carolina Texas USDA Utah Virginia Washington West Virginia DEP Wisconsin Wyoming (UST) State Program NELAP State Program NELAP NELAP State Program NELAP State Program NELAP NELAP NELAP State Program State Program State Program NELAP NELAP State Program NELAP Federal NELAP NELAP State Program State Program State Program A2LA EPA Region Certification ID Expiration Date 2907.01 10-31-17 2907.01 10-31-17 4 40730 09-30-12* 10 UST -30 04-05-16 9 AZ0713 12-19-16 6 88-0687 06-01-16 9 2513 08-31-16 1 PH -0686 09-30-16 4 E87667 O6 -3O-16 4 N/A 01-09-17 5 200017 -30-16 7 370 11-30-16 7 E-10166 04-30-16 6 02096 06-30-16 1 CO0002 03-03-17 5 8-999-405 12-31-16 9 OO0026 07-31-16 1 205310 04-28-16 2 CO004 06-30-16 2 11964 04-01-16 4 358 12-31-16 8 R-034 01-09-16 * 6 8614 08-31-16 10 4025 01-09-17 3 68-00664 07-31-16 4 72002001 01-09-16 * 6 1104704183-15-11 09-30-16 P330-13-00202 07-02-16 8 CO00026 07-31-16 3 460232 06-14-16 10 C583 08-03-16 3 354 11-30-16 5 9996154 30 08-31-16 8 2907.01 10-31-17 Laboratory: TestAmerica Corpus Christi All certifications held by this laboratory are listed. Not all certifications are applicable to this report. Authority Program Oklahoma Texas USDA State Program NELAP Federal * Certification renewal pending - certification considered valid. EPA Region 6 6 Certification ID Expiration Date 2015-119 1104704210-15-14 P330-14-00328 08-31-16 03-31-16 09-30-17 TestAmerica Denver Page 15 of 19 3/24/2016 co CD CD 0 CO Chain of Custody Record Temperature an Receipt onlYrirrg Water? Yes I No ❑ TestAmerica THE LEADER IN ENVIRONMENTAL TESTING TeL- 124 (1 007) Client file en 0 Pro act Mans er Date Chain of Custody NUmter 2212 SW I KiNter 3 w4zzo4 : Address Telephone Number (Area Code)/Pax Number Lib Number Vrtj Ci I c4 1 2ib Page of v1/41 -Y r CityL2: ate . /p e Site Contacrt Lab Contact Arnalysis (A#a r list : (a1hvi more space Is needed) eel Name and Lamtate) - PtIksL.L4Mdfi'1t Carter/WaybiYNumber I 144I [Ifst iict/ JJ fs 4/ ContrPurchase Ordeote No. Matrix Containers & are erJ'atf er.7r� V �+ J i Conditions of Receipt Samp/e I. Na and Description QDate ' (Containers for each sample maybe combined an one late rime ` t il' 13 t1/4 A. it1/4114c ltditAircer --IG . :Ai% :trp•feteLet t4 'kg ffilr as , I II i . , Boni 14 vkie--.8, t3N-IS j . . I 4 X •C it I I li Bcritvz; NANJ d zi X x 2 0-804,35 Chain of Custody ?nri,3411i .. X 2( Bantu\ Ni liras a I _ ! - .4 ii. „.... -i! _-. boa kW aii 12 ,...- biz, ae r- I X . Possible Hazard ldentcalron Sample Disposal (A fee may be assessed if samples are retained 'T1 Noo-Haeard ❑ flammetle El $`kili irritant ❑ Poison B ❑ U/7Anom7 IllReturn To Client Disposal By Lab ❑ Archive For Monti s longertitan- I month) Turn Around Time Required ■ 24 Hours ■ 48 Hours _ ypays Comments 14 Days • 27 Days • other GEC Requirements (Specify) °I. IRfl- ?t,L_) 3 i� DISTRIBUTION: WHITE - Returned to Client wrtli Report CANARY Stays with the Sample, PINK - field Copy [cinaloNi ExcHANJGC CaP4cIT¼J SAmPLE,5: (LIAJER M asia bmtecar ni hiv3E_ Fyn. 'Brij N \AIL: ele\a rna9 1 et \ Li if ael i\swEassrivid+ -L suAl 4litinelliManimapinwaSir ORAtf ttcL) ��MPI�SoBGRACC ikAATERA4 (Li eroTAL) Hi: 191 khk\E— iclaar-DLC1 Nkalesies.101 meelq 191 khAYE4eal7-ae Page 17 of 19 3/24/2016 Login Sample Receipt Checklist Client: Swift River Environmental Services, LLC Job Number: 280-80435-1 Login Number: 80435 List Number: '1 Creator: White, Denise E Question Answer Comment List Source: TestAmerica Denver Radioactivity either was not measured or, if measured, is at or below N/A background The cooler's custody seal, if present, is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. False No: Thermal preservation not required Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? False NA: Not requested on COC There are no discrepancies between the sample IDs on the containers and False No: IDs on containers do not match the COC. the COC. Logged in per CONTAINERS. Samples are received within Holding Time (Excluding tests with immediate True HTs).. Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection dateltimes are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified True There is sufficient vol. for all requested analyses, incl. any requested True M SIMSDs VOA sample vials do not have headspace or bubble is <6mm (1/4") in N/A diameter. If necessary, staff have been informed of any short hold time or quick TAT True needs Multiphasic samples are not present. True Samples do not require splitting or compositing. True Sampling Company provided. True Samples received within 48 hours of sampling. True Samples requiring field filtration have been filtered in the field. True Chlorine Residual checked. NIA TestAmerica Denver Page 18 of 19 812412016 Login Sample Receipt Checklist Client: Swift River Environmental Services, LLC Job Number: 280-80435-1 Login Number: 80435 List Number: 2 Creator: Adams, Christi L Question ListSource: TestAmerica Corpus Christi List Creation: 03/08/16 01:05 PM Answer Comment Radioactivity wasn't checked or is </- background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is N/A <amm m (1/4"). Multiphasic lti phasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A TestAmerica Denver Page 19 of 19 3/2412916 lilIlIIllflllllllpl111 iestAmen IIUilltplamuiglil ilpgltpnIf4 anit4 THE! LEAL)EIZ IN EN-VIIRO)IMEW1A1. `il�= ill lfr cc: Mr. Eric DiEsposti Ilumb 1 1 1 1 1 1 pfl I I I I1I I lhI It111 I I Ill Clip I tllllln ANALYTICAL REPORT Job Number: 280-81693-1 Job Description: 688 North Weld For: Waste Management 2400 West Union Avenue Englewood, CO 80110 Attention: Mr. Tom Schweitzer Betsy A Sara, Project Manager II 4955 Yarrow Street, Arvada, CO, 80002 (303)736-0180 betsy.sara@testamericainc.com a+testamericainc.com 04/2612016 Approved for release. Betsy A Sara Project Manager II 4/25/2016 11:16 AM The test results in this report relate only to the samples in this report and meet all requirements of NELAC, with any exceptions noted. Pursuant to NELAP, this report shall not be reproduced except in full, without the written approval of the laboratory. All questions regarding this report should be directed to the TestAmerica Denver Project Manager. The Lab Certification I D# is 4025. Reporting limits are adjusted for sample size used, dilutions and moisture content if applicable. TestAmerica Laboratories, Inc. TestAmerica Denver 4955 Yarrow Street, Arvada, CO 80002 Tel (303) 736-0100 Fax (303) 431-7171 www.testamericainc.com Page 1 of 38 16 Table of Contents Cover Title Page 1 Report Narrative 3 Executive Summary 4 Method Summary 5 Method I Analyst Summary 6 S ample Summary 7 S ample Results 8 S ample Datasheets 9 Data Qualifiers 19 QC Results 20 Qc Association Summary 21 Qc Reports 24 Laboratory Chronicle 32 Client Chain of Custody 35 S ample Receipt Checklist 37 Page 2 of 38 04/25/2016 CASE NARRATIVE Client: Waste Management Project: 588INorth Weld Report Number: 280-81693-1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In some cases, due to interference or analytes present at high concentrations, samples were diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. This report may include reporting limits (RLs) less than TestAmerica's standard reporting limit. The reported sample results and associated reporting limits are being used specifically to meet the needs of this project. Note that data are not normally reported to these levels without qualification because they are inherently less reliable and potentially less defensible than required by the latest industry standards. Sample Receiving The samples were received on 04/07/2016; the samples arrived in good condition. These samples arrived at a temperature of 18.4 C which is above the recommended maximum temperature of 6.0 C. No ice was present. The laboratory proceeded with the requested analyses. The client was notified on 4/712016. Holding Times All holding times were within established control limits. Method Blanks All Method Blank samples were within established control limits. Laboratory Control Samples All Laboratory Control Samples were within established control limits. Matrix Spike (MS) and Matrix Spike Duplicate (MSD) All MS and MSD samples were within established control limits. General Comments The analysis for Cation Exchange was performed at TestAmerica's Corpus Christi facility. TestAmerica Corpus Christi 1733 N. Padre Island Drive Corpus Christi, TX 78408 Phone: (361) 289-2673 Page 3 of 38 04/25/2016 EXECUTIVE SUMMARY - Detections Client: Waste Management Lab Sample ID Client Sample ID Analyte Reporting Result Qualifier Limit Units Job Number: 280-81693-1 Method 280-81693-1 PIT 1 2-4 Cation Exchange Capacity Percent Moisture 280-81693-2 PIT 2 5-9 Cation Exchange Capacity Percent Moisture 280-81693-3 PIT 3 3-5 Percent Moisture Soluble pH adj. to 25 deg C -Soluble Specific Conductance -Soluble 280-81693-4 PIT 4 2-6 Percent Moisture Soluble pH adj. to 25 deg C -Soluble Specific Conductance -Soluble 280-81693-5 PIT 4 6-12 Percent Moisture Soluble Sodium Adsorption Ratio pH adj. to 25 deg C -Soluble Specific Conductance -Soluble 280-81693-6 PIT 5 6-10 Percent Moisture Soluble Sodium Adsorption Ratio pH adj. to 25 deg C -Soluble Specific Conductance -Soluble 17 13.6 15 12.5 8.9 9.08 390 8.3 9.08 330 11.3 2.5 9.09 400 11.5 4.2 9.30 550 H H H H 0.058 0.1 0.057 0.1 0.1 0.100 20 0.1 0.100 20 0.1 1.2 0.100 20 0.1 1.2 0.100 20 meq/100gm meq/100gm �1a 9081 Moisture 9081 Moisture Moisture SU 9045C umhos/cm 9050A Moisture SU 9045C umhos/cm 9050A No Unit SU umhos/cm ° o No Unit SU umhos/cm Moisture 20B 9045C 9050A Moisture 20B 9045C 9050A TestAmerica Denver Page 4 of 38 04125/2016 METHOD SUMMARY Client: Waste Management Description Lab Location Method Job Number: 280-81693-1 Preparation Method Matrix: Solid Sodium Adsorption Ratio Preparation, Sodium Absorption Ratio pH Deionized Water Leaching Procedure Specific Conductance Deionized Water Leaching Procedure Organic Carbon, Total (TOC) Percent Moisture Cation Exchange Capacity (CEC) Cation Exchange Capacity (CEC) Lab References: TAL CC = TestAmerica Corpus Christi TAL DEN = TestAmerica Denver Method References: ASTM = ASTM International EPA = US Environmental Protection Agency TAL DEN TAL DEN TAL DEN TAL DEN TAL DEN TAL DEN TAL DEN TAL DEN TAL CC TAL CC USDA 20B SW846 9045C SW846 9050A SW846 9060A EPA Moisture SW846 9081 USDA 20B ASTM DI Leach ASTM DI Leach SW846 9081 SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods",Third Edition, November 1986 And Its Updates. USDA = "USDA Agriculture Handbook 60, section 20B". TestArerica Denver Page 5 of 38 04125/2016 METHOD / ANALYST SUMMARY Client: Waste Management Method USDA 20B SW846 9045C SW846 9050A SW846 9060A SW846 9081 EPA Moisture Analyst Rhoades, Chris R Uge, kern E Martinez, Rut S Cherry, Scott V Mathewson, John E Lawrence, Caitlyn M Job Number: 280-81693-1 Analyst ID CRR IEU RSM SVC JEM CML TestAmerica Denver Page 6 of 38 04/25/2016 SAMPLE SUMMARY Client: Waste Management Lab Sample ID Client Sample ID Client Matrix Job Number: 280-81693-1 Date/Ti me Sampled D ate/Tim.e Received 280-81693-1 280-81693-2 280-81693-3 280-81693-4 280-81693-5 280-81693-6 PIT 1 2-4 PIT 2 5-9 PIT 3 3-5 PIT 4 2-6 PIT 4 6-12 PIT 56-10 Solid Solid Solid Solid Solid Solid 03/22/2016 1150 03/22/2016 1210 03/22/2016 1230 03/22/2016 1250 03122/2016 1255 03/22/2016 1310 04107/201 1133 04/07/2016 1133 04/07/2016 1133 04/07/2016 1133 04/07/2016 1133 04/07/2016 1133 TestAmerica Denver Page 7 of 38 04/25/2016 SAMPLE RESULTS TestAmerica Denver Page 8 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analysis Method: Prep Method: Dilution: Analysis Date: Prep Date: PIT 33115 280-81693-3 Solid 20B 20B 10 04/21/2016 1001 04/14/2016 1806 Analyte Sodium Adsorption Ratio 20B Sodium Adsorption Ratio -Soluble DryWt Corrected: N Analysis Batch: 280-321949 Prep Batch: 280-320884 Job Number: 280-81693-1 Date Sampled: 03/22/2016 1230 Date Received: 04107/2016 1133 Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: MT_025 N/A 100 g 50 mL Result (No Unit) Qualifier RL ND 1.2 TestAmerica Denver Page 9 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analysis Method: Prep Method: Dilution: Analysis Date: Prep Date: PIT 4 24 280-81693-4 Solid 20B 20B 10 04/21/2016 1009 04/14/2016 1806 Analyte Sodium Adsorption Ratio 20B Sodium Adsorption Ratio -Soluble DryWt Corrected: N Analysis Batch: 280-321949 Prep Batch: 280-320884 Job Number: 280-81693-1 Date Sampled: 03122/20161280 Date Received: 04107/2016 1133 Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: MT_025 N/A 100 g 50 mL Result (No Unit) Qualifier RL ND 1.2 TestAmerica Denver Page 10 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analysis Method: Prep Method: Dilution: Analysis Date: Prep Date: PIT 4 6412 280-81693-5 Solid 20B 20B 10 04/21/2016 1012 04/14/2016 1806 Analyte Sodium Adsorption Ratio 20B Sodium Adsorption Ratio -Soluble DryWt Corrected: N Analysis Batch: 280-321949 Prep Batch: 280-320884 Job Number: 280-81693-1 Date Sampled: 03122/20161286 Date Received: 04107/2016 1133 Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: MT_025 N/A 100 g 50 mL Result (No Unit) Qualifier RL 2.5 1.2 TestAmerica Denver Page 11 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analysis Method: Prep Method: Dilution: Analysis Date: Prep Date: PIT 5 6-10 280-81693-6 Solid 20B 20B 10 04/21/2016 1015 04/14/2016 1806 Analyte Sodium Adsorption Ratio 20B Sodium Adsorption Ratio -Soluble DryWt Corrected: N Analysis Batch: 280-321949 Prep Batch: 280-320884 Job Number: 280-81693-1 Date Sampled: 03/22/2016 1310 Date Received: 04107/2016 1 133 Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: MT_025 N/A 100 g 50 mL Result (No Unit) Qualifier RL 4.2 1.2 TestAmerica Denver Page 12 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analyte Cation Exchange Percent Moisture PIT 1 2-4 280-81693-1 Solid Result Capacity 17 Analysis Batch: 560-127300 Prep Batch: 560-127298 13.6 Analysis Batch: 280-320252 General Chemistry % Moisture: 13.6 Qual Units meq/100gm Analysis Date: 04/25/2016 1032 Prep Date: 04/22/2016 1028 % Analysis Date: 04/11/2016 1717 RL 0.058 Job Number: 280-81693-1 Date Sampled: 03/22/2016 1150 Date Received: 0410712016 1133 Dil Method 1.0 9081 DryWt Corrected: Yr 0.1 1.0 Moisture DryWt Corrected: N TestAmerica Denver Page 13 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analyte Cation Exchange Percent Moisture PIT 2 5-9 280-81693-2 Solid Result Capacity 15 Analysis Batch: 560-127300 Prep Batch: 560-127298 12.5 Analysis Batch: 280-320252 General Chemistry % Moisture: 12.5 Qual Units meq/100gm Analysis Date: 04/25/2016 1032 Prep Date: 04/22/2016 1028 % Analysis Date: 04/11/2016 1717 RL 0.057 Job Number: 260-81693-1 Date Sampled: 03122/20161210 Date Received: 04107/2016 1133 Dil Method 1.0 9081 DryWt Corrected: Yr 0.1 1.0 Moisture DryWt Corrected: N TestAmerica Denver Page 14 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analyte PIT 3 34 280-81693-3 Solid Result General Chemistry Qual Units RL Job Number: 280-81693-1 Date Sampled: 03/22/2016 1230 Date Received: 04107/2016 1133 Total Organic Carbon ND Analysis Batch: 280-320916 Analyte pH adj. to 25 deg C -Soluble Analysis Batch: Specific Conductance -Soluble Analysis Batch: Percent Moisture Analysis Batch: Result 9.08 280-321210 390 280-321966 8.9 280-320252 g/Kg Analysis Date: 04/14/2016 2043 Qual Units H SU 4.0 RL Di! Method 1.0 9060A DryWt Corrected: N Dil Method Analysis Date: 04/18/2016 0824 umhoslcm Analysis Date: 04/19/2016 2141 Analysis Date: 04/11/2016 1717 0.100 20 0.1 1.0 9045C DryWt Corrected: N 1.8 9050A DryWt Corrected: N 1.0 Moisture DryWt Corrected: N TestAmerica Denver Page 15 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: PIT 4 24 280-81693-4 Solid General Chemistry Analyte Result Qual Units Total Organic Carbon ND g/Kg Analysis Batch: 280-320916 Analysis Date: 04/14/2016 2052 Analyte pH adj. to 25 deg C -Soluble Analysis Batch: Specific Conductance -Soluble Analysis Batch: Percent Moisture Analysis Batch: Result 9.08 280-321210 330 280-321966 8.3 280-320252 Job Number: 260► -81693-1 Date Sampled: 03122/20161250 Date Received: 04107/2016 1133 RL Qual Units H SU Analysis Date: 04/18/2016 0824 umhos/cm Analysis Date: 04/19/2016 2141 4.0 Analysis Date: 04/11/2016 1717 RL 0.100 20 0.1 Di! Method 1.0 9060A DryWt Corrected: N Dil Method 1.0 9045C DryWt Corrected: N 1.0 9050A DryWt Corrected: N 1.0 Moisture DryWt Corrected: N TestAmerica Denver Page 16 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: PIT 4 6412 280-81693-5 Solid Analyte Result Total Organic Carbon ND Analysis Batch: 280-320916 Analyte pH adj. to 25 deg C -Soluble Analysis Batch: Specific Conductance -Soluble Analysis Batch: Percent Moisture Analysis Batch: General Chemistry Qual Units RL Job Number: 280-81693-1 Date Sampled: 03/22/2016 1255 Date Received: 04107/2016 1133 Result 9.09 280-321210 400 280-321966 11.3 280-320252 g/Kg Analysis Date: 04/14/2016 2054 Qual Units H SU Analysis Date: 04/18/2016 0824 umhos/cm Analysis Date: 04/19/2016 2141 Analysis Date: 04/11/2016 1717 4.0 RL 0.100 20 0.1 Di! Method 1.0 9060A DryWt Corrected: N Dil Method 1.0 9045C DryWt Corrected: N 1.0 9050A DryWt Corrected: N 1.0 Moisture DryWt Corrected: N TestAmerica Denver Page 17 of 38 04/25/2016 Analytical Data Client: Waste Management Client Sample ID: Lab Sample ID: Client Matrix: Analyte PIT 5 6410 280-81693-6 Solid Result General Chemistry Qual Units RL Job Number: 280-81693-1 Date Sampled: 03/22/2016 1310 Date Received: 04107/2016 1133 Total Organic Carbon ND Analysis Batch: 280-320916 Analyte pH adj. to 25 deg C -Soluble Analysis Batch: Specific Conductance -Soluble Analysis Batch: Percent Moisture Analysis Batch: Result 9.30 280-321210 550 280-321966 11.5 280-320252 g/Kg Analysis Date: 04/14/2016 2056 Qual Units H SU 4.0 RL Di! Method 1.0 9060A DryWt Corrected: N Dil Method Analysis Date: 04/18/2016 0824 umhoslcm Analysis Date: 04/19/2016 2141 Analysis Date: 04/11/2016 1717 0.100 20 0.1 1.0 9045C DryWt Corrected: N 1.0 9050A DryWt Corrected: N 1.0 Moisture DryWt Corrected: N TestAmerica Denver Page 18 of 38 04/25/2016 DATA REPORTING QUALIFIERS Client: Waste Management Job Number: 280-81693-1 Lab Section Qualifier Description General Chemistry H Sample was prepped or analyzed beyond the specified holding time TestAmerica Denver Page 19 of 38 04125/2016 QUALITY CONTROL RESULTS TestAmerica Denver Page 20 of 38 04/25/2016 Quality Control Results Client: Waste Management QC Association Summary Lab Sample ID Client Sample ID Job Number: 280-81693-1 Report Basis Client Matrix Method Prep Batch Metals Prep Batch: 280-320884 MB 280-320884/1-A 280-81693-3 280-81893-3DU 280-81693-4 280-81693-5 280-81693-6 Analysis Batch:280-321949 MB 280-320884/1-A 280-81693-3 280-81693-3DU 280-81693-4 280-81693-5 280-81893-£ Report Basis S = Soluble TestAmerica Denver Method Blank P IT 33-5 Duplicate P IT 4 2-6 P IT 4 6-12 P IT 56-10 Method Blank P IT 33-5 Duplicate P IT 4 2-6 P IT 4 6-12 P IT 56-10 S S S S S S S S S S S S Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid 20B 20B 20B 20B 20B 20B 20B 20B 20B 20B 20B 20B 280-320884 280-320884 280-320884 280-320884 280-320884 280-320884 Page 21 of 38 04125/2016 Quality Control Results Client: Waste Management QC Association Summary Lab Sample ID Client Sample ID Job Number: 280-81693-1 Report Basis Client Matrix Method Prep Batch General Chemistry Prep Batch: 560-127298 MB 560-127298/1-A 280-81693-1 280-81693-2 Method Blank P IT 1 2-4 P IT 2 5-9 Analysis Batch:560-127300 MB 560-127298/1-A Method Blank 280-81693-1 PIT 1 2-4 280-81693-2 PIT 2 5-9 Analysis Batch:280-320252 280-81658-A-2 DU 280-81693-1 280-81693-2 280-81693-3 280-81693-4 280-81693-5 280-81693-6 Analysis Batch:280-320916 LCS 280-320916/3 MB 280-320916/4 280-81693-3 280-81693-3MS 280-81693-3MSD 280-81693-4 280-81693-5 280-81693-6 Prep Batch: 280-321059 LCS 280-321059/1-A 280-81693-3 280-81693-4 280-81693-5 280-81693-6 280-81693-6DU Analysis Batch:280-321210 LCS 280-321059/1-A 280-81693-3 280-81693-4 280-81693-5 280-81693-6 280-81693-6DU TestAmerica Denver Duplicate P IT 1 2-4 P IT 2 5-9 P IT 33-5 P IT 4 2-6 P IT 4 6-12 P IT 56-10 Lab Control Sample Method Blank P IT 3 3-5 Matrix Spike Matrix Spike Duplicate P IT 4 2-6 P IT 4 6-12 P IT 56-10 Lab Control Sample P IT 33-5 P IT 4 2-6 P IT 4 6-12 P IT 56-10 Duplicate Lab Control Sample P IT 3 3-5 P IT 4 2-6 P IT 4 6-12 P IT 56-10 Duplicate T T T T T T T T T T T T T T T T T T T T T S S S S S S S S S S S S Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid 9081 9081 9081 9081 9081 9081 Moisture Moisture Moisture Moisture Moisture Moisture Moisture 9060A 9060A 9060A 9060A 9060A 9060A 9060A 9060A DI Leach DI Leach DI Leach DI Leach DI Leach DI Leach 9045C 9045C 9045C 9045C 9045C 9045C 560-127298 560-127298 560-127298 Page 22 of 38 04125/2016 Quality Control Results Client: Waste Management QC Association Summary Lab Sample ID Client Sample ID Job Number: 280-81693-1 Report Basis Client Matrix Method Prep Batch General Chemistry Prep Batch: 280-321338 LCS 280-321338/1-A 280-81693-3 280-81693-4 280-81693-5 280-81693-6 280-81 693-GDU Analysis Batch:280-321492 LCS 280-321338/1-A 280-81693-3 280-81693-4 280-81693-5 280-81693-6 280-81693-6DU Analysis Batch:280-321966 LCS 280-321968/3-A MB 280-321968/4-A 280-81693-3 280-81693-3DU 280-81693-4 280-81693-5 280-81693-6 Prep Batch: 280-321968 LCS 280-321968/3-A MB 280-321968/4-A 280-81693-3 280-81693-3DU 280-81693-4 280-81693-5 280-81693-6 Report Basis S = Soluble T = Total TestAmerica Denver Lab Control Sample P IT 3 3-5 PIT 4 2-6 P IT 4 6-12 P IT 56-10 Duplicate Lab Control Sample P IT 33-5 P IT 4 2-6 P IT 4 6-12 P IT 56-10 Duplicate Lab Control Sample Method Blank P IT 3 3-5 Duplicate P IT 4 2-6 P IT 4 6-12 P IT 56-10 Lab Control Sample Method Blank P IT 3 3-5 Duplicate P IT 4 2-6 P IT 4 6-12 P IT 56-10 S S S S S S S S S S S S S S S S S S S S S S S S S S Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid Solid D I Leach DI Leach DI Leach DI Leach DI Leach DI Leach 9045C 9045C 9045C 9045C 9045C 9045C 9050A► 9050A 9050A 9050A► 9050A 9050A 9050A DI Leach DI Leach DI Leach DI Leach DI Leach DI Leach DI Leach Page 23 of 38 04125/2016 Quality Control Results Client: Waste Management Method Blank - Batch: 280-320884 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte MB 280-320884/1-A Solid 10 04/2112016 0958 04/14/2016 1806 N/A Analysis Batch: Prep Batch: Leach Batch: Units: 280-321949 280-320884 N/A No Unit Result Job Number: 280-81693-1 Method: 20B Preparation: 20B Soluble Qual Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: 11T_025 N/A 100 g 50 mL RL Sodium Adsorption Ratio Duplicate - Batch: 280-320884 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte 280-81693-3 Solid 10 04/21/2016 1006 04/14/2016 1806 N/A ND Analysis Batch: Prep Batch: Leach Batch: Units: 280-321949 280-320884 N/A No Unit Sample Result/Qual Result Method: 20B Preparation: 20B Soluble Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: Sodium Adsorption Ratio ND ND 1.2 MT_025 N/A 100 g 50 mL RPD Limit NC 20 Qual TestAmerica Denver Page 24 of 38 04/25/2016 Quality Control Results Client: Waste Management Duplicate - Batch: 280-321210 Lab Sample ID: Client Matrix: Dilution: Analy►sis Date: Prep Date: Leach Date: Anal y►te 280-81693-6 Solid 1.0 04/18/2016 0824 N/A 04/15/2016 1536 Analysis Batch: Prep Batch: Leach Batch: Units: 280-321210 N/A 280-321059 SU Sample ResultWQual Result Job Number: 280-81693-1 Method: 9045C Preparation: NIA Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: pH adj. to 25 deg C -Soluble 9.30 9.300 RED 0 No Equipment Assigned N/A 1 rnL 1 mL Limit Qual 5 TestAmerica Denver Page 25 of 38 04/25/2016 Quality Control Results Client: Waste Management Duplicate - Batch: 280-321492 Lab Sample ID: Client Matrix: Dilution: Analy►sis Date: Prep Date: Leach Date: Analyte l y►te 280-81693-6 Solid 1.0 04/19/2016 1156 N/A 04/18/2016 1524 Analysis Batch: Prep Batch: Leach Batch: Units: 280-321492 N/A 280-321338 SU Sample ResultWQual Result Job Number: 280-81693-1 Method: 9045C Preparation: NIA Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: pH adj. to 25 deg C -Soluble 9.25 9.230 RED 0.2 No Equipment Assigned N/A rnL mL Limit Qual 5 TestAmerica Denver Page 26 of 38 04/25/2016 Quality Control Results Client: Waste Management Method Blank - Batch: 280-321966 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: MB 280-321968/4-A Solid 1.0 04/19/2016 2141 N/A 04/19/2016 2104 Analyte Specific Conductance -Soluble Analysis Batch: Prep Batch: Leach Batch: Units: 280-321966 N/A 280-321968 umhos/cm Result Qual Job Number: 280-81693-1 Method: 9050A Preparation: N/A Instrument ID: No Equipment Assigned Lab File ID: N/A Initial Weight/Volume: Final Weight/Volume: 25 mL ILL Lab Control Sample - Batch: 280-321966 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte LCS 280-321968/3-A Solid 1.0 04/19/2016 2141 N/A 04/19/2016 2104 ND Analysis Batch: 280-321966 Prep Batch: N/A Leach Batch: 280-321968 Units: umhos/cm Spike Amount Result Specific Conductance -Soluble Duplicate - Batch: 280-321966 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte 280-81693-3 Solid 1.0 04/19/2016 2141 N/A. 04/19/2016 2104 14100 13800 Analysis Batch: Prep Batch: Leach Batch: Units: 280-321966 N/A 280-321968 umhosfcm Sample Result/Qual Method: 9050A Preparation: NIA Instrument ID: Lab File ID: N/A Initial Weight/Volume: Final Weight/Volume: 25 mL % Rec. 98 Result Limit 20 No Equipment Assigned Qual 90-110 Method: 9050A Preparation: N/A instrument ID: No Equipment Assigned Lab File ID: N/A Initial Weight/Volume: Final Weight/Volume: 25 mL RPD Specific Conductance -Soluble 370 362 1 Limit 20 Qual TestAmerica Denver Page 27 of 38 04/25/2016 Quality Control Results Client: Waste Management Method Blank - Batch: 280-320916 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: MB 280-320916/4 Solid 1.0 04/14/2016 2041 N/A N/A Analyte Total Organic Carbon Analysis Batch: Prep Batch: Leach Batch: Units: 280-320916 N/A N/A g/Kg Result Qual Job Number: 280-81693-1 Method: 9060A Preparation: N/A Instrument I D : Lab File ID: Initial Weight/Volume: Final Weight/Volume: WC_Leco 041416.csv RL Lab Control Sample - Batch: 280-320916 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: LCS 280-320916/3 Solid 1.0 04/14/2016 2039 N/A N/A Analyte Total Organic Carbon Matrix Spike/ Matrix Spike Duplicate Recovery Report - Batch: 280-320916 ND Analysis Batch: Prep Batch: Leach Batch: Units: 280-320916 N/A N/A g/Kg MS Lab Sample ID: 280-81693-3 Client Matrix: Dilution:. Analysis Date: Prep Date: Leach Date: Solid 1.0 04/14/2016 2047 N/A N/A Spike Amount 123 Result 98.8 Analysis Batch: 280-320916 Prep Batch: N/A Leach Batch: N/A Method: 9060A Preparation: N/A Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: 4.0 WC_Leco 041416.csv % Rec. Limit 81 46-130 Method: 9060A Preparation: N/A Instrument I D : Lab File ID: Initial Weight/Volume: Final Weight/Volume: Qual WC_Leco 041416.csv MSD Lab Sample ID: 280-81693-3 Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte Solid 1.0 04/14/2016 2050 N/A N/A Analysis Batch: 280-320916 Prep Batch: N/A Leach Batch: N/A % Rec. MS MSD Limit Instrument ID: Lab File ID: Initial Weight/Volume: Final Weight/Volume: WC_Leco 041416.csv RPD RPD Limit MS Qual MSD Qual Total Organic Carbon 102 101 46-130 1 20 TestAmerica Denver Page 28 of 38 04125/2016 Quality Control Results Client: Waste Management Matrix Spike! Matrix Spike Duplicate Recovery Report - Batch: 280-320916 