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Home My WebLink About20230294.tiffMariah Higgins From: Sent: To: Cc: Subject: Attachments: Follow Up Flag: Flag Status: Kim Ogle Wednesday, January 11, 2023 4:37 PM CTB Esther Gesick FW: USR-1582 Soil Sampling Summary 2022 Report AurorallorthCampus_SoilSamplingSummaryRpt_Dec2O22.pdf Follow up Flagged Please add to the case file for Aurora Water, USR-1582 Thank you Kim Ogle Principal Planner Weld County Planning Services 970.400.6100 Office 970.400.3549 Direct kogle@weldgov.com Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Daigle, Tom <TDaigle@geiconsultants.com> Sent: Monday, January 9, 2023 7:04 AM To: Dan Joseph <djoseph@weldgov.com>; Maxwell Nader <mnader@weldgov.com>; Kim Ogle <kogle@weldgov.com>; Chris Gathman <cgathman@weldgov.com> Cc: Lee, Jason <jjlee@auroragov.org>; Neff, Jesse <jneff@geiconsultants.com> Subject: USR-1582 Soil Sampling Summary 2022 Report Caution. This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello Dan, Max, and Kim, On behalf of the City of Aurora, I am providing the attached 2023 Soil Sampling and Monitoring Summary Report for the Aurora Water North Campus Aquifer Recharge and Recovery Site A in Fort Lupton, CO. This report is provided to satisfy condition 3B of the USR Permit for the Prairie Waters Project (USR-1582). I called the Planning Department on January 3, 2023 and received a call-back and voicemail from Chris Gathman last week who provided your contact information as the recipients of this report. Background: In January 2012, a Soil Sampling and Monitoring Work Plan was developed to satisfy condition 3B of the permit stating that soil samples will be collected from 10 locations across the Site and will be analyzed for Toxicity Characteristic Leaching Procedure (TCLP) of the Resource Conservation Recovery Act (RCRA) 8 metals. Baseline soil sampling was conducted in 2012 and annual sampling was conducted for the first five years of Site operation from 2013- 2017. Previous reports have been submitted to Weld County Planning Dept. via email. The 2022 sampling event CORRUn;Ccxshic/15 0/30/23 2023-0294 PL- 19 25 represented the first event conducted at the 5 -year frequency following the initial 5 -year annual sampling. The results do not indicate that metals are accumulating in soils. Therefore, the next sampling events are scheduled for 2027 and 2032. If there is still no evidence of metals accumulation in soils after 20 years, the City will submit a final report to the Weld County Department of Public Health and Environment (WCDPHE). Please let me know if you have any questions. --Tom TOM DAIGLE, P.G. GEI Senior Project Manager 781.721.4000 cell: 339.221.3499 400 Unicorn Park Drive, Woburn, MA 01801 ®fyinIJ 2 GEI Consulting Engineers and Scientists Consultants Soil Sampling and Monitoring Summary Report Aurora Water North Campus Aquifer Recharge and Recovery Site A Fort Lupton. Colorado Submitted to: Aurora Water 15151 E. Alameda Parkway Aurora, CO 80012 Submitted by: GEI Consultants, Inc. 4601 DTC Boulevard, Suite 900 Denver, CO 80237 December 13, 2022 Project 2203242 Thomas Daigle, P.G. Project Manager Project Scientist esse Ne NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Table of Contents 1. Introduction 1-1 1.1 Background 1-1 1.2 Previous Soil Sampling and Monitoring Activities 1-1 2. Field Activities 2-1 2.1 Utility Clearance 2-1 2.2 Soil Boring Program 2-1 2.3 Soil Sampling Program 2-1 2.4 Field Observations 2-2 2.5 Laboratory Testing 2-3 2.6 Quality Assurance / Quality Control (QA/QC) 2-3 2.7 Decontamination 2-3 2.8 Investigation -Derived Waste 2-4 2.9 Surveying 2-4 3. Sample Results 3-1 3.1 Analytical Results 3-1 3.2 Data Management and Validation 3-1 3.3 Data Evaluation 3-1 3.4 Future Sampling and Data Analysis 3-2 4. Conclusions 4-1 5. References 5-1 List of Tables Table 1: Summary of Sampling Rationale and Analyses, City of Aurora North Campus Aquifer Recharge and Recovery Site, Aurora, Colorado 2-6 Table 2: ARR Summary Data Table 3-3 List of Figures Figure 1: Prairie Waters ARR Site A Location Map 1-2 Figure 2: Sampling Locations 2-5 List of Appendices Appendix A: Boring Logs Appendix B: Laboratory Analytical Report Appendix C: Data Validation Summary Report Table of Contents I i NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Acronym and Abbreviations Used in This Report Ag Silver ARR Aquifer Recharge and Recovery As Arsenic Ba Barium bgs Below Ground Surface Ca Cadmium City City of Aurora Cr Chromium EPA U.S. Environmental Protection Agency ft Feet ft bgs Feet Below Ground Surface GEI GEI Consultants, Inc. Hg Mercury LPB Low Permeable Barrier MDL Method Detection Limit mg/L Milligrams per Liter Pb Lead PPE Personal Protective Equipment QA/QC Quality Assurance/Quality Control QAPP Quality Assurance Project Plan RCRA Resource Conservation Recovery Act RL Reporting Limit Se Selenium Site Fort Lupton, Colorado TCLP Toxicity Characteristic Leaching Procedure UNCC Utility Notification Center of Colorado USR Use by Special Review USR-1582 Prairie Waters Project WCDPHE Weld County Department of Public Health and Environment GEI Consultants, Inc. Table of Contents I ii NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 1. Introduction On behalf of City of Aurora (City) GEI Consultants, Inc. (GEI) conducted soil sampling and monitoring at the Aurora Water Prairie Waters North Campus Aquifer Recharge and Recovery (ARR) Site A located in Weld County in Fort Lupton, Colorado (Site). The sampling was conducted in order to satisfy Condition 3B of the Weld County Use by Special Review (USR) Permit for the Prairie Waters Project (USR-1582). The purpose of the sampling is to assess if metals are accumulating in soils within the Low Permeable Barrier (LPB) boundary at the Site. The Site is located at 2962 County Road 23, Fort Lupton, CO 80621; west of the South Platte River and East of Big Dry Creek (Fig. 1). 1.1 Background In January 2012, a Soil Sampling and Monitoring Work Plan (Work Plan) was developed to address Weld County's concerns about metals accumulating at the Site (CH2M HILL, 2012). The January 2012 Work Plan states that soil samples will be collected from 10 locations within the LPB boundary and will be analyzed for Toxicity Characteristic Leaching Procedure (TCLP) of the Resource Conservation Recovery Act (RCRA) 8 metals. Baseline soil sampling was conducted in 2012. In accordance with the Work Plan, the City collected soil samples from the same 10 locations on an annual basis for the first 5 years of Site operations. Baseline samples were collected prior to the start of site operations in 2012. The 2017 sampling activities represented the fifth and final year of the initial 5 -year annual sampling program approved by WCDPHE. In 2017, GEI concluded that TCLP RCRA 8 metals were not accumulating in soils within the LPB at the Site and recommended moving to a five-year sampling interval as allowed in the approved sampling plan (CH2M HILL, 2012). Current sampling activities in 2022 represent the first sampling event conducted at the 5 -year frequency. If there is still no evidence of metals accumulation in soils after 20 years, the City will submit a final report to the Weld County Department of Public Health and Environment (WCDPHE). Future sampling events are scheduled for 2027 and 2032. 1.2 Previous Soil Sampling and Monitoring Activities In March 2012, CH2M Hill conducted the first round of soil sampling at 10 locations within the Site LPB boundary to establish baseline concentrations of RCRA 8 metals using TCLP analysis within the Site's shallow groundwater zone (CH2M Hill, 2012). The initial sampling event was conducted prior to initiating Site operations using a direct push drill rig. Shallow groundwater was generally encountered at approximately 9 to 19 feet below ground GE1 cos..„ Introduction 11-1 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 surface (bgs) and sample depths ranged from 15 to 30 feet bgs. Baseline sample results did not indicate the presence of any RCRA 8 metals using TCLP analysis at concentrations above the laboratory reporting limit. Subsequent annual sampling during the first five years of operation from 2013 through 2017 did not indicate the accumulation of any RCRA 8 metals using TCLP analysis. GEI Consultants, Inc. Introduction 11-2 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 ARR SITE A PROPERTY BOUNDARY NOTES: 1. Figure from Soil Sampling and Monitoring Summary Report, City of Aurora, Aquifer Recharge and Recovery Site, Fort Lupton, Colorado. May 2012. CH2M Hill. E 14BthAve CR4 114 CR2112 (IR21/h 2 0)7 " COO U COO reel a Legend -- AM 9TEALPBtt.: 0,J1€t4T O4 _ LUW ItJtAtPtLf= KA44141H. APR :A OUFEP RE'CtAF4=- MID '- -nEF'e Soil Sampling and Monitoring Summary Report North Campus ARR Site A Soil Monitoring Fort Lupton, Colorado Aurora Water Aurora. Colorado GEI Consultant% Project 2203242 PRAIRE WATERS ARR SITE A LOCATION MAP December 2022 Fig. 1 B Working.AURORA. CITY OF*2203242 Aurora North Campus Sampling 20221GIS,Fig 1_2022.mxe Fig. 1: Prairie Waters ARR Site A Location Map GEI Consultants. Inc. Introduction 1-3 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 2. Field Activities All field activities were conducted in accordance with the Soil Sampling and Monitoring Work Plan including the site -specific Health and Safety Plan and Quality Assurance Project Plan (QAPP) prepared by GEI (GEI, 2017). 2.1 Utility Clearance GEI retained Site Services Drilling, LLC of Golden, Colorado to perform the subsurface investigation. At least 72 hours prior to performing subsurface work, GEI contacted the Utility Notification Center of Colorado (UNCC) to identify any underground utilities on the Site. Site Services Drilling and GEI also coordinated with Jason Lee (City of Aurora Prairie Waters Utility Supervisor) to identify any other utilities not located by UNCC. Boring locations were pre -marked by City surveyors and an on -site utility meeting was held on October 25, 2022. All utilities were cleared by UNCC and drilling activities were conducted between November 1 — 2, 2022. 2.2 Soil Boring Program Between November 1 — 2, 2022, Site Services Drilling advanced ten soil borings at the Site using a Geoprobe® direct push drilling rig and solid stem augers. Soil borings were advanced in the same locations as the previous years (or as close as practically possible while maintaining sample integrity) in accordance with the sampling plan approved by WCDPHE. The locations of the soil borings are illustrated in Fig. 2. Sampling rationale and target depths are summarized in Table 1. Soil cores were collected continuously at 5 -foot intervals from the ground surface to the boring termination depth using a Geoprobe® Macro -Core® sampling device with dedicated acetate liners. The acetate liners were cut open at the surface to expose the soil profile and detailed descriptions of the soil at each boring were recorded on individual boring logs, provided in Appendix A. Soils were classified in accordance with the Unified Soil Classification System and all cores were inspected for gross contamination by visual and olfactory observations. No evidence of gross contamination was observed in any of the soil borings. Soil borings were backfilled with hydrated bentonite chips, sand, and/or cuttings upon completion. Metal t -post stakes were returned to each location upon completion of backfilling to identify the sample site for future sampling events. 2.3 Soil Sampling Program One soil sample was collected from each of the ten boring locations for laboratory analysis. Samples were collected by extracting soil from a one -foot long section of the acetate liner across the target sample depth interval. In circumstances where direct push methods resulted E I Consultants Field Activities I 2-1 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 in refusal or no recovery, soil samples were collected from the cuttings produced by 3 -inch outer diameter solid stem augers that were advanced through the target sample depth. Soil samples were placed in a laboratory -provided unpreserved 32 -ounce glass jar. Samples were labeled, documented on a chain of custody, placed on ice in a cooler, and delivered to the laboratory at the completion of field activities. Soil sampling target depths were specified in the initial Soil Sampling and Monitoring Summary Report prepared by CH2M Hill in 2012. The target sample depth was achieved at all ten locations during 2012 drilling and sampling. All samples were collected below the observed water table in the saturated zone. 2.4 Field Observations GEI met with Site Services Drilling and the Site supervisor on November 1, 2022, to begin the soil investigation. The Site supervisor provided access to each boring location and provided Site knowledge about utility locations. All ten borings were completed between November 1 — 2, 2022. Boring logs and detailed soil descriptions are provided in Appendix A. Soil conditions encountered across the Site ranged from tight clays to dense sand and gravel. In general, higher portions of silt and clay were encountered in shallow soils above the water table with more coarse -grained widely -graded sand and gravel present in the saturated zone generally below a depth of about 10 feet. Groundwater was encountered between 12 and 17 feet bgs. All samples were collected below the observed water table in the saturated zone. Soils encountered in this year's investigation were dense, which is similar to previous years. Locations ARR-5, ARR-8, and ARR-10 did not yield soil recovery using direct push methods within the target sampling depth and soil samples were collected from the cuttings produced by 3 -inch outer diameter solid stem augers as described in Section 2.3 above. GEI Consultants, Inc. Field Activities 12-2 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 2.5 Laboratory Testing Laboratory analysis was performed by Pace Analytical located in Mount Juliet, Tennessee. Pace Analytical is certified by The NELAC Institute. Samples were analyzed for TCLP RCRA 8 metals by U.S. Environmental Protection Agency (EPA) Method 1311 / 6010 / 7471 that include: Silver (Ag) Arsenic (As) • Barium (Ba) • Cadmium (Ca) • Chromium (Cr) • Mercury (Hg) • Lead (Pb) • Selenium (Se) The 2022 Analytical Report from Pace Analytical is provided in Appendix B. 2.6 Quality Assurance / Quality Control (QA/QC) QA/QC samples including one field duplicate and two equipment blanks were collected during the soil sampling program. QA/QC samples were collected to evaluate the quality and consistency of the data and allow confirmation that field and laboratory performance requirements were met. One blind field duplicate was collected from the sample at ARR-7 by collecting the parent sample then splitting the soil volume equally between two sample jars. One equipment blank was collected by running deionized water through the steel shoe of the Geoprobe® Macro - Core® sampling core barrel. The deionized water was collected in a laboratory -provided 1 - liter unpreserved glass jar. The purpose of the equipment blank is to ensure that the down - hole sampling equipment has been properly decontaminated between borings. QA/QC analysis did not indicate any deviations that would affect the interpretation of the primary data. A data validation report and summary of the QA/QC data is provided in Appendix C. 2.7 Decontamination Decontamination procedures were outlined in the work plan and included cleaning the Geoprobe® Macro -Core® drill stem between borings to minimize cross -contamination of soil samples. Disposable sampling tools were used to collect samples from the acetone liners and did not require decontamination. When solid stem augers were required to complete the boring the augers were decontaminated to minimize cross -contamination of the soil samples. GEI Consultants, Inc. Field Activities 12-3 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 2.8 Investigation -Derived Waste Investigation -derived waste generated during the field sampling activities included soil cuttings, decontamination water, decontamination materials (such as paper towels, buckets), personal protective equipment (PPE), and disposable sample supplies (such as acetate liners). Gross contamination was not observed during drilling activities (i.e., soil staining, petroleum or chemical odors, etc.) and the soil cuttings and decontamination water were disposed on the ground surface at least 50 feet away from the boring locations. PPE and disposable sampling supplies (gloves, acetate liners) were handled as routine waste and were disposed of by Site Services Drilling. 2.9 Surveying All soil borings were surveyed and staked using steel T -Posts in 2013 by City personnel. GEI installed each boring within approximately one to three feet of the surveyed locations and re-inserted the steel survey stakes upon completion of drilling. Future borings are anticipated to be installed within a few feet of the staked boring locations from previous sampling activities. GEI Consultants, Inc. Field Activities 12-4 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 NOTES: In Northwest Infiltration ARR, Basini - 1. Figure from Soil Sampling and Monitoring Summary Report, City of Aurora. Aquifer Recharge and Recovery Site Fort Lupton, Colorado. May 2012. CH2M Hill. -eS-1.11. gee. p N A ' Ire 0 I%G Flew ■ ■' legend * So. Srplsg L.ocs-o•+. Oi r c as Walt r1 Recover Mos P. sr— fl.r, far.r� FOG, lit GIS. IS! sir is Prig Una Pa 3TtE A (P6 ALR3MlliBrT Soil Sampling and Monitoring Summary Report North Campus ARR Site A Soil Monitoring Fort Lupton, Colorado Aurora Water Aurora. Colorado ►v GEI Consultants Project 2203242 SAMPLING LOCATIONS December 2022 Fig. 2 B +WorkingAURORA, CITY OF'2203242 Aurora North Campus Sampling 2022SGIS‘Fig 2_2022.mxd Fig. 2: Sampling Locations GEI Consultants, Inc. Field Activities 2-5 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Table 1: Summary of Sampling Rationale and Analyses, City of Aurora North Campus Aquifer Recharge and Recovery Site, Aurora, Colorado Location ID Sample Name Sample Media Sample Location Target Sample Interval (ft bgs) Actual Sample Interval (ft bgs) Sample Location Surface Elevation (ft) Sample Type Rationale Analysis ARR-1 ARR-I-SO-1516-110122 Soil 9 ft north of A-10 15-16 15-16 4931.31 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-2 ARR-2-SO-2324-110122 Soil 24 ft east of A-16 23-24 23-24 4926.18 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-3 ARR-3-SO-2324-110222 Soil 25 ft north of A-22 23-24 23-24 4921.12 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-4 ARR-4-SO-2930-110222 Soil 50 ft northeast of A-26 29-30 29-30 4923.47 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-5 ARR-5-SO-2728-110122 Soil 44 ft southwest of A-5 27-28 27-28 4939.35 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010Cl7470A) ARR-6 ARR-6-SO-2324-110122 Soil 16 ft south of A-8 23-24 23-24 4934.91 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-7 ARR-7-SO-1920-110122 Soil 105 ft southeast of A-13 19-20 19-20 4931.82 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-7 FD -SO -110122 Soil 105 ft southeast of A-13 19-20 19-20 4931.82 Duplicate Show precision in field sample collection techniques TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-8 ARR-8-SO-2729-110222 Soil 32 ft east of A-3 27-28 27-29 4928.37 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-9 ARR-9-SO-1920-110122 Soil 108 ft southeast of A-4.1 19-20 19-20 4931.07 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) ARR-10 ARR-10-SO-1920-110122 Soil 89 ft southeast of A-1 19-20 19-20 4933.69 Primary Determine if metals are accumulating in soils located with the ARR Site A LPB boundary soils TCLP Metals (EPA Methods 1311/6010C/7470A) Notes: See Fig. 2 for sampling locations. ft —feet bgs — below ground surface ARR —Aquifer Recharge and Recovery LPB — low -permeable barrier EPA — U.S. Environmental Protection Agency GEI Consultants, Inc. Field Activities 12-6 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 3. Sample Results 3.1 Analytical Results Soil samples collected from all 10 borings at the Site are considered representative of native soil conditions within the saturated zone near the immediate cone of depression surrounding select pumping wells. Soil samples were extracted in the laboratory for TCLP analysis of RCRA 8 metals (As, Ba, Cd, Cr, Pb, Hg, Se, and Ag). The laboratory reporting limit (RL) for all eight metals was set below the TCLP screening levels published by the EPA. No metals were detected above the RL in any sample except for barium (Table 2). Barium was detected in all 10 samples at low concentrations that are within the same order of magnitude as prior observations. All detections of barium remained well below the TCLP screening level published by the EPA. Analytical results are summarized in Table 2 and are compared to TCLP limits. A copy of the laboratory analytical report is provided in OB. 3.2 Data Management and Validation Data were provided by Pace Analytical in electronic format and were imported into GEI's EQuIS database management system. Data were validated using the criteria established in the QAPP that was included in the 2017 Work Plan (GEI, 2017). A data validation summary report is provided in 0C and concludes that all data are valid. 3.3 Data Evaluation Data collected in November 2022 indicate that TCLP metal concentrations are generally the same as were reported from the previous five year's sampling events (Table 2). Most metals are historically non -detect above laboratory reporting limits, however, some metals such as barium, chromium, lead, and mercury have historically been observed at low concentrations and most previous detections were qualified `J' by the laboratory indicating that the results are below the RL, but above the MDL and are considered approximate. Concentrations of barium were observed above the RL in all 10 samples in 2022, however, the magnitude of concentrations is similar to historical observations and does not suggest accumulation of barium in the soils. GEI did not perform a statistical analysis to assess whether a statistically significant change in the TCLP results can be seen due to the very low concentrations of metals detected and the historical laboratory `J' qualifier indicating the values are approximate. Performing a statistical analysis on approximate data would not yield a high level of confidence in the statistical test results. GEL._ Sample Results 13-1 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Given the extremely low levels of metals detected, and the generally similar concentrations this year compared to previous years, GEI concludes that RCRA 8 metals are not accumulating in soils within the LPB at the Site based on TCLP analysis. 