MS Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte 280-81693-3 Solid 1.0 04/14/2016 2047 N/A N/A Units: g/Kg Sample Result/Quel Total Organic Carbon ND Job Number: 280-81693-1 Method: 9060A Preparation: N/A MSD Lab Sample ID: 280-81693-3 Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Solid 1.0 04/14/2016 2050 N/A N/A MS Spike MSD Spike MS Amount Amount Res u It/Qua l 120 120 122 MSD Result/Qual 121 TestAmerioa Denver Page 29 of 38 04/25/2016 Quality Control Results Client: Waste Management Method Blank - Batch: 560-127298 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: MB 560-127298/1-A Solid 1.0 04/25/2016 1032 04/22/2016 1028 N/A Analyte Cation Exchange Capacity Analysis Batch: Prep Batch: Leach Batch: Units: 560-127300 560-127298 N/A meq/100gm Result Qual Job Number: 280-81693-1 Method: 9081 Preparation: 9081 Instrument I D : Lab File ID: Initial Weight/Volume: Final Weight/Volume: No Equipment Assigned N/A 4 g 100 mL ND RL 0.050 TestAmerica Denver Page 30 of 38 04/25/2016 Quality Control Results Client: Waste Management Duplicate - Batch: 280-320252 Lab Sample ID: Client Matrix: Dilution: Analysis Date: Prep Date: Leach Date: Analyte 280-81658-A-2 DU Solid 1.0 04/11/2016 1717 N/A N/A Analysis Batch: Prep Batch: Leach Batch: Units: 280-320252 N/A N/A Sample Result/Qual Result Job Number: 280-81693-1 Method: Moisture Preparation: N/A Instrument ID: Na Equipment Assigned Lab File ID: N/A Initial Weight/Volume: Final Weight/Volume: RPD Limit Qual Percent Moisture 13.6 11.2 20 20 TestAmerica Denver Page 31 of 38 04/25/2016 Quality Control Results Client: Waste Management Laboratory Chronicle Lab ID: 280-81693-1 Method Bottle ID Job Number: 280-81693-1 Client ID: PIT 1 2-4 Sample Date/Time: 03/22/2016 11:50 Received Date/Time: 04/07/2016 11:33 Analysis Run Batch Date Prepared / Prep Batch Analyzed Dil Lab Analyst P:9081 280 -81693 -A -1-A► A:9081 280 -81693 -A -1-A 560-127300 560-127298 04/22/2016 10:28 1 TAL CC JEM 560-127300 560-127298 04/25/2016 10:32 1 TAL CC JEM A:Moisture 280-81693-B-1 280-320252 04/11/2016 17:17 1 TAL DEN CML Lab ID: 280-81693-2 Client ID: PIT 2 5-9 Sample Date/Time: 03/22/2016 12:10 Received Date/Time: 04/07/2016 11:33 Analysis Date Prepared / Method Bottle ID P:9081 280 -81693 -A -2-A A:9081 280 -81693 -A -2-A Run Batch Prep Batch Analyzed Dil Lab Analyst 560-127300 560-127298 04/22/2016 10:28 1 TAL CC JEM 560-127300 560-127298 04/25/2016 10:32 1 TAL CC JEM A:Moisture 280-81693-B-2 280-320252 04/11/2016 17:17 1 TAL DEN CML Lab ID: 280-81693-3 Client ID: PIT 3 3-5 Sample Date/Time: 03/22/2016 12:30 Received Date/Time: 04107/2016 11:33 Analysis Date Prepared I Method Bottle ID Run Batch Prep Batch Analyzed Dil Lab Analyst P:20B 280 -81693 -A -3-A A:20B 280 -81693 -A -3-A► 280-321949 280-320884 04/14/2016 18:06 10 TAL DEN SEJ 280-321949 280-320884 04/21/2016 10:01 10 TAL DEN CRR A:9045C 280 -81693 -A -3-C 280-321210 04/18/2016 08:24 1 TAL DEN IEU A:9050A► 280 -81693 -A -3-J 280-321966 04/19/2016 21:41 1 TAL DEN RSM A:9060A 280-81693-A-3 280-320916 04/14/2016 20:43 1 TAL DEN SVC A:Moisture 280-81693-A-3 280-320252 04/11/2016 17:17 1 TAL DEN CML Lab ID: 280-81693-3 MS Client ID: PIT 3 3-5 Sample Date/Time: 03/22/2016 12:30 Received Date/Time: 04/07/2016 11:33 Analysis Date Prepared / Method Bottle ID Run Batch Prep Batch Analyzed Dil Lab Analyst A:9060A 280-81693-A-3 MS 280-320916 04/14/2016 20:47 1 TAL DEN SVC Lab ID: 280-81693-3 MSD Client ID: PIT 3 3-5 Sample Date/Time: 03/22/2016 12:30 Received Date/Time: 04/07/2016 11:33 Analysis Date Prepared / Method Bottle ID Run Batch Prep Batch Analyzed Dil Lab Analyst A:9060A 280-81693-A-3 MSD 280-320916 04/14/2016 20:50 1 TAL DEN SVC TestAmerica Denver A = Analytical Method P = Prep Method Page 32 of 38 04125/2016 Quality► Control Results Client: Waste Management Laboratory Chronicle Lab ID: 280-81693-3 DU Method Bottle ID Job Number: 280-81693-1 Client ID: PIT 3 3-5 Sample Date/Time: 03/22/2016 12:30 Received Date/Time: 04/07/2016 11:33 Analysis Run Batch Date Prepared / Prep Batch Analyzed Dil Lab Analyst P:20B 280 -81693 -A -3-B DU 280-321949 280-320884 04/14/2016 18:06 10 A:20B 280 -81693 -A -3-B DU 280-321949 280-320884 04/21/2016 10:06 10 TAL DEN SEJ TAL DEN CRR A:9050A 280 -81693 -A -3-K DU 280-321966 04/19/2016 21:41 1 TAL DEN RSM Lab ID: 280-81693-4 Client ID: PIT 4 2-6 Method Sample Date/Time: 03/22/2016 12:50 Received Date/Time: 04/07/2016 11:33 Analysis Date Prepared / Bottle ID Run Batch Prep Batch Analyzed Dil Lab Analyst P:20B 280 -81693 -A -4-A A:20B 280 -81693 -A -4-A 280-321949 280-320884 04/14/2016 18:06 10 280-321949 280-320884 04/21/2016 10:09 10 TAL DEN SEJ TAL DEN CRR A:9045C 280 -81693 -A -4-B 280-321210 04/18/2016 08:24 1 TAL DEN IEU A:9050A► 280 -81693 -A -4-C 280-321966 04/19/2016 21:41 1 TAL DEN RSM A:9060A 280-81693-A-4 280-320916 04/14/2016 20:52 1 TAL DEN SVC A:Moisture 280-81693-A-4 280-320252 04/11/2016 17:17 1 TAL DEN CML Lab ID: 280-81693-5 Client ID: PIT 4 6-12 Method Sample Date/Time: 03/22/2016 12:55 Received Date/Time: 04/07/2016 11:33 Analysis Date Prepared / Bottle ID Run Batch Prep Batch Analyzed Dil Lab Analyst P:20B 280-81 693 -A -5-A A:20B 280 -81693 -A -5-A 280-321949 280-320884 04/14/2016 18:06 10 280-321949 280-320884 04/21/2016 10:12 10 TAL DEN SEJ TAL DEN CRR A:9045C 280 -81693 -A -5-B 280-321210 04/18/2016 08:24 1 TAL DEN IEU A:9050A► 280 -81693 -A -5-C 280-321966 04/19/2016 21:41 1 TAL DEN RSM A:9060A 280-81693-A-5 280-320916 04/14/2016 20:54 1 TAL DEN SVC A:Moisture 280-81693-A-5 280-320252 04/11/2016 17:17 1 TAL DEN CML Lab ID: 280-81693-6 Client ID: PIT 5 6-10 Method Sample Date/Time: 03/22/2016 13:10 Received Date/Time: 04/07/2016 11:33 Analysis Date Prepared / Bottle ID Run Batch Prep Batch Analyzed Dil Lab Analyst P:20B 280 -81693 -A -6-A► A:20B 280 -81693 -A -6-A 280-321949 280-320884 04/14/2016 18:06 10 280-321949 280-320884 04/21/2016 10:15 10 TAL DEN SEJ TAL DEN CRR A:9045C 280 -81693 -A -6-B 280-321210 04/18/2016 08:24 1 TAL DEN IEU A:9050A► 280 -81693 -A -6-J 280-321966 04/19/2016 21:41 1 TAL DEN RSM A:9060A 280-81693-A-6 280-320916 04/14/2016 20:56 1 TAL DEN SVC A:Moisture 280-81693-A-6 280-320252 04/11/2016 17:17 1 TAL DEN CML TestAmerica Denver A = Analytical Method P = Prep Method Page 33 of 38 04/25/2016 Quality► Control Results Client: Waste Management Laboratory Chronicle Lab ID: 280-81693-6 DU Method Bottle ID Client ID: PIT 5 6-10 Sample Date/Time: 03/22/2016 13:10 Analysis Run Batch Job Number: 280-81693-1 Received Date/Time: 04/07/2016 11:33 Date Prepared / Prep Batch Analyzed Dil Lab Analyst A:9045C 280 -81693 -A -6-C DU A:9045C 280 -81693 -A -6-G DU 280-321210 280-321492 04/18/2016 08:24 1 04/19/2016 11:56 1 TAL DEN IEU TAL DEN IEU Lab ID: MB Method Bottle ID Client ID: N/A Sample Date/Time: N/A Analysis Run Batch Prep Batch Received Date/Time: N/A Date Prepared / Analyzed Dil Lab Analyst P:20B A:20B MB 280-320884/1-A MB 280-320884/1-A► 280-321949 280-320884 04/14/2016 18:06 10 TAL DEN SEJ 280-321949 280-320884 04/21/2016 09:58 10 TAL DEN CRR A:9050A MB 280-321968/4-A 280-321966 04/19/2016 21:41 1 TAL DEN RSM A:9060A► MB 280-320916/4 280-320916 04/14/2016 20:41 1 TAL DEN SVC P:9081 A:9081 MB 560-127298/1-A► MB 560-127298/1-A 560-127300 560-127300 560-127298 04/22/2016 10:28 1 560-127298 04/25/2016 10:32 1 TAL CC JEM TAL CC JEM Lab ID: LCS Method Bottle ID Client ID: N/A Sample Date/Time: N/A► Analysis Run Batch Prep Batch Received Date/Time: N/A Date Prepared / Analyzed Dil Lab Analyst A:9045C A:9045C LCS 280-321059/1-A LCS 280-321338/1-A 280-321210 280-321492 04/18/2016 08:24 1 04/19/2016 11:56 1 TAL DEN IEU TAL DEN IEU A:9050A LCS 280-321968/3-A 280-321966 04/19/2016 21:41 1 TAL DEN RSM A:9060A► LCS 280-320916/3 280-320916 04/14/2016 20:39 1 TAL DEN SVC Lab ID: DU Method Bottle ID Client ID: N/A Sample Date/Time: 04/04/2016 10:30 Received Date/Time: 04/06/2016 09:30 Analysis Run Batch Date Prepared / Prep Batch Analyzed Dil Lab Analyst A:Moisture 280-81658-A-2 DU 280-320252 04/11/2016 17:17 1 TAL DEN CML Lab References: TAL CC = TestAmerica Corpus Christi TAL DEN = TestAmerica Denver TestAmerica Denver A = Analytical Method P = Prep Method Page 34 of 38 04125/2016 chain of spa Q 1 a7. 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Betsy .A 280-346281.1 Client ShippingiReceiving C. intact: Phone: iE-Flair, tetsy_ 1a@riser ainc.corn I Page: Page 1 of 1 Company: TestArnerica Laboratories, Inc- _ Analysis Requested Job P: 2 -61693-1 1 Address: t733 33 N. Padre Island !Drive Due Date 4125/2016 Requested; .'� 008119001._1'rmp Cation E?tchnngv Capacity (CCC) -TA CC I I • Preservation Codes: A -EICL I -Hexane C - Zn Acetate 1J - AsNaO2 I-14�rt►ic Acid R - 1442048 - �Iar� a a spa H -,fl n +sta Ait - SF H - Acid - TSF' Docietrydrate 1- Ice LII - AceCane J - Dl Water' V -MCA K - ELITA W = ph 4-5 City: Corpus Christi TAT Requested (da *. ,_ ,t . Rate, Elp: T , 78405 3'61-268` 73(Tel) 361-269-24471(Fax) I �Fiel F Itsrad Ss p ti NA or Nn �b-p =_= ° _I. • . - ' ISpecial , Err ail: ,'Jtl it: I r 5°681North ct Nerve: Weld f Pric.; � 2800304 Other : Sits: 588jNorth Weld Landfill SSOW I':n�#�u�1i�In�r�'�x�fil�� Sample Sample Type (CrComp. °artil iar, Sam • le Identification - Client ID (Lab !I DI � S�Irn Abe Date Time Or -Arab) . • _ Preser v anon Code: ' • I - i .. I ^F ..l LL _ PIT 1 24 (28181693A } - 3'",x'16 _ 11:5i0Y Mountain Solid PIT 2 5-9 (28 693 4) 3122116 :10Y Mountain , Solid 1 I • 1 1 i I - IIi i I 1MINI I ..• Y ! '+ s: ib/e~ I'azard fdenlificartfon 'am le Dls, o.slal ( A Ie maybe assessed' rf samples are rretaine*dr lon er` �}aar I montth) C MN ti rcoraiirlme,d' Return T+b P:re O*Ep v air' Leb L e For Month — - - ae:liwerabFe l .eaquested: L IF. lII, l "w 'Other(spe :l y`} ' pe ial InstractionsJQC Requirement : r� I it F I i.l uishled t Date: Ti Ire :, , ..rp �ui4c �I t�c�nr�� f • a � D►I'Tm�;: - '�o+mpan� - .R,.� .. _ " •IPe,inquishea by DatEgrirne: IComparay i sc �e i a}� ; ID4�tie ►I' rt+Et: �orrtpany 1 -. Clinquisbed Cy: OateM e: Ctxmpaa y J Recaiv ! br' �. D,atetTime: COrm$ii'"I" Custody Seals A Yes Yes A Intact: No Custody Seal No.: Cockier TemperaureCsl '=t end Vie; Rerrarics: I��. la r7r/'1y.1,■ Login Sample Receipt Checklist Client: Waste Management Login Number: 81693 List Number 1 Creator Muniz, Ashley T Question Answer Comment Job Number: 280-81693-1 List Source: TestAmerica Denver Radioactivity either was not measured or, if measured, is at or below background The cooler's custody seal, if present, is intact. The cooler or samples do not appear to have been compromised or tampered with. Samples were received on ice. Cooler Temperature is acceptable. Cooler Temperature is recorded. COC is present. COC is filled out in ink and legible. COC is filled out with all pertinent information. Is the Field Sampler's name present on COC? There are no discrepancies between the sample IDs on the containers and the COC. Samples are received within Holding Time (Excluding tests with immediate HTs).. Sample containers have legible labels. Containers are not broken or leaking. Sample collection date/times are provided. Appropriate sample containers are used. Sample bottles are completely filled. Sample Preservation Verified There is sufficient vol. for all requested analyses, incl. any requested MS/MSDs VOA sample vials do not have headspace or bubble is <6mm (1/4") in diameter. If necessary, staff have been informed of any short hold time or quick TAT needs Multiphasic samples are not present. Samples do not require splitting or compositing. Sampling Company provided. Samples received within 48 hours of sampling. Samples requiring field filtration have been filtered in the field. Chlorine Residual checked. N/A True True False False True True True True True True True True True True True True N/A True True True True True True True True N/A TestAmerica Denver Page 37 of 38 04125/2016 Login Sample Receipt Checklist Client Waste Management Job Number: 280-81693-1 Login Number: 81693 List Number 2 Creator: Etter, Corey M Question List Source: TestAmerica Corpus Christi List Creation: 04/12/16 05:05 PM Answer Comment Radioactivity wasn't checked or is <1= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True 1.4 obs. 12.0 con-. 1R9 COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? False ICOC There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A TestAmerica Denver Page 38 of 38 04/25/2016 Report of Geotechnical Investigation December 2016 North Weld Landfill Unit 2 APPENDIX F SAIL WATER CHARACTERISTIC CURVE RESULTS 152047 FINAL Soil Water Characteristic Curve Results Swift River Environmetal Project No. 2016.R006 Applied Witter lie chef: in A Conn Island Drive Sparks. Nevada $5431 Ph: 778. 5500 Fat 775.284.5504, vamt_applledmiffesitet Sample Suction Bars cm Gravimetric Moisture Content Final Dry (pcf) Density Final Moisture Volumetric Content van Genuchten Parameters, cm a n m el. e5 Test 6"-12' Pit #4 bgs 0.04 40.79 21.5 100.5 0.346 0.01 1.22482 0.18355 0.000 0.377 0.333 339.6 18.0 98.5 0.284 1 1,020 13.9 98.5 0.219 4 4,079 9.8 99.4 0.156 10.7 10,911 8.1 102.8 0.133 22.5 22,943 6.2 102.7 0.102 Test 6'-10' Pit #5 bgs •0.04 40.79 25.1 99.4 0.400 0.006 1.24000 0.19355 0.000 0.408 0.333 339.6 19.9 98.2 0.313 1 1,020 16.1 95.4 0.246 4 4,079 a 13.0 a 98.6 0.205 7.1 7,240 10.4 102.5 0.171 16.3 16,621 8.5 a 102.4 0.139 37.5 38,239 6.4 102.5 0.105 .., bo v a c iz c L ru a- 3" 2" 100 1.5" 1113/4" 1/2'3/8" No. 4 No. 10 No. 16 No. 40 No. 100 No. 200 Silt Clay <- - - 90 1 1 I I II II 1 I II II 1 I 1 II 1 I 1 I I T I P 1 I I I --1 1 I I I 1 _ - 30 I I 1 1 1 II I ii 1 I I II I I I 1 1 I 1 I 1 I I 1 1 I 1 I 1 M 1 I I I 1 I 1 P 1 I I 1 I - _ _I 70 I 1 I I II I I I I II I 1 I I II I I I I I P 1 I I 1 I I M 1 I 1 I _ - - 60 1 I 1 I I I pi II 1 I I I ii I I 1 1 II II 1 1 1 I I 1 I I I 1 I P I 1 I I I 1 1 M I I _ - - I I I I II I I I I I I II I I I I I I 1 1 I I I I I I I I I 1 I 1 1 I I I I 1 1 I 1 I I I I 50 - - - 40 I I I II II II II II I II II I ii I I I 1 P 1 I I I 1 I I I I I _ - 30 1 I I I ;I II II II I II II II 1 1 II II II 1 1 I I I s I 1 I s I 1 I I I 1 1 1 I 1 I -1 :1 _ 20 I II II II II II I II ii 1 I 1 I I I P 1 I I I I I 1 1 1 Ia3/4413/4%.\\ I = - 10 1 I I 1 I II II II 1 II II II II II II II II I 1 I I 1 1 I I I 1 I I I 1 1 I I 1 I I - :I 0 I I I I I I II I I 1 I I II 1 I 1 I I 1 I II I' I I I I I I I 1 I M r 1 I I r 1 1 I I I I I I 100 10 1 Partide Size, a Hydrometer mm 0.1 0.01 0.001 Particle Size, mm Percent Passing by Dry Weight dates Notes 2 100 Generated By Post- Mechanical Sieve 1.18 100 Results 0.425 99.93 Hydrometer 0.1500 99.6 0.0801 72.0 Generated By Analysis 0.0605 56.0 0.0438 50.0 0.0321 40.0 0.0230 36.0 0.0164 34.0 Results 0.0120 32.0 Hydrometer 0.0086 30.0 Sedimentation 0.0061 28.0 0.0043 28.0 0.0031 26.0 0.0022 22.0 0.0013 10.0 S�w►Ift Laboratory Rlwer Enwlronrnental Testing Servl0esIF►IOL1dll't Hydrometer Test Pit ASTM ##46'-12'bs Analysis D422 Ph: 'NlI IATFS„. 56 Sparks, 775.284.5500 Coney Nevada Island Fax: M 89431 775.284.5504 Drive I I i�Ph' Assoc 3" 2" 13" 1" 3/4" 1/2'3/8" No.4 No. 10 No.16 No. 40 No. 100 No. 200 Silt 100 f1-4 Clay - - - 90 I I I I I II I I 1 i I 1 1 I i I I I I I I i I I I I 1 I I 1 r 1 i I _ - - I I I I I ii II II I i I Pill I I i i I I 1 I I I I I I i I I I I I 1 1 1 r I I I I I 80 - - _ I I I 1 Pi I I 1 I I 1 i II Pill I I i i I I I I I I I I I I I I I I I 1 1 1 r 1 1 I I 1 70 :I _ I I II I pi I II Pill I II i ii I I i } 1 I I I I 1 1 r I 1 I 50 iii-- - _ Q 50 I IIIIIII I I I I I I I _ I 1 II I I I L I I I I I I I I I i_ I I I I I r 1 I r I I I I >1 - L = LL - 40 I I I I 1 I PI I I I I I 1 I I I I I I I I I I 1 1 I 1 1 I I 1 I U - 0- - 30 I I I I I I I I 1 I I PI 1 I I I 1 I II I I I I I I I 1 I I I I p I 1 1 I r 1 I I I I 1 I I - - 20 I I I I I II I I 1 I I i I Pill I i I I I I I I I I I I I I I I I 1- I I 1 p 1 r p 1 I I i I - - 10- I I I I I I I I 1 I Pill I I I i I 1 I I I I I I I I P I I 1 1 I I I 1 - _ 0 I I I I I I II II I I I Pill I I 1 I I I I I I I I I I I II I I I I I 1 p I I 1 1 r I 1 I I 1 100 10 1 Particle Size, Hydrometer 0.1 mm 0.01 0.001 c -a. Particle Size, mm Hydrometer Percent Passing by Dry Weight Notes 2 100.0 Generated By Post Mechanical Sieve 1.18 100.0 Results 0.425 99.9 Hydrometer 0.1500 99.8 (10801 72.0 Generated By Sedimentation Hydrometer 0.0596 60.0 0.0434 52.0 0.0319 42.0 0.0228 38.0 0.0163 36.0 Results 0.0120 32.0 Analysis 0.0086 30.0 0.0061 28.0 0.0043 28.0 0.0031 24.0 0.0023 22.0 0.0013 10.0 Swift Laboratory River Environmental Testing Services Hydrometer Project Test Pit ASTEV1 No. #5 6'-10' D422 2016.R006Nevada Analysis bgs �IiLiiiifIIhiflu i ASSOCIATIEStki ll 56 Sparks, im �I coney �3 HI Island in ilto Drive � �� Soil Water Characteristic Curve Results Swift River Environmental bpplied Sod Water Technologist 56 Carey HIa M Dflvo SPrigt, We a4a $9431 Ph.; 715.4.5M FAX; 7752344;44 vftwasphatiztrialErzoir Sample � Suction (Bars) Gravimetric Moisture Content Initial Density (pcf) Dry Volumetric Moisture Content Final DrE�nSlt�f (pet) Dry 1 Volumetric Moisture Content Test Pit 6'42' 0.04 21.5 1O2.9 0.355 100.5 0.346 1/3 18.0 103.0 0.297 98.5 0.284 4, 1 13.9 1O2.7 0.229 98.5 O.219 bgs 4 9.8 103.2 0.162 99.4 0.156 10.7 8.1 102.8 0.133 102.8 0.133 22.5 6.2 102.7 0.102 102.7 0.102 Test 61-10' Pit 0.04 25.1 102.8 0.414 99.4 0.400 113 19.9 1O2.9 0.328 98.2 O.313 #5, 1 16.1 1O2.6 0.265 95.4 O.246 bgs7.1 4 13.0 102.8 O.214 98.6 0.205 10.4 1. 2 0 .5 O.171 10 0 2.5 1 1 0. � 16.3 8.5 102.4 0.139 102.4 0.139 37.5 6.4 102.5 0.105 102.5 0.105 NOTE 1: Volumetric moisture content calculations from both the remolded and final dry densities are reported due to the amount of swelling that occurred during specimen saturation. Laboratory Soil Water Characteristic Curve TP#4, 6'-12' bgs 100 10 og Suction, bars 1 0.1 0.01 I I I i I i I 0.000 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 Volumetric Moisture Content aeslnitial Dry Density —Final Dry Density Swift River Environmental Services, LLC. Laboratory Testing Laboratory Soil Water Characteristic Curves ASTM D6836 Project No. 2016.R006 Applied Sod Water Technologies 56 Coney Island Drive Sparks, Nevada 89431 Ph: 775.284.5500 Fax: 775.284.5504 www.appliedsoilwater. com Laboratory Soil Water Characteristic Curve TP#5, 6'-10' bgs 100 10 og Suction, bars 1 0.1 0.01 1 I I 1 I I 1 f I 0.000 0.050 0.100 0.150 0.200 0.250 O.3O0 0.350 0.400 0.450 Volumetric Moisture Content —0—Initial Dry Density Final Dry Density Swift River Environmental Services, LLC. Laboratory Testing Laboratory Soil Water Characteristic Curves ASTM D6836 Project No. 2016.R006 Applied Sod Water Technologies 56 Coney Island Drive Sparks, Nevada 89431 Ph: 775.284.5500 Fax: 775.284.5504 www.appliedsoilwater. com APPENDIX B-2 REPORT OF HYDROGEOLOGICAL CHARACTERIZATION, NORTH WELD LANDFILL UNIT 2, PERMITTING AND DEVELOPMENT (SWiFT RIVER ENVIRONMENTAL SERVICES, LLC; DECEMBER 2016) FINAL REPORT HYDR0GE0LOGIC CHARACTERIZATION OF NORTH WELD LANDFILL UNIT 2 PERMITTING AND DEVELOPMENT WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. Prepared by SWIFT RIVER ENVIRONMENTAL SERVICES, LLC An Alaska Native Corporation 26 West Dry Creek Circle, Suite 470 4 Littleton, Colorado • 303-695-4660 DECEMBER 2016 FINAL REPORT HYDROGEOLOGIC CHARACTERIZATION FOR NORTH WELD LANDFILL UNIT 2 Permitting and Development Prepared by SWIFT RIVER ENVIRONMENTAL SERVICES, LLC An Alaska Native Corporation December 2016 Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 CONTENTS 1 2 3 4 INTRODUCTION AND PURPOSE............................................................................................1-1 1.1 INTRODUCTION 1-1 1.2 PURPOSE OF INVESTIGATION 1-2 SITE CONDITIONS S...................................................................................................................... 2-1 2.1 SITE LOCATION 2-1 2.2 SITE TOPOGRAPHY 2-1 2.3 DEVELOPMENT HISTORY 2-2 HYD RO GE O LO GY DATA C O L LE CTI O N................................................................................. 3-1 3.1 INVESTIGATION SUMMARY 3-1 3.2 FIELD DATA COLLECTION 3-2 3.2.1 Hydrogeologic Boring Locations 3-2 3.2.2 Drilling and Well Installation 3-2 3.2.3 Lithologic Sample Description 3-3 3.2.4 Temporary Monitoring Wells 3-3 3.3 LABORATORY AND FIELD QUALITY ASSURANCE AND QUALITY CONTROL 3-6 3.3.1 Sample Receiving 3-6 3.3.2 Holding Times 3-7 3.3.3 Trip Blanks 3-7 3.3.4 Method Blanks 3-7 3.3.5 Laboratory Control Samples 3-7 3.3.6 Matrix Spike (MS) and Matrix Spike Duplicate (MSD) 3-8 3.3.7 Organics 3-8 3.3.8 Inorganic Chemistry 3-8 3.3.9 Duplicate Sample 3-8 3.4 SAMPLE ANALYSES RESULTS 3-9 3.4.1 Groundwater Sample Results 3-9 3.4.2 Drilling Water Sample Results 3-9 3.5 HYDRAULIC CONDUCTIVITY TESTS 3-10 3.5.1 Slug Tests 3-10 3.5.2 Laboratory Permeability Tests 3-11 REGIONAL GEOLOGY................................................................................................................4-1 4.1 REGIONAL STRATIGRAPHY AND STRUCTURE 4-1 4.1.1 Surficial Strata 4-1 4.1.2 Denver Basin Bedrock Strata 4-2 4.2 REGIONAL HYDROGEOLOGY 4-3 4.3 WELL SURVEY 4-4 5 SITE GEOLOGY ............................................................................................................................ 5-1 5.1 SITE STRATIGRAPHY AND STRUCTURE 5-2 152047 i FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 5.1.1 Site Stratigraphy 5-2 5.1.2 Structure S-3 5.2 SITE HYDROGEOLOGY 5-5 5.2.1 Groundwater Occurrence 5-5 5.2.2 Groundwater Flow 5-6 5.2.3 Hydraulic Conductivity 5-7 5.2.4 Flow Rate 5-8 5.3 SITE GROUNDWATER QUALITY 5-9 5.3.1 General Water Quality 5-9 5.3.2 Analytical Results 5-11 5.3.3 Comparison of NWLF Unit 2 Water Quality to Regional Water Quality 5-12 6 7 FINDINGS & RECOMNIENDATIONS....................................................................................... 6-1 6.1 CONCEPTUAL HYDROGEOLOGIC MODEL 6-1 6.2 GROUNDWATER MONITORING 6-3 6.3 GROUNDWATER MONITORING PLAN 6-4 6.4 WELL CLOSURE 6-4 REFERENCES................................................................................................................................ 7-1 APPENDICES A - FIGURES Figure 1: Site Location Map Figure 2: Topographic Map of NWLF Unit 2 and Vicinity Figure 3: Site Map and Hydrogeologic Characterization Investigation Locations Figure 4: Land Use of NWLF Unit 2 and Vicinity Figure 5: Topography and Surface Water Flow Patterns and Water Features in Vicinity of NWLF Unit 2 Figure 6: Detail of Topography and Surface Water Flow Patterns of NWLF Unit 2 Figure 7: Location of NWLF within the Denver Basin in Plan View and Geologic Cross -Sections Figure 8: Stratigraphic hi c and Hydrogeologic Units in the Denver Basin Figure 9: Structure Contours on Base of Laramie -Fox Hills in the Denver Basin Figure 10: Regional Groundwater Flow Direction and Saturated Thickness of the Laramie -Fox Hills Aquifer in the Denver Basin Figure 11: Cross -Section Location Map Figure 12: Cross Section A -A' Figure 13: Cross Section B -B' Figure 14: Cross Section C -C Figure 15: Cross Section D -D' Figure 16: Cross Section E -E' Figure 17: Groundwater Flow Direction, Upper Laramie / Alluvium, May 2016 152047 ii FINAL Hydrogeologic Characterization North Weld Landfill Unit 2 Figure 18 Figure 19: Figure 20: Figure 21: Figure 22: B - TABLES Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: December 2016 Groundwater Contour Map and Flow Direction, Fox Hills Sandstone, March and May 2016 Permitted Water Wells within One Mile of NWLF Units 1 and 2 Stiff Diagrams for Temporary Wells and Monitor Wells, NWLF Units 1 and 2 Piper Diagram for Temporary Wells and Monitor Wells, NWLF Units 1 and2 Conceptual Hydrogeologic Model Temporary Well Construction Details Temporary Well Development Details Groundwater Elevation Data Water Sampling Data Hydraulic Conductivity Test Results Permitted Water Wells within One Mile of NWLF Units 1 and 2 C - TEMPORARY WELL INSTALLATION RECORDS - BORING LOGS AND COMPLETION REPORTS D - LABORATORY TESTING RESULTS - GROUNDWATER AND RIG WATER E - LABORATORY PERMEABILITY RESULTS F - SLUG TESTING RESULTS 152047 in FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 1 INTRODUCTION AND PURPOSE 1.1 INTRODUCTION This "Report of Hydrogeologic Characterization for North Weld Landfill Unit 2" describes activities conducted by Swift River Environmental Services, LLC (Swift River) to assist Waste Management Disposal Services of Colorado (WMDSC) with the permitting and development of the North Weld Landfill (NWIT) Unit 2. The Hydrogeologic Characterization was accomplished by completing a subsurface investigation of the NWLF Unit 2 area, conducting field and laboratory testing, and evaluating the collected data. The purpose for the investigation was to develop an understanding of hydrogeologic (i.e., groundwater) conditions that will be considered in landfill design and construction, and subsequent environmental monitoring. The hydrogeologic investigation included completion of soil borings, shallow test pits, installation of temporary piezometers and wells, field testing, and laboratory analyses. Field testing was done to determine hydraulic conductivity of the stratigraphic zones monitored in the temporary wells. Laboratory analyses were done to determine water -quality characteristics of groundwater samples. The hydrogeologic characterization investigation of NWLF Unit 2 was done concurrently with a geotechnical investigation of the NWLF Unit 2 area and the results of the geotechnical investigation, which are included in a separate report, were included in the evaluation of the hydrogeologic characterization. The process of planning, design, and permitting of NWLF Unit 2 includes completion of this Hydrogeologic Characterization and the Geotechnical Investigation. A "Workplan for Hydrogeologic Characterization and Geotechnical Investigation" (Workplan, dated February 2016) was prepared by Swift River to be consistent with data requirements outlined in Colorado's Solid Waste Rules and was approved for implementation by WMDSC. The Hydrogeologic Characterization Investigation work closely followed the approved Workplan and consisted of the following tasks: • Pre -field work planning, subcontractor arrangements, and mobilization to the site; • Oversight and stratigraphic logging of soil borings and collection of disturbed and undisturbed soil samples; 152047 1-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 • Installation and development of temporary monitoring wells; • Groundwater sampling and sample submittal to the laboratory for analysis; • Slug tests completed in temporary monitoring wells; • Review and interpretation of field and laboratory analytical data; • Development of boring logs, data summary tables, hydrogeologic cross -sections, and site characterization maps; and • Preparation of this Hydrogeologic Characterization for NWLF Unit 2. The locations of the soil borings, test pits, temporary piezometers, and temporary wells completed as part of this Hydrogeologic Characterization and the Geotechnical Investigation are shown in Figure 3, Site Map and Hydrogeologic Characterization Investigation Locations. 