3.4 Future Sampling and Data Analysis This year marks the 10 -year sampling event. Baseline sampling was performed in 2012 prior to facility operation and five consecutive annual sampling events were performed from 2013 through 2017. Current sampling in 2022 marks the first of three 5 -year sampling events in accordance with the approved work plan. Only barium was detected above the laboratory reporting limits in 2022. Historically, when detections have occurred, they have been qualified `J' by the laboratory indicating that the results are below the RL, but above the MDL and are considered approximate. Therefore, a statistical analysis of the data is not considered viable. The 10 -year analytical data indicates that there is no evidence of accumulation in soil of TCLP 8 metals within the LPB. Therefore, sampling frequency continue once every 5 years up until a 20 -year total duration as indicated in Section 1.1. The next sampling event is scheduled for 2027 and analytical results will be compared to the EPA TCLP regulatory levels. Unless future data indicate an increase in TCLP concentrations for RCRA 8 metals, subsequent sampling events will occur in 2027 and 2032, at which point the sampling program will be complete. GEI Consultants, Inc. Sample Results 13-2 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Table 2: ARR Summary Data Table Chemical Name Units Arsenic mg/L Barium mg/L Cadmium mg/L Chromium mg/L Lead mg/L Mercury mg/L Selenium mg/L Silver mg/L TCLP Limit (mg/L) 5 100 1 5 5 0.2 1 5 Location Sample Date Sample Interval (ft) ARR-01 3/7/2012 15-16 < 0.50 0.15 JB < 0.10 0.036 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-01 10/10/2013 16-17 < 0.50 0.11 J < 0.10 0.0067 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-01 10/7/2014 15-16 < 0.50 0.30 JB < 0.10 0.0072 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-01 9/17/2015 14.5-15.5 • < 0.50 0.25 J < 0.10 < 0.050 0.013 J < 0.0020 < 0.10 < 0.50 ARR-01 9/27/2016 15-16 < 0.50 < 1.0 < 0.10 0.0052 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-01 10/12/2017 16-17 < 0.10 < 1.0 < 0.10 0.0054 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-01 11/1/2022 15-16 < 0.10 0.215 J+ < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 <0.10 ARR-02 3/6/2012 23-24 < 0.50 0.19 JB < 0.10 0.0095 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-02 10/11/2013 23-24 < 0.50 0.12 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-02 10/7/2014 23-24 < 0.50 0.20 JB < 0.10 < 0.50 0.066 J < 0.0020 0.040 JB < 0.50 ARR-02 9/18/2015 22-23 < 0.50 0.099 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-02 9/27/2016 23-24 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-02 10/12/2017 23-24 < 0.50 < 1.0 < 0.10 0.0037 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-02 11/1/2022 23-24 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 < 0.10 ARR-03 3/6/2012 23-24 < 0.50 0.25 JB < 0.10 0.027 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-03 10/11/2013 23-24 < 0.50 0.16 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-03 10/8/2014 23-24 < 0.50 0.25 JB < 0.10 0.0062 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-03 9/18/2015 23-24 < 0.50 0.28 J < 0.10 0.0035 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-03 9/27/2016 23-24 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-03 10/12/2017 23-24 < 0.50 < 1.0 < 0.10 0.0036 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-03 11/2/2022 23-24 < 0.10 0.264 J+ < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 <0.10 ARR-04 3/6/2012 29-30 < 0.50 0.28 JB < 0.10 0.0081 JB < 0.50 < 0.0020 0.030 J < 0.50 ARR-04 10/11/2013 29-30 < 0.50 0.27 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-04 10/8/2014 29-30 < 0.50 0.29 JB < 0.10 0.0030 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-04 9/18/2015 29-30 < 0.50 0.23 J < 0.10 < 0.50 < 0.50 0.00010 JB < 0.10 < 0.50 GEI Consultants, Inc. Sample Results 13-3 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Chemical Name Units Arsenic mg/L Barium mg/L Cadmium mg/L Chromium mg/L Lead mg/L Mercury mg/L Selenium mg/L Silver mg/L TCLP Limit (mg/L) 5 100 1 5 5 0.2 1 5 Location Sample Date Sample Interval (ft) ARR-04 9/27/2016 29-30 < 0.50 < 1.0 0.0021 J < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-04 10/12/2017 31-32 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-04 11/2/2022 29-30 < 0.10 0.299 J+ < 0.10 < 0.10 < 0.10 < 0.010 <0.10 < 0.10 ARR-05 3/6/2012 27-28 < 0.50 0.43 JB < 0.10 0.0086 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-05 10/10/2013 23-24 < 0.50 0.28 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-05 10/8/2014 27-28 < 0.50 0.33 JB 0.0025 J 0.0046 J 0.045 J < 0.0020 < 0.10 < 0.50 ARR-05 9/17/2015 28-30 < 0.50 0.42 J < 0.10 0.0030 JB < 0.50 0.00011 JB < 0.10 < 0.50 ARR-05 9/27/2016 27-28 < 0.50 < 1.0 < 0.10 0.0031 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-05 10/12/2017 29-30 < 0.50 < 1.0 < 0.10 0.0035 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-05 11/1/2022 27-28 < 0.10 0.916 J+ < 0.10 < 0.10 < 0.10 < 0.010 <0.10 <0.10 ARR-06 3/7/2012 23-24 < 0.50 0.30 JB < 0.10 0.0089 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-06 10/10/2013 19-20 < 0.50 0.17 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-06 10/7/2014 23-24 < 0.50 0.38 JB < 0.10 0.0063 J 0.071 J < 0.0020 < 0.10 0.0049 JB ARR-06 9/17/2015 23-24 < 0.50 0.20 J < 0.10 < 0.50 0.072 J 0.0043 < 0.10 < 0.50 ARR-06 9/27/2016 23-24 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-06 10/12/2017 23-24 < 0.50 < 1.0 < 0.10 0.0049 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-06 11/1/2022 23-24 < 0.10 0.304 J+ < 0.10 < 0.10 < 0.10 < 0.010 <0.10 < 0.10 ARR-07 3/6/2012 19-20 < 0.50 0.29 JB < 0.10 0.014 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 10/11/2013 19-20 < 0.50 0.13 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 DUP 10/11/2013 19-20 < 0.50 0.14 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 10/7/2014 19-20 < 0.50 0.071 JB < 0.10 0.0057 J 0.017 J < 0.0020 < 0.10 < 0.50 ARR-07 DUP 10/7/2014 19-20 < 0.50 0.096 JB < 0.10 < 0.50 0.015 J < 0.0020 < 0.10 < 0.50 ARR-07 9/17/2015 19-20 0.023 J 0.43 J < 0.10 < 0.50 0.013 J < 0.0020 < 0.10 < 0.50 ARR-07 DUP 9/17/2015 19-20 0.028 J 0.21 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 9/27/2016 19-20 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 DUP 9/27/2016 19-20 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 10/12/2017 19-20 < 0.50 < 1.0 < 0.10 0.0059 J < 0.50 < 0.0020 < 0.10 < 0.50 GEI Consultants, Inc. Sample Results 13-4 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Chemical Name Units Arsenic mg/L Barium mg/L Cadmium mg/L Chromium mg/L Lead mg/L Mercury mg/L Selenium mg/L Silver mg/L TCLP Limit (mg/L) 5 100 1 5 5 0.2 1 5 Location Sample Date Sample Interval (ft) ARR-07 DUP 10/12/2017 19-20 < 0.50 < 1.0 < 0.10 0.0033 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-07 11/1/2022 19-20 <0.10 <0.10 <0.10 <0.10 <0.10 <0.010 <0.10 <0.10 ARR-07 DUP 11/1/2022 19-20 < 0.10 <0.10 < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 <0.10 ARR-08 3/6/2012 27-28 < 0.50 0.17 JB < 0.10 0.0083 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-08 DUP 3/6/2012 27-28 < 0.50 0.20 JB < 0.10 0.0085 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-08 10/10/2013 27-28 < 0.50 0.13 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-08 10/8/2014 27-28 < 0.50 0.20 JB < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 0.0045 JB ARR-08 9/17/2015 27-28 < 0.50 0.054 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-08 9/27/2016 27-28 < 0.50 < 1.0 0.0023 J 0.0081 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-08 10/12/2017 26-28 < 0.50 < 1.0 < 0.10 0.0051 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-08 11/1/2022 27-29 < 0.10 0.334 J+ < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 < 0.10 ARR-09 3/7/2012 19-20 < 0.50 0.12 JB < 0.10 0.0087 JB < 0.50 < 0.0020 < 0.10 < 0.50 ARR-09 10/10/2013 19-20 < 0.50 0.19 J < 0.10 0.0032 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-09 10/7/2014 19-20 < 0.50 0.38 JB < 0.10 0.0063 J 0.070 J 0.000031 J < 0.10 < 0.50 ARR-09 9/17/2015 19-20 < 0.50 0.16 J < 0.10 < 0.50 0.10 J < 0.0020 < 0.10 < 0.50 ARR-09 9/27/2016 19-20 < 0.50 < 1.0 0.0076 J < 0.50 < 0.50 0.000063 JB* < 0.10 < 0.50 ARR-09 10/12/2017 19-20 < 0.50 < 1.0 < 0.10 0.0033 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-09 11/1/2022 19-20 < 0.10 0.276 J+ < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 < 0.10 ARR-10 3/6/2012 19-20 < 0.50 0.30 JB < 0.10 0.0092 JB < 0.50 < 0.0020 < 0.10 0.0041 J ARR-10 10/10/2013 19-20 < 0.50 0.20 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-10 10/8/2014 19-20 < 0.50 0.23 JB < 0.10 0.012 J 0.032 J < 0.0020 < 0.10 < 0.50 ARR-10 9/17/2015 19-20 < 0.50 0.32 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-10 9/27/2016 19-20 < 0.50 < 1.0 < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 ARR-10 10/12/2017 17-18 < 0.50 < 1.0 < 0.10 0.0031 J < 0.50 < 0.0020 < 0.10 < 0.50 ARR-10 11/1/2022 19-20 <0.10 0.503J+ <0.10 <0.10 <0.10 <0.010 <0.10 <0.10 Equipment Blank 3/7/2012 -- < 0.50 0.021 J < 0.10 0.0062 J < 0.50 < 0.0020 < 0.10 < 0.50 Equipment Blank 10/10/2013 -- < 0.50 0.0039 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 GEI Consultants, Inc. Sample Results 13-5 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Chemical Name Units Arsenic mg/L Barium mg/L Cadmium mg/L Chromium mg/L Lead mg/L Mercury mg/L Selenium mg/L Silver mg/L TCLP Limit (mg/L) 5 100 1 5 5 0.2 1 5 Location Sample Date Sample Interval (ft) Equipment Blank 10/11/2013 -- < 0.50 0.0063 J < 0.10 < 0.50 < 0.50 < 0.0020 < 0.10 < 0.50 Equipment Blank 10/7/2014 -- < 0.50 0.0096 JB < 0.10 0.0031 JB < 0.50 < 0.0020 < 0.10 < 0.50 Equipment Blank 10/8/2014 -- < 0.50 0.0076 JB < 0.10 < 0.050 < 0.50 < 0.0020 < 0.10 < 0.50 Equipment Blank 9/17/2015 -- < 0.50 < 0.0020 < 0.10 < 0.050 < 0.50 < 0.0020 < 0.10 <0.50 Equipment Blank 9/27/2016 -- < 0.50 < 0.0030 < 0.10 < 0.50 0.013 JB < 0.0020 < 0.10 < 0.50 Equipment Blank 10/12/2017 -- < 0.50 < 1.0 < 0.10 < 0.50 0.013 J < 0.0020 < 0.10 < 0.50 Equipment Blank 11/1/2022 -- < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 < 0.10 Equipment Blank 11/2/2022 -- < 0.10 0.107 < 0.10 < 0.10 < 0.10 < 0.010 < 0.10 < 0.10 Notes: < - analyte concentration is less than referenced laboratory reporting Omit J - analyte detected less than the reporting limit but greater than or equal to the method detection Omit and the concentration is an approximate value. B - analyte detected in method blank - LCS or LCVSD is outside acceptance limits mg/L — milligrams per liter TCLP — Toxicity Characteristic Leaching Procedure ft — feet GEI Consultants, Inc. Sample Results 13-6 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 4. Conclusions The 10 -year soil sampling occurred in November 2022 within the Low Permeable Barrier at the City of Aurora North Campus Aquifer Recharge and Recovery Site A. Soil samples were collected in the same locations as previous years and were analyzed for TCLP concentrations of RCRA 8 metals to evaluate data trends and assess the possible accumulation of these metals in the soil. All ten samples were collected at the target depth intervals established in 2012. Analytical results indicate that barium was detected in ten soil samples, however concentrations were consistent with historical observations and significantly below the TCLP screening level published by the EPA. No other metals were detected at TCLP concentrations above the reporting limit in 2022. In general, the concentration of detected metals was similar to the baseline sampling event conducted in 2012 and in the five consecutive years of sampling which began in 2013. A statistical analysis was not performed due to the low levels of metals detected and the laboratory qualifiers indicating that the values are approximate. Given the low levels of metals detected, and the generally similar concentrations this year compared to previous sampling results, GEI concludes that TCLP RCRA 8 metals are not accumulating in soils within the LPB at the Site and recommends sampling in 2027 (five-year sampling interval) as allowed in the USR-1582 permit and subsequent approved sampling plan. The next sampling event is scheduled for 2027. G E I Conclusions 14-1 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 5. References CH2M HILL (2012). "Soil Sampling and Monitoring Summary Report," Prepared for City of Aurora, North Campus Aquifer Recharge and Recovery Site. Fort Lupton, Colorado, May. GEI Consultants, Inc. (2017). "Soil Sampling and Monitoring Work Plan," Prepared for City of Aurora, North Campus Aquifer Recharge and Recovery Site. Fort Lupton, Colorado, September. Weld County Planning Commission, Resolution USR-1582 City of Aurora, Site Specific Development Plan and Special Review Permit for a Major Facility of a Public Utility (Water Resource Project — Aquifer, Recharge and Recovery) In the A (Agricultural) Zone District. References 15-1 NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Appendix A Boring Logs G E I �o�=� a� Boring Logs I Appendix A GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-1 PAGE 1 of 1 LOCATION: See Plan GROUND SURFACE EL. (ft): 4931.31 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 17.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.D/O.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D.IO.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Op = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Toryane Shear Strength Blows per 6 in.: 140 lb hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cores>4 in / Pen., % SC = Sonic Core PI = Plastidty Index WOR = Weight of Rods DP = Direct Push Sample PID = Photcionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger .D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data m . J Soil and Rock Description t7 Depth (ft) Sample Depth pth Pen./ Rec. (in) Blows per 6 in. or RQD 4921- - 4911- - - - S1 0 to 5 60/46 PUSH Sample collected: ARR-I-SO-1516-110122. 0 - 0.8 ft: SILTY SAND (SM); -60% fine to medium sand, -30% nonelastic fines, -10% gravel up to 1/4", brown, dry. Contains roots. / j j0.8 - 5.0 ft: SANDY LEAN CLAY WITH GRAVEL (CL); -60% low plasticity fines, -25% fine to coarse sand, -15% gravel up to 1/4", dark brown, dry. j j 5.0 - 7.2 ft: SANDY LEAN CLAY (CL); -65% low plasticity fines, -35% fine to medium sand, dark brown, dry. 5 S2 - - 5 to 10 60/38 PUSH 7.2 - 17 if WIDELY GRADED SAND (SW); -80% fine to coarse } sand, -20% gravel up to 3/4", light gray to light brown, dry to wet. Wet at -12 ft. 10 S3 - is 14 48/28 PUSH S4 15 io 17 36/36 PUSH 20 Bottom of boring at 17 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Aquil /�� Recharge and Recovery Site A ►``�v�)/► CITY/STATE: Fort Lupton, Colorado G El GEI PROJECT NUMBER: 2203242 Consultants GEI WOSURN STD 2-LOCATION.RAPHIC LOG AURORA BORING INFORMATION BORING A RR -2 PAGE 1 of 2 LOCATION: See Plan GROUND SURFACE EL. (ft): 4926.18 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 25.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.DRID.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.DJO.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in.: 14o Ib hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2 -inch -0.D. = Length of Sound Cores. in / Pen.,% SC = Sonic Core PI = Plasticity Index W0R = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. W0H = Weight of Hammer HSA = Hollow -Stem Auger .D./0.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data �, a u O. Soil and Rock Description 2 O Depth (ft) Sample D(eftp)th Pen./ Rec. (in) Blows per 6 in. Or RQD 4916- - - 4906- — - - - - 5 Si to 60/26 PUSH 0 - 1.0 ft: SILTY SAND (SM); -60% mostly fine to medium sand, ; :: ; -30% nonplastic fines, -10% gravel up to 1/4", brown, dry. j 1.0 - 5.8 ft: SANDY LEAN CLAY (CL); -65% low plasticity fines, -25% mostly fine sand, 10% gravel up to 1/4", brown, dry. Stiff/dense. %fir S2 - T 10 to 10 60/24 PUSH 58-16.3 ft: 1MDELY GRADED SAND (S/Y , -85% fine to i coarse sand, -10% gravel up to 1/4", -5% nonplastic fines, brown, moist. S3 15 to 15 60/23 PUSH S4 to 20 60/20 PUSH 16.3 - 20 ft: SILTY SAND (SM); -80% mostly fine sand, -15% nonplastic fines, -5% gravel up to 1/4", brown, wet. 20 S5 20 to 25 60/49 PUSH : 20 - 23.3 ft: WIDELY GRADED SAND (SW); -85% fine to coarse sand, -15% gravel up to 1/2", brown, wet. NOTES: PROJECT NAME: Aurora Water North Campus Aqui1 Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado LLI GEI PROJECT NUMBER: 2203242 GEI Consultants LOCATION: See Plan GROUND SURFACE EL. (ft): 4926.18 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC BORING ARR-2 PAGE 2of2 Elev. Depth (ft) (ft) Sample Information Sample No. Depth (9) Pen./ Rec. (in) Blows per 6 in. or RQD Drilling Remarks/ Field Test Data Soil and Rock Description - 25 4896- 30 - 35 4886- 40 - 45 4876- 50 Sample collected: ARR-SO- 2e4d-110122_ 23.3 - 25 ft: NARROWLY GRADED SAND (SP); -95% mostly fine to medium sand, -5, nonelastic fines, brown, wet. Bottom of boring at 25 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Agui1 Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado G E GEI PROJECT NUMBER: 2203242 Consultants GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-3 PAGE 1 of 2 LOCATION: See Plan GROUND EL. (ft): 4921.12 DATE START/END: 2/2022 - 11/2/2022 VERTICAL DATUM: DRILLING DRILL NG COMPANY,11Site Services Drilling, LLC TOTAL DEPTH (ft): 25.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.D/O.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D.IO.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec.= Recovery Length C = Core Sample Sy = Pocket Torvane Shear Strength Blows per 6 in.: 1401b hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cores. in / Pen., % SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger I.D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data _Er Soil and Rock Description Depth (ft) Sample D(eftp)th Pen./ Re . (in) Blows per 6 in. or RQD 4911— - - 4901- S1 - - - - to 0 5 60/12 PUSH 0 - 0.7 ft: SANDY LEAN CLAY (CL); -60% low plasticity fines, r -30% fine to coarse sand, 10% gravel up to 1/4", brown to light gray, dry. Contains roots. 0.7 - 5.0 ft LEAN CLAY (CL): -80% low plasticity fines, -15% fine to coarse sand, -5% gravel up to 1/4", dark brown, dry. Stiff. 5.0 - 5.7 ft: LEAN CLAY (CL); —60% low plasticity fines, —30./0 fine to coarse sand, 10% gravel up to 1/4", brown to light gray, dry. 5 S2 - 5 to 10:iiiiii 60/34 PUSH 5.7 - 7.0 ft: WIDELY GRADED SAND (SW); -100% fine to coarse sand, brown, moist. 7.0 - 7.6 ft: LEAN CLAY WITH SAND (CL); —85% low plasticity fines, —15% fine sand, gray, dry. 7.6 - 10 ft: WIDELY GRADED SAND (SW); —100% fine to coarse sand, brown, wet. WI(SVV); 10 - 15 ft: WIDELY GRADED SAND W); -85% fine to coarse sand, 10% gravel up to 1/4", -5%nonplastic fines, brown, wet. 10 S3 10 to 15 60/20 PUSH 15 - 22.1 ft: NUDELY GRADED SAND WITH SILT AND GRAVEL (SW- SM); -75% fine to coarse sand, -15% gravel up to 1/2", -15% nonplastic fines, brown, wet. 15 15 to 20 60/38 PUSH 20 S5 ' to 25 60/36 PUSH NOTES: Recharge and Recovery Site A PROJECT NAME: Aurora Water North Campus Aquil E.) CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 GEI Consultants LOCATION: See Plan GROUND SURFACE EL. (ft): 4921.12 DATE START/END: 11/2/2022 - 11/2/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC BORING ARR-3 PAGE 2of2 Elev. Depth (ft) (ft) Sample Information Sample No. Depth (ft) Pen./ Rec. (in) Blows per 6 in. or RQD Drilling Remarks/ Field Test Data L m Soil and Rock Description - 25 4891- 30 - 35 4881- 40 - 45 4871- 50 A _ Sample collected: ARR-3-SO-2324-110222. 22.1 - 22.7 ft: SANDY LEAN CLAY (CL); -70% low plasticity fines, -30% fine to medium sand, gray, moist. 22.7 - 25 ft: SILTY SAND (SM); -85% fine to coarse sand, -15% nonelastic fines, gray to brown, wet. Bottom of boring at 25 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Aquil Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 Consultants GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-4 PAGE 1 of 2 LOCATION: See Plan GROUND SURFACE EL. (ft): 4923.47 DATE START/END: 11/2/2022 - 11/2/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 30.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER ID/O.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D./O.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec.= Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in.: 140 lb hammer falling ROD = Rack Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cores>4 in / Pen., % SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger I.D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data o, O J u_ Soil and Rock Description o Depth (ft) Saeople DepN. th pth Pen./ Res. (in) Blows per 6 in. or RQD 4913— - - - --- - - 4903- - — — — S1 0 to 5 60/24 PUSH • 0 - 0.8 t: SILTY SAND (SM); —70% fine to coarse sand, —20% � nonplastic fines, —0%gravel up to 1/4", brown, dry. Contains roots. 0.8 - 1.5 ft: SANDY AN CLAY (CL); —70% low plasticity fines, I —30%fine sand, dark LEbrown, dry. Dense. ;: 1.5 - 5.0 ft: WIDELY GRADED SAND (SW); -75% fine to coarse sand, -20% gravel up to 1/4", -5% nonplastic fines, light gray to white, dry. 5.0 - 10 ft: WIDELY GRADED SAND (SW); —90% fine to coarse { sand, —10% gravel up to 1/2", light brown, dry. Coarsens downward. 5 S2 — 5 t0 10 60/16 PUSH j 10 - 17.1 ft: LEAN CLAY WITH SAND (CL); -80% low plasticity fines, -20% mostly fine to medium sand, blue - gray, dry. Stiff. j j 10• S3 15 10 to 15 60/52 PUSH S4 io 20 60/36 PUSH 17.1 - 20 ft: WIDELY GRADED SAND WITH GRAVEL (SW); -75% fine to coarse sand, -20% gravel up to 1/2", -5% nonplastic fines, brown, wet. .iij •� 20 - 21.2 ft: WIDELY GRADED GRAVEL WITH SAND (GW); • -60% gravel up to 1/2", -40% fine to coarse sand, brown to red, r wet. 20 S5 20 25 60/36 PUSH NOTES: PROJECT NAME: Aurora Water North Campus Aquit Recharge and Recovery Site Arct CITYISTATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 Consultants LOCATION: See Plan GROUND SURFACE EL. (ft): 4923.47 DATE START/END: 11/2/2022 - 11/2/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC BORING ARR-4 PAGE 2 of 2 Sample Information Elev. Depth Pen./ Blows (ft) (ft) Sample Depth Rec. per 6 in. No. (ft) (in) or RQD Drilling Remarks/ Field Test Data Soil and Rock Description - 25 4893- 30 - 35 4883- 40 Na N ai 0 J CL' O Q] - 45 c7 J U_ a c 0 U O N 4873- 50 ten NOTES: S6 60/51 PUSH Sample collected: ARR-4-SO-2930-110222. 21.2 - 26.7 ft: SILTY SAND (SM); -70% mostly fine to medium sand, -30% nonelastic fines, light gray to brown, wet. Contains clayey, low plasticity fines. 26.7 - 27 ft: LEAN CLAY (CL); —90% low plasticity fines, —10% fine sand, brown, moist. Soft. 27 - 2.6 ft: NARROWLY GRADED SAND WITH CLAY (SP - SC); -80% mostly fine to medium sand, -20% low plasticity fines, brown to gray, wet. 28.6 - 30 fL LEAN CLAY (CL); -90% low plasticity fines, —10% fine sand, brown, moist. Soft. Bottom of boring at 30 feet. Backfilled with bentonite chips. PROJECT NAME: Aurora Water North Campus Aqui1 Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 I Consul tan is GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA_BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-5 PAGE 1 of 2 LOCATION: See Plan GROUND SURFACE EL. (ft): 4939.35 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 30.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.D/O.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.DJO.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in: 140 ib hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cores. in / Pen.,% SC = Sonic Core PI = Plastid, Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger I.D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data o, O J s o. Soil and Rock Description O Depth ple (ft) semi:. D(eftp)th Pen./ Rec. (in) Blows per 6 in. or RQD S1 A 5 60/16 PUSH No recovery from 20 - 30 feet. Advanced 3" augers to 30 feet. Collected sample from auger cuttings. 0 - 0.3 ft: SILTY SAND (SM); -80% fine to medium sand, —20% nonplastic fines, brown, dry. Contains roots. j 0.3 - 11.4 ft: LEAN CLAY (CL); -90% low plasticity fines, —10./0 5jS2 I to 10 60/40 PUSH 10 S3 - - 15 is 60/20 PUSH ` 11.4 - 15 ft: SILTY SAND (SM); -70% mostly fine to medium sand, —30% nonplastic to low plasticity fines, orange - brown, moist. 