1.2 PURPOSE OF INVESTIGATION The HydrogeologicCharacterization was performed to characterize geologic strata and groundwater conditions to a depth of about 129 feet below ground surface at the NWLF Unit 2. The hydrogeologic characterization of the NWLF Unit 2 provides the following technical information and data evaluation: • Identify possible presence of groundwater within geologic strata between ground surface and about 20 feet below planned disposal cell base grade; • Identify presence of groundwater regime(s) deeper than 20 feet below planned base grade with the principal purpose of determining saturated geologic intervals at NWLF Unit 2 that are appropriate for groundwater monitoring and determine correlation of such regime(s) with groundwater conditions beneath NWLF Unit 1; • Evaluate the hydraulic conductivity of geologic materials below NWLF Unit 2 by soil laboratory testing and field (slug) test methods (i.e., groundwater); and • Collect groundwater samples and determine baseline water quality conditions for volatile organic compounds and major ions. Planned base grades, as considered for the Workplan and Hydrogeologic Characterization, are a preliminary estimate for the cell bottom configuration. The planned disposal cell base 152047 1-2 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit grade is subject to change based on the findings of the Geotechnical Investigation' and Hydrogeologic Characterization, as well as on the basis of other design considerations. The "20 -feet below planned base grade" depth objective for determination of the presence/absence of groundwater was selected to provide design flexibility in the event that a lower elevation base grade is determined through the Unit 2 design process. The final primary purpose of the Hydrogeologic Characterization is the development of this report as the comprehensive compilation of hydrogeologic characterization data and the results of characterization data evaluation. 1 The "Geotechnical Investigation, North Weld Landfill Unit 2, Final Report" is a separate report completed in December 2016. 152047 1-3 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 SITE CONDITIONS 2.1 SITE LOCATION The existing North Weld Landfill Unit 1 (NWLF Unit 1) is an active landfill that consists of a 122 -acre waste disposal footprint. The proposed NWLF Unit 2 is contiguous property that is north of the NWLF Unit 1 footprint and includes approximate 359 acres. NWLF (Units 1 and 2) is located approximately five miles west of the town of Ault and 14 miles east of Fort Collins on Colorado State Highway 14, in northern Weld County, Colorado, as shown on Figure 1, Site Location Map. NWLF Unit 1 and Unit 2 primarily are located in the southwest and northwest quarters, respectively, of Section 7, Township 7 North, Range 66 West of the Sixth Principal Meridian. Unit 2 also extends into the northeast quarter of Section 7. The location is shown on Figure 2, Topographic Map of NWLF Unit 2 and Vicinity. 2.2 SITE TOPOGRAPHY NWLF Unit 2 is topographically characterized as an upland area with a relative uniform slope toward the regional drainage feature (i.e., Coal Bank Creek) that is located about 0.25 mile (1320 feet) east of NWLF Unit 2. Natural, pre -development topographic elevations across the site range from a high of approximately 5,150 feet MSL along the western boundary of the area to a low of approximately 5,070 feet MSL along a man-made drainage channel (Fierce Lateral irrigation ditch) that marks the eastern boundary of the area (Figure 6, Topography and Surface -Water Flow). The NWLF Unit 2 topography is crossed by a few very shallow drainage swales, none of which include perennial surface -water flow features. The majority of the NWLF Unit 2 surface area is in agricultural use for dry land crops. Figure 4 primarily shows the present land use of Section 7, including the NWLF Unit 1 landfill and the NWLF Unit 2 farmed field. Figure 5 shows the topography and surface -water flow patterns and water features in the vicinity of NWLF Unit 2. A west to east elongated soil stockpile that is associated with excavation of NWLF Unit 1 disposal cells is present along the southern side of the NWLF Unit 2 area. Elevations on the 152047 2-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit stockpile are as high as 5149 feet MSL and represent stockpiles that rise no more than SO feet above the natural NWLF Unit 2 terrain. 2.3 DEVELOPMENT HISTORY NWLF is located on land that primarily was agricultural land used for dry -land farming prior to the development of the current landfill operation. Hydrogeologic and geotechnical investigations began in 1989 to evaluate the property for potential development as a municipal solid waste disposal site. NWLF received its initial Certificate of Designation (CD) from the Weld County Board of County Commissioners on June 28, 1990, and construction of the first disposal cell was completed in December 1991. NWLF opened to the public for its first receipt of municipal solid waste on February 3, 1992. Weld County "use by special review" (USIA) designations for NWLF Unit 1 and other WMDSC operations at NWLF are indicted on maps provided with this report 152047 2-2 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 3 HYDROGEOLOGY DATA COLLECTION 3.1 INVESTIGATION SUMMARY From February 19 to March 2, 2016, Swift River personnel oversaw the drilling of eight soil borings for the installation of temporary wells in the NWLF Unit 2 area. The planned depth of each temporary well was based on the objective of identifying the presence or absence of shallow or deep groundwater to a depth of about 100 feet. The shallow temporary wells were planned to be about SO feet deep and the deep temporary wells were planned to be about 100 feet deep. Well depths were adjusted in the field based on groundwater conditions observed, and the actual maximum depth of investigation was extended to 129 feet below ground surface at temporary well TW-2. Shallow temporary wells were designated TW-1, 5, and 9 and deep temporary wells were designated TW-2, 4, 6, 8, and 10. Shallow wells TW-3 and TW-7 were planned, but were not drilled based on the absence of shallow groundwater in the paired deep wells (TW-4 and TW-8). Soil samples were collected from each boring by a continuous coring method for visual inspection and description. All of the temporary monitoring wells except shallow well TW-1 were located about So feet outside the proposed NWLF Unit 2 footprint. Shallow temporary well TW-1 was located within the boundary of NWLF Unit 1. With the exception of well TW-1 and deep well TW-2 (located on the west side of NWLF Unit 2), the temporary wells were proposed as paired shallow/deep wells along the north and eastern side of the NWLF Unit 2. The planned paired well locations were TW-3/TW-4, TW-5 /TW-6, TW-7/TW-8, and 11N -9/11N-10. As noted above, planned temporary wells TW-3 and TW-7 were not drilled. Boring records are provided in Appendix C and stratigraphic interpretation and test results pertinent to the hydrogeologic characterization of the NWLF Unit 2 are summarized in Sections 4 and 5. 152047 3-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 3.2 FIELD DATA COLLECTION 3.2.1 Hydrogeologic Boring Locations Swift River personnel walked and observed surface conditions in the NWLF Unit 2 area and staked locations for 10 temporary monitoring wells on February 5, 2016. Nine proposed temporary well locations were positioned about 50 feet outside the proposed NWLF Unit 2 footprint to avoid cell, access road, and drainage ditch construction. One shallow temporary well (TW-1) was located within the boundaries of NWLF Unit 1. A single deep well (TW-2) was proposed at location on the west side of NWLF Unit 2. Other temporary well positions were proposed as paired shallow/deep wells located along the north and eastern side of the NWLF Unit 2 were at TWIT -3 /TW-4, TW-S/TW-6, TW-7/TW-8, and TW-9/TW-10. Based on encountered field conditions, temporary wells TW-3 and TWIT -7 were not drilled or installed. Ultimately, eight temporary wells were installed; the locations are shown on Figure 3, Site Map and Hydrogeologic Characterization Investigation Locations included in Appendix A. The planned depth of each temporary well boring was based on the objective of identifying the presence or absence of shallow or deep groundwater and monitoring the same. The well borings were planned to be SO feet deep for the shallow wells and 100 feet deep for the deep wells, but drilled depths were adjusted based on actual subsurface conditions, with one boring (TW-2) extending to 129 feet below ground surface. The three installed temporary shallow well locations were designated TW-1, 5, and 9 and the five temporary deep well locations were designated TW-2, 5, 6, 8, and 10. The planned drilling depths are presented in the Workplan and actual drilling depths are presented in Table 1 included in Appendix B. 3.2.2 Drilling and Well Installation The temporary well borings were drilled by Drilling Engineers, Inc. of Ft. Collins, Colorado. The hydrogeologic characterization drilling program began on February 19, 2016 and was completed on March 2, 2016. Borings were drilled using a CNIE-75 drill rig with an 8.25 inch outer diameter hollow -stem auger. The borings were sampled using a five -feet long 152047 3-2 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit continuous soil sampler to maximize recovery of penetrated materials for thorough description and development of lithologic boring logs. Material descriptions and depths were recorded in the field and are presented in the soil boring records included in Appendix C. 3.2.3 Lithologic Sample Description During boring advancement, Swift River prepared detailed descriptions of recovered soil material and retained representative portions of the soil samples from each five-foot long continuous core sample. Samples were marked with the boring number and depth. The retained soil samples were available during review of the soil boring records to aid in correlation between different borings and development of cross -sections across the NWLF Unit 2 area. 3.2.4 Temporary Monitoring Wells 3.2.4.1 Drilling and Well Installation Eight soil borings were advanced for the installation of the temporary monitoring wells. At paired monitor well locations, the deep well was drilled and installed first to determine the presence of shallow water. Temporary wells were drilled where shallow groundwater was present. The temporary wells were installed with the following construction details. • 2.0 -inch inside diameter Schedule 40 PVC casing, screen, and bottom cap. Screen lengths of S to 20 feet of 0.010 -inch factory -slotted well screen. • Well screen positioned at the bottom of the boring. • Sand pack was installed with a 10/20 sand filter around the well screen to about three feet above the well screen. • Bentonite pellet seal, two -feet thick, placed above the sand pack and hydrated with potable water. • Bentonite grout, place from the pellet seal to four feet below ground surface. 152047 3-3 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 • Bentonite chips placed from the top of the grout to the ground surface. • Casing projection above ground surface of approximately 3 feet, completed with a locked "J" cap. Because the monitoring wells were completed as temporary for this investigation, concrete surface pads with protective posts were not installed. Alternatively, a high -visibility marker was placed on top of each well. Additional wellhead protection (e.g., steel T -posts) were installed by WMDSC. Temporary well construction details are summarized in Table 1. 3.2.4.2 Well Development Well development was started on March 3, 2016 and completed on March 6, 2016. Well development was accomplished by bailing/surging to remove water and sediment from the temporary wells and by pumping using a non -dedicated submersible pump. Measurements of pH, temperature, and specific conductance were collected at regular intervals through the development process. Well development was continued until the change in pH, turbidity, temperature, and conductivity readings from the development water stabilized to within 10 percent over three consecutive measurements and the water was relatively clear (i.e., visual turbidity changed from brown to tan or no color). With the exception of wells TW-2 and TW-9 that had low yield and slow recovery, the NWLF Unit 2 temporary wells were developed thoroughly in general accordance with typical industry practice. Well development details are included in Table 2. 3.2.4.3 Groundwater Elevation Measurements Groundwater samples were collected by Swift River on May 3 and 4, 2016 from the eight temporary wells. Prior to groundwater purging and sampling at each well, water -level measurements were made and recorded to the nearest 0.01 foot. The groundwater levels are considered together with data for monitoring wells on the NWLF Unit 1 area to develop the groundwater -level contour maps (Figures 17 and 18) used to determine groundwater - 152047 3-4 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 flow direction and gradient. The monitor well completion summary, datum elevation, depths to groundwater, and water -level elevations are presented in Tables 2 and 3. 3.2.4.4 Groundwater Sampling and Analyses Groundwater sampling was done at wells TW-1, TW-2, TW-4, TW-5, TW-6, TW-S, TW-9, and TW-10. Purging and sampling were performed with a non -dedicated QED SamplePro® low -flow bladder pump using dedicated tubing and a new bladder for each well sampled. In accordance with the low -flow purging protocol, a minimum of three times the sampling system volume was removed.2 Field measurements of pH, specific conductance, and temperature were made to confirm that these measured values stabilized (i.e., changed by 10 percent or less) between purging of two sequential sampling system volumes. Field measurements also were recorded for turbidity, dissolved oxygen, and oxidation-reduction potential (ORP). Samples for Subtitle D Appendix I VOCs, dissolved metals, and general water -quality parameters, including major anions and cations were collected immediately after purging. Groundwater color, clarity, and odor were observed and noted on groundwater sampling data sheets. The following field and analytical parameters were determined. • Field Measurements: Water Level, Specific Conductance, pH, temperature, turbidity, dissolved oxygen and ORP. • Laboratory Analyses: Calcium, Chloride, Magnesium, Sulfate, Potassium, Carbonate, Sodium, Bicarbonate, and volatile organic compounds (VOCs). Field information forms (FIFs] were prepared to include well completion information, field parameter measurements, purge volumes, and general field observations for this sampling event. The FIFs are included with the laboratory analytical report provided in Appendix D. A summary of the results is shown in Table 4. 2 Sampling system volume includes the combined volumes of bladder pump, tubing, and flow -through cell. Low flow purging does not consider the total volume of water inside the well. 152047 3-5 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 3.2.4.5 Well Completion Reports In accordance with 2005 Colorado Water Well Construction Rules, well completion reports for the temporary wells that encountered groundwater were filed with the Office of the State Engineer on June 8, 2016. Temporary wells must be abandoned or permitted within one year (or 18 months, per a recent rule change). WMDSC will make the determination within one year to complete the wells for long-term use or to properly abandon them. Appropriate documentation of the decision must be submitted to the State Engineer. Surface completion of wells as long-term monitoring points should include providing locking well cover, concrete pad, and steel barrier posts. Well completion reports are included in Appendix C. 3.3 LABORATORY AND FIELD QUALITY ASSURANCE AND QUALITY CONTROL Groundwater samples and drilling water samples collected at NWLF Unit 2 as part of this Hydrogeologic Characterization were submitted to TestAmerica Laboratories, Inc., in Arvada, Colorado, for chemical analysis. TestAmerica, a Waste Management contract laboratory, is qualified to perform chemical analysis for municipal solid waste landfill sites. Groundwater samples collected on May 3 and 4, 2016 were submitted to TestAmerica for analysis on May 5, 2016. Drilling water samples were collected on March 4, 2016 and submitted on the same day. Laboratory reports listing laboratory -specific reporting limits (e.g., Practical Quantification Limits, PQLs, and Method Detection Limits, MDLs) are included in Appendix D. 3.3.1 Sample Receiving The groundwater sample shipping container was received in acceptable condition, properly preserved and on ice, with a cooler temperature of 4.5°C at the laboratory. The cooler temperature was within the desired range (4° C ± r C). The drilling water sample was received in acceptable condition, properly preserved and on ice, with a cooler temperature of 0.2 ° C at the laboratory. The cooler temperature was lower 152047 3-6 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 than the desired range, but review of receipt documentation did not reveal a laboratory concern regarding sample condition related to the low temperature. 3.3.2 Holding Times The laboratory identified no holding time issues with the groundwater samples or the drilling water samples. 3.3.3 Trip Blanks VOCs were not detected in the trip blanks that accompanied the groundwater samples while being transported from and back to the laboratory. A trip blank was not believed necessary for the single drilling water sample analyzed. 3.3.4 Method Blanks The Method Blank results (MB) were within established control limits for both sample sets. 3.3.5 Laboratory Control Samples The following information was provided for the Laboratory Control Sample (LCS) results. • Report Number 82795-1 (Groundwater Sampling) The Method 2320B LCS/LCSD exhibited BPD data outside the QC control limits for Total Alkalinity. Both the LCS and LCSD were recovered within QC control limits, demonstrating that the laboratory performed the method within acceptable guidelines; therefore, corrective action is deemed unnecessary. • Report Number 80430-1 (Drilling Water Sampling) All Laboratory Control Samples were within established control limits. The LCS results do not impact the validity of the reported data and have no impact on data interpretations contained in this Hydrogeologic Characterization report. 152047 3-7 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 3.3.6 Matrix Spike (MS) and Matrix Spike Duplicate (MSD) All MS and MSD samples for the groundwater sampling and the drilling water sampling were within established control limits. 3.3.7 Organics The following laboratory QC comment is applicable to the organics analyses. • Report Number 82 79 5-1 (Groundwater Sampling) The Method 8260B surrogate recovery of l,2 -D chloroethane-d4 was above the upper control limit for samples TW-5 and TW-D. Because the data are considered to be biased high and all target analyses in the sample were non - detect above the reporting limits, corrective action was deemed unnecessary. • Report Number 80430-1 (Drilling Water Sampling) The Method 8260E surrogate recovery of Dibromofluoromethane was below control limits during the analysis of sample RIG TANK Because the chromatograms exhibited clear evidence of matrix interference and all other quality control samples met acceptance criteria, corrective action was deemed unnecessary. 3.3.8 Inorganic Chemistry The laboratory made no quality control comments with regard to general inorganic chemistry (i.e., selected metals and anions) for either sample set. 3.3.9 Duplicate Sample A duplicate sample, labeled TW-D, was collected from well TW-4 and submitted for \DC analyses. No VOCs were detected in the original sample TW-4 or in the sample identified as TW-D. No duplicate samples were collected for the drilling water sampling. 152047 3-8 FINAL H drogeologic Characterization December 2016 North Weld Landfill Unit 3.4 SAMPLE ANALYSES RESULTS 3.4.1 Groundwater Sample Results The results of groundwater sample analyses are discussed in Section 5.3. 3.4.2 Drilling Water Sample Results Two water samples were collected during well installation and development and analyzed for VOCs. One sample was collected from the water tank installed on the drilling rig. The other sample was taken from distilled water poured through the non -dedicated bailer used during development. The water -quality analyses results indicated the presence of VOCs (one quantified result and three estimated - J flag - concentrations less than the reporting limit) in the collected samples. • Rig Tank: Acetone at 2.7 ug/L [J flag, RL = 10 ug/L), Chlorodibramomethane at 0.22 ug/L (] flag, RL = 1.0 ug/L), Chloroform at 18 ug/L, (RL = 1.0 ug/L) Dichlarabramomethane at 1.6 ug/L (RL = 1.0 ug/L) • Bailer Blank: Toluene at 0.23 ug/L (J flag, RL = 1.0 ug/L). The water represented by these samples originated at a City of Ft. Collins treated water source, such as a hydrant. Both chlorodibromomethane and dichlorobromomethane are halogenated methanes that frequently are detected in trace amounts in municipal water supplies and are a byproduct of the chlorinated water treatment process. The source of the two VOCs detected at estimated concentrations lower than the laboratory reporting limit (toluene and acetone) is unknown, but are likely to be false positives, laboratory artifacts, or related either to the water source (i.e., city of Ft. Collins water system) or the conveyance used by the drilling firm to transport water (e.g., water tank). The laboratory data are included in Appendix D. 152047 3-9 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 3.5 HYDRAULIC CONDUCTIVITY TESTS 3.5.1 Slug Tests, Slug testing was performed on April 4 and 5, 2016 in six of the eight wells installed during the Hydrogeologic Characterization. Tests were performed in wells TW-4, TW-5, TW-6, TW-8, TW-9, and TW-10. Wells TW-1 and TW-2 could not be tested because of insufficient water column in the well. A thorough discussion of the testing procedure and results is provided in Appendix F. A slug (i.e., weighted small -diameter tube) constructed of 1 -inch inner -diameter PVC pipe was used in the testing. The slug was sealed with end caps and a lifting line attached to one end. To conduct the test, the slug was quickly submerged or quickly removed from the groundwater within the well casing. The fully submerged (or fully removed) slug produced a theoretical rise or drop in the water level in the well equal to the volume displaced by the slug. An In -Situ Level Troll 700 transducer was used to rapidly measure and record the details (water level and time) of recovery to pre-test levels. During the test, the data were down -loaded and graphed to observe the test progress and to determine when the water table had returned to pre-test conditions and the test could be concluded. "Slug -in" and "slug out" (i.e., slug lowered and slug removed) tests were done in each well tested. Although "slug out" tests often are considered more representative of tested zone properties, the results of both test types were very similar and both tests are considered to have been valid for determining representative water -bearing zone properties. The results of the testing showed a hydraulic conductivity range from about 2.06 x 10-2 to 7.54 x 10-3 cm/sec for the tested zones and are summarized in Table 5. The results showed the presence relatively high permeability material, about one order of magnitude greater than the results field tests performed in groundwater zones for the previous NWLF Unit 1 hydrogeologic characterization. The differences are assumed to be accurate and reflective of small differences in the properties of the water -bearing zones beneath the two units. 152047 3-10 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 3.5.2 Laboratory Permeability Tests Laboratory tests were performed to determine the permeability of natural materials a few feet below the planned base grade (i.e., top of liner) in the NWLF Unit 2. These tests were run on the undisturbed samples from Boring NWE-7 (17-19 feet BGS) and Boring NWE-12 (14-16 feet BGS). The purpose of this testing was to provide data that could be used to evaluate the initial rate at which a hypothetical release of landfill leachate (e.g., the result of a liner failure) could move vertically toward groundwater. Although tests showed the tested material to have a relatively high permeability (2.1 to 5.2 x 10-3 cm/sec), deeper vadose zone layers (i.e. siltstones and claystones) are likely to be much less permeable than the samples tested, perhaps 1 x 10-6 cm, sec or less. The laboratory sheets are included in Appendix E. Boring records included in Appendix provide detailed descriptions of the material between the planned base grade and groundwater level. 152047 3-11 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 4 REGIONAL GEOLOGY 4.1 REGIONAL STRATIGRAPHY AND STRUCTURE NWLF is located on the northwestern flank of the structural Denver Basin as shown on Figure 7 in plan view and subsurface cross -sections. The Denver Basin is a large asymmetric oval -shaped syncline in eastern Colorado, southeastern Wyoming, and southwestern Nebraska that began forming during the Colorado orogeny. The greatest thickness of sedimentary rocks in the basin occurs along the axis of the basin, which is a north -south - trending line that approximately connects Denver and Cheyenne. The Basin includes sedimentary units from. Paleozoic age through Cenozoic age, with the Pennsylvanian Fountain Formation as the oldest sedimentary unit in the Basin and the Dawson Arkose as the uppermost (i.e., youngest) bedrock unit. NWLF is located on the northern portion of the basin that extends into Wyoming. In this area, the uppermost geological stratum, or bedrock, is the Laramie Formation. The regional dip of these sedimentary strata in the area of NWLF is toward the southeast at about one to two degrees below horizontal. The regional dip increaseswest of NWLF with proximity to the uplifted Front Range. 