15 - 30 ft: SILTY SAND WITH GRAVEL (SM); —65% mostly fine s to medium sand, —20% nonplastic to low plasticity fines, —15% gravel up to 1/4", brown, wet. sa 4919- 20 15 to 20 60/20 PUSH SS 20 to 25 60/0 PUSH NOTES: PROJECT NAME: Aurora Water North Campus Aquil 1 Recharge and Recovery Site A 4 CITYISTATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 GEI Consultants LOCATION: See Plan GROUND SURFACE EL. (ft): 4939.35 DATE STARTIEND: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC BORING ARR-5 PAGE 2of2 Elev. Depth (ft) (5) Sample Information Sample No. Depth (ft) Pen./ Rec. (in) Blows per 6 in. or RQD Drilling Remarks/ Field Test Data Soil and Rock Description - 25 4909- 30 - 35 4899- 40 - 45 4889- 50 $6 25 to 60/0 PUSH Sample collected: IV5-S0-2728-110122 Bottom of boring at 30 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Aqui1 /�, Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 GEIN Consuitanu GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-6 PAGE 1 of 2 LOCATION: See Plan GROUND SURFACE EL. (ft): 4934.91 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 25.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.D/O.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D./O.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in.: 140 lb hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 21nch-O. D. = Length of Sound Cores. in / Pen., % SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger I.D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data o, O J Soil and Rock Description p it_ c3 Depth (ft) SNo.ple D(eft)th Pen./ Rec. (in) Blows per 6 in. or RQD 4925- - - - - 4915- - - S1 to 5 60/14 PUSH 0 - 5.0 ft: SANDY SILT (ML); -70% nonplastic fines, -30% fine sand, light gray, dry. Dense. 5 S2 - 10 to 10 60/30 PUSH / 5.0 - 12.1 ft: LEAN CLAY (CL); -95% low plasticity fines, -5% fine sand, dark brown, dry to moist. Stiff. S3 15 to 15 60/38 PUSH 12.1 - 15 ft: WIDELY GRADED SAND (SW); -90% fine to coarse sand, -10% gravel up to 1/4", brown, dry. ii.: 15 - 25 ft: WIDELY GRADED SAND WITH SILT AND GRAVEL (SW - SM); -60% fine to coarse sand, -30% gravel up to 1/2", -10% nonplastic fines, brown, moist to wet. Wet at -16 ft. • 54 io 20 60/18 PUSH 20 S5 to 25 60/28 PUSH NOTES: /// Recharge and Recovery Site A PROJECT NAME: Aurora Water North Campus Aquil G E I v CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 Consultants LOCATION: See Plan GROUND SURFACE EL. (ft): 4934.91 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC BORING ARR-6 PAGE 2of2 Sample Information Elev. Depth Pen./ Blows (ft) (ft) Sample Depth Rec. per 6 in. No. (ft) (in) or RQD Drilling Remarks/ Field Test Data Soil and Rock Description - 25 4905- 30 - 35 4895- 40 - 45 4885- 50 taSample collected: ,n, SO -224-110122. Bottom of boring at 25 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Aqui1 Recharge and Recovery Site A C./STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 E I Consultants GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-7 PAGE 1 of 1 LOCATION: See Plan GROUND SURFACE EL. (ft): 4931.82 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 20.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.DIO.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.DJO.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in.: 1401b hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2 -inch -O. D. = Length of Sound Cores>4 in / Pen.,°A, SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger I.D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data rn O J Soil and Rock Description 13 Depth (ft) Sample No. Depth (ft) Pen./ Rec. (in) Blows per 6 in. or RQD 4922- - - 4912- - - - S1 0 to 60/48 PUSH Samples collected: ARR-7-SO-1920-110122 and FD -SO -110122 (field duplicate). 0 - 1.3 ft: SILTY SAND (SM); -70% mostly fine to medium sand, —30% nonplastic fines, brown, dry. Contains roots. 1.3 - 2.511 SILT WITH SAND (ML); -80% nonplastic fines, -20% fine sand, dark brown, dry. Dense. 2.5 - 5.0 ft: SILTY SAND (SM); -80% fine sand, —20% nonplastic fines, light brown, dry. Dense. 5.0 - 5.5 ft: NARROWLY GRADED SAND (SP); -100% mostly fine to medium sand, light brown, dry. i 5 S2 - - 5 to 10 60/36 PUSH 5.5 - 6.2 ft: SILTY SAND (SM); -60% mostly fine sand, -40% r :_: ,, nonplastic fines, brown, dry. I .•::,:: :-; v 6.2 - 10 ft: WIDELY GRADED SAND WITH SILT AND GRAVEL : f (SW - SM); -75% fine to coarse sand, -15% gravel up to 1/4", }: ; f -10% nonplastic fines, light brown to dark brown, dry. f W J 10 - 11.5 ft: SILTY SAND (SM); -60% fine to coarse sand, —30% nonplastic fines, 10% gravel up to 1/4", brown, moist. 10 S3 113 to 15 60/24 PUSH : 11.5 - 20 ft: WIDELY GRADED SAND (SW); -90% fine to coarse sand, —10% gravel up to 1/2", brown, wet. • ' 15 S4 to 20 60/24 PUSH Bottom of boring at 20 feet. Backfilled with bentonite chips. 20 NOTES: PROJECT NAME: Aurora Water North Campus Aquil LIRecharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 Consultants BORING INFORMATION BORING ARR-8 PAGE 1 0 2 LOCATION: See Plan GROUND SURFACE EL. (ft): 4928.37 DATE START/END: 11/2/2022 - 11/2/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 30.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.DIO.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D./O.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sy = Pocket Torvane Shear Strength Blows per 6 in.: 140 lb hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cares>4 in / Pen., % SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger .D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data rn O J t Soil and Rock Description i 6 Depth (ft) SNomple Depth Pen./ Rec. (in) Blows per 6 in. or RQD 4918— — 4908— - - S1 0 to 5 60/18 PUSH 0 - 5.0 ft: SILTY SAND WITH GRAVEL (SM); -60% fine to coarse sand, -25% gravel up to 1/2", -15% nonplastic fines, brown, dry. 5.0 - 7.8 ft: LEAN CLAY VVITH SAND (CL); --80% low plasticity j fines, -20% fine sand, brown to gray, dry. Stiff, dense. A 5 S2 - 5 to 10 60/40 PUSH } 7.8 - 10 ft: WIDELY GRADED SAND WITH GRAVEL (SW); —70% fine to coarse sand, 30% gravel up to 1/4", brown, moist. - 10 - 15 ft: WIDELY GRADED SAND WITH GRAVEL (SW); —80% fine to coarse sand, —20% gravel up to 1/4", brown, moist to wet. Wet at —12 ft. 10 S3 — — 15 10 to 15 60/40 PUSH j 15 - 17.8 ft: LEAN CLAY (CL); -100% low plasticity fines, brown, dry. Stiff, dense. A sa 15 to 20 60/44 PUSH •v v v 17.8 - 20 ft: WIDELY GRADED SAND WITH SILT(SW - SM); ,.; v —80% fine to coarse sand, -10% gravel up to 1/4", —10% - }f nonplastic fines, brown, wet. ;ti P: 20 - 30 ft: WIDELY GRADED SAND (SW); -90% fine to coarse sand, -10% gravel up to 1/4", brown, wet. 20 S5 io 25 60/42 PUSH NOTES: PROJECT NAME: Aurora Water North Campus Aqui1 Recharge and Recovery Site A ie -.41 Lc CITY/STATE: Fort Lupton, Colorado GEI GEI PROJECT NUMBER: 2203242 Consultants LOCATION: See Plan GROUND SURFACE EL. (ft): 4928.37 DATE START/END: 11/2/2022 - 11/2/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC BORING ARR-8 PAGE 2 of 2 Sample Information Elev. Depth (ft) (ft) Sample Depth Re;/ per r fi . (ft) (in) or RQD Drilling Remarks/ Field Test Data rn Soil and Rock Description - 25 4898- 30 - 35 4888- 40 - 45 4878- 50 A10 60/60 AUGER No recovery from 20 - 25 feet. Advanced augers to 30 feet. Collected sample from auger cuttings. Sample collected: ARR-8-2729-110222. Bottom of boring at 30 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Aqui1 Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado GEI PROJECT NUMBER: 2203242 E I Consultants GEI WOBURN STD 2 -LOCATION -GRAPHIC LOG AURORA BORING LOGS.GPJ 12/2/22 BORING INFORMATION BORING ARR-9 PAGE 1 of 1 LOCATION: See Plan GROUND SURFACE EL. (ft): 4931.07 DATE START/END: 11/1/2022 - 11/1/2022 VERTICAL DATUM: DRILLING COMPANY: Site Services Drilling, LLC TOTAL DEPTH (ft): 20.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.D/O.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D./O.D.: NA / NA DRILLING METHOR Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in.: 140 lb hammer falling RQD = Rack Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cores>4 in / Pen., % SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hallow -Stem Auger I.D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data m O J s o Soil and Rock Description 3 Depth (ft) Sample N Depth Pen./ Rec. (in) Blows per 6 in. or RQD 4921- - I - 4911- - - 5 S1 0 to 5 60/20 PUSH Sample collected: ARR-9-SO-1920-110122. 0 - 5.0 ft: SILTY SAND WITH GRAVEL (SM); -70% fine to coarse sand, -15% gravel up to 1/4", -15% nonplastic fines, brown, dry. Contains roots. Dense. S2 - to 10 60/34 PUSH 5.0 - 15 ft: WIDELY GRADED SAND WITH SILT (SW - SM); -80% fine to coarse sand, -10% gravel up to 1/4", —10% nonplastic fines, light brown to brown, dry. Moist at —10 ft. • • 10 S3 - 15 io 15 60/12 PUSH S4 15 to 20 60/24 PUSH } 15 - 20 ft: WIDELY GRADED SAND WITH GRAVEL S (SIN); -80% fine to coarse sand, —20% gravel up to 1/2", brown, wet. 20 Bottom of boring at 20 feet. Backfilled with bentonite chips. NOTES: PROJECT NAME: Aurora Water North Campus Aquil Recharge and Recovery Site A CITY/STATE: Fort Lupton, Colorado LI GEI PROJECT NUMBER: 2203242 G E I <onsuitants BORING INFORMATION BORING ARR-10 PAGE 1 of 1 LOCATION: See Plan GROUND EL. (ft): 4933.69 DATE STARTIEND: /Drilling, DRILL NG COMPANYt1/Site Services LLC VERTICAL DATUM: DRILLING TOTAL DEPTH (ft): 20.0 DRILLER NAME: Brad Dodson LOGGED BY: Jesse Neff RIG TYPE: Geoprobe 7822DT DRILLING INFORMATION HAMMER TYPE: N/A CASING I.D./O.D.: NA/ NA CORE BARREL TYPE: Macrocore AUGER I.DIO.D.: NA / NA DRILL ROD O.D.: NM CORE BARREL I.D.IO.D.: NA / NA DRILLING METHOD: Direct Push WATER LEVEL DEPTHS (ft): Not measured ABBREVIATIONS: Pen. = Penetration Length S = Split Spoon Sample Qp = Pocket Penetrometer Strength NA, NM = Not Applicable, Not Measured Rec. = Recovery Length C = Core Sample Sv = Pocket Torvane Shear Strength Blows per 6 in.: 1401b hammer falling RQD = Rock Quality Designation U = Undisturbed Sample LL = Liquid Limit 30 inches to drive a 2-inch-O.D. = Length of Sound Cores>4 in / Pen.,% SC = Sonic Core PI = Plasticity Index WOR = Weight of Rods DP = Direct Push Sample PID = Photoionization Detector split spoon sampler. WOH = Weight of Hammer HSA = Hollow -Stem Auger .D./O.D. = Inside Diameter/Outside Diameter Elev. (ft) Sample Information Drilling Remarks/ Field Test Data m a J Soil and Rock Description m 0 Depth (ft) SNomple D(eftp)th Pen./ Rec. (in) Blows per 6 in. or RQD 4924- - — — 4914- — — S1 0 to 5 60/23 PUSH Low recovery. Advanced 3" augers to 20 feet. Collected sample from auger cuttings. Sample collected: ARR-10-SO-1920-110122. 0 - 6.3 ft: SILT (ML); —80% nonplastic fines, —20% mostly fine to medium sand, brown, to light gray, dry. Contains roots, trace gravel. 5 S2 - - to 10 60/35 PUSH !:•:::: 6.3 - 6.8 ft: WIDELY GRADED SAND (SW); -95% fine to coarse % sand, -5% nonplastic fines, brown, dry. i 6.8 - , dark 1 Lft: LEAN CLAY (CL); -95% low plasticity fines, -5% fine sandbrown, oist. A i 10 - 10.8 ft: WIDELY GRADED SAND WITH GRAVEL S (IM; -60% fine to coarse sand, -40% gravel up to 1/4", light gray, dry. 10.8 - 15.8 ft: WIDELY GRADED SAND (SW); —90% fine to :: coarse sand, —10% gravel up to 1/2", dry to wet. Wet at' -12 ft. : •S:::: 10 S3 it° 15 60/24 PUSH 15 S4 15 to 20 60/14 PUSH •` 15.8 - 20 ft: SILTY SAND WITH GRAVEL (SM); —70% fine to coarse sand, -15% gravel up to 1/4", —15% nonplastic fines, brown with red, wet. i• Bottom of boring at 20 feet. Backfilled with bentonite chips. 20 NOTES: PROJECT NAME: Aurora Water North Campus Aqui1 /// Recharge and Recovery Site A L. CITYISTATE: Fort Lupton, Colorado v GEI PROJECT NUMBER: 2203242 E I Consultants NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Laboratory Analytical Report Laboratory Analytical Report I Appendix B :C,aww-;!w' 1. 4! tt' -t W=it's `_3 aceAnalytical R ANAL v CA R November 10, 2022 GEI Consultants - CO Sample Delivery Group: Samples Received: Project Number: Description: Site: Report To: PORT L1553536 11/03/2022 2203242 North Campus Sampling 2022 ARR SOIL SAMPLING Tom Daigle 4601 DTC Boulevard Suite 900 Denver, CO 80237 Entire Report Reviewed By: Chris Ward Project Manager %fa./ Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and 4. ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, , and as the samples are received. 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com Cp Cn 13 Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 1 of27 ■sc3# f : : 7Tit{'If ; TSl"-'EsT' ₹.1 -'Is rest TABLE OF CONTENTS Cp: Cover Page Tc: Table of Contents Ss: Sample Summary Cn: Case Narrative Sr: Sample Results ARR-1-SO-1516-110122 L1553536-01 AR R -2 -SO -2324-11012 2 ARR-3-SO-2324-110122 AR R -4 -SO -2930-110122 ARR-5-SO-272 8-11012 2 ARR-6-SO-2324-110122 ARR-7-S O-19 2 0-11012 2 ARR-8-SO-2729-110122 ARR-9-SO-192 0-11012 2 L1553536-02 L1553536-03 L1553536-04 L1553536-05 L1553536-06 L1553536-07 L1553536-08 L1553536-09 ARR-10-SO-1920-110122 L1553536-10 FD -SO -110122 L1553536-11 EB-110122 L1553536-12 EB-110222 L1553536-13 Qc: Quality Control Summary Mercury by Method 7470A Metals (ICP) by Method 6010B GI: Glossary of Terms Al: Accreditations & Locations Sc: Sample Chain of Custody 1 2 3 6 7 7 8 9 10 11 12 13 14 15 16 17 18 19 20 20 21 23 24 25 Qc Cp ACCOUNT: GEI Consultarts - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 2of27 SAMPLE SUMMARY ARR-1-SO-1516-110122 L1553536-01 Waste Collected by Jesse Neff Collected date/time Received date/time 11/01/22 14:25 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-2-SO-2324-110122 L1553536-02 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:31 11/09/22 18:02 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received dateltime 11/01/22 15:21 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-3-SO-2324-110122 L1553536-03 Waste Batch WG1954247 WG1955067 W61955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:33 11/09/22 18:06 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/02/22 09:40 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-4-SO-2930-110122 L1553536-04 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:35 11/09/22 18:09 Analyst Location JWS SRT ZSA Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/02/22 10:45 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-5-SO-2728-110122 L1553536-05 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/2212:38 11/07/22 10:37 11/09/22 18:12 Analyst Location JWS SRT ZSA Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11101/22 11:48 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-6-SO-2324-110122 L1553536-06 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:39 11/09/22 18:15 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/01/22 13:33 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Analysis date/time 11/04/22 12:38 11/07/22 10:41 11/09/22 18:18 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Cp Ss [Cn Sr 6 QC GI 2AI 19 SC ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 3of27 SAMPLE SUMMARY ARR-7-SO-1920-110122 L1553536-07 Waste Collected by Jesse Neff Collected date/time Received date/time 11/01/22 16:05 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-8-SO-2729-110122 L1553536-08 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:45 11/09/22 18:21 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected dateitime Received date/time 11/02/22 12:40 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-9-SO-1920-110122 L1553536-09 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/2212:38 11/07/22 10:09 11/09/22 17:24 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/01/22 12:46 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B ARR-10-SO-1920-110122 L1553536-10 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:47 11/09/22 18:30 Analyst Location JWS SRT ZSA Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/01/22 10:16 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B FD -SO -110122 L1553536-11 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 11/04/22 12:38 11/06/22 07:46 11/06/22 22:26 1 1 1 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:50 11/09/22 18:33 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/01/22 12:00 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B EB-110122 L1553536-12 Waste Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Collected by Jesse Neff Analysis date/time 11/04/22 12:38 11/07/22 10:56 11/09/22 18:36 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Collected date/time Received date/time 11/01/22 16:15 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Analysis date/time 11/04/22 12:38 11/07/22 10:15 11/09/22 17:36 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Cp Ss Sr 1 0 QC ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 4of27 SAMPLE SUMMARY i EB-110222 L1553536-13 Waste Collected by Jesse Neff Collected date/time Received date/time 11/01/22 13:00 11/03/22 09:00 Method Preparation by Method 1311 Mercury by Method 7470A Metals (ICP) by Method 6010B Batch WG1954247 WG1955067 WG1955215 Dilution Preparation date/time 1 11/04/22 12:38 1 11/06/22 07:46 1 11/06/22 22:26 Analysis date/time 11/04/22 12:38 11/07/22 10:58 11/09/22 18:39 Analyst JWS SRT ZSA Location Mt. Juliet, TN Mt. Juliet, TN Mt. Juliet, TN Cp 14 Cn Oc ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 5of2'7 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowincly withheld that would affect the quality of the data. Chris Ward Project Manager L�J 4 Cn Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 6of27 A R R -1-S 0-1516-11012 2 Collected date/time: 11/01/22 14:25 'r;; SAMPLE RESULTS - 01 L1553536 Preparation by Method 1311 Analyte TCLP Extr action Fluid Initial pH Final pH Result 1 7.37 4.84 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution Analysis date / time 11/07/2022 10:31 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.215 ND ND ND ND ND Qualifier RDL mg/I 0.100 5 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 100 1 5 5 5 Dilution Analysis date / time 11/09/202218:02 11/09/2022 18:02 11/09/2022 18:02 11/0912022 18:02 11/09/2022 18:02 11/09/2022 18:02 11/09/2022 18:02 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 • LDS r&i ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 7of27 ARR-2-SO-2324-11012 2 Collected date/time: '1/01/22 15:21 SAMPLE RESULTS - 02 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.20 4.83 Mercury by Method 7470A Qualifier Prep date /time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date / time 11/07/2022 10:33 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.138 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:06 11/09/2022 18:06 11/09/2022 18:06 11/09/2022 18:06 11/09/2022 18:06 11/09/2022 18:06 11/09/202218:06 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 FP] Qc ACCOUNT: GEI Corsultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 8of27 A R R -3-S O- 2 3 2 4-11012 2 Collected date/time: 11/02/22 09:40 •1 SAMPLE RESULTS - 03 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.30 4.85 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12.38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution Analysis date / time 11/07/2022 10:35 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.264 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:09 11/09/2022 18:09 11/09/202218:09 11/09/2022 18:09 11/09/2022 18:09 11/09/2022 18:09 11/09/2022 18:09 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 W31955215 WG1955215 l'Cp 5 Sr Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 9ci 27 A R R -4-S 0-2 9 3 0-11012 2 Collected date/time: 11/02/22 10:45 SAMPLE RESULTS - 04 L1552536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 710 4.83 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/1 0.20 Dilution 1 Analysis date / time 11/07/2022 10:37 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.299 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit 11'I mg�I J 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:12 11/09/2022 18:12 11/09/2022 18:12 11/09/2022 18:12 11/09/2022 18:12 11/09/2022 18:12 11/09/2022 18:12 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 Cp 5 Sr Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/2213:21 PAGE: 10of27 ARR-5-SO-2728-110122 Collected date/time: 11/01/22 11:48 SAMPLE RESULTS - 05 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 9.18 4.87 Mercury by Method 7470A Qualifier Prep date /time 11/4/2022 12:38:57 PM 11/4/202212:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date / time 11/07/2022 10:39 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.916 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:15 11/09/2022 18:15 11/09/2022 18:15 11/09/2022 18:15 11/09/2022 18:15 11/09/2022 18:15 11/09/2022 18:15 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 I' --p 5 Sr ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 11of27 ARR-6-SO-2324-110122 Collected date/time: 11/01/22 13:33 SAMPLE RESULTS - 06 L1553536 Preparation by Method 1311 Cp Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.49 4.83 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Eatch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution Analysis date / time 11/07/2022 10:41 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.304 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 Dilution Analysis date / time 11/09/2022 18:18 11/09/2022 18:18 11/09/2022 18:18 11/09/2022 18:18 11/09/2022 18:18 11/09/2022 18:18 11/09/2022 18:18 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 3 Sc 5 Sr i_ Qc Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIM E: 11/10/22 13:21 PAGE: 12of27 A R R -7-S 0-19 2 0-110122 Collected date/time: 11/01/22 16:05 SAMPLE RESULTS - 07 L1553536 S. a Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.07 4.82 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals ((CP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0)0 Dilution Analysis date / time 11/07/2022 10:45 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND ND ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/202218:21 11/09/2022 18:21 11/09/2022 18:21 11/09/2022 18:21 11/09/202218:21 11/09/2022 18:21 11/09/2022 18:21 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 Cp r - J Th 5 Sr AI ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 13 of 27 ARR-8-SO-2729-110122 SA Collected dateitime: 11/02/22 12:43 MPLE RESULTS - 08 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.76 4.82 Mercury by Method 7470A Qualifier Prep date/time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/20221238:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date/time 11/07/2022 10:09 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.334 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution .4 Analysis date / time 11/09/2022 17:24 11/09/2022 17:24 11/0912022 17:24 11/09/2022 17:24 11/09/202217:24 11/09/2022 17:24 11/09/2022 17:24 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 b QC ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 14 of 27 A R R -9-S 0-19 2 0-11012 2 Collected date/time: 11/01/22 12:46 SAMPLE RESULTS - 09 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.54 4.85 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date / time 11/07/202210:47 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.276 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit 'g/i 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:30 11/09/2022 18:30 11/09/2022 18:30 11/09/2022 18:30 11/09/2022 18:30 11/09/2022 18:30 11/09/2022 18:30 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 rd Tr Cn 5 Sr ACCOUNT: GEI Consultants -CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/2213-21 PAGE: 15 of 27 A R R -10-S 0-19 2 0-11012 2 Collected date/time: 11/01/22 10:16 SAMPLE RESULTS - 10 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 8.65 4.84 Mercury by Method 747OA Qualifier Prep date/time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date / time 11/07/2022 10:50 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.503 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:33 11/09/2022 18:33 11/09/202218:33 11/09/2022 18:33 11/09/2022 18:33 11/09/2022 18:33 11/09/2022 18:33 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 a Cn s Qc • Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 16 of 27 FD -SO -110122 Collected date/time: 11/01/22 12:00 SAMPLE RESULTS - 11 11553536 I Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 7.73 4.83 Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date / time 11/07/2022 10:56 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.104 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution 1 1 1 1 1 1 1 Analysis date / time 11/09/2022 18:36 11/09/2022 18:36 11/09/2022 18:36 11/09/2022 18:36 11/09/202218:36 11/09/2022 18:36 11/09/202218:36 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 W01955215 WG1955215 LTi 5 Sr Qc IGI ACCOUNT: GE! Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 17 of 27 EB-110122 Collected date/time: 11/01/22 16:15 SAMPLE RESULTS - 12 L1553536 Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 N/A N/A Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 6010B Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution 1 Analysis date / time 11/07/2022 10:15 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND ND ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 100 1 5 5 1 r Dilution Analysis date / time 11/09/2022 17:36 11/09/2022 17:36 11/09/2022 17:36 11/09/2022 17:36 11/09/2022 17:36 11/09/2022 17:36 11/09/2022 17:36 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 C p 1 Ss Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 18of27 EB-110222 Collected date/time: 11/01/22 13:00 SAMPLE RESULTS - 13 L1553536 i Preparation by Method 1311 Analyte TCLP Extraction Fluid Initial pH Final pH Result 1 N/A N/A Mercury by Method 7470A Qualifier Prep date / time 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM 11/4/2022 12:38:57 PM Batch WG1954247 WG1954247 WG1954247 WG1954247 Analyte Mercury Result mg/I ND Metals (ICP) by Method 60108 Qualifier RDL mg/I 0.0100 Limit mg/I 0.20 Dilution Analysis date / time 11/07/2022 10:58 Batch WG1955067 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Result mg/I ND 0.107 ND ND ND ND ND Qualifier RDL mg/I 0.100 0.100 0.100 0.100 0.100 0.100 0.100 Limit mg/I 5 100 1 5 5 1 5 Dilution Analysis date / time 11/09/2022 18:39 11/09/2022 18:39 11/09/2022 18:39 11/09/2022 18:39 11/09/2022 18:39 11/09/2022 18:39 11/09/2022 18:39 Batch WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 WG1955215 Cp Al ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 19 of 27 WG1955067 QUALITY CONTROL SUMMARY Mercury by Method 7470A L1553536-01,02,03,04,05,06,07,08,09,10,11,12,13 Method Blank (MB) (MB) R3857758-1 11/07/22 10:01 MB Result Analyte mg/I Mercury U MB Qualifier MB MDL MB RDL mg/I mg/I 0.00333 0.0100 Laboratory Control Sample (LCS) (LCS) R3857758-2 11/07/22 10:07 Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/I mg/I 96 Mercury 0.0300 0.0323 108 80.0-120 L1553536-08 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1553536-08 11/07/22 10:09 • (MS) R3857758-3 11/07/22 10:11 • (MSD) R3857758-4 11/07/22 10:13 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/I mg/I mg/I mg/I % % % % Mercury 0.0300 ND 0.0321 0.0311 107 104 1 75.0-125 3.16 20 L1553536-'12 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1553536-12 11/07/22 10:15 • (MS) R3857758-5 11/07/22 10:17 • (MSD) R3857758-6 11/07/22 10:19 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/I mg/I mg/I mg/I % % % % % Mercury 0.0300 ND 0.0316 0.0298 105 99.4 1 75.0-125 5.89 20 Cp 3 I Ss 6 Qc ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 20 of27 WG1955215 QUALITY CONTROL SUMMARY Metals (ICP) by Method 6010B L1553536-01,02,03,04.05,06,07,08,09,10,11.12,13 Method Blank (MB) (MB) R3859131-1 11/09/22 17:19 MB Result Analyte mg/I Arsenic U Barium U Cadmium U Chromium U Lead U Selenium U Silver U MB Qualifier Laboratory Control Sample (LCS) MB MDL MB RDL mg/I mg/I 0.0333 0.100 0.0333 0.100 0.0333 0.100 0.0333 0.100 0.0333 0.100 0.0333 0.100 0.0333 0.100 (LCS) R3859131-2 11/09/22 17:21 Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/I mg/I % % Arsenic 10.0 9.99 99.9 80.0-120 Barium 10.0 10.2 102 80.0-120 Cadmium 10.0 10.1 101 80.0-120 Chromium 10.0 10.1 101 80.0-120 Lead 10.0 10.3 103 80.0-120 Selenium 10.0 10.9 109 80.0-120 Silver 2.00 1.93 96.3 80.0-120 L1553536-08 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1553536-08 11/09/22 17:24 • (MS) R3859131-4 11/09/22 17:30 • (MSD) R3859131-5 11/09/22 17:33 Analyte Arsenic Barium Cadmium Chromium Lead Selenium Silver Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits mg/I mg/I mg/I mg/I % `, % /0 % 10.0 ND 9.85 9.85 98.5 98.5 1 /5.0-125 0.0549 20 10.0 0.334 10.3 10.4 100 100 1 75.0-125 0.135 20 100 ND 996 999 996 999 1 7 f1-17 0771 7fl 10.0 ND 9.99 10.0 99.9 100 1 75.0-125 0.160 20 10.0 ND 10.1 10.2 101 102 1 75.0-125 0.563 20 10.0 ND 10.7 10.8 107 108 1 75.0-125 0.611 20 2.00 ND 1.92 1.92 95.9 96.2 1 75.0-125 0.270 20 ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 21of27 WG1955215 QUALITY CONTROL SUMMARY MIME Metals (ICP) by Method 60108 L1553536-01,02,03,04,05,06,07,08,09,10,11,12,13 L1553536-12 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) [1553536-12 11/09/22 17:36 • (MS) R3859131-6 11/09/22 17:39 • (MSD) R3859131-7 11/09/22 17:41 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/I mg/I mg/I mg/I % % % % Arsenic 10.0 ND 9.61 9.62 96.1 96.2 1 75.0-125 0.156 20 Barium 10.0 ND 10.1 10.1 101 101 1 75.0-125 0.380 20 Cadmium 10.0 ND 9.83 9.79 98.3 97.9 1 75.0-125 0.3/0 20 Chromium 10.0 ND 9.86 9.88 98.6 98.8 1 75.0-125 0.248 20 Lead 10.0 ND 9.97 9.94 99.7 99.4 1 75.0-125 0.284 20 Selenium 10.0 ND 10.2 10.3 102 103 1 75.0-125 0.341 20 Silver 2.00 ND 1.86 1.86 93.C 92.9 1 75.0-125 0.176 20 C 3Ss 6 QC ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 22 of 27 i?3SaI_ _ - _ -: - GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On -Site Data, Sampling Collection Dates/Times, End Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL ND RDL Rec. RPD SDG U Analyte Dilution Limits Original Sample Qualifier Result Uncertainty (Radiochemistry) Case Narrative (Cn) Quality Control Summary (Qc) Sample Chain of Custody (Sc) Sample Results (Sr) Sample Summary (Ss) Qualifier Method Detection Limit. Not detected at the Reporting Limit (or MDL where applicable). Reported Detection Limit. Recovery. Relative Percent Difference. Sample Delivery Group. Not detected at the Reporting Limit (or MDL where applicable). The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. If the sample matrix contains an interfering material, the sample preparation volume or weight values offer from the standard, or if concentrations of analytes in the sample are higher than the highest lim t of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. The non -spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality ccntrol sample. The Original Sample may not be included within the reported SDG. This column provides a letter and/or number designation that corresponds to addition it information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state "ND" (Not Detected) or "BDL" (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could cetect or report for this analyte. Confidence level of 2 sigma. A brief discussion about the included sample results, including a discussion of any non -conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Description The remainder of this page intentionally left blank, there are no qualifiers applied to this SDG. Cp Cn GI ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 23 of 27 ACCREDITATIONS & LOCATIONS Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama Alaska Arizona Arkansas California Colorado Connecticut Florida Georgia Georgia' Idaho Illinois Indiana Iowa Kansas Kentucky' 6 Kentucky 2 Louisiana Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana 40660 17-026 AZ0612 88-0469 2932 TN00003 PH -0197 E87487 NELAP 923 TN00003 200008 C -TN -01 364 E-10277 KY90010 16 A130792 LA018 TN00003 324 M-TN003 9958 047-999-395 TN00003 340 CERT0086 Nebraska Nevada New Hampshire New Jersey—NELAP New Mexico' New York North Carolina North Carolina North Carolina 3 North Dakota Ohio—VAP Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee" Texas Texas 5 Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming NE -OS -15-05 TN000032021-1 2975 TN002 TN00003 11742 Env375 DW21704 41 R-140 CL0069 9915 TN200002 68-02979 LA000356 84004002 n/a 2006 T104704245-20-18 LAB0152 TN000032021-11 VT2006 110033 C847 233 998093910 A2LA A2LA — ISO 17025 A2LA — ISO 17025' Canada EPA—Crypto 1461.01 1461.02 1461.01 TN00003 AIHA-LAP,LLC EMLAP DOD USDA 'Drinking Water 2 Underground Storage Tanks 3 Aquatic Toxicity ° Chemical/Microbiological 5 Mold 6 Wastewater • Not all certifications held by the laboratory are applicable to the results reported in the attached report. ' Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. n/a Accreditation not applicable 100789 1461.01 P330-15-00234 Cp 'Crd I _ sod ACCOUNT: GEI Consultants - CO PROJECT: 2203242 SDG: L1553536 DATE/TIME: 11/10/22 13:21 PAGE: 24 of 27 Name%Address Billing Information aeal,ts / nnta+net / Pr sfnrat,vA Chain of Custody Page of Company GE- Consultants,-- CO Tom Daigle 4601 DTC Boulevard Pres Chk _ , " - - 4601 OTC Boulevard Suite 900 Denver CO 80237 Suite 900 � Denver, CO 80237 1TCL) RCR,R S 1L-CIr-N©Pres ace VEORE �OVaNC,Ne SCeCHCE Report to Torn Daigle Email To TDaigle@geiconsuttants com,jneff@geiconsulta MT JULIET, TN 3065LebaronRd NounllYlo TN 37122 wnssnves acMaweeEcmene aM acurx+na d era ProjectPescnpuon City/State ,�, j t Plea aCode North Campus Sampling 2022 _ j Collected PT MT CT ET va.tuma+�ncwd,ecnaraonex ResNrnro o:ul,� a �v*�n dress,,, a,rs Phone 303-264-1090 Client Project 8 2203242 Lab Project g GEICONDCO-2203242 i Moll, ; L. 3c..36Collected Tabletr� by (print) Site/Facility ID g P O If , -142.-'2,.'..:,--- 0f�C1i r2O34 �J S0.r' (%h� 2 �, Acctnum GEiCONDCO Collere5ed by ( i at e) I Ii, Rush? (Lab MUST Be Notified) .__—same Day Frve Day Quote R Template_T218032" Prelopin P956908 , i Imriedeately _ /// Ice N Y Next Day `5 Day (Rad Only) Date Results Needed _T ve Day _10 Day (Rad Only) Three Dlay No ti PM 824 - Chris Ward - PB Packed on _ _,/,_ ` of 'tn.' Shipped Via FedEX Ground Sample l0 Matra I Depth Date Time II Remarks I San, R (lab only) TComig/Grab ( 1 -SO- 1 ,._ Z t SS LT_ IC, 11-,-zz. I. z., 1' X - 01 __Qi,7 .1 Mitzi--3a----S k-ito,;.,c�.. C, ss ;.."S 2y 11-) z:Z. 1�].� 1 1 X A(;- tai- l \OrlTo� / j C ss 03 a`k 11 n0. ova ociERCJ) 1 X u 0.-4 .._^D' PgR-'-k,,,'_)-a-93��o-oco - C ss 72.9 a) )► a a0 1O,-1,3-- 1 X -'J JQ-'o27crr-�-tlo,a0. :b � St 0Tl a3' 11-,-zZ 11'-i�, 1 X ,RR r c 1 AAR-c0---o a3 -, o,a...f C SS 2� . t .rte �-1 II-, =z2, 1.3.',', 1 I X` G (4.1 `40 ia° til -;A - I Ito,0 a ZC SS ICi c..e --" ix ...,' J ., A7 4 -s-.10-aaa5-,voaa c ss ac,' 1,_a aa_. 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If preservation required by Login Date/Time , eelllTgt,ied by (5igna 3r- ei-= Date Time Received for lab by (Signature) f Otte- Time � (1�F A/ �O(1 " Hold Condition IJCF / rra •Company Name/Address. Billing Information: i Chain of Custody Pagea, of GEI Consultants - CO Tom 4601 Daigle DTC Boulevard Pres Chk 4601 DTC Boulevard Suite 900 Denver. CO 80237 Suite 900 Denver, CO 8O237 i (-Vaces PEOPLE •uv.NcIw+r SOENCL Report to: Email TDaigle@geiconsultants.com.jneff@geiconsulta To MT JULIET, MOSLtt„nw: k. M:;,,;,i;urs.t,TN37121 TN Tom Daigle • "'� ' Submitting a sample Ina ius chain d to:stodY kaew4dgmsnt Project Description: City/State For- L Please Circle: cofst+tute$ a and acceptance of the Pace. Terms anti tonawatsfound et: pc.r North Campus Sampling 2022 Collected: PT CD C ET Mtas //info Sac ssbs <Gn+Jhsmtwpa standard term ad+ Phone. 