4.1.1 Surficial Strata Unconsolidated surficial soil of alluvial and eolian deposits unconformably overlie the older bedrock units. The alluvium primarily consists of interbedded sands and gravels of glacial and interglacial sediment deposits with minor amounts of silt and clay. The wind -deposited eolian deposits, which thinly blanket the region, are composed of very fine-grained materials, including silty sand and sandy silt. Floodplains near present streams are underlain by sand and gravel deposits. The surficial deposits include the Pleistocene Verdos Alluvium and undifferentiated Pleistocene to Holocene eolium. The Verdos Alluvium consists of interbedded sands and gravels representing glacial and interglacial pediment deposits. There are minor amounts 152047 4-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 of clay and varying amounts of silt interspersed within the sand and gravel. Eolian, or wind - derived, deposits generally blanket the region and consist of very fine to fine grained silty sand. Sandy and gravelly alluvium underlie flood plains of streams in the area. 4.1.2 Denver Basin Bedrock Strata The succession of sedimentary strata from the Precambrian basement to the base of the unconsolidated surficial deposits consist of a varied mixture of claystone, siltstone, limestone, sandstone, shale and conglomerates which comprise several thousand vertical feet. The bedrock strata of significance to the NWLF site and area including, from youngest to oldest, the Laramie formation, Fox Hills Sandstone, and Pierre Shale. A generalized stratigraphic column for the site area is presented on Figure 8. General descriptions of the Laramie, Fox Hills, and Pierre strata follow. Laramie Formation - The Laramie formation is the uppermost Cretaceous unit present in the NWLF area. The lithology of the Laramie is variable, generally consisting of interbedded silty sandstone, siltstones, and carbonaceous shales with thin lignite and coal layers. The Laramie varies from 400 to 1,200 feet thick across the basin, but has been eroded in the NWLF area to a total thickness of a few tens of feet to about 100 feet. The contact between the Fox Hills Sandstone and the Laramie formation is transitional and is considered to be marked at a predominantly marine horizon that is overlain by fresh and brackish water deposits area accompanied by coals and lignitic shales. Fox Hills Sandstone - The Fox Hills is divided into two units, the Lower Member and the Milliken Member. The Lower Member generally is an erosion -resistant sandstone containing occasional thin shale beds and concretions. These sandstones are thinly bedded, very fine to fine-grained, gray to greenish -yellow or tan and are well sorted. The Lower Member in the vicinity of NWLF can be 30 to SO feet thick (Briscoe, 1972). The top of the Lower Member is marked by a two to four feet thick zone that contains concretions that are stained by iron -oxide, hematite, or phosphatic material. The upper unit of the Fox Hills, the 152047 4-2 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 Milliken Member, is a tan to yellow, very fine to fine-grained sandstone. The unit contains ferruginous and calcareous concretions. The contact between the Pierre Shale and the Fox Hills formation is placed at a transitional and gradational change from persistent sandstones typical of the Fox Hills formation to gray siltstones and sandstones. Typical shale strata might not mark the transition in all areas. Pierre Shale - The Pierre Shale, which marks the base of the Denver groundwater basin, overlies the Niobrara formation and is approximately 8,000 feet thick. The outcrop of the Pierre Shale extends from approximately 0.75 miles west of NWLF to the eastern margin of the Front Range Uplift, approximately 20 miles farther west. The Pierre Shale is estimated to underlie NWLF at 300 feet or deeper below the ground surface. 4.2 REGIONAL HYDROGEOLOGY The Denver groundwater basin is considered to be comprised of four Cretaceous -age bedrock aquifers overlying the Pierre Shale. From youngest to oldest, they include the Dawson, Denver, Arapaho, and Laramie -Fox Hills formations. Each of these formations, depending on location in the basin, can be from a few hundred feet to more than 1,000 feet thick. In erosional areas and on the basin perimeter, some or all of the upper formations will be absent. In the NWLF area, only the Laramie -Fox Hills formations remains. Sandstone and conglomerate are the principal water -yielding material in the bedrock aquifers, constituting less than half of the formations. Shale, claystone, and siltstone constitute the remainder of the bedrock formations. The water -bearing sandstone and conglomerate occur as thick layers that extend over large areas and also as thinner lenses of limited areal extent. The water -yielding rocks typically are interlayered with shale. Regionally, the bedrock aquifer groundwater flow direction in the vicinity of NWLF is toward the southeast, as shown on Figure 10. 152047 4-3 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 4.3 WELL SURVEY The Office of the State Engineer's records of permitted groundwater wells in the vicinity of the NWLF were reviewed. The well survey was based upon a search radius that extends approximately one mile from NWLF Units 1 and 2, and included an area of investigation comprised of all eight sections adjacent to NWLF, excluding all wells contained within NWLF Unit 1 site boundaries, as shown on Figure 19. Uses reportedly are for monitoring, domestic, stock, irrigation, and geothermal. Seventeen (17) wells were identified as within one mile of the NWLF Units 1 and 2. tabulation is provided in Table 6. Wells within 0.5 mile of the NWLF boundaries are listed below. • Potts: One deep (reportedly 300 feet total depth) geothermal loop well is located 0.4 mile to the southwest in Section 13-T7N-R67W. • Conoco Phillips: Three shallow monitor wells located 0.3 miles to the east- southeast in Section 18-T7N-R66W. 6W. Two reportedly are 30 feet deep and are screened from 20 to 30 feet. The depth of the third monitor well was not in the State records. • Carter: One deep (reportedly 150 feet total depth and screened interval not reported) domestic well is located 0.4 miles to the east in Section 7-T7N- R66W. • Benson Well South: One shallow (reportedly 25 feet total depth and screened interval not reported) domestic and stock well is located 0.5 miles to the northeast in Section8-T7N-R66W. • Roberts: One assumed shallow (total depth and screened interval not provided) domestic and stock well is located 0.5 miles to the west in Section 12-T7N-R67W. 152047 4-4 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 5 SITE GEOLOGY Five cross -sections were developed to depict subsurface conditions beneath NWLF Units 1 and 2 using the data from the 2016 Geotechnical Investigation of NWLF Unit 2. Several of these cross -sections use 2016 NWLF Unit 2 subsurface data to extend stratigraphic cross - sections that were developed from data collected for the 1992 hydrogeologic investigation of NWLF Unit 1. With regard to geologic structure, Unit 1 is down dip from Unit 2. Geologic strata (in particular, the top of the Fox Hills Sandstone) occur at lower elevations beneath Unit 1 than beneath Unit 2. As a result, the 1992 Unit 1 data were collected from deeper borings than were advanced for the 2016 Unit 2 investigation. These include boring log descriptions for three borings near the perimeter of NWLF Unit 1 - soil boring TH-23 and former wells MW -7 and W-11. Thus, the 1992 data were useful in the stratigraphic interpretation of the 2016 data. However, the 1992 subsurface material descriptions were developed based on recovered air -rotary cuttings rather than the type of discrete -depth samples obtained in each 2016 boring. As a result, the 1992 sample descriptions are more generalized because lithologic descriptions and depth of stratigraphic boundaries were based on cuttings. Nevertheless, stratigraphic and geologic interpretations utilizing both the 1992 cuttings and 2016 discrete sample data provide a reasonably accurate stratigraphic depiction of lithology and geologic contacts across both Units I. and 2 of the NWLF. Consistent with the lithology of the adjoining NWLF Unit 1 to the south, the NWLF Unit 2 is mantled by unconsolidated surficial deposits that lie unconformably over sedimentary bedrock. Many of the soil borings advanced for the 2016 eotechnical Investigation were terminated in the eolian and alluvial deposits above the Laramie Formation. The eolian deposits typically consist of clayey silt and very fine to fine-grained silty sand and were from seven to 20 feet thick across the NWLF Unit 2. The alluvium consists of interbedded coarser - grained sand and fine gravel with varying amounts of silt and clay interspersed within the sand and gravel. These deposits were from 17 to about 45 feet thick across the NWLF Unit 2. The Laramie Formation is the uppermost bedrock formation underlying the surficial materials across NWLF Unit 2. All of the NWLF Unit 2 soil borings advanced for the 152047 5-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit Hydrogeologic Characterization Investigation penetrated into the Laramie Formation. The top of the Laramie Formation underlying the landfill is an unconformable (i.e., eroded) surface, occurring at varying depths below ground surface, and is characterized as a mixture of weathered claystone, siltstone, and fine-grained sandstone interstratified with laterally discontinuous coal or lignite layers. Three of the deeper borings completed as temporary wells (TW-2, T -4, and TW-6) extended into the upper portion of the Fox Hills Formation. The Fox Hills Formation is characterized by laterally continuous fine-grained sandstone across the NWLF Unit 1 and Unit 2 area. 5.1 SITE STRATIGRAPHY AND STRUCTURE 5.1.1 Site Stratigraphy by NWLF, including Unit 2, is located in an upland area, which is covered by Pleistocene -age eolian deposits (Qe) and glacial outwash alluvium (Qv) overlying bedrock stratigraphy consisting of the Laramie Formation (Kb) and Fox Hills Sandstone (KFH). In turn, the Pierre Shale (1(p) underlies the Fox Hills. The permeable sandstones at the base of the Laramie Formation and the Fox Hills Sandstone form the Laramie -Fox Hills (LFH) Aquifer that generally consists of interbedded layers of fine-grained sandstone, siltstone, and shale, with a combined thickness of as much as 300 feet. In the vicinity of NV F, the total thickness of the Laramie -Fox Hills is about 200 feet with groundwater flow toward the southeast, as shown on Figure 10. At depth, the sandstone and siltstone generally are poorly cemented and light to medium gray in color. In shallow depths and outcrops, the sandstone and siltstone can vary from friable to very hard, depending on the degree of iron mineralization (USES, HA -730C). Considering the NWLF Unit 2 investigations, the eolian (wind -deposited) materials at the site are as much as 30 feet in thickness and the alluvium deposits beneath the eolian deposits are as much as 20 feet thick. In the NWLF Unit 2 area, their combined thickness ranges between 17 and 45 feet thick feet. The Laramie Formation is present beneath the entire 152047 5-2 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 NWLF area, including all of NWLF Unit 2. Within the proposed NWLF Unit 2 footprint, the Laramie Formation occurs at depths below natural ground surface ranging from 17 to 45 feet. Where penetrated by Unit 2 borings, the Laramie Formation is about 30 feet thick, but it is likely to be more than 60 feet thick elsewhere across the Unit 1 and 2 area. 5.1.2 Structure The bedrock formations locally dip gently to the southeast. Consistent with the regional geology, the estimated bedrock dip at NWLF Units 1 and 2 is between one and two degrees to the southeast. Figure 9 shows the regional structural contours on the base of the Laramie -Fox Hills from Robson, et al. (1998) with a dip of 1.7 degrees beneath Section 7. This structural dip appears on the cross -sections beneath NWLF. Of note, the hydrogeologic characterization of the NWLF Unit 1 (ATEC, 1993) includes a map showing a gentle dip of bedrock to the northeast; the map is attributed to Shelton and Rogers (1987). The basin - wide Robson, et al. (1998) reference considered for this. 2016 Hydrogeologic Characterization appears to match better with the subsurface data collected for NWLF Unit 2. Five cross -sections were developed for this report and are included in Appendix A. The locations of the cross -sections are shown on Figure 11, included in Appendix A. The cross - sections extend across the NWLF Unit 2, and are identified as follows. • Figure 12: Cross -Section A -A' from South to North - Wells MW -10, TH-23, MW -3, and TW-2. • Figure 13: Cross -Section B -B' from South to North - Wells MW -4, MW -7 (abandoned), MW -12, and TW-S/TW-6. • Figure 14: Cross -Section C -C from Southwest to Northeast - Wells TW-2, TW-4, and TW-5/TW-6 • Figure 15: Cross -Section D -D' from West to East - Wells MW -3, MW -11 (abandoned), MW -12, and TW9/TW-10. • Figure 16: Cross -Section E -E' from Northwest to Southeast - Wells TIN -5/11M-6, TW-8, and TW-9/TW-10 152047 5-3 FINAL H drogeologic Characterization December 2016 North Weld Landfill Unit These cross -sections illustrate a general structural dip toward the southeast. The structure within the shallow subsurface materials, as indicated by the inclination of stratigraphic contacts, is similar to the regional eastward dip of Denver Basin bedrock and the eastward slope of local surface topography. The planned base grade elevation for Unit 23 ranges from about less than 10 feet to about 30 feet below present ground surface in areas other than beneath the soil stockpile. The contact between eolian and alluvial deposits, typically marled by the presence of coarse sand and fine gravel, occurs between 10 feet below and 10 feet above the planned base grade elevation beneath much of the NWLF Unit 2 disposal cell footprint. Beneath the extreme southwest portion of the Unit 2 footprint, the planned base grade elevation is below the alluvium and penetrates as much as 20 feet into the Laramie Formation. Nowhere does the planned base grade penetrate into the Fox Hills Sandstone. Specific groundwater information depicted on the five cross -sections developed across the NWLF Unit 1 and Unit 2 area is a follows. • Cross-section, A -A' from South to North along the west side of the NWLF - Shows the dipping Fox Hills Sandstone becoming nearer to the ground surface on the north. In this area of NWLF, the uppermost water -bearing zone is the Fox Hills Sandstone and is monitored by existing wells MW -10 and MW -3 and temporary well TW-2. • Cross -Section B -B' from South to North along the east side of the NWLF - Shows the Fox Hills Sandstone becoming nearer to the ground surface on the north. The uppermost continuous water -bearing zone in existing wells MW -4 and MW -12 and temporary well TW-6 is the Fox Hills Sandstone. Shallower groundwater is present at the contact between alluvium and the Laramie Formation at wells TW-1 and TW-5. This shallow water -bearing zone appears to be locally continuous beneath the eastern portions of NWLF Units 1 and 2, but is not present beneath all of either unit. • Cross -Section C -C" from Southwest to Northeast along the north side of the NWLF Unit 2 - Shows the apparent dip of the Fox Hills Sandstone to be toward the east (actual structural dip is toward the southeast). A deep water -bearing zone is present in the Fox Hills Sandstone at temporary wells TW-2, TW-4, and TW-6. This cross - 3 The "20 -feet below planned base grade" depth objective for determination of the presence/absence of groundwater was selected to provide design flexibility in the event that a lower elevation base grade is determined through the Unit 2 design process. See Section 1.2. 152047 5-4 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 section also shows the presence of shallow groundwater in temporary well TW-5 in sand at the contact between alluvium and the Laramie Formation. • Cross -Section D -D' from West to East along the north side of the NWLF Unit 1 and south side of the NWLF Unit 2 - Shows the Fox Hills Sandstone dipping to the east (actual structural dip is toward the southeast) and a deep water -bearing zone in existing wells MW -3 and MW -12 and former well W-11. This cross-section shows the presence of shallow groundwater in alluvial sands in temporary wells TW-1 and TW-9. This cross-section also shows the presence of groundwater in a deeper Laramie sand (and lignite seam) in temporary well TW-10 that is not hydraulically connected to the shallower alluvium. • Cross-section E -E' from Northwest to Southeast along the east side of NWLF Unit 2 - Shows the Fox Hills Sandstone dipping to the southeast. The continuous water - bearing zone in the Fox Hills Sandstone is monitored in temporary well TW-6. This cross-section also shows the presence of groundwater in Laramie sands (and lignite seams) at temporary wells TW-8 and TW-10. The difference in groundwater levels in these two wells suggests that they are hydraulically isolated and not laterally continuous. This cross-section also shows the presence of groundwater in the alluvium above the top of the Laramie sand in temporary wells TW-5 and TW-9. 5.2 SITE HYDROGEOLOGY 5.2.1 Groundwater Occurrence Groundwater associated with Unit 2 (see Sections 6.1 and 6.2) was encountered during drilling efforts at various locations and depths, as described below. • Alluvium/Laramie Formation: Gravelly sands and sandstones at the contact between alluvium and the Laramie Formation are screened at temporary wells TW-1, TW-S, and TW-9. This zone is present beneath only a small part of the NWLF Unit 2 area. Groundwater flow within the zone appears to be eastward under the influence of local surface water drainage features (in particular, Coal Bank Creek). This areally discontinuous water -bearing zone also appears to be monitored at well MW -9 beneath NWLF Unit 1. This zone is assumed to be an unconfined water -table zone. • Laramie Formation: Separate sands and lignite seams monitored at temporary wells TW-8 and TIN -10 are not areally continuous beneath NWLF Unit 2, occurring instead as hydraulically isolated water -bearing sands. These discontinuous water -bearing zones appear to be confined beneath NWLF Unit 2. • Fox Hills Sandstone: Monitored at temporary wells TW-2, TW-4, and TW-6. This sandstone appear to be areally continuous beneath both NWLF Units 1 and 2, with 152047 5-5 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit water levels that can be correlated and mapped together across all of NWLF. This zone appears to be confined beneath all or most of the two landfill units. The shallow discontinuous water -bearing strata typically are separated from deeper continuous water bearing strata by finer -grained, low permeability materials, including clayey silts, silty clays, or claystone. The boring records included in Appendix C show the lithologic sequences penetrated by Unit 2 borings and the presence of coarser grained (e.g., sands) and finer grained (e.g., silts and clays) materials. Coarser grained materials usually have higher hydraulic conductivities, typically in the 10-3 cm/sec range, and finer grained materials usually have lower hydraulic conductivities, typically 10-6 cm/sec and lower. Water -bearing strata encountered during the Hydrogeologic Characterization Investigation occur below the planned NWLF Unit 2 base grade level and have groundwater levels that also are below planned base grade levels in NWLF Unit 24. Two temporary piezonneters (TP- 1 and TP-2) were installed in the NWLF Unit 2 area during the Geotechnical Investigation to determine if groundwater was present within 20 feet or less below the planned base grade. Neither piezometer had water at the time of installation, one day later, or approximately two months later. 5.2.2 Groundwater Flow Groundwater level, flow direction, and gradient across the NWLF Unit 2 area is consistent with water levels measured across the NWLF Unit 1 area. Locally, the predominant flow direction in the deeper Fox Hills Sandstone is toward the southwest. • Alluvium/Laramie Formation: Figure 17 shows that flow within this areally discontinuous zone is assumed to be eastward under the influence of local surface - water drainage features (in particular, Coal Bank Creel, located about 1,300 feet to the east). Discharge is assumed to occur as seepage to deeper zones or as discharge to the ground surface in areas of lower topographic elevation. • Laramie Formation: Groundwater levels in the sand lenses and lignite seams monitored at temporary wells TW-8 and TW-10 indicate that the two water -bearing 4 See Section 1.2 for explanation of design flexibility provided by the "20 -feet below planned base grade" depth objective for determination of the presence/absence of groundwater. 152047 5-6 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 zones are hydraulically separated. As a result, the groundwater levels in the two wells do not represent properties of a single zone that can be correlated to determine groundwater flow. A southwestward direction of potential groundwater flow is assumed on the basis of the structural dip of the water -bearing strata and the known flow direction for the underlying Fox Hills Sandstone. Since these zones are hydraulically isolated, any actual groundwater flow will be controlled by the rate of seepage from the water -bearing sand into the lower permeability Laramie strata (typically sandy silts and siltstones) in which the water -bearing sands are encased. • Fox Hills Sandstone: Figure 18 shows NWLF Units 1 and 2 water levels in the Fox Hills Sandstone correlated and mapped together. The groundwater flow direction is toward the southwest. 5.2.3 Hydraulic Conductivity Hydraulic conductivity for the water -bearing zones identified by this hydrogeologic characterization were measured by slug tests performed in temporary wells. The hydraulic conductivity (permeability) of typical non -water -bearing strata present immediately beneath the planned disposal cell base grade was determined by laboratory testing of undisturbed samples. The results of testing are summarized in Table 5. Each of these test methods confirmed the present of material with hydraulic conductivities at least one order of magnitude greater than was determined by similar tests performed for the 1992 NWLF Unit 1 hydrogeologic characterization. • Alluvium/Laramie Formation: Slug tests in temporary wells TW-1, TW-5, and TW-9 provide a range of hydraulic conductivities from 1.4 x 10-' to 5.1 x 10-2 centimeters per second (cm/sec) with a geometric mean of 4.1 x 10-2 cm/sec. • Laramie Formation: Slug tests in temporary wells TW-8 and TW-10 provide a range of hydraulic conductivities from 1.7 x10-3 to 2.5 x 10-3 centimeters per second (cm/sec] with a geometric mean of 2.0 x 10-3 cm/sec. • Fox Hills Sandstone: Slug tests in temporary wells TW-2, TW-4, and TW-6 provide a range of hydraulic conductivities from 1.9 x 10-2 to 7.5 x 10-2 centimeters per second (cm/sec) with a geometric mean of 1.2 x 10-2 cm/sec. Laboratory determinations of permeability (i.e., hydraulic conductivity) were done for undisturbed samples taken within two to three feet below the planned Unit 2 landfill cell base grade. Those tests, which were done for eolian and alluvial deposit samples above groundwater level, yielded values of 2.1 x 10-z and 5.2 x 10-z cm/sec. These values are 152047 5-7 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit essentially identical to the slug test determinations of hydraulic conductivity for the same material, the Alluvium/Laramie groundwater zone. This group of tests confirm that the hydraulic conductivity of silty and sandy material in the NWLF Unit 2 groundwater zones, and in the non -saturated materials above groundwater, are in the relatively narrow range between 2.0 x 10-3 and 4.1 x 10-2 cm/sec. These values are one to two orders of magnitude higher than the average value (5.7 x 10-4 cm/sec) derived for the deep groundwater zone by the NWLF Unit 1 hydrogeologic characterization. The difference suggests that the higher hydraulic conductivities that characterize the NWLF Unit 2 subsurface materials are reflective of variations in the lithology of materials beneath the two units. 5.2.4 Flow Rate Considering the three deeper (Fox Hills Sandstone) temporary wells where groundwater level was measured on May 3 and 4, 2016, a piezometric surface map was prepared that shows deep zone groundwater flow to the southwest, which is consistent with historical conditions for NWLF Unit 1. Horizontal groundwater seepage velocity in the water -bearing zone was estimated using the following equation: V = (Khi)/ne Where: v = groundwater velocity, Kh = horizontal hydraulic conductivity, i = hydraulic gradient (vertical change in groundwater elevation/corresponding horizontal distance), and = effective porosity. Ile The calculation uses the geometric mean horizontal hydraulic conductivity of the Fox Hills Sandstone of 1.16 x 10-2 cm/sec from 2016 slug testing, estimated effective porosity of 0.20 (GMP 1992), and average hydraulic gradient of 0.003 as estimated from the northern portion of the groundwater contour map that is NWLF Unit 2. Based on these estimates, the 152047 5-8 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 horizontal groundwater seepage velocity in the actively monitored zone beneath the facility is approximately 180 feet per year. By contrast, the Fox Hills Sandstone flow rate estimated for NWLF Unit 1 groundwater typically is about 30 feet per year. The order of magnitude difference between the estimated flow rates beneath the two units is the result of the 20X difference in the hydraulic conductivities determined for the two units, 1.16 x 10-2 for Unit 2 and 5.7 x 10-x' cm/sec for Unit 1, and the steeper groundwater flow gradient for Unit 1. Both differences are reflections of the variability of the lithologic properties of Fox Hills Sandstone beneath the two units. 5.3 SITE GROUNDWATER QUALITY Groundwater samples were collected on May 4 and 5, 2016 from each of the eight temporary wells and analyzed for volatile organic compounds (VOCs) and major anions and cations. A non -dedicated submersible pump and dedicated tubing were used to collect the water samples by the low -flow purging and sampling method. The results of water -quality analyses were used to develop the Stiff and Piper diagrams characterize water chemistry and natural spatial variability for the three groundwater zones. These water -quality data are summarized in Table 4. The Stiff and Piper diagrams are included in Figures 20 and 21, respectively. The laboratory reports are included in Appendix D. 5.3.1 General Water Quality Stiff diagram depictions of major ion chemistry in water are constructed by extending three parallel horizontal axes on each side of a vertical zero axis. Concentrations of four cations (Na+K, Ca, and Mg) are plotted to the left of zero. Concentrations of four anions (Cl, HCO3 + CO3, and SO4) are plotted to the right of zero. The ions are plotted in the same sequence and are presented in units of concentrations of milliequivalents per liter (meq/L). The width of the pattern is an indication of total ionic content. The Stiff patterns provide a relatively distinctive method of visually depicting differences or similarities in water chemistry. 152047 5-9 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 Piper trilinear diagrams are in the form of two triangles bracketing a diamond -shaped plotting field, as used by J.D. Hem (USGS, Water -Supply Paper 2254, 1985). Each vertex represents 100 percent of a particular ion or group of ions. The composition of cations is indicated by a point in the cation triangle, and the composition of anions by a point in the anion triangle. The coordinates at each point add to 100 percent. Anions and cations are combined to plot in the diamond -shaped field. Trilinear diagrams aid in data evaluation by providing visual depictions of trends or a comparison of differences in water quality between wells. The Stiff and Piper diagrams show variations in basic water quality between, and within, the three groundwater zones beneath NWLF Unit 2. These zones and the sampled wells within the zones are as follow. 1. Alluvium/Laramie sand. [1W-i, TW-5, TW-9) 2. Laramie sand. (TW-8, TW-10) 3. Fox Hills sandstone (TW-2, TW-4, TW-6) 5.3.1.1 Alluvium/Laramie Upper Sand This shallow discontinuous water -bearing zone is present beneath the east side of Unit 2. It is described as silty sand with clay, or fine to coarse sand with gravel. Temporary wells TW-1, TW-5, and TW-9 are completed in this zone. Water quality generally more mineralized than the Fox Hills Sandstone, primarily based on elevated magnesium and sulfate. It is a magnesium, sulfate, and bicarbonate -type water, as shown on Figure 21. 5.3.1.2 Laramie Sand This areally discontinuous water -bearing zone occurs as isolated bodies described as silty sand, siltstone, lignite, and claystone. These Laramie sands were deposited in a coastal plain environment, including swamps, small rivers, and coals. The more permeable silts and sands deposited by small rivers are encased in less permeable clays, and can produce small amounts of groundwater (Raynolds in CFWE, 2007). The sand and siltstone within the unit 152047 5-10 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit are likely of limited lateral extent and therefore contain groundwater because they are more permeable than the adjacent lowly permeable claystone. The water quality, based on temporary wells TW-8 and TW-10, is similar to the Fox Hills Sandstone, primarily based on calcium -magnesium and sulfate -bicarbonate. It is a calcium -magnesium and sulfate - bicarbonate type water, as shown on Figure 21. 5.3.1.3 Fox Hills Sandstone An areally continuous water -bearing zone described as clayey, silty sandstone and siltstone to dense sand and sandstone. These Fox Hills sands and silts were deposited in beach environment and are more laterally extensive compared to the overlying Laramie sands (Raynolds, 2002). The silty sand and siltstone is present beneath the entire site. Temporary wells TW-2, TW-4, and TW-6 are completed in the Fox Hills Sandstone. Water quality in the temporary wells ranges from less mineralized (temporary well TW-6) to more mineralized (temporary well TW-2) (Figure 20). It is a calcium, magnesium, sulfate, bicarbonate -type water. (Figure 21) 5.3.2 Analytical Results 5.3.2.1 Volatile Organic Compounds (VOCs) Groundwater samples were analyzed for Volatile Organic Compounds (VOCs) by USEPA Method 8260 B. Detections of VOCs were: • TW-1. Tetrachloroethene at 5.8 ug/L (reporting limit 5.0 ug/L), and • TW-6. Chloroform at 6.4 ug/L (reporting limit 5.0 ug/L). These are wells in locations up -gradient from the active operations of NWLF Unit 1 and neither VOC detection is attributed to the landfill. The chloroform detection in the well TW-6 sample could be attributed to a water treatment residual in drilling water obtained from the City of Ft. Collins; however, the well development process was intended to remove water added during drilling and well installation. 152047 5-11 FINAL H drogeologic Characterization December 2016 North Weld Landfill Unit 5.3.2.2 ajor Ion Chemistry Stiff diagrams of the groundwater samples are shown in Figure 20 and trilinear Piper plots are shown in Figure 21. 5.3.3 Comparison of NWLF Unit 2 Water Quality to Regional Water Quality Typical water analysis for the Laramie -Fox Hills Aquifer is described as a sodium bicarbonate type with elevated total dissolved solids (TDS) ranging from 200 to 2,000 mg/L, and overall poor water quality for human consumption. According to the Colorado Ground Water Atlas, the higher IDS concentrations occur in the north and eastern margins of the Laramie -Fox Hills Aquifer. Present groundwater quality in the area is considered poor, and exceeds the Secondary Maximum Contaminant Level of 250 mg/L. In addition to TDS, sulfate is the other constituent that makes the Laramie -Fox Hills poor water quality for human consumption. The presence of sulfate in Laramie and Fox Hills water is expected, based on general statements from the Groundwater Atlas of Colorado (CGS, 2003): • Water in the Laramie -Fox Hills tends to be a sodium bicarbonate type with sodium sulfate dominating along the northern and eastern margins of the Denver Basin. • Sulfate concentrations in excess of the drinking water standards occur in areas including the north -central margin south of Greeley. • Elevated sulfate concentrations are reportedly in part due to the association of sulfurwith coal and other organic material present in subsurface material. Local water quality of the NWLF Unit 2 is more mineralized although lower in sodium and potassium compared to regional. From subsurface samples described from the NWLF Units 1 and 2 site investigations, lignite and organic clay are present at most drilling locations that penetrate the Laramie Formation and Fox Hills Sandstone. Sulfate concentrations exceed the SMCL for sulfate (250 mg/L) at all five existing monitor wells for NWLF Unit 1, and in six of the eight temporary wells installed at NWLF Unit 2. Temporary wells TW-5 and TW-6 have lower mineralization compared to all other Unit 1 and Unit wells. 152047 5-12 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 6 FINDINGS & RECOMMENDATIONS 6.1 CONCEPTUAL HYDROGEOLOGIC MODEL The Conceptual Hydrogeologic Model for NWLF Unit 2, as shown in Figure 22, is based on the findings of the NWLF Unit 2 Hydrogeologic Characterization and existing information reviewed from past Unit 1 site characterization efforts. Strata of hydrogeologic significance beneath NWLF include Pleistocene (geologic age) eolium and alluvium deposits, underlain by weathered and unweathered Cretaceous Laramie Formation sediments, in turn underlain by the Cretaceous Fox Hills Sandstone. The surficial eolium (wind -deposited) and alluvium (fluvial or water -deposited) materials are comprised of silts and fine sands, with sandy gravel characterizing the alluvium at the unconformable contact with the underlying Laramie Formation. The Laramie Formation is comprised of non -marine, fluvial claystone and siltstone (clays and silts, where weathered), representing deposition in a low -energy coastal plain environment, and discontinuous fluvial sand and sandstone layers and lenses that were deposited in meandering channels within the coastal plain. The Laramie Formation is underlain by the Fox Hills Sandstone, which is comprised of massive sandstone layers, intermixed with shale, deposited in a nearshore marine environment, possibly as beach or barrier island sands. Shallow groundwater beneath NWLF is observed in the three stratigraphic zones, the uppermost an areally discontinuous zone present locally at the contact between alluvium and weathered Laramie Formation, typically associated with the more permeable gravelly alluvium. The next deeper zone where groundwater is observed includes areally discontinuous sand and sandstone layers within the Laramie Formation. The deepest continuous groundwater zone significant to NWLF occurs in the areally continuous Fox Hills Sandstone. Alluvium/Laramie Formation: Groundwater that is present in the gravelly alluvium overlying the Laramie Formation and in the uppermost, weathered portion of the Laramie occurs beneath the eastern part of the NWLF Unit 2 area. Groundwater flow potential within 152047 6-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit this areally discontinuous zone appears to mirror the eastward slope of surface topography and be toward the lower elevations along Coal Bank Creek. This creek is the local discharge point for shallow alluvial groundwater. Groundwater within this zone is recharged by infiltration of precipitation through the vadose zone where discharge is laterally to Coal Bank Creek or vertically, by seepage, into the underlying Laramie Formation. This alluvial water - bearing zone, where penetrated by NWLF Unit 2 borings, ranges from about 5 to 20 feet thick. The hydraulic conductivity of this zone is estimated to be 4 x 10-2 cm/sec, based on slug tests. Laramie Formation Sands: Groundwater that is observed in this zone occurs in discontinuous siltstone and fine-grained sandstone lenses, and lignite/coal seams, that are interbedded within the dominantly fine-grained bedrock (i.e., siltstone and claystone) of the Laramie Formation. Therefore, observed groundwater exists sporadically within the Laramie Formation in isolated water -bearing lenses or seams that appear not to be hydraulically connected. Groundwater flow potential within this zone is assumed to be southward, in the general direction of the structural dip of these sedimentary strata (Topper et al., 2003). Groundwater is recharged by infiltration of precipitation through the vadose zone and by seepage from locally saturated portions of the overlying alluvium. Discharge of Laramie Formation groundwater occurs by vertical seepage into the underlying Laramie -Fox Hills Aquifer. The water -bearing lenses within the Laramie Formation penetrated by NWLF Unit 2 borings range between 1.5 and 7.0 feet thick. The typical hydraulic conductivity of the Laramie Formation's discontinuous water -bearing intervals is estimated to be x 10-3 cm/sec; however, as the water -bearing sands and sandstone lenses (and saturated lignite seams) are fully encased within lower permeability Laramie Formation siltstone and claystone, the effective hydraulic conductivity is that of the siltstones and claystones is much slower, estimated to be 1 x 10-6 cm/sec or less. Fox Hills Sandstone: The deepest occurrence of groundwater of significance to NWLF Unit 2 occurs in the Fox Hills Sandstone. This sandstone is an areally continuous zone that underlies all of NWLF Units 1 and 2. Groundwater flow within this zone is southward, in the general direction of the structural dip of these sedimentary strata. Groundwater within this 152047 6-2 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit zone is recharged by seepage from overlying strata and by lateral migration from off -site areas where the Fox Hills occurs at or near the land surface and is directly recharged by precipitation. Discharge occurs by lateral flow and by local pumping. Vertical discharge into the underlying Pierre Shale is assumed to be negligible since the hydraulic conductivity contrast between the Fox Hills Sandstone and Pierre Shale is approximately 4 orders of magnitude. The full thickness of the Fox Hills Sandstone was not determined by NWLF Unit 2 borings, but is estimated to be about 200 feet based on NWLF Unit 1 wells and regional information. The hydraulic conductivity of this water -bearing zone is assumed to be relatively consistent across the NWLF and estimated to be 1.2 x 10-2 cm/sec, based on NWLF Unit 1 slug testing. 6.2 GROUNDWATER MONITORING Groundwater monitoring will be performed to satisfy solid waste groundwater monitoring requirements. The proposed well network and associated groundwater monitoring plan for NWLF Unit 2 will be developed and approved by the Colorado Department of Public Health and Environment (CDPHE) in the future and prior to any solid waste acceptance into Unit 2. In some instances, the temporary wells installed for the 2016 Hydrogeologic Characterization could become permanent monitor wells. In other instances, the 2016 wells will not be important to groundwater monitoring. Anticipated groundwater monitoring strategies pertaining to each water -bearing zone are provided below. • Alluvium/Laramie Formation: This zone exists only beneath the eastern part of the NWLF Unit 2 area and flow is presumed to be eastward toward Coal Bank Creek. This zone is not considered to be a viable water source for domestic or agricultural use because of its limited areal extent between Unit 2 and Coal Bank Creek. The single water well (see Figure 20) present in this area is the Carter well, a 150 feet deep well likely producing from the Fox Hills Sandstone. The construction of the landfill cell (i.e., liner and final cover) is anticipated to eliminate some or all recharge to this zone. • Laramie Formation: Saturated sand lenses and lignite seams are monitored at temporary wells TW-8 and TW-10. These lenses and seams are not areally continuous beneath NWLF Unit 2, occurring instead as isolated water -bearing sands and lignites. The direction of groundwater flow potential is anticipated to be toward the southwest, mirroring flow in the underlying Fox Hills Sandstone. However, these saturated lenses and seams are encased in lower permeability Laramie silt and 152047 6-3 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 siltstone layers meaning that lateral flow is restricted. These lenses and seams are assumed not to have a direct hydraulic connection to shallower or deeper groundwater (i.e., Alluvium or Fox Hills). Groundwater monitoring is not anticipated to be required for these isolated lenses and seams. • Fox Hills Sandstone: This deep zone is present beneath all of Unit 2 and is monitored at temporary wells TW-2, TW-4, and TW-6. This zone is continuous beneath NWLF Units 1 and 2. Temporary wells TW-4 and TW-6 are appropriately located for up - gradient groundwater monitoring and could provide background groundwater quality information for the Fox Hills Sandstone for both Units 1 and 2. As the groundwater flow direction in the Fox Hills Sandstone beneath Unit 2 is southward toward Unit 1, future detection monitoring of this groundwater zone could be provided by existing Unit 1 monitor wells MW -4, MW -5, and MW -10. The future Fox Hills Sandstone groundwater detection monitoring well network for Unit 2 will be determined at a later time. However, as noted above, some of the existing Fox Hills Sandstone wells that monitor Unit 1 could be appropriate for incorporation into the Unit 2 detection monitoring program when it is developed. 6.3 GROUNDWATER MONITORING PLAN A single Comprehensive Groundwater Monitoring and Reporting Plan that covers groundwater monitoring for the entire NWLF, probably as an amendment to the present Unit 1 plan, ultimately will be developed to incorporate Unit 2 and monitor wells associated with Unit 2. 6.4 WELL CLOSURE Pursuant to Rule 5.2.31 of the Colorado Water Well Construction Rules (2 CCR 402-2), a Notice of Intent (NOI) was filed before drilling the monitoring and observation holes and Well Construction Reports (Form GWS-31) were filed within sixty (60) days after drilling. Copies of Form GWS-31 are included in Appendix C. Monitoring and Observation Holes must either be abandoned in accordance with the Colorado rules within one year [or 18 months per a recent rule change) after construction or they must be converted to a well by filing for a Monitoring Well permit. If abandoned, Well Abandonment Report (Form GWS-9) must be submitted within sixty (60) days after 152047 6-4 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit abandoning the hole. A decision with regard to abandoning or converting the temporary wells should be made by March 2017. If development of NWLF Unit 2 does not begin prior to that date, it probably will be advantageous to WMC to convert most, if not all, of the temporary wells to permanent wells. The temporary piezometers installed within the Unit 2 footprint did not intercept groundwater and are not considered to be wells. However, they do extend to depths below the planned Unit 2 base grade and need to be properly abandoned (e.g., filled with granular bentonite) before landfill cell construction. Their locations have been marked in a manner to reduce the likelihood they will be damaged or rendered inaccessible for final closure by farming or construction activity. 152047 6-5 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 7 REFERENCES The resources and literature used for preparation of the NWLF Unit 2 Hydrogeologic Characterization report is as follows: Aerometric Engineering, Inc., (1992), Surface Topography, North Weld Sanitary Landfill, January 1992. ATEC Associates, Inc., April 1993, "Hydrogeology Site Characterization Report, North Weld Sanitary Landfill, Weld County, Colorado", ATEC Project No. 41-17238. Briscoe, H.J., Jr., (1972), "tStratigraphy of the Fox Hills Sandstone with Some Comments on its Suitability as an Aquifer, Greeley Area, Weld County, Colorado", Thesis Paper 1456, Colorado School of Mines, 1972. Colorado Division of Water Resources, Location and logs of wells within one - mile radius, Office of the State Engineer. Hillier, D.E. and Schneider, P.A., 1979, Depth to the Water Table (1976-77) in the Boulder -Fort Collins -Greeley Area, Front Range Urban Corridor, Colorado. USGS Miscellaneous Investigation Series, Map I -855-I. Raynolds, R.G., 2002, Upper Cretaceous and Tertiary Stratigraphy of the Denver Basin, Colorado, Rocky Mountain Geology, v. 37, no. 2, p. 111. Raynolds, R.G., 2007, Typical Well Log for the Denver Basin, in Citizen's Guide to Denver Basin Groundwater, Colorado Foundation for Water Education. Raynolds, R.G. and Raynolds, M.L., 2004, Bedrock Aquifers of the Denver Basin, Rocky Mountain Association of Geologists, v. 41, no. 4. Robson, S.G., 1981. Geologic Structure, Hydrology, and Water Quality of the Laramie -Fox Hills Aquifer in the Denver Basin, Colorado. Colorado Department of Natural Resources, Hydrologic Investigations Atlas HA -650. Robson, S. G. and E. R. Banta, 1995, Ground Water Atlas of the United States - Arizona, Colorado, New Mexico, Utah, U.S. Geological Survey HA-73OC Robson, S.G., Van Slyke, G., and Graham, G., 1998, Structure, Outcrop, and Subcrop of the Bedrock Aquifers along the Western Margin of the Denver Basin, Colorado. Colorado Department of Natural Resources, Hydrologic Investigations Atlas HA -742. 152047 7-1 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 Romero, J.C. and Hampton, E.R., (1972), "Maps Showing the Approximate Configuration and Depth to the Top of the Laramie -Fox Hills Aquifer, Denver Basin, Colorado", U.S. Geological Survey, Miscellaneous Investigation Series I-791 Shelton, D.C, and Rogers, W.P., (1989). "Environmental and Engineering Geology, Laramie and Weld Counties, CO. Colorado Geological Survey Environmental Geology Publication 6. Topper, R., et al., 2003, Ground Water Atlas of Colorado. Colorado Geologic Survey, Special Publication 53. U.S. Geological Survey, (1971; Revised 2013), 7.5 Minute Topographic Map, "Severance Quadrangle", 1:24,000. 152047 7-2 FINAL Hydrogeologic Characterization North Weld Landfill Unit FIGURES Figure 1: Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: Figure 7: Figure 8: Figure 9: Figure 10: Figure 11: Figure 12: Figure 13: Figure 14: Figure 15: Figure 16: Figure 17: Figure 18: Figure 19: Figure 20: Figure 21: Figure 22: December 2016 APPE DIX A Site Location Map Topographic Map of NWLF Unit 2 and Vicinity Site Map and Hydrogeologic Characterization Investigation Locations Land Use of NWLF Unit 2 and Vicinity Topography and Surface Water Flow Patterns and Water Features in Vicinity of NWLF Unit Detail of Topography and Surface Water Flow Patterns of NWLF Unit 2 Location of NWLF within the Denver Basin in Plan View and Geologic Cross -Sections Stratigraphic and Hydrogeologic Units in the Denver Basin Structure Contours on Base of Laramie -Fox Hills in the Denver Basin Regional Groundwater Flow Direction and Saturated Thickness of the Laramie -Fox Hills Aquifer in the Denver Basin Cross -Section Location Map Cross Section A -A' Cross Section B -B' Cross Section C -C Cross Section Ei-D' Cross Section E -E' Groundwater Flow Direction, Upper Laramie Alluvium, May 2016 Groundwater Contour Map and Flow Direction, Fox Hills Sandstone, March and May 2O16 Permitted Water Wells within One Mile of NWLF Units 1 and Stiff Diagrams for Temporary Wells and Monitor Wells, NWLF Units 1 and 2 Piper Diagram. for Temporary Wells and Monitor Wells, NWLF Units land Conceptual Hydrogeologic Model 152047 FINAL ADO QUADRANGLE LOCATION LEGEND NWLF UNIT 2 USR (895) NWLF UNIT I ■ 0 Y4 h 3�� 1 inch = 2,000 feet 1 Miles 1 Copyright: L 2013 National Geographic Society, I -cubed WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO. INC. PROPOSED NORTH.. WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO SWIFT RIVER FIGURE 2 TOPOGRAPHIC MAP OF NORTH WELD UNIT 2 AND VICINITY 2190000 E r 215o5OO E 2157000 E 2165500 E 46O5O0 N 1 y-` f ref I J�f t 1- r 459 0OO N X PPINE-$7TP1.. PIT TQF tit! F 4.57500 N ax J / a� �1 r Ji rye : N \t5� 5� <%/ / �� 11 \ 5 F 4 /rr'��' �^.�.�'jJ �''' �'ti' `i ,� 'r�•l ? / ;ivJ/ j/ -�` l �r�`r•-r Y ti\. �� i f �r `ice (6 ,f <'� -`�-�lJ/r'r P I f , r ! - �' %x ` ___sr 1 'I �� l ! 1�l r/;2 / r ces- cif I 4564O'0 N 41, s I I t 3 I• A . r I F Hi 1 `...i; 'f _ft" _/_ + F fir 5100 _ • r I I'•. I I—'• TP-i E PIT -1 OP -i6 SHALLOW LARAMIE WELL DEEP FOX HILLS WELL OR ABANDONED HELL PLANNED UNIT 2 LEACI-IATE COLLECTION SUMP EXISTING INDEX CONTOUR EXISTING UN -IMPROVED SITE ROAD •GEOTECHNIc:AL BORING SHALLOW TEI:1PORAR`I` WELL DEEP TEMPORARY WELL TEMPORARY PIEZC'METEP. TEST PIT GAS PR OH TOPOGRAPHY AS OF FEBRUARY 21, 2016 300 TRUE N•OR1H [I 300 E.Co 9�iI SCALE IN FEET WASTE MANAGEMENT DISPOSAL SERVICES Dr COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO FIGURE 3 EVER SITE MAP AND HYDROGEOLOGICAL CHARACTERIZATION INVESTIGATION LOCATIONS FIGGW 4W4!4 PROPOSED NORTH WELD f t. SWIFT RIV.ER FIGURE 4 LAND USE OF NWLF UNIT 2 AND MCINITY C �•' r yz •rs i �__ ti ti s S e� f Ur e ` �, C-,----- ��.1_rt at !^mot '.GYP i'Fr� — - - - - aY r er r. u r t s r .IS r� "2\57 Yrtea e }f-l� I / -C. �J •.� � � ;.2.l II ;iiiT:li M 1/4 2 3/4 1 inch = 2,000 feet QUADRANGLE LOCATION `--'.'� • er ,,i "'yF}' V * It f[74lb _ a O••'e^n _ �`.-'5`es * y ��..,-,— _ li �.�- ` n _ as•`ee '+ h5 r ! ti_ Mina .r< Jf fr' JJ iii la,� Yer e��Cl t....4<liesse....-s• __ • wir-ire;IS-L.. lg.) a it ° 1 lifs Cr yyry-'�-{•��••r--�. a ' _�1.. , r-. ,rte _ fir• rf � Cin_. ".\ + wCfr f O } t .rte 7 P - + �j •_ l - l,[ .4._.:" ,ice AID $ ,G a !L1 , 1 a" .2' _._g i Pi .•Y f { ,, �d 1Ff ' r ,,:�.y' rte'"vi... r� - "Z�. ,aT'�`�fq.. _ ..+✓ ,/(}) j" —_- f' J .��' Pm"r tikf. ... — r �� Z.-/" i*i. e a• P . /'� l 7�� ' .. }.e+ ai--- '+`1 ��• r • _�..r _ rte, - X.'.r - �f9 . ~` • . _' r! { w �._ ? . NWLF UNIT 2 USR (895) NWLF UNIT 1 j . _ . _ .. _ __�Y .r -�rrJJ U P` Y fJ�..-c._ �r f' •ry"�"� 111�� ?.A s'IJ' T.,., 17�� / i _ ! !<T."--`-1 �-" - _ 4.. f_—�� rrr' _ • \..te.•.... 1 e1F . /t ii � �� • �. rr....:. r 1 - ��f l�' � ' - , ' Pk M1Y:p �...+yl :c! ,. erre \'‘•-___,1%.„.N. Is�+yr� e�, a n,_..e .,.r.^...,�. :eY - ' •1 r: •I rr�rute ri �� ..,J rte , f� '. ' •lFiF J tom• k •~ �.. _ • f _.f s ^iii — �--�L�,...�. f � _ w• r _ - L.��"+_. n .wL�r-s.+. �'�va 7�Y,ode t•y • • _ y 1 R J .. r' l-.1� f, ! _ ' 1�' 1`-- "�sr! "rte ae� fplj� --e/J rL� • r a'�` --"'----a- {, 1p �� t. rfJJPlf .-. 'f:dC.-sit 1 :7 _�-`_ r". WSJ ri _ —f_"�— .11/— Neetili )Illraain 7.1 }liSue l ti * — •:...i..gT{7 -_ L. r .ek ,;, ?r•"'�,� I. WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO. INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO sp. — ' 1� ��E.r 1• t S* ;CA 1: r`'' -r, . . ,, r 3 f y OrrLY.:." .f �� t` r - ¢ .P ° ,� • 0,x:0. rl:.. rn 31! 'S33iAd3' H3A1}J - ,� •_ •' • y) I " _ astir O.--; * f. - - y r ti$ tMw ' - J PO }' ... T J _ �. !I .. - ' '� • - •�'; fir} �• _ _ _ ._� Cs' _ _. _ .C. --�. FIGURE 5 TOPOGRAPHY AND SURFACE WATER FLOW PATTERNS IN VICINITY OF NWLF UNIT 2 E stliegit:itt alert -e....."..\. e III _a- l 41 it r..."*.' s 1 s _ ~ 4t `��---� 114 , +' "'+ I A w f rI.' _ 19�.• +• .�-r '"O R Ce NJ Q 1 W z CO PT 0 J w D 1� •laliC''' � _�--- �yb r7 `C a c ~` QCD e� ern`, I_ 2190000 E 2188500 E 2187000 E 2185500 E IC aT 450500 N 1 459000 N i N / i 7 •"ere. / / 1-• 1f 5 457500 N J I' •. I \ 456000 N — — 3 .r //14 i r - \-Q d! r LEGEND • • NWE-'1 TW-1 TW-2 a -ALLOW LARAMIE WELL DEEP FOX HILLS WELL OR ABANDONED WELL PLANNED UNIT 2 LEACH ATE COLLECTION SUMP EXISTING INDEX CONTOUR EXISTING UN -IMPROVED SITE ROAD CEOTECHNICAL BORING SHALLOW TEMPORARY WELL DEEP TEMPORARY WELL TEMPORARY PIEZOMETER TEST PIT GAS PROBE AREAS OF CONCENTRATED FLOW POTENTIAL TOPOGRAPHY AS OF FEBRUARY 21, 2016 z TRUE N0R1i- 300 O 300 500 200 SCALE IN FEET WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO FIGURE 6 .swicra RVV ' WATER TOPOGRAPHY PAT TERNS (DETAIL) SITE ■ S gal B -Icoc rums• _ rk0C _ d1,rb 0000 a Foal A 7400 — s Girl] 40Ca Girrvar Fwtlyljls•l -1000 —/ _ 3000 Antpu1h00 Formalim ^C —.0- Laramie Felmuitian F0K RNIs 15ancldona arei r� �l- r s+arniawE� 0Cb Castle Rack CongIcmorntn 2 Arn pekoe Farr IMn - Lareinle For .lillt Km‘•mrlian ssar.tlniur a l ati Y Joilcel exegaernliun x 20 1.' 10 Z MI Figure 6.1-3. General geologic cross sections through the Denver Basin. Line of section is located in Figure 6.1-2. Vextf trU htIn 1400600. 11107 Foot 7000 elm fa000 .rO1iO MOO FROM; Ground Water Altos of Colorado (Topper et al., 2443, Page 86) WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO FIGURE 7 LOCATION OF NWLF WITHIN PLAN DENVER IN GEOLOGIC CROSS -SECTIONS � Unit Saturated Era System Series Stratigraphic Unit Thickness (feet) Physical I Description Hydrogeologic Unit Thickness (feet) Hydrologic Characteristics 4, NI lgacer� Casfle onglo Roc I er t 0-50 rine lo coarse a,rkkosic conglomerate - sand None Noneand Exposed Mrs dills; forms cap rock on buttes; weli drained, does not yield water Basin Aquifer System Water fable aquitier bn shallow units, and confined at depth. = Eocene ciii Tertiary Transrnissivity from • ranges KO -5,000 storage Sandstone -lr�ra�� e pla�r��ea and conglomeratic 0-400 D-1 coefficients range iron i r specific vary _002-0.009'; yields ,.20Id s dston wilts intort�Qrf�ied ..� — P'Ileotene E'�rrrleti�n from 15-25%; domestic water source and municipal supply slitstone and shale for Castle Rock; 3O0 may yield as Much as ypm -' Steele, silty claystone, and hater table aquifer neer outcrop area; generally confined; interbedded least of Denver Basin aquifers; transrnissi ►ity sandstone; permeable Denver 'e ira O 5 M lignite from 25D-2,0OO ❑.002; $00-1.000 beds of and carbona- ranges gprlirft; storage coefficient F armation ceous siitstcne and shale specific yield 10--17%; domestic and municipal water common source; up to 200 yields gpm Water table outcrop area; con - aquilier rear generally Sandstone, fined; Denver Basin conglomeratic most permeable of aquifers; trans- Arapal�t3€t �_ - _. y-- i:, _miesiWit�+ 0-400 sandstone, and interbedded ranges from 500-54OOG �gp�l�''Ft; storage co+r�Fti- ' �Ot�---�`i�0 IFprm�lfan and siitstone — dent 0.002-0.009; 10-25%; shale specific yield principal equpfer Upper for to 700 `si pper� source municipal water; yields up gprn Cretaceous•� -..-_,..:_-_._„::.,......___- _ - _: _ ..a, ` --- -_ r 4 - •w.• .. _ _„_._t_._ in — -. --_-_- ... - _ G IL ..93.1 1_6__-L_-�..-LS�__ -Y ■■ter -UT:- - •j 3111 , L C _ _ -.. - J ..a_.-1- >. _ - -.4a_.,“._-_._._ • • 1 _ l i S S_ 1_�_r4�lrr�y�4L.� LS►it+.ii_.iYe iwil `... .— _ - _ ct M. l a_W: S -.L calcareous, silty, and PierreShaleShale,, � dtrise. confining unit: 0 ImpermeableImpermeableImpermeable'X00 Matthew train fit bson nr7ti Banta, 1995 Stratigraphic Unit of WAIF Unit 2 WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, VELD COUNTY, COLORADO FF' (Tapper- �._'C`:'1: ' ? if :.�l.i C t =l d _ , ,+'C.7 f �I� , `'flH.7)3, Page to Ot Colorado k .� 5W � T RIVER ER FIGURE $ STRATIGRAPHIC AND HYDROGEOLOGIC UNITS IN THE DENVER BASIN i I l SITE ■ LARAMIE- FOX H LLS EXPLANATION Poterltonatric ccintnut, contour In:cmrral 200 loot almoners of ground water FFICtilemont Eal;arl et aquifer.. Danver edtfin t,olinicsacy =r tJ ►rAf 1.144.01_ J•L or _troy a 104' \ ea IN _ ^ it I, h Pd — --`y Pi N s rr� rt 0:0 I E L n..it--M. t lo+• 40' tti - at Mudllknj Irvin Rubeon and aenta, 1413 FROM: Ground Water Altos of Colorado (Topper et al., 2003, Pages 87 and 89) EXPLANATION DIr11ver Basic boundary Saturated Thickness 11813'11 0-100 :•a -400 4lk SITE ■ LARAMIE-FOX HILLS 105: si 4,- , Cabins -14,, .‘ L /t ti IMEH " �� ar- 7 r ti; A1'n f tPrilr4 Aid ITQyr a seas _ 111.r I Mwt.a 1 t 4. P 3 V' MndillecI from RnSoon aid Banta. 101* WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO FIGURE 10 REGIONAL GROUNDWATER FLOW S FT RIVER DIRECTIONS AND SATURATED ..._ THICKNESS OF THE LARAMIE- FOX HILLS AQUIFER IN THE DENVER BASIN 2190000 E J ,....---../f r i/I 2187000 E t 46' 1500 N 1. a • 459000 N r r / .fir• - -~. •5 I ( f 4.1 17 45 500 N \,Il.... TH-23 (abed 0 455000 N J /I f f` • I / f• a II / 5100 A' LEGEN t NINE -I T VIM A SHALLOW LARAMIE WELL DEEP FOX HILLS WELL OR ABANDONED 'WELL PLANNED UNIT 2 LEACHATE COLLECTION SUMP D(ISTING INDEX CONTOUR E%IST1NG UN-IMPRDVED SITE ROAD GEOTECHNICAL BORING SHALLOW TEMPORARY WELL DEEP TEMPORARY WELL TEMPORARY PIEZUMETER TEST PIT GAS PROBE CROSS-SECTION LOCATIONS TOPOGRAPHY AS OF FEBRUARY 21, 2016 300 z TRUE NOR1H 0 SCALE IN FEET WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AULT, WELD COUNTY, COLORADO .1•1141.111.: MYrPR CROSS-SECTION EL0CATION MAP O SOUTH I b NORTH A E7CISi1NG GROUND SURFACE 597Q- p ,-. �1 'mil - ^ t\ �� x�� rJ1 Yr ��z fr--L-r \ _ ti (PROJECTED P5C') MW -.3 T4G ELEV 5154.56 GL ELEV:5148.1 _.. i 5" 60- r�--1-'xr- -~~~- 511j�1 ---r.' `'ti PLANNED BASE CRNLiE UNE r i : 1_• 'J (PROJECTED 125•} -0- p --515O - •��k OL ELEV:5733.9 - ..--' _ t ` CLAYEY SILT --� f� -� TV -2 TOC ELEMSt3R.1 5'141;- i t ' yti �1 }� xy GL ELEV 61 5.5 _ MIY-10 7 CLAYEY SILT AND CLAY -_-_�- - 4 cccc - (� — TOC ELEV! 5126.96 GL ELEV. 5124.7 r r — r / i v - IN D AND GRAVEL, ACE ORGANICS -- — [9 AWN' RH T �_ 51 �.i ' _ r —SILTY -SAND-FINE--T'6-"COARSE: M14 —GRAVEL 3U rr - f _--_ _ -_ _E - — r ~. L � FILL { — '�Ar'IDY SILT 1 CI AVFY ' T 5120 - ,— J -y - 12'0 =SILT - � --- Q v SILTY SANd WI SILTY CLAY LAMINATED CLAYS:J(1.1E. IRON STAINED — rl„ .e--�1 _ �� 511D 'Ai -1H _ - KL SILTY SAND WITH UAL � _ _ -- CLAYEY SILT .. : ° ° ;:- SILTY SAND GLAY_'�11'a .:5IND$'Tb - 1" CLAY LAYERS, IRON STAINED. MOIST _ SANDY SILT ; :y' . .::' :.•, . _ �y 51CID •' .. i•.':' 514O - _ CLAYEY SILT MT -I WRY RNE SAND SILT. TR acES OF Ci..J. l '' r . - r ' : ' •,•"�. ; c" ., rte,.- i:• 'ti, ' - ,, .. ' "• ' SILii{ aANDS?ONE.' CEMENTED, MOIST :_-.:r 'a • _ i( --510'90 5090 - _ ; ;, :_' SILTSTCNE SHALE " }: - _-� ;:�, `- ..... ::. ':" c , ..' - �Sy4�JD:$Tra�]E WCC �_ .ELATED HARD CLAYSTONE — — CARBCNACEOUS SHALE ;, C I_ 5. :':. SQ$Q _ .' Q''_ J�G'uC' • ..,:-..t - — _ SANDY SILT SILTSTCNE S91d ;CL4S , -- ?"....e..--' ',r;.'.`.:;. s + •�:,' ':��'; Er' % - . ; S• �'•'_ , r. 1.,y,' '.` ; . `' ,.• r•V. -' ' + • .I" ` Ir:.` ...,,:`1 •11'•' . `.. — — DENSE SILTY SAND --5hl^1:: 5D7D- —, _ — ._:,, SHALE WITH cARBONACEOl1S LAYERS :' • , -_�'; :t, ;r "' '• :. + t,IP r.y 1 i . :''. LAMINATED SHALE ;..'' , '•'•y-• `•.-, ' ' ''' ' — )ENSE SAND WPM Rll T Ftir �.i- f, Fri r "" r :• ::,'e'' _ LAkiFiA'.l A.Yli7QhYE n.1kL :•EANp$TON '' I{ _ _ w. . ' _ QF09SiL3.-. • .�" .T' ..`-:i- .C(•�1�r.+�Uf1N�. �C'`rS"�f]�iF•,: �1''" :.r:�'. —505O • �_ 5a4Q '•7.• '� • .. - : ;,:.•.-, r., •.'�-'`": is �.n: ` - k.., .. .:' ..t..,. ti' '.'' :1''" :r'` '_ ;-.. :.;. SHALE CLAYSTONE f =e.,..:• f _ ' r "•.1'" • •'r...'F: `'. ''+ - . _, �•'..''' ". L frkjlNAiG,Q• SA1ID�TCIQE:'4?�D�{FFL•` ` ; t :l ,4 .. _ :_ n.':.?::'"v. v. 'ti 5.". DENSE :ANC?_TDrdE - 504O :, ..,. r._ . - :.. .. . ti a. ,' a. 1 ' ;.. : :.; .. .. , . ..: C- . , _ _ ..ti , +�; _ 'n ' .:,,:�_ •_>:.�:� ` �,::'. '. ,.' :��'�; :',;.� VERY NEB Y DENSE SANpST4 _ 5O30 ,,., _ .. '• Y. •:r• ,' , I , 5030 =:•;',: ,.:' ...;: -".r':•• . . RNE. SA7�G71DC1E• SIG1`3?1y1E 46R�111V7` ' :', :;•%••••,-'.''' ','; ARd CLAYSTCNE _ - ��bERY: ":S`7• .x•4•.5 .. 7f •°-.• .'' _• _ _ '.: - :•�:' n.:'� 5021:• � 5020 .- ) ��50�5� _ • ��•-if y� • SILTY BAND _ �( irk•• .s.•�`.' } • ev :•.-•-•..• '.' � .ti :'ra : •ti ; u ,'. .�a,. , .r�: � 'r 't • ': =• `-r `"�- 'ti 5010- -'T-•--•r.. ti •!� I'-' ...r•-. ,'":...... V •-• nM - •'" - .•:::--_' SHALE.----•,..-- -`-'-' 'r, :.'. , -_--` - _ 5,�-ax : x.. �� n' � %129.0 -L'+4A1►41 :::'.: _•� -. 5. 'T .1Vi5$`FirE. BEIiE1Ep; 3ANPSL9 LEF:'`/'�C]hTltL :'., :�5 :. .. ..yr •• T, Li Ati 5000•-., :x.• 5 - ..-. ' - , .. - J - A • ` u - -.. 5 "- "J , ..•1 •_.:c ''1: — - L - '•-1\' !•• ..'-. ' s - ,ii .."JIV ,, �• — - . •. 'I o ..-' .J.. `�: . .. .-'. 1a�J ., .',•: .'�- l - ..1- .\-a•, :'•i. 4993.5 3 1 18 L�r { I f 1 /•• .. r S ,r ...... - .a. cf. 4 :r i... _ - a.' ,. •. �_' ',...' ld-:. ti' 5•:': • Vim. '.. _• __ �' .y., �' 1 49 JL! r��y t . . .a' r .. y ..., .. --., •- :r. r ....- r ' r•� :;.• .f , _ • , _ .. . , . .' e r: 't� 7 —— 49$D _ 4980 v•. ::r — — - i. - �J 49�D �.' r �.. _ '.� -. ' '.r .' - l' �] f� �r7%51 r J• S'• ' - _ :i _ — r• s c . J — _ _ _ — _ TO:159,5' — 49e0 —_ 495Q_ SHALE WITH HARD SILTSTIJNE / SANOSTGIE — 495O _4954 494D 4930 4940 _ — _— SANDSTONE AND SHALE — TOc304,0'(484-4.1'MSL),PLUGGED BACK TO 15Q1aa' _ —493O 4920 492O LEGEND: .. ..1. ... �.. • , . �.- '� 2C' 0 2r..fJ 440 NWE— 1 eatechnical Baring-:;•:-...' :'.:.,•,•.. _ • •. , •:.. Predominantly Sand anal Sandstone i 4 ..---_,,.a._:..,- V _,.-- ..,:or ap-r4-. .-__•-- ' ;ti .,r6iE: 1-= CI:1 Wrd . y.. r T.. —1 Temporary Well I. r./s' peat J , x-. is !` fi.� ,; 'VERTICAL E:':r SEE?r.Tl'::f'I OF 130 i .- { # - 'Jf'.I.r_ Y. . ...AV; •�y NA IN Existing Monitor Well \.---% = Planned Base Grade (WM 2012) ; ti ; , .-�l-, t4 -3 :iir• .� ~�• K i El - ,-�ay..• -a-. . r -w. _ _• WASTE MANAGEMENT DISPOSAL SERVICES CIE = Quaternary Eolian j,, r .e; ,.i. "rti �,5I 'I ' ,� OF COLORADO, INC. :- :i.5.;,. ... �� _ IP xlhp"! .;,/,-.-:,f;. .4.-`'. :r‘,14 .-ssa-r PROPOSED NORTH WELD LANDFILL UNIT 2 I III = Quaternary Verdes Y ,, - Grail Le•�,•el I:Marc-h and Ha•e.:, 2:::111,,1 a;` , `'` a..'I'1'l..�C sd.:1,;-` r! 'r ;' °� ''^'' -: • :`;,. 1;_' I+': AULT, WELD COUNTY, COLORADO sis: .- .. sI.-:,.:•cd!..J' -• - •.' I'''> 4� = Top of Cretaceous L'jrnmie Fprmption 'i S7. ---r rT 'a},., - liC ---------------- _ K FH = Top of Cretaceous Fox Hills SandstoneCROSS—SECTION -_ __" = Erosional Surface Well Screen See Figure 11 Far Cross —Section Location NOTE; See boring records for detailed description of subsurface material SWIFT RIVER rev on.,rq ono, ono v,qq 5. r 1 C niair FIGURE 12 A —A' JUNE � 1 :SC:IILITH X1.17 .1 , B ur r. {7 0 N 'FTH B L1.1 h" -- - -517n S1 ii-i 5150 5>150 514''" - F 1-}I I 51 30- t - I I, _ 1 i f t -g 12.. CI F11i J r 1 1 ` x•120 r- .-----� L Tw-Dt {PRO.ECTED 255') TUC ELVA 5195.5 k W my? -7 (ABANDONED.' r GL ELEVt51025 _ x•11 511'x- • (FP.OJECTE9 1.`1. ? i7 ELE••:':5093.6 e —k r Jr ��— 1 J MW4-12 (PROJECTED EICO TDC ELEV_e69T.3 _. t} r,{ �1 }+ST1N6 GROUND SURFACE LAMED 2iP,$E GRADE LINE ^--�—��-- - —�--- N 1 5.t ELEY:5CO2.5 - �:10C� r —' `-,. l -� 41 �.� J ' MW -4 ��—� ti r SILTY CLAY •.- i`+ i�f ~`- - - - - (PROJECTED 30&5, 0.3 i 5 TOO ELEV:5079.5 V 5079 - TOC ELEV_ 50$1.58 + -------------- - - GL ELEV:ra077,0 ` ��509C-- ~ ` GL ELE5. GL ELEV 5076.8 -r- - F,^5j,� - �f 1 CLAYEY SILT ��-�' -t - ' - r• r r r SAt•1D1' ALT ti � - rte` IX.AIEY SILT �V�` - -1----� -----� � -- - - - -_ ril'JY- r it f- D WITH GRAVEL - fs ��t_ �s 5080 ~�--� _ - _—_ CIE-k�r-1 r - -y^� _ = SANDY 5ILT ----- - ` QE SILTY SAND = - - SILTY SA NQ --- SILTY CLAY fl7� F.i17 _ter Qv Sat'Io,TRFrCE5 OF GP..4'•:EL SILTY `.',SAND YdT-I SOME (RAVEL '::,•..�',�'';.••',.•_._.•'-:.-'.:�:.,'.:•4-`.. e•: •' :.; r' -TVI-1 SANG k .z.:�; GRAVELY SAND Y 1H SaiE SILT SANDY SILT SILTY CLAY — _ �I'IFr� —STfFF-ZIJiY �• SILTY SAND 5[sF.':_ J_ JL k_ -_ti - = S7L�lf s'Ai'iD 5�• '_7(5/ {,}v .- S) -_ -_ , CLAYS:TCNE - `-. _ C0SC- �•• .:.:'-..`y'-._...,'�4,' }:: ... i^;LA'i E7` ULT Tll'A44' _-.. — 5C35Ci ' 3 ]i �•i., t, Aci SAND WMiH GRAVEL _ , .tisies''bF�{iR SNxLE •—•—• CLA �.±� F: CLAYSTaNE AND ORGANIC SHALE ti� 5 - m so 4 ` �f � 040 ) ;_- VEY SILT . SILL rTrf!E TWk�5 SANG DENSE r'. � l 87.:::a•..;.; ram . • r . ; • , — _ LIGNITE ." �l'15,S 1�� `•1 ' _ ��•. d1� - U4•IITE / i3`✓AL rJ r. ; SANDSTONE - 1.�5F]C51. . . — �! I -ice LIGNITE TVI—U 5029.1 .y, •. CLAYEY SILT { 9LTSTGNE — ^ - - •: _-- o. "`•_ •r� •.. SILT5TQFIE AND %LAYST4NE f nit — — — — 3/1 1•E — — t..�T. : .. '::. •-: E�.,��, 5•'• .. •:✓`s.�:T�•r -``�03C' '•�':.', -. - .". ;•.t.'..r-.be: 4"ilGgIBlIVt�.a °'•::. � :" • �: ' ":` —_ SANDSTuNE SANDY SILTSTONE '• '.', .r-= _ �.,.:;.,r SANDST_NE _ :::",..•-:_ *•ti-.: RJ•ti..•..•,•':'"• :. �:.�.r:..•'•:;•"•.n .� :.UL�. +; .. a .r.:_ ; `:`^.r '.:• ti ". `. —�JD � LIGHI1E AND ORGANIC SHALE SILrSTONE ALE AND LIGNITE ti ti ,. . _"• . J,..:.: .. • ::; L — ; �;'• . .i ; _ ,,•,.L - SANDSTONE LJCNITE / DOAL �1 — SII Pm-INF . ,,r.�. tea` `A• C _mod _�. .rJLJI❑ T Jam_ }z •. tea. x._ : 5'•x.5.-• .:: 1 • _ � ` — �1 SHALE AND SILTY SANDSTONE � •:` '--;- LIGNITE -- �hI Ll1`r �� CLAYEY SILTSi4NE AND S{GIDSTCNE SHALE HARD CL 4 f5TONE _ 00� • titu• tie , •- 5k-r:Y. ALe:. -i*" SILTY SANG t _ 4990- 1 990 - - SHALE WITH ORGANICS I - _ GNIM./CSOAL — SANDST7NE — - -__ SHALE MTH IN ANOST6NE 49rCJir -- !1LTST1UNE c 'HALE WI — CLAYEY. SILTY SANDSTONE AND • _�9`'`l' !'..r--• '!-•.'1'.--.1:•'--e M $ S filil '-"� ''•5•: -}:,• ' '. •':,;` -',r"'•• •: ''J'1 '- SILT/ MA5rE''i SANDSTONE 1 70:11S.0r�5i '.'•�:.' 'Jti '._". _ •5• "'+::..'•, ••{;:. — ,' .• _ '. .:•5. SILTY CLAYS1Ef E -.,.. ..::Z— T.-, 497' • • 4y, _ — �SILtI eaO1NQ5:TONF,i-•16.Y1i2A.5 1E JCJ' L'AkUNATsDiliSOING: i,NITE ,r. } ...: �fi:1 — .•4.?;•: ; ' ..`.., 4960 _ 1 R.V„�I..iDe'dll_•}.�J �_::5 TD:12F.�u' � .9' _ 496.0 :.. :..: - : flog -M 1E'a1J1i1: a6:1111; 61J $H : -::::; ' 4940_ :,:• ti. :'=' _ ,. ,k�. ' _ 1-940. 4$30 --1930 _ — SILTY SHALE: LAMINATED; EICTURBATED, TRACE FOSSILS --1920 4910_ 490{? —_ _4910 SANDSTONE TRACE FOSSILS TD:264.0'(4Q15,e'MSL), PLUGGED TQ 115.0' 1900 LEG EN Da — — _ _ Soo a IC $:o hd'111E-01 Geatechnical Baring _ �• -_ = Pr-ed-d rrlir,nrltiy Send Ond Sandstone I t•- }� Iso ; I+ERnCAL MODERATION Ohl # 13X J' li c• •,t. "• y Y-.1_,14► >;1:- 1 •ty f, • Tat' -1 Temporary Well i ,AL,,:j•F�?s ,r. "== / = Planned Base Grade (WM 2012) t':i +' Existing Monitor Well -- i?`rEz n" :� it—�{ r _ �as::. • #; 91 �',-_� '-- ": - - , , WASTE MANAGEMENT DISPOSAL SERVICES (lE = Quaternary Eolian� .':1•'.1/4"1".%): OF COLORADO, INC. i -a`4 Nisakv p, ' ::. +;J"l. ;:ti ,..- - - PROPOSED NORTH WELD LANDFILL UNIT 2 � ..v = Quaternary Verdos Gt-our1�•5+'rifer Level (M-oroh and May, 5416-) z-'=' :` F....-0-03,-..` ;3. •' T , : AULT, WELD COUNTY COLORADO _ J i .% 4,.; _ r.. ,'4 ; :::.11.M5'45'... * fir' 'L = Too of Cretaceous Laramie Formation 1_, *-mss ? s - • - > ! ti K��{,�/j�L�{(f/ %EH = Top of Cretaceous Fox Hills Sandstone •1Atell Screen See Figure 11 For Cross —Section Location NOTE: See boring records for delalled description of subsurface material vl,rt3n�i^.,9 �r �, , FIGURE 13 CROSS—SECTION B —BI JUNE 2016 -e'er- = Erosional Surface SOUTHWEST - o ;� w NORTHEAST 9 c 51sa_ _5150 -I -__ TW-2 TOC ELENA 5139.1 - 514 _ �, _ 140 -CLAYEY---51- ALL -15130 _ q 5130 - �E 1 0 - x ----\--------, SANDY SILT `-\x --- - 5120- Ro -512O �,��L�� 1 EGTE0 575'0 TCe ELEV51128 GL ELEV`.5109.8 5110 v - SILTY SAND WITH CLAY -� -1 `�� _TOP SOIL �11 _ y PLANNED BASE GRADE LINE _ 51 , CLAYEY SILT 100 - - 1 �- _s TOC ELEVV 5080.3 _ 549 _ _ - - _ CL ELEV!5077_0k _ 0 0 !w _ ��_�4__-�-- - -- 4x4 T1M1�-5 - SILTY SAND �'`�� _!-'`• � �`�-�' x �` TOC ELEV:5D7B.5 GL ELEVl5O7B.3 — 5080- �'� �4 k X060 � — — DENSE SILTY SAND • • • - -- � WITH SAND LAYERS SILTY CLAY , � �-•...., 5070: X070 — SAND ~�� _� DENSE SILTY SANQ SILTY CLAY ,y • l 5061 _ ,• ° -, •':�" , 060 t' .:, .:.- ' : : : .<.. ' _ -' :: > _ ;: ;.:' :..< _ ON. — ,' f' �1..', .. �. _ ...-ter. •; i. •: •,.w; — - .. _ MEDIUM DENSE SAND WITH SILT - 505� ,•,.: ; . : I , _:, .,.:. :.; ;.= ::, _ _•.'' .. _ 050 — .. :, .. f :, �N 5 •:. _ <' ..< ,'",: '.. '•e ' f TN GRAVEL — ;Q ?S':5' •. ^.J. -7,•....:•:'..z::.... •. ,("_ " • •� Y% '. any � b•`— � Y 5040—•-�.5�.�_ .' ' ' _ _ _ _ _ =; r, ,' .} . —.+_ } , —r, � -c.i'. .--.p. i-�� . .. ,?� a - .�.5040 �,' :>•a.: '.�•';. , .V •• .. - ' ,ll-.' : �::" ,. TW-5 SAND DEN ADd4 = M�4 .;•Y�ft1tDEAlS•':fi1N =• - ... .. ;.: - _ - •- :c>.•:::::•:1.1.•:11.-11::::"‹....c..1'' T. .cG�t}1L,y'y1ED a �:':'. :-≥514'T� SAM0 _ '. r ' ` •..L.-....... :'1 -... ' '' , T1W $ 5429, '.� $ •L.: ' m 1 1Jhy'' ,:• ..: _....._ .a _.,,. -.. .L ...:.. r - -'•_ r '.4. L 1 ti .. , r .. ti a '-.-r-•�`7 : .. , .• - ,• 1JyI '/�1 . _ ' - - _ :.( - 'c--_ - pr . . _ �:•' tom.. �'•• 5 - ' .a '-. _ • i• �"••' lr :� v. • a ... L .... • • .. •l +. Cl'NU M1Y''l 1TC1 .rV'• —" ... 5a2e ..,.. _•• ..' . •.•"L ` _ {'':i _ 020 O �• tIL\•4'�WY�C i.., •.: .a : , .: -;. ';'i' �'.ti. .a� . ,•:.. - = :.:- - .••_: •'...: ,:., .: '. 1'... >..` -: = .' :•y ' JJi : • - • SE SAND. DAMP 5011.0 `/5/J3/J187 t� , c _ 1: _ E _ T. 501 .:. n • :: . ,.. :'�.: ;; • 010 V , a •. ....,.' ..- Ala .r.+, te al �,• ... 500 e �:•••:•••-•...--..... J -.,.V-:: •:.-. _ .';' -• • --..' !-•1: Z.4 }:. :;. 000 — - 1_. . .: -.:.l.•:: ..: ... /. •; ':•I - •• .`. L.' :....• i �• :• .. < • •, • :...L : -•^ .•- . : ,.: '' ..::. • - •. � • `. � �- • ,ti • fin: - a,: t , .a.. 1.- �.. :•K:' - .6„ - , a': ' _ ::.� HARD CLAYSTONE :-]..r-..r f,, x'1.' •5.:- -.-. ',•'- -d• :.1.� 'v-T.i -. =.. •,'e •,},'-- y/ — ' 990 4890pp _ n`[a=,--�+t'-.!'-.- •-:y'--••r-• " �-- ..., - - � n ..:_. -• ---' - '•'�'.-` -• ti. r. a .a.. S .l. 1. Lr: , -. L. .. •,,::[ i.. L. .. -,.. -.. a -.. ... '. 5' . .. -. ... . , .C" - ♦ .- r.'� - - _ ..'a •.L: �. ,`Y • - 'y• _ ` S. a, ,,L'. ,,i' _ .J•� — 9.7L! a ,...`-•` `•'�+-.; --F-. ,r /} �j 4•i�Lj- • •, J"" '�.L' r+.'' jK'' 1.'•- .-�� J:.-. ''.. �w :'1 ' �j fj 4:-, ..- .. ?' •;'''' . •f , -• ;v• .-1 a .. ...•�.--••••:••-.,':.- ' . ' L 'r,,. •. ' - •;•- ' 'ri�iJ .�1 . _ }::•- ! 1�1: V. • .i. n T. .r;.a : -A as i .. _ L :. . •L:'•- - ; :' "'> ;, � — —:.. . . _ ... - ;:: •' : -a:= ,'I ...'=,-!•;:-.-.•:--;::•:—..:'•,.'.'.•. ".: ; .: , -,.,.:,: �9 /iNDSf1-LVE„ - _ • • ..N5a ..•-.". — 497 ,.. • "";a. a -fay • 970 e _ 4960 TOE 109 or — JI 960 _ —4950 4950— 4940 X940 _ 4930 _ 4920 _ 4930 —1920 _ 4910_ 49O0 =-4910 49OO LEGEND: _ NWE-01 Geotechnical Boring a. a. -. �.o noZOO 103 =.�`• --•i• = Predominantly Sand and Sandstone -•-• ::.. ..,: TVs+ -1 Temporary Well = I + :• - • — � r;i k SaLE 1'-200' EX VERTICAL AGGERATION OF 13)I = Planned Base Grade (WM 2012) �Tali':+aemzege�'-,•t• MW-3 Existing Monitor Well ___/ . : :J tL, I wee ° : r :, :. WASTE MANAGEMENT DISPOSAL SERVICES 1st=.AgL �o■esu ' •. -:-J 11 •—.� OF COLORADO INC. OE = Quaternary Eol ian �]7gItq�*�j .4 ilk Sne511 pppp;€� '' - •' .• a PROPOSED NORTH WELD LANDFILL UNIT 2 0_:• iii ■ --tat j ,, l I 4 ��I =� AULT• WELD COUNTY. COLORADO V = Quaternary Verdos T Groundwater Level (March dnd May, 2016) I %;' V ; <�•`' �''r� pl tii.l '-'�+i- 3''iI Ir -III• '!�1I� , Al:ir' = Top of Cretaceous Laramie Formation =�3 ,, : F.1.1 $dh a 1 y- L - =•- PS ' Malt/. .. o . Well Screens ^'t��'�; FIGURE 14 _ It4i�., J ...1.... 'am KFH - Top of Cretaceous Fox Hills Sandstone See Figure 11 For Cross —Section Location SWIFT RIVER ,� CROSS-SECTION C -C' JUNE 2016 NOTE: See boring records for detailed description of subsurface material kx = Erosional Surface WEST 51 F30- "-z D. -z. ci al LL I-LI �, .,EAST '80 ..-51 - 51 70- 2 NLEv_21 J17'',' _ r' 8 - MW -•3 ` rN 1 x _ r,r_, ItiNE_y PROJECTED 2501 ! —'--... ELE:i:F'1L50.5�'\, ?Si n[t TOG ELEv:5154.35 - , ': 160 6L ELE1+ S148.1 f _ ��--. - _ 5150- —rr STOCKPILE —X-- N_ E7c1STING GRONNb 'SURFACE ti , �h -5150 `---_ _� - k ` f. f 'ti--•,. r CLAYEY SILT-� I CLAY AND SILT-` / ----- rJ� �k �'~� 61 � 'L.. 51`x' MW -11 (ABANDQNED ~� rf f — FINE/COARSE SAND ��r �1-r�{--� I INTERBEDDED SAND 0 GRAVEL {PROJECTED 425'] it ELElh517A_D II --mula_ I6' 14 51 30- x5130 CLAYEY SILT Y _ STOCKPILE PUNNED 5ABE GRADE LINE %. Ef- 512U 120 ' ---____ HARD CLAYSTPNE TW-1 _ - LAMINATED CLAYSTONE, IRAN STAINED -� (PROJECTED 400') 501.5� _ Ll�tllTE -�- SI SAND l x'110 -_-__�_ GL ELEV:51TOC e•,'�':..,:'" - _ --- ��.� MW -12 k -4110 _ •SAND;STANE,4411-1•t•'': •'•ti= LAYERS: IRON STAINED, MOIST �_ TSTCNE v (PROJECTED 125') RAISED } - Tok5994,3 1 — '' ",' ''' �~- ': • DENSF SILTY SING 6L ELEV 5D92.5 4� DEw5E 5rlr♦D 4' ~� _ '-t-"'T- - :!slltti<-titwE,":fig Y CEMENTED. MUST -- SILTY CLAY ti. - NWE-19 Sri90- -:. ` .. :'- • .- - TONE 1 <.• ti .:.i .. TO: M.O. " �" •�� CLAYEY SILT �`__-_ _ TN -10 -5iJ`aLI _ _ ':' N Ei:iM1E D ONE -� CLAYEY SILT ��9 GAVEL �� TOG ELEV. 84 GL ELEV:5073.7 GTCC L I:LE :554757 - 11 J ' ' ' SANDSTONE SANDY SILT S4FF Y SI LT `x - SILTSTONE WITH SAND ---~ --- •: �"� SILTSTDNE _ ----J -� IJ, LI- TD' Boo' '=-: SILTY SAND _ lI - L 1AlIJ..7EC SHALE ^TONE GRAVELY SAN `_4A�,§E,SIL7(.:'.'-'•1� FlRM,LAVEY SILT_ SILTY CLAY SILTY CLAY u.060--- • ' ,•:-.I. ..5957•'. • t7JrXa1)x CLAYEY SILT .706'0 LAMINATED CLAYSTQNE WITH SANDSTONE LAYERS; MI(RCFOSEILS UGH' �Y AYEl` 7LT = - •. • ; : �� Sl �Y SILT CLAYEY SANG CLAYEY SAND Fri 5� • ,I Y $nTEia i.. _• : 050 ti U .,l 1_- Llfilal _ t s I- _ ,. :••\',.' AND GRAVEL - Fri< . do . . _ .:•] .iustr 5FNQ TOME►, r..lp :, • ' . W4= _ rc r: ;.. '# 41 40— rti: a` 04❑ ",r '. •; :'. 'v: 'J(13�1°'f3 , t ..1 • .: v - ' '''':. _- .. s.y'• `Y ."_t�' .: ,,' `' SILTY CLAY (ILLEGIBLE) VL1ti:G6t,y4L'• , •f::...:•',• .., !�. • - ,•• :: , _ ..A{-``, -Ly .`r' i'`'• - ..ter. ��. FF�y 7-,.'I _ - •- •\••i•-rte •'•FVNC •• •; �.II '• `,�. ^' �• •-,u •. "' 03D - ,.-:'•' .,5 �. r ��a.�p y uh ` '': 'Y ' 4-.: .l '� ��ttttttttttttt~T'i�l�� _ , . _ r.' -.-r'•!: i — •,•-;.._:J'., .4 -;: �. "� r' ' `!i' ;•,�. :r.• _ Il - - �.'' :A - ':. >. ;.. :.; y •; _ TO; 47,0' STIFF CLAY _ .r•.. c_ •� :'%':' `cam F - -- — - SANDY • - •''. .r .,y3'. �1I-5 :.C.• '• - ter:. wAnna. (Ef1�iA) PN 1D 5020 �21� —$-'��•s ,:r-- .'' •.;.;......---••:...,..,-.."......---f.:_..... .... --, - -; , .. ., : � •.� :�; :-,r _�-.•.r- .:..•••.-,.r_._- - .:- •-,,.•• y _ - - -. :-.., :..A r: . - ''•-''' •- '•vd� SHALE FIdG - —_ "-�r-•. :•r,...;� �:•1..:,. • �. �.:,. ':;.f,',;:. ;:f•, - - ��:.. .'�;, s • • - -•• `< �ITSTONE SILTY SAND c0''i0_ �. `"` ':.a _ ti•• ,: r., ..:'} - 'ti$t$N9S7ONJ —CLAYSTONE -5010 • -:„.•, _•-. LIGNITE Q� ��7f3VN�i,y,TlP'SIL�Fr=_- :, ,' ,= 1 •':-•+r•�'.'.. AIL NE SAND - ••::. ;,MDIAITE>3 ia 1A:'�': • • : a. •n"� -',�'• ''y — _ -••r'•':, •.;. _.-:. -• � .�• • ._ .. SANDY SILT _ r, �•: �••,— 500D—m:n, �.::.: •• ' .,'� - .••' : .". • [•.`:.., .i - _ `;.r. - -. -• . . .. • , •.. - ,?:... _ r^,1r�r•, 5°C5D • • • r/ +� ' ••_ ::"r' :: SHALE ,i -..'-': 4: '-�=.'.• ''=��: , :s"'- r- DENSE SAND KITH SILT -T0�7]�a.191uIEiF5,P-1$�:-..a:',�;.� .•�• �.: -Jvi'•" ' ` ''•t...; • ,'..{; •�''•'� :1'C '..•'� � •t'. - .-- r. , ,.l. .-.:-,,f• •.5, •.•... :.., : - r.' „••: LIGNITE - 4490 .-; '.r J!.. .. .., :... at r ' i : ti ':�'.'ti •? ., - --49' 1111 .- /a s+,. ,:- - ...:' ..,If _.r'.. }: r - - a' _ 4•; y•.4 ',.r ' ••, :, • -••a:''' 'SHALE ��• ' +'7rlA�' tr , • ANICS(ILLEGIBLE)— :�: .-x • a:'•::. SILTY Sarin WITH CLAY' _ :::::....0: >; ,:' ,. -.. - :. : r, — ALE Pc ,... 1-:r.. TCNE --.j-Q^.!-1 49c0_ •:,•-•'....,:..r''- •:� •w':-.''-• .. 5' - CLAYEY. SD_ IY SANUSIONt'Idl}'5119• .••r:' ' •' �`5'n ::•. • ., -:. s--.--; ''4a — HARCI 5AHCI'STCHE — 'ham 1_.. �• f',� P •-u!'_ •r.- _ Tol'I'I%A' - —•.." 2 `,- TD: 99.5 �.-��..,:. .4970 - - ---- �, •:�,. 51LT5TbNE KITH CEMENTED LAYERS • -• -K Al_ •-. :. •_ v: 7' IC. r,. :r.19. 1,,..:t-'...!•-•".;-....-1 7 _ "1_ t.L`- ` ..�:. 5 TD: 1 a' _!' ��:,-. a. �'°-'mac. •ti '' �'.; �• •t;' .•` - -. k + 49(_; 11 - 1 �' .: - '•• Vii,'_ :: ;511i ra•L (1F H 6' $JLi'9i, '-7: VA DI , `' • x..,:,, _' ,'.: _'.: -;.; 1 1'- '-1-•1 i.� .. 11 Ct_ 'i.�j u +. , . !,: ,.l- ._r ,.!`-..rti - _ ' Y:.. fir: j� I "-4- ..r•' 4940 ~ -4944 5440,5113.1E- 4930 4920— -493.0 4910 _-4420 -4910 _ - 490❑ SANDSTONE AND SHALE T0:394.D'(4e44.1'MSL),PLUGGED AT 159.0' - -1900 LEGEND: -. -. -. _ 0 203 KO ;,..::;.:a ; ". J • NINE -01 Geotechnical Boring :`,=,.,:,+— — - Rrid '.•r= ' .... = r-edr,rr-lir�dr�tl� gand Sandstone j + -- •�' SCAB 1' -ADD' VERTICAL EXAGGERATION OF 13X TW-1 Tem ordr Well Ir":•: : : reY6 � rti • -- = Planned Base Grade �'vti 2012) }'= SB'.ft Existing Monitor Well MW -3 \---,/ -MIA i+ -.a I -- ssin�: t r ::-�=-aster: - e: IT%: „3.:.;„1.....) QE :<<;_�I-.rte;.: `iw � �S; ;'.v i:.,+A5TE MANAGEMENT DISPOSAL SERVICES = Quaternary Ealldn 'Iratal ••;�• • 1 r ..•OF � COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 i ►;�' :.: 11'" : .�.�4.'��,s ,' s� :l' AULT. WELD COUNTY. COLORADO V = Quaternary Verdos Y Groundwater Level (March Mays 2016) ; :', ' and t.,`..4N. •, .; i;! 1 '1 :)r I - <I = Top of Qrnt peaua Loren -Ira FOrmption I i ,e.i" �— FH = Top of Cretaceous Fox Hills Sandstone Well Screen See Figure 11 For Cross —Section Location , IFT ,R I VE LYNONYCN Vat S1 91••Ff I: Li r. FIGURE 1 , CROSS—SECTION D —D JUNE 2016 NOTE; See boring records for detailed description of subsurface material ter' = Erasianal Surfdce - NORTHWEST m r - Fri 4990 _ - N WE —01 TW-1 MW -3 QE QV KL KFH 5100 5090- - SOUTHEAST Es TW-6 TOC ELEV:50BD.3 - GL ELEV:5077.0 5080- r _ SILT CLAY 5070- SANDY SILT 5060—_ -co TY Garin Ole 5050 wkNI) NI IH I+HAVLL KL Tw—s TOC ELEV:5079.5 GL ELEV;5076.3 SILTY CLAY SAND 'MTI I GRAVEL 504Ct:LENSE SAND. MOIST CLA1'5TONE WITH SAND 3/16) t:'3ILTYi5AND-.., .;..; •--• — 5029.7 (5/,/le) :; _ : �•-. PLANNED BASE GRADE LINE _ Tr8 s l � {PROJECTED 75'). TOC ELEV:5a77.8 _ GL_ELEV:5a74.8 EXISTING GROUND SURFACE _5100 SILTY CLAY �---- _ Qv STIFF SILTY CLAY TW—ID TOC: 5075.7 ELEV: 5073.2 SILTY CLAY TW— 9 TOC: 5476.4 ELEV: 3, 7 SILTY CLAY 5090 -5080 -5070 SIANU 5H IM ta)4Y LLAY ANI) U.AYLY SILI SILTY, FINE SAND CLAY AND CLAYEY SILT CLAYEY SILT {J AYFY RANT? CLAYEY SILT CLAYEY SAND DENSE SAND 5432.0 (S/4/16} — STIFF CLAY IAD. DENSE SAND, WET•• r. Al--' an _f 5020 _ DENSE SAND, DAMP 5010- KL DENSE -SAND AND SILTSTONE SILTY SAND, LAMINATED RD TY ('I AY SANDY SILT WITH CLA 5000-- - HARD CLAYSTONE SAND SANDY SILT _ ND WTH --SILT CLAYSTONE AND SILTSTONE 4980 WISE SANDSTONE 4970 4960- 4950- 4940 CLAYEY SAND • TD:709.U';:' :.r. • I I ..'. • _r .. CLA - STONE, WET HARD SANDSTOVE -5060 _5050 u i a ; -5040 .n prftenowa-- -5030 STIFF CLAY TD:47.00 TW—ID 9114 4 (%/4/I8).. SILTY SAND= -5020 -5010 -5000 -4990 4930 4920- 4910- PH 4980 4970 4960 4950 4900 1940 4930 -4920 4910 raeatechnical Baring Temporary Well Existing Monitor Well Quaternary Eolian = Quaternary Verdos Top of Cretaceous Laramie Formation = Top of Cretaceous Fox Hills Sandstone = Erosional Surface • = Predominantly Sand and Sandstone ~' 5 T Pldnned Bdse Grade OW 2012) Groundwater Level (March and May, 201 B) Well Screen —I I —• — • N • • _ See Figure 11 For Cross -Section Location NOTE: See boring records for detailed description of subsurface m dterial 200 0 299 4900 aca SCALE: r=20o' VERTICAL EXAGGERATION OF 13X WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. PROPOSED NORTH WELD LANDFILL UNIT 2 AU LT, WELD COUNTY, COLORADO FIGURE 16 I FT RIVER CROSS-SECTION E- E' r M44/•PM••;Mt+l lrsV-F[I. Len JUNE 2016 5057,7 New Scale House 5033.0 SWUM LWWIIE BOIlhGerlEIIPOftARY Y�f1.L (ton 4 a 5 8716) ORUJNONH7ER MONITOFIN3 %SELL (NAREH I, 2016) 'ROUNDWAIER ELEVATIDti CROUNOWA1ER CONTOUR CONTLWR INIER5b1L - to FEET NOT APFUCABLE (OampInted In idated, ahalogs 9ruundrxatar zeta) CiiQUNOWATER FLOW DRECTIDV MEN CCMCUR INTEFMEOIATE COMM OEPRE$a3N CONTOUR PAMW ROAD WINFRED/ED M7 ROAD - -- _- IN EFN FTENT ORMN& E TCPDCRAPHY A9 CF FEERWAY 21. 2618 •CfiWIOWAIER LEVEL WAu AE+v9URED LIEN NR PRWSUFE METHCO 'tI )J1AO, szURCUNDWATER ELEVAlICti SUSPECT WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. NORTH WELD SANITARY LANDFILL AULT. WELD COUNTY, COLORADO SWIFT RIVER FIGURE 17 OROUNDINATER FLOW DIRECTION, UPPER LARAMIE/ALLUVIUM, MAY 2016 21.99004 E New 5000 Scale House 4995 Maintenance z Shop cre .900 O RII 11 Nei 220 Jm ace FEET EFEP FOX H119 BOMNCi79JPORAR VELL (NAY 4 & 3 Pots) GROUNDWATER NCNITORINC YELL {MAHN 1. 201&) 6ROUNWA4TER ELEYA11@1 ROUNOWA1EH O2NTOLR COITUJR INTERVAL — 10 FEEL NOT A PUTAaE {Cair14I.toi In IJFSJated shalvnnr 9cundvatsr .) GROUNDWATER FLOW OREC110N INFO CONTOUR INIEANE0IATE CENTIME DEPII SSION CONTOUR PAlEI? ROAD = UNI6PROYED GIRT ROAD FENCE Ct.L1fRT -- — INIERIIRIENT ORANJAE 1CFOGRAPHY AS Cf FEBRUARY 21, ION JLRWFCWAlER 1EtE1 WAS PE43JRED US= AIR PRIMSLRE !CHILI O1 3/1/10. "GRWNWIATER ELEVA119N SIIiPECT WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, INC. NORTH WELD SANITARY LANDFILL AULT, WELD COUNTY, COLORADO MET RIVER FIGURE 18 GROUNDWATER CONTOUR MAP AND FLOW DIRECTION, FOX HILLS SANDSTONE, MARCH 2D16 AA i Widgrialla f OUJ OIRANGLE LOCATION 7W -* PERMIT NUMBER (USES TOTAL DEPTH • 2 a USR (895) NWLF UNIT 1 L NP = Total Depth Not Provided SOURCE; Office of the State Engineers Division of Water Resources 8AIAMOMTEWELL3 282.379 IRRIGATION' TD=NP Erne _ ■t 6Q BENSON ELL SCIJFH Od►7 . UC1S woc 29f& IRRIC R W 0 w as PROPOSED Nw 1'H WELL) LAIN LWILL UN 1'1 Z AULTr WELD COUNTY COLORADO !FT RIVER MENTAL SERVICES. LLC E S FIGj1RF 19 PERMITTED WATER WELLS WITHIN ONE MILE OF NWLF UNITS 1 AND 2 nn rout nutnmmt SO 40 yy 30 11111„(�91{�Ytlf►la 4114Ulf MitItPIIISal i► se iaili+: is ,1I p' •uIiiiiiulr I 30 40 60 50 40 30 20 MWO3 310112016 Mwoa 310112016 110fr MWO5 310112016 MW09 3/0112016 101 MYY10 MW12 g !an ig I IT H 1505 TW-1 TWi2 5103/2016 - 510412016 TW-4 5103/20/6 5/04/2016 5/03/2016 - 5/04/2016 3/01/2016 Twee 5103/2016 i 51 2016 10 0 10 IId0H'riitlalirI ,IE1a11111! 40 50 50 40 Maio ;.a�1�' rR I'�,IIIil1IIn$(111nY ulllI ni: FP��liFll it ItI11 5103/2016 - 5104/2016 3(011201 TW-8 510312016 - 51041204 IIluifinti111ITITITIrl111t11111IrI11LTIrnimi I11IIt9iTllllh111 II1111I11'1T11111t1'ItH PI1j1 --i ti to eK I M0 4 (Tirir71itrarlllill �1�rSllt�lli(Iilli, Irraaill?fii[n�[ (t 'fir n1"'arnwrtmi1"TrI GO 4/0 X 20 10 0 10 20 30 40 50 60 40 30 20 10 0 10 20 30 40 54 Cations (meq/l) Anions (meq/I) Cations (meq/I) Anions (meq/l) ei 111 60 10 0 10 20 30 40 SO HCO3 OO3 TWO 6/03/2016 - 5104/2016 T -1 ° 5103/2016 - 5/04/2016 40 3 120 10 0 10 20 3O 40 U Cations�meq/l) Anions (meq/I) Pre red by: Swift River Environmental DST OF CaORCO, PROPOSED NOIR MELD MM. UNIT2 ALAS, WELD WIIay1 COLORADO fl1i111N.i■� r •111 ygR L y[ J �' L a l✓t FIGURE 20 STIFF WEIS NC MONITOR Muss Mar UNITS 1AN�y D2 E 3,012016 0 MWO4■ MWO5 MW09 X10 MW12 Tt '-1 TVV-2 CI 1W-4 TW-5 TVV-5 A TW-8 T. 1W-9 0T 1O O 3/0112016 3/01/2016 3/01/2016 3101/2016 3/01/2016 5103/2016 5/03/2016 5103/2016 5/03/2016 5/03/2016 510313010 5103/2016 5103/2016 a T `1 rioar2o1s �aano1s Voarao1s 0412016 p4/2016 04/2016 0412016 C)4/2016 Ca Cations % meqi1 4 Firepaay: � totter tnvironmentai CI Anions iormmarippe MR �� n 21 r a FOR CS AND E OR UMTS I NC 2 1A WASTE MANAGEMINT DISPOSAL SERVICES OF' COLORADO, DO, INC. PROPOSED NORM VELD LANDFILL LJNrr 2 AULT, WELD COUNTY, COLORADO Alei'tfFL BAKER west Eolian (tile) Verdos Alluvium (Qv) Laramie Fm (KL) Fox Hills Sandstone (KFH) Pierre Shale (Kp) KFH K L Well Well SANDY SILT NWLFUNUT2 San SAND - & SANDSTONE (1 C-3cm/set) -CLAY-ST-0IVE - 1 "6 cm/set) EAST Ctv Well 11OALTE • '• - 4' J • •l - • • .. • • -!. - • r' - - - - -• • . -• . . • •- • ,_ _ • - 4 - - - - - _ • . r - - • _ - - - . a . • • • 5.� '•. � • - f . .r .• -. .• - 1. 1. ,• r' - . J. -•., `,•$. -. - 'i -••• - _ •• • • • • • • •ti •▪ 6. I ▪ . .• I .•• - _ •..- -• - .' _ • - -▪ • 'a 4 • • _ _ • L_ . - ... • -; • . ...•. ▪ - •- r •- • _ • •• . _. - ' - •- • J -' • •.••.7...- ✓ L - Y• , • .. • • I • • _ ..1- • .. • • • 1 - • _ - P • • • 5 la • . r _ • _ .. .. _ . r-• t - • _ I • f - •_• ▪ r - - '' -• • - ti ' • _I - - _ r _ - •'r- •. . • . • .• ▪ • • �r• • - . ' I . - •_ ' , •. •. ..' . I • ▪ - 1 - b - _ • ••4 • - • - ' • • - •_. •. • - I. •- .• - ' • • 1..I ••r I.• -•• I.. .flr• - j.t• 15 I• ▪ - • A • .- • . • - • • ▪ ! • .I - •• . . • - • -r -. •.I _ - [r • •1 . - • 5 L .4 • • . • : • f. • .V- - •• 1 • _ . • SHALES1 0167cm/sec) 7' to 45 ft -Inn 30' to COO ft T 0 4 WASTE MANAGEMENT DISPOSAL SERVICES OF COLORADO, I NC• PROPOSED NORTH WELD LANDFILL UNIT 2 AU LT, WELD COUNTY, COLORADO IFT RIVER IEWV?Wa1fI'ENIAL BEIGYI,CEs. PAC dfrordsatimariairee's.--- FIGURE 22 CONCEPTUAL HYDROGEOLOGIC MODEL Hydrogeologic Characterization December 2016 North Weld Landfill Unit APPENDIX B TABLES Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: Temporary Well Construction Details Temporary Well Development Details Groundwater Elevation Data Water Sampling Data Hydraulic Conductivity Test Results Permitted Water Wells within One Mile of NWLF Units 1 and 2 152047 FINAL Report of Hydrogeological Characterization North Weld Landfill Unit 2 TABLE 1 Temporary Well Construction Details December 2016 Number Well Date Drilled Ground Elevation (Ft Surface NISL) Depth Drilled (Ft BGS) Well Bottom (Ft BGS) Screen Bottom (Ft BGS) Screen BGS) Sand (Ft Pack BGS) Bentonite Seal (Ft BGS) Top (Ft Top Start End TW-01 2/19/2016 2/19/2016 5102.5 49.4 49.4 49.1 39.1 36.0 34.0 TW-02 2/22/2016 2/23/2016 5135.5 129.0 129.0 128.7 108.7 105.7 103.7 TW-03 NA NA NA NA NA NA NA NA NA TW-04 2/23/2016 3/2/2016 5109.6 104.0 103.5 103.2 88.2 84.4 82.4 TW-05 2/25/2016 2/25/2016 5076.3 49.0 49.0 48.7 28.7 25.5 23.5 TW-06 2/24/2016 2/25/2016 5077.0 109.0 109.0 108.8 93.8 90.5 88 TW-07 NA NA NA NA NA NA NA NA NA TW-08 3/1/2016 3/1/2016 5074.8 104.0 92.3 92.0 72.0 69.0 67.0 TW-09 2/29/2016 2/29/2016 5073.7 49.0 47.3 47.0 32.0 29.0 26.5 TW-10 2/26/2016 2/26/2016 5073.2 98.5 97.8 97.5 77.5 73.8 71.2 Notes: Ground Surface Elevations are estimated from NWLF Unit 2 topographic map. Ft MSL = Elevation in feet above mean sea level Ft BGS = Feet below ground surface NA = Planned shallow wells TW-3 and TW-7 were not drilled based on the absence of shallow groundwater in paired deep wells TW-4 and TUFT -8, respectively. S152047 FINAL Report of Hydrogeological Characterization North Weld Landfill Unit 2 TABLE 2 Temporary Well Development Details December 2016 Well Number Date Installed Date Developed Ground Surface Elevation (Ft MSL) Stickup (Feet) Top of Casing Elevation (Ft MS1) Development Method Initial, Final Depth to Water (Ft BGS) Initial, Final Well Depth (Ft BGS) Initial, Final Conductivity (µS/cm) Initial, Final pH (std units) Initial, Final Temperature r C) Cumulative Volume Removed (gal) Initial, Final Comments (color, turbidity, odor) TW-01 2/19/2016 3/7/2016 5102.5 3.0 5105.5 Bailer, Pump 44.6 44.6 49.2 49.2 3554 3717 7.18 7.08 11.2 10.5 0.3 40.0 Dark brown, cloudy, no odor Light tan, clear, no odor TW-02 2/23/2016 3/3/2016 5135.5 3.6 5139.1 Bailer 124.5 127.3 129.0 129.0 1481 3407 7.61 7.49 9.9 12.7 0.5 5.0 Brown, cloudy, no odor Brown, cloudy, no odor TW-03 NA NA NA NA NA NA NA NA NA NA NA NA TW-04 3/2/2016 3/7/2016 5109.6 3.2 5112.8 Bailer, Pump 09.0 91.2 102.9 103.6 1428 1467 7.42 7.36 11.4 12.4 0.3 30.0 Brown, cloudy, no odor Light tan, clear, no odor TW-05 2/25/2016 3/3/2016 5076.3 3.2 5079.5 Bailer, Pump 33.2 49.5 48.8 48.8 668 732 9.05 8.29 12.8 13.0 1.5 37.5 Brown, cloudy, no odor No color, clear, no odor TW-06 2/25/2016 3/3/2016 5077.0 3.3 5080.3 Bailer, Pump 46.3 57.4 108.8 108.8 351 627 9.05 8.12 16.0 14.8 0.3 60.0 Dark brown, cloudy, no odor No color, clear, no odor TW-07 NA NA NA NA NA NA NA NA NA NA NA NA TW-08 3/1/2016 3/4/2016 5074.8 3.0 5077.8 Bailer, Pump 42.0 94.0 92.5 92.6 660 1903 8.68 7.29 11.8 16.2 0.3 70.0 Dark brown, cloudy, no odor No color, clear, no odor TW-09 2/29/2016 3/4/2016 5073.7 2.7 5076.4 Bailer 43.4 49.9 47.6 47.5 1825 2104 7.53 7.54 15.0 15.6 0.3 3.8 Light brown, slightly cloudy, no odor Light brown, slightly cloudy, no odor TW-10 2/26/2016 3/4/2016 5073.2 2.5 5075.7 Bailer, Pump 53.5 99.6 98.0 98.1 1217 3088 7.27 7.22 13.3 16.3 0.5 40.0 Brown, cloudy, no odor No color, clear, no odor Notes: Ground Surface Elevations are estimated from NWLF Unit 2 topographic map Ft MSL = Elevation in feet above mean sea level Ft BGS = Feet below ground surface NA = Planned shallow wells TW-3 and TW-7 were not drilled based on the absence of shallow grou ndwate in paired deep wells TW-4 and TW-8, respectively S152047 FINAL Report of Hydrogeological Characterization North Weld Landfill Unit 2 TABLE 3 Groundwater Elevation Data December 2016 Well Number Stratigraphic Unit Date Measured Top Elevation (Ft of Casing MSL) (Ft Total Depth below datum) (Ft Depth Groundwater below datum) to Groundwater Elevation (Ft MSL) Monitor Wells - NWLF Unit 1 MW -3 KFH - Fox Hills Fm 3/1/2016 5150.35 152.0 134.59 5015.76 MW -4 KFH - Fox Hills Fm 3/1/2016 5081.58 119.7 74.26 5007.32 MW -5 KFH - Fox Hills Fm 3/1/2016 5101.01 116.4 98.09 5002.92 MW -9 Qv - Verdos Alluvium/Laramie 3/1/2016 5087.14 57.6 43.29 5043.85 MW -10 KFH - Fox Hills Fm 3/1/2016 5126.96 158.3 133.49 4993.47 MW -12 KFH - Fox Hills Fm 3/1/2016 5102.2 ** 130.3 77.1 * 5025.1 * Temporary Wells - NWLF Unit 2 TW-01 Qv - Verdos Alluvium/Laramie 5/4/2016 5105.5 52.0 472 5057.7 TW-02 KFH - Fox Hills Fm 5/3/2016 5139.1 132.3 128.0 5011.1 TW-04 KFH - Fox Hills Fm 5/3/2016 5112.8 106.4 88.7 5024.1 T -05 Qv - Verdos Alluvium/Laramie 5/3/2016 5079.5 51.9 37.9 5041.6 TW-06 KFH - Fox Hills Fm 5/3/2016 5080.3 112.1 50.6 5029.7 TW-08 KL - Laramie Fm 5/4/2016 5077.8 95.0 45.8 5032.0 TW-09 Qv - Verdos Alluvium/Laramie 5/4/2016 5076.4 49.7 42.6 5033.8 TW-10 KL Laramie Fm 4 2016 5/ / 5075.7 100.0 56.3 5019.4 Notes: Ft MSL = Elevation in feet above mean sea level (National Vertical Datum 1988). Datum is top of PVC Casing. * Depth to groundwater obtained by air pressure method. Groundwater elevation is approximate. ** Approximate top of casing elevation as resurveyed 8/26/13. Qv - Verdos Alluvium/Laramie KL - Laramie Fm KFH - Fox Hills Fm S152047 FINAL Report of Hydrogeological Characterization North Weld Landfill Unit 2 TABLE 4 Water Sampling Data NWLF Unit 1 Wells - Analytical Data Summary for 3/01/2016 Constituents Units MWO3 MWO4 MWO5 MWO9 MW1O MW12 Alkalinity, bicarbonate (as caco3) MG/L 420 370 570 550 400 510 Calcium -dissolved MG/L 310 120 160 500 160 130 Chloride MG/L 8.7 8.6 11.0 94.0 9.1 8.5 Magnesium -dissolved MG/L 200 52 73 510 82 71 Potassium -dissolved MG/L 8.1 10.0 9.3 9.4 8.2 6.0 Sodium -dissolved MG/L 130 89 110 100 140 85 Sulfate MG/L 1300 290 260 2000 560 270 NWLF Unit 2 Wells - Analytical Data Summary for 5/03/2016 to 5/04/2016 December 2016 Constituents Units TW-1 TW-2 TW-4 TW-5 TW-6 TW-8 TW-9 TW-10 Alkalinity, bicarbonate (as caco3) MG/L 1200 530 310 180 140 520 310 830 Calcium -dissolved MG/L 180 390 160 43 50 160 190 560 Chloride MG/L 160.0 11.0 8.2 50.0 11.0 11.0 64.0 24.0 Magnesium -dissolved MG/L 430 240 97 53 25 68 120 280 Potassium -dissolved MG/L <5.0 11.0 5.1 <5.0 5.8 7.5 9.3 13.0 Sodium -dissolved MG/L 160 220 34 58 29 77 89 160 Sulfate MG/L 1000 1900 550 190 120 290 340 2100 S152047 FINAL Report of Hydrogeological Characterization North Weld Landfill Unit 2 TABLE 5 Hydraulic Conductivity Test Results December 2016 Well or Screened Interval Hydraulic Conductivity (cm/sec) Geometric Test (cm/sec) Values Mean of Boring Number Groundwater Zone Lithology Test Qv- Verdos fine-grained Slug In 1.90E-02 TW-5 Alluvium/Laramie Silty sand Slug I Out 5.13E-03 1 4.06E-02 Qv- Verdos Fine to coarse sand with Slug In 2.02E-01 TW-9 Alluvium/Laramie , gravel Slug Out 1.38E-01 Fissile siltstone and Slug In 2.54E-03 2.04E-03 claystone and with 3.5 ft coal lignite seam Slug Out TW-8 KL - Laramie Fm 2.13E-03 Fine-grained sand and Slug In 1.68E-03 siltstone, seam with 4 ft coal Slug Out 1.89E-03 Tai -10 KL - Laramie Fm -Hills TW 4 KFH - Fox Fm Slug In 6.15E-03 Fine-grained sandstone Slug Out 7.54E-03 1.16E-02 TW-6 KFH - Fox Hills Fm Fine-grained sand and Slug In 2.06E-02 sandstone Slug Out 1.58E-02 NWE-07 Qe-Eolian Deposit Clayey gravelly silt, transition sand to Laboratory 2.1E -02 2.1E -02 NWE-12 Q,- Verdos Sandy and silty clay Laboratory 5.20E-02 5.20E-02 Alluvium/Laramie Note: "Slug In" indicates test initiated by weighted tube insertion into groundwater in well. "Slug Out" indicates test initiated by weighted tube removal from groundwater in well. Because of similarity in values, both slug in and slug out test results are used to calculate the geometric mean. S152047 FINAL Report of Hydrogeological Characterization North Weld Landfill Unit 2 TABLE 6 Permitted Wells Within One Mile of NWLF Units 1 and 2 December 2016 Well Identifications _ Location Information S/T/R Location Information Detailed Location Information Other Information Well Name Receipt Number Permit Number Well - Depth UTM_x UTM_y Township Range Section q160 q40 Feet N or S From Nearest Section Line Feet E or W From Least Section Line Uses T7N, R66W COMELY 0053997A 91-GX NP 30 514950.4 4491089 T7N T7N R66W 18 SW SE 1183 5 2329 W CLOSED LOOP GEOTHERMAL CONOCO PHILIPS MW -1 05 19377J 254860 515607.2 4492340.5 R66W 18 NE NE 138 N 1110 E MONITORING WELL CONOCO PHILIPS MW -2 0519377K 254861 30 NP 40 515608.7 4492331.4 T7N R66W 18 NE NE 168 NP 120 N NP 5 1105 NP 2515 E NP E MONITORING WELL CONOCO PHILLIPS [3] 42492 42492-MH 515731.5 4492184.9 T7N R66W 18 NE NE MONITORING WELL DOW RAY 3671342 299017 515180.1 4490774 T7N R66W 18 SE SW DOMESTIC, STOCK DOW ROY CJR 9061557 13346-F 15 515428.3 4490869 T7N R66W 18 SE SW 400 5 1700 E IRRIGATION BENSON WELL SOUTH 3670199 298190 25 516177.9 4493734.1 T7N R66W 8 NW NW 798 N 730 W DOMESTIC, STOCK TRO UDT 93883 101991 98 517015.5 44924364 T7N R66W 8 SE SW 100 NP 2280 5 NP N 1750 NP 180 E NP E DOMESTIC, STOCK WOODS C620298 298-WCB 31 515549.5 4493793.5 T7N R66W 8 NW NE IRRIGATION CARTER C620926 926-WCB 150 NP 200 515897 4493273 T7N R66W 7 NE SE DOMESTIC BAIAMONTE WELL 1 3643214 282379 514500 4495372 T7N R66W 6 NW NW 544 N 595 W IRRIGATION /V' LBH `N 11 GUPTA 0545048X 5-GX 513511.9 4491638 T7N R67W 13 NE SW 2215 N 2386 E GEOTHERMAL POTTS 3658689B 91-GX 300 NP NP NP NP 513788.9 4491912 T7N R67W 13 NW NE 1319 N 1474 E GEOTHERMAL, CLOSED LOOP GEOTHERMAL ROBERTS 3645507 283241 513430.1 4493120 T7N R67W 12 NW SW 0 N 0 W DOMESTIC, STOCK SCOULAR 04296828 210503-A 512738.7 4492370.9 T7N R67W 12 SW SW 200 5 360 W DOMESTIC WALTERS 0429682A 210503 512729.6 4492382.9 T7N R67W 12 SW SW 240 NP 5 NP 330 NP W NP DOMESTIC WINICK 3674203 301288 512829.9 4492511.5 T7N R67W 12 SW SW HOUSEHOLD USE ONLY I S152047 NP I._I I= Not Provided by the Office of State Engineer (USE) database = Number added by SRES for clarification USE records review conducted 6/3/16 FINAL Hydrogeologic Characterization December 2016 North Weld Landfill Unit 2 APPENDIX C TEMPORARY WELL INSTALLATION RECORDS - BORING LOGS AND COMPLETION REPORTS 152047 FINAL SAMPLE INFORMATION SOIL SAMPLING x SPLIT -BARREL SAMPLE & SPT THIN -WALL TUBE SAMPLE (PER ASTM D1587) CONTINUOUS SAMPLE SPT VALUE IS BLOWS PER 12 INCH PENETRATION UNLESS OTHERWISE SPECIFIED. SAMPLE ODORS, WHERE APPROPRIATE NONE NO ODOR MO MODERATE ODOR WO WEAK ODOR SO STRONG ODOR FILL CLAY* SILT* SAND GRAPHIC LOG ``i�.t�i�n�1� Fe we weD.4740.4a� r1�Af�.IL_ k .L lulvhtuhf GRAVEL CONCRETE ASPHALT COAL OR LIGNITIC MATERIAL WELL COMPLETION DETAIL -� TyTaT,Tyi raYatiT*T fLTaT1TYT aVAVAVaVA VAVAVAVO WIGTACT :g-; 411 gl Ira tit rJ a aTa*aV JoralwAvA aTaTaT AvATaT.Ta at1Tt*R; aTaT,VAY. ATiTaTaT a*1TAVAVA T V, PORTLAND CEMENT/ SODIUM BENTONITE GROUT SODIUM BENTONITE CHIP SODIUM BENTONITE PELLET SEAL SAND OR GRAVEL BACKFILL SCREENED INTERVAL CAP NOTE: A BORING/WELL RECORD IS CONSIDERED REPRESENTATIVE OF SUBSURFACE CONDITIONS AT THE BORING/WELL LOCATION ON THE DATES SHOWN. IT IS NOT WARRANTED TO REPRESENT SUBSURFACE CONDITIONS AT OTHER LOCATIONS OR TIMES. SUBSURFACE CONDITIONS SHOWN ON THESE RECORDS OR ON PROFILES DEVELOPED FROM THESE RECORDS ARE NOT WARRANTED, THEY ARE ESTIMATED BASED ON ACCEPTED ENGINEERING AND GEOLOGIC PRINCIPLES AND PRACTICES AND REASONABLE PROFESSIONAL JUDGEMENT. * USCS CLASSIFICATION USED WHERE TEST RESULTS ARE AVAILABLE. SWIFT RIVER ENVIRONMENTAL SERVICES, LHG LEGEND FOR MONITOR WELL AND SOIL BORING RECORDS DEP (Fei 0 0.7 5 10 13. 15 16. 20 23. 24. 25 30 35 4O rH 't �•�, L..� e I I n USC ReCOwCr� Odor SPT TemporaryDI '+'ell Detail 0 CrLag �� g Intervlal Estimated Ground Surface: 5102.5' .-.-''Locking „i„ Ca a Stickup 5 TOPSOIL: minor gypsum, Stiff, brown (10YR 5/4), silty mottling, moist todamp CLAY, CL ./C)// / 48" 25" 46" 43° 33" 45" 40" ---Bentanite Chips Stiff, brown (10YR 5/4), silty CLAY, minor gypsum mottling, damp 4.0' -s- 8.25" Borehole 0 , Reddish brown (5YR 5/6), clayey SILT with7; few fine gravel, damp 3 -}Bentonite Crput Firm to very firm, tan (10YR 7/4), silty fine— grained SAND with clay few coarse sand and to coarse —grained gravel, damp SM• • •. ' ' - 0 2" ..d. SCH 40 PVC Stiff, tan (10YR 7/4) fine—grained sandy SILT CL ' Dense, brown (10YR 6/6), silty fine— to coarse grained —SAND, damp ...becomes stiff, brown —gray (10YR 6/2) clay © 33.75' to 34.25' SM • • . . • • ' .' ,•• . '' ' ' ' • • • L : : .. • !� cs�' 34.1' ir'krM :`,4;:;`.u.:: C -C;, ►ir)i Q c.4 i� - 4, 1►. 4P 4P• } Bento n'te $44.► Fh 4P 4► 4:;►+ i., 1k Pellets 360...i+: . : • ; :-•' : . : 10-20 Washed Silica Sand 39.1' WIFT RIVER NiVIADW'MENTA,L SERVICES, EEC :PTH eet) p 0 5 10 15 20 25 30 35 4O Soil Boring Record Location T-1 Coordinates: N 457537, E 2158581 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Dote February 19, 2016 Page 1 of 2 DEP (Fe 40 41 45 45, 49 50 55 60 65 70 75 80 rH 't Graphic Recovery $PT»„ Temporary Well Detail DI 0 F SM • .. .. .. . • . . ' • : 33" 49" 49.1' 10-20 Washed Silica Sand I.D. .3 Medium dense gray —brown (5YR 6/6), silty clayey fine—grained SAND ...cemented layers, wet @45.25' TOP OF LARAMIE FM Very stiff, grey weathered CLAYSTONE with rust —color streaks ...2" clayey coal seam 0 48.75' CL 2" PVC Well Screen D.D1{ n Slots .4 B.T. CD 49.4' 49.4, :PTH eet) 40 45 50 55 60 65 70 75 80 SWIFT SERVICES, EEC Soil Boring Record Location TW-1 Coordinates: N 457837, E 2188581 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Date February 19, 2016 Page 2 of 2 FORM NO GWS-31 4/2012 WELL CONSTRUCTION AND STATE OF COLORADO, OFFICE OF 1313 Sherman St , Ste 821, Denver, Main (303) 866-3581 Fax (303) TEST THE STATE CO 80203 866-3589 REPORT ENGINEER www water state.co us For Office Use Only a1. WELL PERMIT N U M B ER': jitun 2. WELL OWNER INFORMATION NAME OF WELL OWNER: Waste Management of Colorado MAILING ADDRE S:2466 West Union Ave. CITY Englewood STATE: CO ZIP CODE:80110 TELEPHONE NUMBER wiarea code: (303) 914-1445 3. WELL LOCATION AS DRILLED: N 1/4, SE 1/4, Sec,, 7 Twp. 1I: N or SI El Range_+ 6 01 E or W ! DISTANCES FROM SEC LINES: 2250 ft. from O N or x S section line and 2640 ft from ©I E or ■I W section line SUBDIVISION N/A LOT --- , BLOCK --- FILING (UNIT) --- Optional GPS Location: GPS Unit the following Format Owner's Well Designation tYV1 must use settings: must be UTM, Units E asting� _-- must be meters, Datum must be NADUU, Unit be to true N, Ii I Zone 12 ICI f Zone , must set or 13 STREET ADDRESS AT WELL LOCATION: 400D0 Weld County Road 25, Ault, CO 80610 Northing: - GROUND SURFACE ELEVATION 5102.5A. (est.) feet DRILLING METHOD Hollow Stem Auger DATE COMPLETED 02/19/2016 _ TOTAL DEPTH 49.4 feet DEPTH COMPLETED 49.1 feet .5. GEOLOGIC LOG 6. HOLE DIAM (in.) From (ft) To (ft) Depth Type Grain Size I Color Water Loc 8.25 0 49.4 0 to 49 Sand, silt, and clay See attached log 7. PLAIN CASING: OD (in) Kind Wall Size (in) From ft To(ft) 2.375 PVC 0.154 +3.0 39.1 �l PERFORATED CASING: Screen Slot Size (in): 0.010 2.375 PVC 0.154 39.1 49.1 _ a 8. FILTER PACK: 9. PACKER PLACEMENT: Material Silica Sand Type Bentonite Chips Size 10-20 Interval 36.0-49.4 Depth 34.0-36.0 0. GROUTING RECORD Material Amount Density Interval Placement Remarks: Grout 10.2 cu ft --- 4.0-34.0 Tre rat ie Chips 1.4 Cu ft --- --- 0-4.o Direct 11. DISINFECTION Type NA Amt. Used N/A 12, WELL TEST DATA: MI Check box it Test Data is submitted on Form Number GWS 39 Supplemental Well Test. TESTING METHOD NIA Static Level --- ft. Date/Time measured- --- Production Rate --- gpm Pumping Level--- ft DaterTime measured --- , Test Length (hrs) --- Remarks: --- 13. I have read the name entered if filing document that conta of the contrachny ,license. statements online) ins false statements If filirncj made herein and know the contents and certified in accordance with is a violation of section online the State Engineer considers Rule thereof, and they are true 17.4 of the Water Well 37-91-108(1)(e), C .R.S. , and entering of licensed to my knowledge. This document Construction Rules, 2 COR is punishable by fines up to contractor name to be compliance is signed 402-2. The filing of $5000 and#or revocation with Rule 1744 (or a Company Swift River Name: Environmental Services, LLC Phone \At/area code: (303) 695-4660 License Number: Malting Address: 26 West Dry Creek Circle Ste. 470, Littleton CO 80120 Si,or enter name if film onI ne) Print Name and Title Date Cathryn Stewart, Project Manager 06/06/2016 ---st- DEP (Fei 4 1 5 9. 10 14. 15 20 25 30 35 40 rH `) Description USC Recovery do r �aPT Temporary . Well Detail I DI F Graphic Log sample ample Estimated Ground Surface: 5135.5' Locking "J" Ca 3.6' a Stickup 2 TOPSOIL: Stiff, brown (1OYR 5/4), silty CLAY with roots, damp CL,/ ML 42" 36" 56" 52" 39" 43" 1 42" t 60" NO NO NO NO NO NO NO NO --Bentanite Chips Stiff, brown ( 1OYR 5/4), clayey SILT, damp CL 1001 ///: 4.0' 0 -r- 8.25" Borehole Stiff, reddish brown (10YR 6/6) fine grained sandy SILT, damp D ,- Firm, tan ( 1 Y7/4) and brown 1 Y 4 0 R �w � b 0 R 5�'� mottled silty fine-grained SAND with cloy, dome TOP OF LARAMIE FM SM ' • .• . • • -}Bentonite- Grout - A 2' i. d. SCH 40 PVC - Hard, gray (5YR 6/1) with orange streaks weathered CLAYSTONE CL SWIFT RIVER ENVIRONMENTAL SERVICES• EEC :PTH eet) P 0 5 10 15 20 25 30 35 40 Soil Boring Record Location T-2 Coordinates: N 458962, E 2185832 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Dote February 22, 2016 Page 1 of 4 DEP (Fe 40 45 50 54 55 60 65 70 70 75 80 rl-I 'tDescription ic Graphic nterva Recovery Odor ANT Temporary Well Detail DI 0 ' .,.medium dense fine—grained silty sand O 51.75' CL 7/ //://: ///1 58" 55" 58" 56" 54" 55" 59" 60" NO NO NO NO NO NO NO NO Borehole ---Bentanite Grout 2" i.d. SCH -/—A-8,25" / .3 - — Dense, brown (10YR 6/6), fine grained silty SAND, weakly cemented, damp ...weathered claystone @ 55.3' to 55.75' and 57.0' to 57.5' TOP OF FOX HILLS SM ' 1 — 40 PVC 5 Dense, tan and light brown and gray brown, fine—grained SAND with silt, weakly to moderately cemented . " , :PTH eet) 40 45 50 55 60 65 70 75 80 SWIFT RIVER ENVIRONMENTAL SERVICES, EEC Soil Boring Record Location T-2 Coordinates: N 458962, E 2185832 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLR Installation Date February 22, 2016 Page 2 of 4 DEPTH (Feet) Description use �� GrLog interval Recovery Odor SPT Mp Temporary Well Det Q I l DI F 80 - 85— Dense, brown and gray (10YR 6/6— 10YR 6/2) fine-groined SANDSTONE, damp to sightly moist SP .' ' '. • 'i :. • . . • • , . . so . . ' • 58" 50" 58" 59" 48" 60" 55" 54" NO NO NO NO NO NO NO NO -•- 8.25" Borehole — 2" i.d. SCH A 40 PVC — 90 — - -Bentonite Grout — 95 98.8 100 — Very dense, gray (N6), fine—grained strongly cemented SANDSTONE, slighty moist ,-. {� 105— 103.7 1► * 4~`" I. iW- 1 " " 1r •F�; '''" I. ;: k�..'"�' '` P t --Bentonite Pellets — �w►w * 4VI ' � ' k �� h k�44 a. k'a� iM 107. 105.7' 108.O 110- CLAYST0N ery ar E, ac dompf an rus —co or orange CL , 10-20 Washed Silica Medium dense, light grained silty SAND, rust —color staining ...black, gray rust 0 112.0' ...weathered CLAYST0NE 114.0' brown (10YR 7/4), fine— weakly cemented with —color stained CLAYSTONE with sand layers O SP I • ' , , • , ' '. ....'• • • ' ' . . ' ., 108.7 Sand - 115— -� 2" I.D. PVC Well Screen 0.010" Slots - 120 SWIFT RIVER ENVIRONMENTAL SERVICES, EEC PTH eet) 80 85 90 95 100 105 110 115 120 Soil Boring Record Location TW-2 Coordinates: N 458g62, E 2185832 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SL's Installation Date February 22, 2016 Page 3 of 4 DER (Fe 12 12 13 13 14 14 15 15 16 rH Description USC Graphic Log Sample Recovery Odor sPT Nib Temporary l Well Detail DI 0 See 180.0' to 120.0' SP • • ' 60" 60" NO NO 128.7' 10-20 Washed Silica Sand .' • . 7 -� 2" I.D. PVC Well Screen 0.010" Slots B.T. @ 129.0') 129.0' 5- ) 5— ) 5— ) SWIFT RIVER ENVIRONMENTAL SERVICES, J AC PTH eet) 120 125 130 135 140 145 150 155 160 Soil Boring Record Location TW-2 Coordinates: N 458962, E 2185832 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Page 4 of 4installation Date February 22, 2016 1 FORM NO GWS-31 4/2012 WELL CONSTRUCTION AND TEST REPORT STATE OF COLORADO, OFFICE OF THE STATE ENGINEER 1313 Sherman St., Ste 821, Denver, CO 80203 Main (303) 866-3581 Fax (303) 866-3589 www.waterstate.co us 1. WELL PERMIT NUMBER: !IR 5498E 2. WELL OWNER INFORMATION NAME OF WELL OWNER: Waste Management of Colorado _ MAILING ADDRESS: 2400 West Union Ave. CITY: Englewood STATE: CO TELEPHONE NUMBER wlarea code: 303) 914-1445 ZIP CODE: 80110 For Office Use Only 3. WELL LOCATION AS DRILLED: 1K4, NW 1/4, Sec., 7 Twp 7 [ N or S, Ell Range 66 DISTANCES FROM SEC, LINES: 1730 ft. from Cg± N or Li S section line and 260 ft from it ■I E ar E or W W section line SUBDIVISION NIA LOT--- , BLOCK --- , FILING (UNIT) Owner's Well Designation : TW 2 Easting Optional GPS Location: GPS Unit must use the following settings: Format must be UTM, Units must be meters, Datum must be NADB3, Unit must be set to true N, Ell Zone 12 or Iol Zone 13 STREET ADDRESS AT WELL LOCATION: 40000 Weld County Road 25, _ Ault, CO 80610 Northing: --- 4, GROUND SURFACE ELEVATION 5135.5 (Est.) feet DRILLING N11ETHOD Hollow Stem Auger DATE COMPLETED 02/22/2016 TOTAL _ DEPTH 129.0 5. GEOLOGIC LOG De • th Tpe 0to129 See attached log feet DEPTH COMPLETED 128.7 feet 6. HOLE DIAM (in.) From (ft) To (ft) Sand, sill, and clay Grain Size Color Water Loo 8.25 0 129.0 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 0_A54 +3.6 1087 PERFORATED CASING: Screen Slot Size (in) 0 010 2.375 PVC 0.154 108.7 128.7 Remarks: 8. FILTER PACK: Material Size Interval Silica Sand 10-20 105.7-129.1 9. PACKER PLACEMENT: Type Bentonite Chips Depth 103.7-105.7 10. GROUTING RECORD Material Amount Density Interval Placement Grout 33.9 cu ft --- 4.0-103.7 Tremie ie Chips 1.4 cu ft --- 0-4.0 Direct 11. DISINFECTION: Type NA Amt. Used N/A 12. WELL TEST_DATA: 4 Check box if Test Data is submitted on Form Number GWS 39 Supplemental Well Test. TESTING METHOD N/A Static Level --- ft D ater'Tim e measured: --- , Production Rate --- g pm Pumping Level --- ft Date/Time measured -- , Test Length (hrs) Remarks: --- 13. I have read the statements made herein and know the contents thereof, and they aro true to my knowledge. This document is signed (or name entered if filing online) and certified in accordance with Rule 17.4 of the Water Well Construction Rules, 2 CCR 402-2. The filing of a document that contains false statements is a violation of section 37-91-108(1)(e), C.R.S.* and is punishable by fines up to $5000 and/or revocation of the contracting license. If filing online the State Engineer considers entering of licensed contractor name to be compliance with Rule 17.4 Company Name. Phone w/area code License Number: Swift River Environmental Services, LLC (303) 695-4660 --- Mailing Address: 26 West Dry Creek Circle, Ste. 470, Littleton, CO 80120 Sign or enter name online Print Name and Title Cathryn Stewart, Project Manager si_Mdsls„, Date 06/06/2016 DEP (Fei 0 2 5 10 15 18. 20 22. 25 30 30. 35 37. 40 U SC Graphic E+ r I I n Recovery Log Interval Odor rH 1) Sample pT .P" Temporary Well ' . CI I DI {F Estimated Ground Surface: 5109.6' Locking "J" Ca 3.2' Stickup TOPSOIL: Firm, brown (10YR 5/4) silty CLAY with roots and clayey silt, damp CL/ ML ' 44" 60" 57" 56" 54" 53" 55" 50" NO NO NO NO No NO NO NO --j"Bentonite Chips Stiff, brown (10YR 5/4) clayey SILT, damp CL 4.0' -x8.25„ Borehole -Bentonite— Grout Stiff, reddish —brown (10YR 6/6), fine— grained sandy SILT with clay and few [medium to coarse sand, damp Medium dense, tan (10YR 7/4) silty fine— to coarse —grained SAND with mottling, damp TOP OF LARAMIE FM SM • •' •' . . . • 2" i.d SCH . 40 PVC 5 Stiff, brownish —gray (10YR 6/2) with rust— color staining weathered CLAYSTONE with silty fine—grained sand streaks, damp CL / 8 layers, Dense, SAND with brown (10YR thin rust —color 6/6), silty weathered (1/2") staining, damp fine—grained CLAYSTONE SWIFT RIVER ENVIRONMENTAL SERVICES, EEC PTH eet) P 0 5 10 15 20 25 30 35 40 Soil Boring Record Location TW-4 Coordinates: N 460117, E 2187115 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLID Installation Date February 23, 2016 Page 1 of 3 DEP (Fe 40 45 50 51 55 59 60 65 70 75 80 rH `t • D c Ir I t I Irl �JC Gr�pHi� Lcg sample In{erval Recovery Odor r Temporary Well Detail DI (F See 37.8' to 40.0' CL 58..E C" 60" 28" 60" 58" 42" NO NO NO NO NO NO NO 8.25" Borehole Benkonite Grout 2" 14, SCH _re- Medium dense, tan (10YR 7/4) fine—grained SAND with silt, weak to moderate cementation, damp SP •5 , ' ' . • • . .• ' . • • . . .' • r . L TOP OF FOX HILLS - Very dense, gray —brown with rust —color staining, weathered fine—grained SANDSTONE ...highly weathered gray fine—grained silty sand CO 63.25` A 40 PVC ...very hard cemented brown —gray, fine— grained sandstone O 74.0' to 70.0' PTH eet) 40 45 50 55 60 65 7t 75 80 SWIFT RIVER ENVIRONMENTAL SERVICES, LICK Soil Boring Record Location TW-4 Coordinates: N 460117, E 2187115 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Dote February 23, 2016 Page 2 of 3 Soil Boring Record Location TW-4 Coordinates: N 460117, E 2187115 Drilled By Drilling Engineers Drilling Method HSA FORM GWS-31 4/2012 NO I WELL CONSTRUCTION STATE OF COLORADO, 1313 Sherman Main (303) AND TEST REPORT OFFICE OF THE STATE ENGINEER St., Ste 821, Denver, CO 80203 866-3581 Fax (303) 866-3589 www.water state .co•1us For Office Use Only 1. WELL PERMIT NUMBER: MH-M54990 2. WELL OWNER INFORMATION NAME OF WELL OWNER: Waste Management of Colorado MAILING ADDRESS:2400 West Union Ave. - CITY: Englewood STATE: CO ZIP CODE: 80110 TELEPHONE NUMBER w/area code: (303) 914-1445 3, WELL LOCATION AS DRILLED: NW 1/4, NW 1/4, Sec., 7 TWp 7 Incj N or s, Di Range 60 Iii E or W 13I DISTANCES FROM SEC LINES: 620 ft. from tJ N or U S section line and 1535 ft from GI E or Q1 W section line SUBDIVISION: N/A LOT--- , BLOCK --- FILING (UNIT) --- Optional GAP'S Location: GPS Unit following _ Owner's Well Designation: TWA must use the settings: Format must be L'TM, Units Easting ---- be meters, Datum be NADS3, Unit be true N, (-. IE1 must STREET ADDRESS AT must must set to WELL LOCATION: 40000 Weld County Road Zone 12 25, Ault, or Zone CO 80610 13 Northing: --- 4. GROUND SURFACE ELEVATION 5109.6 (Est.) feet DRILLING METHOD Hollow Stern Alger DATE COMPLETED 0212312016 TOTAL DEPTH 104.0 feet DEPTH COMPLETED 103.2 feet 5. GEOLOGIC LOG: 6 HOLE DIAL (in ) From (ft) To (ft) Depth Type Grain Size Color Water Loc. 8.25 0 104.0 _ 0 to 104 Sand, sill, and clay See attached log 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 0.154 +3.2 88.2 } . PERFORATED CASING: Screen Slot Size (in): 0.010 2.375 PVC 0.154 88.2 .8. FILTER PACK: 9. PACKER PLACEMENT: Material Silica Sand Type Bentonite Chips Size 10-20 - Interval 84.4-104.0 Depth 82.4-84.4 10. GROUTING RECORD Material Amount Density Interval Placement Remarks: Grout 26.6 cu ft --- 4.0-82.4 Trernie ie Chips 1.4 Cu ft --- 0-4.0 Direct I 11. DISINFECTION:ape NA Amt Used N/A - 12. WELL TEST DATA: I I Check box of Test Data is submitted on Form Number GVVS 39 Supplemental Well Test. TESTING METHOD NIA Static Level ft. D atefTi me measured: --- Production Rate --- --- gpm , _ Pumping Level --- ft. Date/Time --- Test Length --- measured , (hrs) - _ Remarks: --- 13a I have read name entered document that of the contracting the statements made herein and know the contents thereof, and if filing online) and certified in accordance with Rule 11.+4 of the contains, false statements is a violation of section 37-91-108(1)(e), license. if filingonline the State Engineer considers ontorirt9 they Water C.R.S., of licensed are true to my knowledge. This document Well Construction Rules, 2 CCR 402-2. and is punishable by fines up to contractor name to be compliance is signed The filing of $5000 and/or revocation with Rule 17.4 (or a Company Name: Swift River Environmental Services, LLC (303) Phone wfarea 695-4660 code License Number Mailing Address:26 West Dry Creek Circle, Ste. 470, Littleton, CO 80120 Date 06/06/2016 Sign or enter name if filing online) Print Name and Title Cathryn Stewart, Prefect Manager DEP (Fe O 2 5 1O 15 18. 2O 24. 25 3O 33. 35 37. 40 rH 'tDescription Use raphifi Log Sample interval Recovery Odor sar nrin Temporary Well a I Di (F Estimated Ground Surface: 5076.3' 4. --..Locking "J" Ca 3.2' Stickup 5 No samples O' - 24.0' (see boring record for TW-6) 22" 52" 38" NO NO NO M � 411, 4" 44 .406 iil`*' 4. ell .44 4. 4. ll is 4 -'"-Bentonite Chips 4.0' w—'- 8.25" Borehole D -I-Bentonite— Grout A 2" SCH 14. 40 PVC l — 23.57 3.5' . i hP: MF' ; �► Fit M,e �� i F J toy"- F, y;:f c ► air ■1 ray": '4 Stiff, brown, fine to coarse grained SAND, with fine to coarse gravel, damp TOP OF LARAMIE E FM SM • • .. • . : :F, ,4 .k,;Fi :F 1k,! �k,i; Bentoni1e 25.5' �., 1~�t,; +..t+ Pellets 28.7' 3 Stiff, gray —brown CLAYSTONE with fine SAND, damp CL 1' 1 Medium dense, gray -brown, silty fine-grained SAND with rust -color staining, damp SM . • • • ' . • . • • . S --- 1O -2O Washed Silica Sand PTH eet) P O 5 1O 15 2O 25 3O 35 40 SWIFT RIVER ENVIRONMENTAL SERVICES, LEG /00,00#Sielitearisterisieleel Soil Boring Record Location TW—S Coordinates: N 46O186, E 2188715 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By Installation Date February 25, 2O16 SLW Page 1 of 2 DEP (Fe 40 45 50 55 60 65 70 75 80 rH 'rDescription USA r�pF�ic Log Sarnpl Iritervoi Odor spurTemporary .,retWell a DI (F Rrcaver� Medium dense, yellow —brown, fine—grained SAND, moist to very moist SM •• • ' 52" 58" NO NO 4.7'.;. : : H : ; : ; : : : : ; : : :; :; • ; 10-20 Washed Silica Sand :, • •• : • : , ; I.D. PVC Well Screen 0.010„ Slots ...Becomes wet @ 45.5' .- B.T. 0 49.0, 49.0' :PTH eet) 40 45 50 55 60 65 70 75 80 SWIFT RIVER ENVIRONMENTAL SERVICES, EEC Soil Boring Record Location TW-5 Coordinates: N 460186, E 2188715 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By sLiAl Installation Date February 25, 2016 Page 2 of 2 FORM GWS 4/2012 NO 31 WELL CONSTRUCTION STATE OF COLORADO, OFFICE 1313 Sherman St , Ste 821, Main (303) 866-3581 Fax AND OF THE Denver, (303) 866-3589 TEST REPORT I STATE ENGINEER CO 80203 www water state .co.us For Office Use Only 1. WELL PERMIT NUMBER: -;054986 2. WELL OWNER INFORMATION NAME OF WELL OWNER: Waste Management of Colorado MAILING ADDRESS: 2400 West Union Ave CITY: Englewood STATE: CO ZIP CODE:80110 TELEPHONE NUMBER wfarea code: (303) 914-1445 3. WELL LOCATION AS DRILLED. NW 114, NE 1/4, Sec 7 Tarp l 1: N or S, rid Range 66 It E or W .J , DISTANCES FROM SEC. LINES: 610 ft. from L1 N or I S section line and 2510 ft. from gill E or Cpl w section line SUBDIVISION NIA LOT--- , BLOCK --- FILING (UNIT) --- Optional OPS Location: GPS Owner's Well Designation: T -5 Unit must use the following be Datum be NAD83, Unit settings: Format be N, ❑ must be UTM, Units I Zone IF M Zone Ea ti ng --_. must STREET meters, ADDRESS AT must WELL LOCATION: must 40000 set to true Weld County Road 12 or 13 25, Ault, CO 80610 Northing: --- 4, GROUND SURFACE ELEVATION 5076.3 (Est.) feet DRILLING METHOD Hollow Stem Alger DATE COMPLETED 02/25/2016 TOTAL DEPTH 49.1 feet DEPTH COMPLETED 48.7 feet 5. GEOLOGIC LOG: 6. HOLE DIAM (in.) From (ft) To (ft) Depth Type Grain Size Color Water Loc 8.25 { 49.0 0 lo dg Sand, silt, end clay See attached log 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 0.154 +3.2 49.0 PERFORATED CASING: Screen Slot Size 0.010 (in): 2,375 PVC 0.154 28.7 A8.7 _ B. FILTER PACK: 9. PACKER PLACEMENT: Material Silica Sand Type Bentonite Chips Size 10-20 Interval 25.5-48.7 Depth 23.5-25.5 10. GROUTING RECORD Material Amount Density Interval Placement Remarks. _ Grout 6.6 Cu ft --- X4.0-23.5► Tremie Chips 1.4 cu ft --- 0-4.0 Direct t 11. DISINFECTION: Type NA Amt. Used NA 12. WELL TEST DATA: U Check box if Test Data is submitted on Form Number GWS 39 Supplemental Well Test. TESTING METHOD N/A Static Level --- ft. Date/Time measured Production Rate --- — gpm Pumping Level --- ft Date/Time measured --- , Test Length (hrs) --- Remarks: --- 134 I name document of the have read the entered if filing that contains contracting license. statements online) false statements if filing made and herein certified is online the and know the contents in accordance with Rule a violation of section 37-91-108(1)(e), State Engineer considers thereof, 17,4 and they of the Water C , entering of licensed are true to my knowledge. This document Well Construction Rules, 2 CCR R.S ,, and is punishable by fines up to contractor name to be compliance is signed (or 402-2. The filing of a $ 5000 and/or revocation with Rule 17.4 Company Name Swift River Environmental Services, LLC Phone w/area code: (303) 695-4660 License Number: s -- Mailing Address: 26 West Dry Creek Circle, Ste. 4 D, Littleton, CO 80120 Sign 4 enter name if firing online) WC- Cathryn Print Name and Title Stewart, Protect Manager Date 06/06/2016 DEP (Fe 0 5 8. 9. 10 15 18. 20 22. 25 30 34. 35 40 R,�e4verY USC araphis Odor Oda{I SPT TPgc;1We rH `t)IrIIC`�r1 Sample Estimated Ground Surface: 5077+0' re -Locking " J" Ca 3.3' Stickup Stiff, brown (10YR 5/4) silty CLAY, damp CL � e 48" 60" 58" 46" 38" 29" 40" 38" NO NO NO NO NO NO NO NO Bentonite Chips 4+0' 5 5 -8.25" am Borehole Stiff, damp reddish brown, fine-grained sandy SILT, Firm, light brown (10YR 7/4) fine-grained silty, fine-grained SAND, damp • • ••, •••, • • . • . . ' •, ,— 0 -e-Bentonite Grout a Firm, light brown, fine to coarse grained SAND, damp ...fine to coarse gravel 0 28.0' ...free water in 3" layer silty sand @ 31.5' ...large gravel 0 32.5' TOP OF LARAMIE FM S • 2" l.d. SCH 40 PVC Medium dense, gray (10YR 6/2) fine—grained SAND, moist SP SWIFT RIVER ENVIRONMENTAL SERVICES, LLC "OllarlilatSVe Soil Boring Record Location TW-6 Coordinates: N 460181, E 2188691 Drilled By Drilling Engineers Drilling Method HA Logged By PAZ Checked By SLR Installation Date February 24, 2016 Page 1 PTH eet) P a 5 10 15 20 25 30 35 40 of 3 DEP (Fe, 40 45 50 54 55 60 65 70 70 75 80 rH t} ( Description use Crophik Log sample Re..„ Odor SNT Temporary Well Detail DI 0 ...color change to yellowish brown (10YR 6/6 - 10YR 5/4), moist 0 42.0 SP . ; . •, . .. ' , • 45" 60" 60" 60" 55" 60" 58" 60" NO NO NO NO NO NO NO NO r- $.25" Borehole -'�Bentonite Grout 2" i.d. SCH Medium dense, yellow brown (10YR 6/6 10YR 5/4), fine —gained SAND, moist to wet ,0 _ = Dense, yellowish —brown (10YR 6/6 — 10YR 5/4) fine-grained SAND, weakly cemented, damp ...ver stiff, 0ray—brawn, claystone, damp C 6 .5' to 4.8 ...2" gray claystone layer 0 68.0' TOP OF FOX HILLS SM . . ' . ' .. • .. . , ,.. . . ' — - — - 40 PVC 3 Hard, medium gray, CLAYSTONE with sand stringers, fine—grained, damp CL SWIFT RIVER EN VJRONMEHTAL SERVICES, EEC stionsinoti PTH eet) 40 45 50 55 60 65 70 75 80 Soil Boring Record Location TAU' -6 Coordinates: N 460181, E 2188691 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLR+ Installation Date February 24, 2016 Page 2 of 3 I. 441\4 F 4F r4pir 4w, 4F )(\\} Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Date February 24, 2016 Page 3 of 3 FORM NO, GWS-31 4/2012 WELL CONSTRUCTION AND TEST REPORT STATE OF COLORADO, OFFICE OF THE STATE ENGINEER 1313 Sherman St , Ste 821, Denver, CO 80203 Main (303) 866-3561 Fax (303) 866-3589 www.water.state.co.us 1. WELL PERMIT NUMBERIgtHANia6 _ 2. WELL OWNER INFORMATION NAME OF WELL OWNER: Waste Management of Colorado MAILING ADDRESS: 2400 West Union Ave. CITY: Englewood STATE: CO TELEPHONE NUMBER Mamma code: (303) 914-1445 ZIP CODE: 80110 For Office Use Only 3. WELL LOCATION AS DRILLED: W. 1/4, NE 1/4, Sec , 7 T p 7 CSI N or S, El Range 66 It E or DISTANCES FROM SEC. LINES: 615 _ ft from L1 N or ES S section line and 2525 , ft from L 1 E or Ft W section line SUBDIVISION: N/A LOT--- , BLOCK FILING (UNIT) --- Owners Well Designation:1W-S ES Optional O PS Location: O PAS Unit must use the following settings: Format must be UTM, Units must be meters, Datum must be NAD83, Unit must be set to true N, Di Zone 12 or II JZon e 13 STREET ADDRESS AT WELL LOCATION: 40000 Weld County Road 25, Ault, CO 80610 4. GROUND SURFACE ELEVATION 5077.0 (Est.) feet DATE COMPLETED 02/24/2016 TOTAL DEPTH 109.0 5. GEOLOGIC LOG Depth "Spa Grain Size DLo109 Sand, sill, and clay Color Water Loc. See attached log Fasting: -- Northing: DRILLING METHOD Hollow Stem Auger feet DEPTH COMPLETED 108.8 feet B. HOLE DIAM (in.) 8.25 From (ft) To (ft) 0 109.0 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 01154 _ 13.8 93,8 PERFORATED CASING: Screen Slot Size (in): 0.010 2.375 PVC 0.154 93.8 108.8 Remarks. B. FILTER PACK Material Size Interval Silica Sand 10-20 90 5-109.0 9. PACKER PLACEMENT: Type Bentonite Chips Depth 88.0-90.5► 10. GROUTING RECORD Material Amount Density Interval Placement Grout 28,5 cu ft 4.0-88.0 Tremie Chips 1.4 cu ft 0-4.0 Direct 11. DISINFECTION: Type NA 12. WELL TEST DATA Art Used NA Check box if Test Data is submitted on Form Number +SWS 39 Supplemental Well Test. TESTING METHOD NIA Static Level --- ft Date/Time measured: , Production Rate ---- gpm Pumping Level ft. Date/Time measured , Test Length (hrs) -- Remarks: --- 13. I have read the statements made herein and know the contents thereof, and they are true to my knowledge. This document is signed (or name entered if filing online) and certified in accordance with Rule 17.4 of the Water Well Construction Rules, 2 CCR 402-2. The filing of a document that contains false statements is a violation of section 37-91-108(1)(e), C.R.S., and is punishable by fines up to $5000 and}or revocation of the contracting license. If filmy online the State E n9ineer considers enterang of licensed contractor name to be compliance with Rule 17.4 Company Name: Phone w/area code ' License Number Swift River Environmental Services, LLC (303) 695-4660 Mallang Address: 26 West Dry Creek Circle, Ste. 470. Littleton, CO 80120 Sign (or _ enter name if filing online) Print Name and Title Cathryn Stewart, Proyecl Manager Date 06/06/2016 DEP (Fei 0 5 7, 8. 10 15 18. 20 24. 25 29. 30 30. 35 36. 38. 40 Sample Interval Recovery rH 1) Description use Graphic L � Od ar $pT 1�� Temporary Well Detail DI ( F Estimated Ground Surface: 5074.8' ._--'Locking ..J Ca 3.0' Stickup Firm, brown (10YR 5/4) silty CLAY, damp CL /7/ 40" 48" 53" 37" 32" 60" 59" 42" NO NO No NO NO NO NO NO -- Bentonite Chips 4.0' 0 5 - — 8.25" Borehole Stiff, reddish brown (10YR 6/6) clayey SILT with few coarse SAND, damp Firm, tan and brown mottled fine-grained SAND with clay, few coarse sand, damp SM ...... ,` . • ' . , . . • '. ' . 0 --i-Bentonite Grout 0 - Stiff, brown (10YR 5/4) clayey SILT and silty CLAY, damp CL / - 0 A 2" i.d. SCH 40 PVC Medium dense, brown (10YR 5/4) silty fine- grained SAND, damp SM ' -- S Stiff, reddish brown and brown with gypsum mottling CLAY and clayey SILT with minor coarse sand, damp CL 0 3 Medium dense, brown with rust -color staining, fine-grained SAND SP ./ . CL 7 Stiff, gray brown, CLAY, damp7 SWIFT SERVICES, EEC :PTH eet) P 0 5 10 15 20 25 30 35 40 Soil Boring Record Location T-8 Coordinates: N 459177, E 2189389 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLR Installation Date march 1, 2016 Page 1 of 3 DEP (Fe 39 40 43 45 47 50 54 58 60 65 68 70 75 80 rH .t r I I t l'�l t1SC Graphic Lag Sample interval RiCo�e+!' odor sPT „gyp Temporary Well Detail DI F 8 SM . , '. Medium dense, brownish —gray(10YR 6/2), find to coarse SAND with silt, damp TOP OF LARAMIE FM 58" 52" 59" 58" $',, 44{ 42" 59" 60" NO NO NO NO NO NO NOWashed NO 67.0 69.0' 72.0' Medium dense, gray —brown (10YR 6/2), fine—grained SAND, weathered SILTSTONE and silty CLAY, damp SM,/ CL ' ' -8.25„ Borehole' 0 Medium dense, gray -brown (10YR 6/2), silty fine-grained SAND, with fine laminations, damp • . . .. . ' „ •SM . .. . 0 -6-Bentonite_ Stiff, brown and gray, silty CLAY, laminated CL Grout Lignite layer, black, damp OL Dense, medium light gray, fine-grained sandy SILT with thin claystone layers, damp CL 2" Ed. SCH - PVC Bent Vn'te o Pellets ►O:di •k lk I Fik 1► :"*i: ... 4 .F:;Fi. 0Dark ar +r a�a1a eV � +k yi• 4 ak 4:4 .k �! i • .. ;w ,;F., ir ar , 'irr ,0 r r n Y T n gray and black CLAYSTONE ON E and SILTSTONE, fissile, damp ...block thinly laminated coal, dry 0 70.0' try 71.25' •iTI' ' ; : E :;: . : : :;•. : . : :;: . , :; 020 Silica Sand :; : : ; :; 2„l.D. PVC e l l Screen 0.010„ Slots SWIFT • IvFR ENVIRONMENTAL SERVICES„ EEC :PTH eet) 40 45 50 55 60 65 70 75 80 Soil Boring Record Location TW-8 Coordinates: N 459177, E 2189389 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SL1t Installation Date March 1, 2016 Page 2 of 3 DEP (Fe 80 85 90 92. 94. 95 10 10 10 11 11 rH+, !t) 0 Description USC Graphic °� Same a Recovery Odor APT "r4.. Temporary Well Detail a F See X8.0' to 80.0'• ...with thin lignite layers between 84.0' to 89.0'• ...wet zone between 87.0' to 88.0' CL i/f 60" NO NO NO NO 92.0' 104.0' . • . .I.D. • : . . • . . . 2" /2:2/ 59" . : • ' PVC Well Screen 0.010" Slots — 0 Dense, medium gray, clayey fine—grained SAND, damp SM S. • Washed Silica Sand Dense, black, fissile clayey SILTSTONE, saturated, with thin lignite layers throughout ...fine—grained SAND, damp, from 97.5' to 98.0' CL 7 60" //./ 60" — [0 B.T. @ 104.0' )- PTH eet) 80 85 90 95 100 105 110 115 12 120 SWIFT RIVER EWVIR®WMENTAL SERVICES, Lie Soil Boring Record Location TVA -8 Coordinates: N 459177, E 2189389 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLR Installation Date March 1, 2016 Page 3 of 3 FORM GWS-31 4/2012 NO . WELL CONSTRUCTION STATE OF COLORADO, OFFICE 1313 Sherman St., Ste 821, Main (303) 866-3561 Fax AND TEST REPORT OF THE STATE ENGINEER Denver, CO 80203 (303) 866-3589 www water.state.co.us For Office Use Only 1. WELL PERMIT NUMBER: Ha 5,4281; 2. WELL NAME OWNER INFORMATION OF WELL OWNER: Waste Management of Colorado MAILING ADDRESS: 2400 West Union Ave. CITY: Englewood STATE: CO ZIP CODE: 80110 TELEPHONE NUMBER wlarea code: (303) 914-1445 3. WELL LOCATION AS DRILLED:a1/4,, 1 /4 ICIE. 1/4, Sec 7 Twp.7 trgl N or S, flI Range 66 SI E or W qj , DISTANCES FROM SEC. LINES: 1610 ft from 0., N or [ S section line and 1835 ft. from FBI E or .XI W section line. SUBDIVISION: N/A , LOT--- , BLOCK --- FILING (UNIT) --- Owner's Well Designation: T W-8 Optional GPS Location: GPS Unit must use the following settings: Format must be UTM, Units Eason E11 IiI --- must be meters, Datum must STREET ADDRESS AT WELL be NAD83, LOCATION: Unit must be set 40000 Weld to true N, Zone 12 or Zone 13 County Road 25, Ault, CO 80610 Northing: --- 4a GROUND SURFACE ELEVATION 5074.8 (Est.) feet DRILLING METHOD Hollow Stem Auger DATE COMPLETED 03/01/2016 TOTAL DEPTH 104.0 feet DEPTH COMPLETED 92.0 feet 5. GEOLOGIC LOG: G. HOLE DIAM (in.) From (ft) To (ft) Depth T pe Grain Size Color Water Loc. 8.25 0 104.0 0 to 104 Sand, silt, and day See attached log 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 0A54 +3.0 67.0 PERFORATED CASING: Screen Slot Size (in): 0.010 2.375 pvc 0.154 72.0 92. _ 8, FILTER PACK: 3. PACKER PLACEMENT: Material Silica Sand Type Be ruto n ite Chips Size 10-20 Interval 69.0-104.0 Depth 67.0-69.0 0. GROUTING RECORD Material Amount Density Interval Placement Remarks: Grout 21.4 cu ft --- 4.0-67.0 Tremie Chips 1.4 cu ft --- 0-4.0 Direct 11. DISINFECTION: I pe NA Amt. Used N/A 12. WELL TEST DATA: 'Check box if Test Data is submitted on Form Number GWS 39 Supplemental Well Test TESTING METHOD N/A Static Level ft Date/Time Production Rate --- --- measured-. --- , gpm Pumping Level --- ft. Date/Time measured --- Test Length (hrs) --- Remarks: --- 13. I have read the statements name entered if filing online) document that contains false statements of the contracting license. If filing made and certified online herein and know the contents thereof, and they are true to my knowledge. This document in accordance with Rule 17A of the Water Well Construction Rules, 2 CCR. is a violation of section 37-91-108(1)(e), C.R.8., and is punishable by fines up to the State Engineer considers entering of licensed contractor name to be compliance 402-2. is signed (or The filing of a $5000 and/or revocation with Rule 17.4 Company Name Swift River Environmental Services. LLC Phone (303) wfarea code: 695-4660 License Number: --- Mallinu Address: 26 West Dry Creek Circle, Ste. 470, Littleton, CO 80120 Sign (or enter name if ClaAss_ filing online) '- Print Name and Cathryn Stewart, Title Project Manager Date 06/06/2016 DEP (Fei 0 5 10 13. 15 16. 20 21. 25 30 32. 35 39. 40 �,..�' l '► l I I'� USC Graphic Log Sample Interval Recovery sPT Temporary Well Detail a (F [hi+ Odor Estimated Ground Surface: 5073.7' , ---Locking „J„ Ca 2.7' G1 Stickup Firm, brown (10YR 5/4) clayey SILT and silty CLAY, roots in upper 6}', damp CL (//7/. c/ // 34" 57" 52" 51" 48" 32" 33" „ 26 NO NO NO NO NO NO NO NO --Bentonite Chips 4.0' -'- X3.25„ Borehole 0 Firm, reddish brown ( 10YF 6/6) clayey SILT with fine-grained sand, damp $ —Bentonite Grout Stiff, tan (10YR 7/4) fine-grained sandy CLAY, damp • 2" i.d. SCH 40 PVC Medium dense, light brown (10Yf 6/6) and tan mottled, silty fine-grained SAND with clay minor medium coarse sand and fine gravel, damp , SM , . • I. • • ... . '. ' . • ., . I •: • -� 6,5 iF,..►y v ;0C4, k 4k E;0 :4 Illgl Jlik ► it 1 5,; Si 1 i4 eLliO ► -•-Bentonite Pellets T 2907 5 10-20 32.0' Washed Medium dense, reddish brown (5YR 6/4) fine —coarse SAND with fine gravel, damp ...large grovel, slightly moist 0 38.0' OF LARAMIE FM Silica Sand o 2„ I.D. PVC Well `S'j'c[fr�een See 40.0 to 46.8' CL ,/ Slots SWIFT RIVER LNV/R0NMENTAL SERVICES, EEC PTH eet) p 0 5 10 15 20 25 30 35 40 Soil Boring Record Location TW-9 Coordinates: N 458233, E 2189754 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Date February 29, 2016 Page 1 of 2 DEP (Fe 40 45 46. 50 55 60 65 70 75 80 USC trLag ic Sample Interval Odor S Temporary Well Detail D 0 I rH �# Description Reca,nery ...becomes irm, saturated @ 40.75' Very stiff, brown, mottling, damp black gray clay CLAY with with coal, rust —color CL 59" 58" NO NO 10-20 Washed Silica Sand 2" I.D. PVC Well 3 Gray brown with rust —color mottling, weathered CLAYSTONE, damp 47.0 Screen 0.010" Slots B.T. O 49,0' 49.0' SWIFT RIVER ENVIRONMENTAL SERVICES, Lie PTH eet) 40 45 50 55 60 65 70 75 80 Soil Boring Record Location TW-9 Coordinates: N 458233, E 2189754 Drilled By Drilling Engineers Drilling lethcd HSA Logged By PAZ Checked By SL1 Installation Date February 29, 2016 Page 2 of 2 MAILING ADDRESS:240O West Union Ave. CITY: Englewood STATE: CC TELEPHONE NUMBER Mama code: (303) 914-1445 ZIP CODE: 80110 For Office Use Only 3. WELL LOCATION AS DRILLED: Sk_i_V 1/4, NE 1/4, Sec , 7 Twp L N N or S, DI Range 66 ISI E or W DISTANCES FROM SEC. LINES: 2560 ft. from n N or II S section line and 1455 ft. from SUBDIVISION: N/A , LOT --- BLOCK --- FILING (UNIT) --- Optional GPS Location: GPS Unit must use the following settings: Format must be UTM, Units must be meters, Datum must be NAD$3, Unit must be set to true N, DI Zone 12 or RE ] Zone 13 E or E3 W section line, Owner's Well Designation: TW-9 Easting STREET ADDRESS AT WELL LOCATION: 40000 We'd County Road 25, Ault, CO 80610 Northing: --- 4. GROUND SURFACE ELEVATION 5073.7 (Est.) feet DRILLING METHOD Hollow Stem Auger DATE COMPLETED 02/29/2016 TOTAL DEPTH 49 feet DEPTH COMPLETED 47.0 feet 5. GEOLOGIC LOG: Depth T •e Grain Size 6. HOLE DIAM (in.) From (ft) Color _ Water Loc 8,25 Sand, silt, and clay 49.0 To (ft) 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 0.154 +2.7 32.0 PERFORATED CASING: Screen Slot Size (in): 0.010 2.375 P' 0.154 32.0 47.0 84 FILTER PACK: Material Silica Sand Size 10-20 Interval 29.0- 9.0 9. PACKER PLACEMENT: Type Bentonite Chips Depth 26.5-29M Remarks 0. GROUTING RECORD Material Amount Density Interval Grout 7.7 cu ft --- 4.0-26.5 Placement Tremie Chips 1.4 cu ft --- 0-4.0 Direct 11. DISINFECTION: Type NA a Amt. Used N/A 12. WELL TEST DATA: IP Check box if Test Data is submitted on Form Number GWS 39 Supplemental Well Test. TESTING METHOD N/A Static Level --- ft. Date/Time measured: --- , Production Rate --- gpm Pumping Level ft. Date/Time measured — , Test Length (firs) --- Remarks: --- 13. I have read the statements made herein and know the contents thereof, and they are true to my knowledge. This document is signed (or name entered if filing online) and certified in accordance with Rule 17.4 of the Water Well Construction Rules, 2 CCR 402-2. The filing of a document that contains false statements is a violation of section 37-91-108(1)(e), C.R.S., and is punishable by fines up to $5000 and/or revocation of the contracting license. If filing online the State Engineer considers entering of licensed contractor name to be compliance with Rule 17.4 Company Name: Phone wiarea code License Number Swift River Environmental Services, LLC (303) 695-4660 Mailing Address: 26 West Dry Creek Circle, Ste. 470, Littleton, CO 80120 Sign ( enter name if filing online) Print Name and Title a' V&A. Cathryn Stewart, Project Manager Date 06/06/2016 DEP (Fe 0 5 10 13. 15 17, 20 25 27. 29. 30 35 40 Description Interval 4v7 Temporary Well Detail DEPTH (Feet) rH `•t) uSC GrL ,c Odor S Estimated Ground Surface: 5073.2' a--"��Locking J Cap 2.5' I Stickup Firm, brrwn10YR 5/4) silty CLAY and/ clayey SILT, roots in upper 6 , damp CL ///: ///./ 36" 60" 52" 49" 48" 36" 27" 21" NO NO NO NO NO NO NO NO . -a-Bentonite Chips 0 4.0' - '- 8.25" Borehole - 5 10 Stiff, reddish brown clayey SILT with fine to coarse mottled, damp — 5 Benton ite 15 Grout Stiff, tan (10YR 7/4) clayey fine-grained SAND, damp SC ... • .. • ; ' •, . • . • — 20 2" 14. SCH 40 PVC — 25 3 0 Medium dense, fine to coarse SAND with fines gravel, damp SW Medium dense, reddish brown (5YR 6/4) fine to coarse SAND with fine gravel, damp ...becomes saturated C, 40.0' — 30 35 40 SWIFT RIVER ENVIRONMENTAL SERVICES, LAC Soil Boring Record Location TW-10 Coordinates: N 458255, E 2189760 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Date February 26, 2016 Page 1 of 3 DEPTH (Feet) USC Description Graphic Log Sample Interval Recovery Odor SPT Temporary Well Detail DEPTH (Feet) 4400.3 43.0 44.0 45 48.8 50 52.3 55 57.0 60 60.5 61.5 65 67.0 69.0 70 73.0 75 80 CL SM CL SM CL SM CL OL SP CL SM TOP OF LARAMIE FM Stiff, gray -brown CLAY with fine-grained sand, damp Dense, gray -brown 10YR 6 2 moderately cemented fine -•rained SAND tams Stiff, brown -gray (10YR 4/2) CLAY, damp Very hard, gray (5YR 6/1) fine-grained, well cemented SANDSTONE, damp Stiff, brown (10YR 5/4) with rust -color mottling CLAY Stiff, brown -gray with rust -color mottling and some black layers, weathered CLAYSTONE, blocky structure, damp Medium dense, brown, silty ine-grained SAND dam Stiff, brown black weathered CLAYSTONE, damp Black brown, lignite seam, damp Medium dense, gray brown (10YR 6/2) fine- grained SAND Medium dense, gray, fine-grained sandy SILT damp to moist ...brown silty weathered CLAYSTONE @ 69.0' to 69.25' and 70.25' to 73.0' Medium dense, medium gray (N5), fine- grained SAND with silt, damp to slightly moist SWIFT RIVER ENVIRONMENTAL SERVICES, EEC Pr 49" 60" 30" 60" 47" 60" 60" 60" NO NO NO NO NO NO NO NO 71.2' 73.8' 77.5' -d-8.25" Borehole --Bentonite Grout -2" i+d, SCH 40 PVC s Bentonite Pellets 10-20 Washed Silica Sand 2" I.D. PVC Well Screen 0.010" Slots 40 45 50 55 60 65 70 75 80 Soil Boring Record Location TW-10 Coordinates: N 458255, Drilled By Drilling Engineers Logged By PAZ Installation Date February 26, 2016 E 2189760 Drilling Method NSA Checked By SLW Page 2 of 3 Soil Boring Record Location TUB -10 Coordinates: N 458255, E 2189760 Drilled By Drilling Engineers Drilling Method HSA Logged By PAZ Checked By SLW Installation Date February 26, 2016 Page 3 FORM NO. GWS-31 4/2012 WELL CONSTRUCTION AND TEST REPORT STATE OF COLORADO, OFFICE OF THE STATE ENGINEER 1313 Sherman St Ste 821, Denver, CO 80203 Main (3031866-3581 Fax (303) 866-3569 vvww water stale co. us 1, WELL PERMIT NUMBER: 2. WELL OWNER INFORMATION NAME OF WELL OWNER: Waste Management of Colorado MAILING ADDRESS: 2400 West Union Ave CITY: Englewood STATE: CO ZIP CODE:80110 TELEPHONE NUMBER, wfarea code: (303) 914-1445 For Office Use Only 3. WELL LOCATION AS DRILLED: S‘d_i_IV 114, J 1/4, Sect, 7 T p 7 i N or 5, n Range 66 Ell E or W DISTANCES FROM SEC, LINES: 2550 ft. from IF N or CI S section line and 1450 ft, from WI E or 11 W section line. SUBDIVISION: N/A , LOT --- I BLOCK ---_ FILING (UNIT) Optional +BPS Location: GPS Unit must use the following settings: Formal must be UTM, Units Owner'Well Destgrta(ol� -�o must be meters, Datum must be NADB3, Unit must be set to true N, Lii Zone 12 or IPl Zone 13 Eastung` STREET ADDRESS AT WELL LOCATION: 40000 Weld County Road 5, Ault, CO 80610 Northing: --- 4. GROUND SURFACE ELEVATION 5073,2 (Est.) feet DRILLING METHOD Hollow Stem Auger DATE COMPLETED 02/26/2016 TOTAL DEPTH 98.5 feet DEPTH COMPLETED 97.5 feet 5. GEOLOGIC LOG: Depth Type Grain Size Color 6. HOLE DIAM(in ) Water Loc.. 8.25 0 109135 Sand, sill, and day See attached log From (ft) To (ft) { 98.5 7. PLAIN CASING: OD (in) Kind Wall Size (in) From (ft) To (ft) 2.375 PVC 0,154 +2.5 77.5 PERFORATED CASING: Screen Slot Size (in); 0.010 2.375 PVC 0.154 77.5 97.5 8. FILTER PACK: Material Sand Size 10-20 Interval 73.8-98,5 9. PACKER PLACEMENT: Type Bentonite Chips Depth 71.2-73.8 Remarks: 10. GROUTING RECORD Material Amount Density Interval Placement Grout 22.9 cu ft --- 4.0-71.2 Trem i e Chips 1.4 cu ft --- 0.4.0 Direct 11. DISINFECTION: Type NA 12. WELL TEST DATA: E1 Check box if Test Data is submitted on Form Number GWS 39 Supplemental Well Test. Amt. Used N/A TESTING METHOD N/A Static Level --- ft. Date/Time measured: , Production Rate --- Pumping Level ft. Date/Tire measured --- , Test Length (hrs) - Remarks: --- gpm 13. I have read the statements made herein and know the contents thereof, and they are true to my knowledge. This document is signed (or name entered if filing online) and certified in accordance with Rule 17.4 of the Water Well Construction Rules, 2 CCR 402-2. The filing of a document that contains false statements is a violation of section 37-91-108(1)(e), C.R.S., and is punishable by fines up to $5000 and/or revocation of the contracting license. If filing online the State Engineer considers entering of licensed contractor name to be compliance with Rule 17.4 Company Name. Swift River Environmental Services, LLC Phone wlarea code: License Number: (303) 695-4660 Mailing Address: 26 West Dry Creek Circle, Ste. 470, Littleton, CO 80120 Sign (or enter name if filing online) cakAt tratribihr rte-_ y Print Name and Title Date Cathryn Stewart, Project Manager I 06/06/2016 Hello