303-264-1090 Client Project IS 2203242 Lab GEICONDCO-2203242 Project # vsISDG ' # (//5315C16. C) a H1 3 4 Collected by (print): Site/Facility ID I# P O. # O 2 4, 34.44 k...11c4+ Agg. c)%A ; cY Acctnum: GEICONDCO alla Collected by ignature): Rush? (Lab MUST Be Notified) Quote ## Y Template:T218032 r I Same Day Five Day Prelogin: P956908 padu ' Next Day S Day (Rad Only) Date Results Needed CCLP RCRA F PM: 824 - Chris Ward Immediatt Two Day 10 Day (Rad Only) No. Packed V ce N Y Three Day of PS: ~Entrs Shipped Via: FedEX Ground • Sample ID Com r Matrix Depth Date Time 1 Kernark, 1 .:a-r,r;.ie I lab or •y1 Ss — 1 Xes G - 3 • L1O% - 0-i it it ga. _____ 1 x gen, i lei_ L. 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Tracking Numbers 6�3 3g1233q6 6oS3 3O233ZG Tepertu re NORTH CAMPUS ARR SOIL SAMPLING DECEMBER 2022 Data Validation Summary Report F� GI...I Consultants Data Validation Summary Report I Appendix C G E I Consultants Site: Aurora North Campus Sampling Laboratory: Pace, Mount Juliet, TN Report Number: L1553536 Reviewer: Lorie MacKinnon/GEI Consultants Date: December 13, 2022 The samples included in this review are listed below: FIELD ID LAB ID FRACTIONS VALIDATED ARR-I-SO-1516-110122 L1553536-01 TCLP Metals ARR-2-SO-2324-110122 L1553536-02 TCLP Metals ARR-3-SO-2324-110222 L1553536-03 TCLP Metals ARR-4-SO-2930-110222 L1553536-04 TCLP Metals ARR-5-SO-2728-110122 L1553536-05 TCLP Metals ARR-6-SO-2324-110122 L1553536-06 TCLP Metals ARR-7-SO-1920-110122 L1553536-07 TCLP Metals ARR-8-SO-2729-110222 L1553536-08 TCLP Metals ARR-9-SO-1920-110122 L1553536-09 TCLP Metals ARR-10-SO-1920-110122 L1553536-10 TCLP Metals FD -SO -110122 L1553536-11 TCLP Metals EB-110122 L1553536-12 TCLP Metals EB-110222 L1553536-13 TCLP Metals Associated QC Samples: Equipment blanks: Field duplicate pair: EB-110122, EB-110222 ARR-7-SO-1920-110122/FD-SO-110122 The above -listed soil samples and equipment blank samples were collected on November 1 and 2, 2022 and were analyzed for toxicity characteristic leaching procedure (TCLP) metals by SW -846 methods 1311/6010B/7470A. The data validation was performed in accordance with the USEPA National Functional Guidelines for Superfund Inorganic Methods Data Review (EPA, 2017), as well as the methods referenced by the data report and professional and technical judgment. Level 2 Report QA/QC Items Evaluated Sample receipt condition Sample hold time and preservation Method and equipment blanks Laboratory control spike (LCS)/LCS Duplicate (LCSD) results Matrix spike (MS)/Matrix spike duplicate (MSD) Results • Field duplicate results • Sample quantitation limits • Samples requiring dilution • Laboratory and Sample Nonconformances Site: Aurora North Campus Sampling Report Number: L1553536 Date: December 13, 2022 The analytical data is of adequate quality and sufficient accuracy, precision, and sensitivity and may be used for decision -making purposes. Results are usable as reported or usable with minor qualification due to blank contamination. These results were considered valid; even though some were qualified as discussed below. The validation findings were based on the following information. Sample Receipt Condition: The sample receipt condition was acceptable. Select sample IDs or collection dates were incorrectly reported in the data report. The following table summarizes the sample ID/date discrepancies. Laboratory ID Sample ID/Collection date incorrectly reported in laboratory report Correct ID/Collection Date L1553536-03 ARR-3-SO-2324-110122 ARR-3-SO-2324-110222 L1553536-04 ARR-4-SO-2930-110122 ARR-4-SO-2930-110222 L1553536-08 ARR-8-SO-2729-110122 ARR-8-SO-2729-110222 L1553536-13/EB-110222 11/01/22 110222 Sample Hold Time and Preservation: Analysis hold time criteria were met. Method and Equipment Blanks: Contamination was not detected in the associated laboratory method blank samples and equipment blank samples except where noted below. As the samples were shipped and analyzed together, the equipment blank dated 110222 was used for contamination evaluation of all samples. Analyte Blank ID Concentration 2x Action Level 10x Action Level Validation Actions Method MB Qualify the results for barium as nondetect at the Barium EB-110222 0.107 mg/L 0.214 mg/L 1.0 mg/L RL in samples ARR-2-SO-2324-110122 and FD -SO -110122 . Estimate (J+) the positive result for barium in samples ARR-I-SO-1516- 110122, ARR-3-SO-2324-110222, ARR-4-SO- 2930-110222, ARR-5-SO-2728-110122, ARR- 6-SO-2324-110122, ARR-8-SO-2729-110222, ARR-9-SO-1920-110122, and ARR-I0-SO- 1920-110122 ; High bias. Associated samples: ARR- -SO-1516-110122, ARR-2-SO-2324-110122, ARR-3-SO-2324-110222, ARR-4-SO-2930- 110222, ARR-5-SO-2728-110122, ARR-6-SO-2324-110122, ARR-7-SO-1920-110122, ARR-8-SO-2729-110222, ARR-9- SO-1920-110122, ARR-I0-SO-1920-110122, FD -SO -110122 B ank Actions: If the sample result is < RL; report the result as nondetect (U) at the reporting limit (RL) or reported value. If the sample result is > RL and <2x blank contamination detected; report the result as nondetect (U) at the reported value. If the sample result is > RL and < 10x Action Level; professional judgment was taken to report the sample result as estimated (J); biased high. If the sample result is nondetect or> 10x Action Level; validation action is not required. LCS/LCSD Results: LCS/LCSD recovery and precision criteria were met. GEI Consultants, Inc. Page 2 of 4 Site: Aurora North Campus Sampling Report Number: L1553536 Date: December 13, 2022 MS/MSD Results: MS/MSDs were performed on sample ARR-8-SO-2729-110222 and EB- 110122. All recovery and precision criteria were met. Field Duplicate Results: Samples ARR-7-SO-110122 and FD -SO -110122 were submitted as the field duplicate pair with this sample group. All results were nondetect in these samples. Sample Quantitation Limits: Results were reported down to the quantitation limits only. Samples Requiring Dilution: Dilutions were not required. Laboratory and Sample Nonconformances: Additional nonconformances were not noted. GEI Consultants, Inc. Page 3 of 4 Site: Aurora North Campus Sampling Report Number: L1553536 Date: December 13, 2022 DATA VALIDATION QUALIFIERS U - The analyte was analyzed for, but due to blank contamination was flagged as nondetect (U). The result is usable as a nondetect. J - Data are flagged (J) when a QC analysis fails outside the primary acceptance limits. The qualified "J" data are not excluded from further review or consideration. However, only one flag (J) is applied to a sample result, even though several associated QC analyses may fail. The `J' data may be biased high or low or the direction of the bias may be indeterminable. UJ - The analyte was not detected above the reported sample quantitation limit. Data are flagged (UJ) when a QC analysis fails outside the primary acceptance limits. The qualified "UJ" data are not excluded from further review or consideration. However, only one flag is applied to a sample result, even though several associated QC analyses may fail. The `UJ' data may be biased low. JN - The analysis indicates the presence of a compound that has been "tentatively identified" (N) and the associated numerical value represents its approximate (J) concentration. R - Data rejected (R) based on an unacceptable QC analysis should be excluded from further review or consideration. Data are rejected when associated QC analysis results exceed the expanded control limits of the QC criteria. The rejected data are known to contain significant errors based on documented information. The data user must not use the rejected data to make environmental decisions. The presence or absence of the analyte cannot be verified. The hierarchy of data validation qualifiers and bias is listed below: R > J or UJ The R qualifier will always take precedence over the J or UJ qualifier. J > J+ or J- A non -biased (J) qualifier will always supersede biased (J+ or J-) qualifiers since it is not possible to assess the direction of the potential bias. J = J+ plus J- Adding biased (J+, J-) qualifiers with opposite directions will results in a non - biased qualifier (J). UJ = U plus J The UJ qualifier is used when a (J) qualifier is added to a non -detected (U) result. GEI Consultants, Inc. Page 4 of 4 , 0122 Collaitt atyittli t; ;1 1181'23 14:28. Preparation N,/ Method 1311 Analyte icI F Entaa`Gan Fluld leial pH Fina4Rt1 Metals PCP} by Method 60108 Analytg B1 Cadmium Ctrocilain Lead &lemur, Silver SAMPLE RESULT'S - Q1 Mtn t rime Pi4120Z712:38.57Pt WG145;247 1E,xrs4V i220:67..INc 11!11 5442 7.37 1114,2027 11i8.57 PM W611141O 4'.84 ' 1k38y81 Itt W6195.4 17 ACCOUNT: GE1Consultants ,CO Roam 4u9171ar nvA hi{1 5,:211 3' ND NB ND ND N1A Suitt mg,i C.2fl data/me 114271202₹ 10:21 101955017 RCS 15O DI1ulinn Analysis latch mgt mpg date / twee 01110 5 1 01115/20221D02 WO1S55215 ooa 100 I 1160052241002 Y668 3235 010 1 111l"i51202i x:02 Wt119M15 4;1017 5 NI1023318;0 2 1?J 1901p O1116 5 1 1!"11/20221,02 1166% 0.100 ₹ 1 1 1502 W019. OVO 5 M}1120418312 1116195 15 PROJECT: 2203242 10 1042 211ME. L1550005 100221221 74027 I'or 3212.3:57 Wrq WG1- 1247 • 12:39:57 aA1 W019954241 1:140 1≥3S 57 PM • . WO0421? Mercury: by Method 7470A ' Lead Se19niom (1CP), by Method 60108 lawn +nty1 mc�fl moo QuaURer ROL 00 tot 0100 010.0 0100 ©.100 Limit algal 0.20 9.tmlt • 1d07,2'1:33 1YG195C767 a1Aa0oo Anaysis date/ One 11(00/202216:06 19: 1144020220100 ■ G21 Colsotradts .00 mGe ;21 44 27 Cui.eotiad 7i*t5dttw. {*122t Preparation by Method 1311 taP Fxfia[tIDD Fluid Inital rH Finotp11 'SAMPLE R S ' t.t004005 Result talxrer Prep dole f time 1L'N222212:38.57 PM *0954247 1 11,M120220:3515744,0 W615542c 7,30 17/4/202212:38 57 PM *0904247 4:85 11,0022:12739,57 PM '00199424? Mercury by Method 7470A analyte Maury m5A Np Metat5 (ICP) by Method 6010E 0 2100 Ik mg4 a 711 4910411/n 1110712022 10--35 Batt 2 Cadmium CMre itan Wad SereMixo Savet 09 Cerisubois - CO Result eq NO ND ND ND ND ma; 441 rnir ©.100 0100. 0.100 0700, 0100 AG1db 40100 177 Glklttcrn Analysts 9atc51 dote ttoe. 11109002710:01 451-955215 11129320721009 W010555215 11109;-212211:09 *519405211 11x20/2022 016.09 !NOVIS / 111202222 9229 0001:045215 164491251221O9 w0199$215 M51202218:09 145199$755 Pfotoc F; ; 2203042 01553575 0670110000; 10142221221 ilWoiliketria: at Preparation by Method 1311 YCLP E I60.1tra nig Intl.! pH AMPLE kg(155352 : . R R 1Ju..aie Prep b date Mme 11/4202212:36:.57 PM WG1954547 144402$`Ei3nsn pm vrotasfio 710 ,11412022 1218.57 PM W61454247 4.63 TE41#4212,5057PM 'EM64;14-7 try by Method 747OA bertvey Result 1:04 NC Metals (IC by Method 60108 Anaheim Arseik titialn GnGmwm Ohtcntrn Lead 5EIEIWI1t'I Sever ACCPUNr: GEICtlnsatta..00 mqN ND bay. ROL U. tl8rltarr Analysts Hatch _ 004 e04 ease /time 4.0100 4.20 11/07,,2022 10.37 WG1955ots7 Gkrd Fier ROIL Limit 0tl1tt Ant is 00th mg4 nit del tune �^ 0.100 5 1 0•6912022 1812 . WG1955215 +moor #1109120021812 W6655215 0.100 1 11,04+10221812 We1955215 0100 5. f na119b20227B 0 wG#e55216 0.100 5 1 1111191202210:12 W61955x15 0.100 1 # 11109120231112 WG1455215 0.100 5 1 11001202210:12 1!6:1355215 PROJECT, SOG: DATE/TIME; PASO 2103222 13552436 10502213:21 10 of 27 SSA Mt LE Preparation by Method 1311 Result 1..LaLah le, Peep thste t l=ima 11t41Z922 0:38:5.7 PM 0014542817 1 111,1t2022,1p1t57,RM "414$4140 9.18 r 202112'33.57 IN V101054247 a.&7 11"le 4228:P PM 00011914242 Analysts Top Ere -Rater FI111d Mittel R1 1Uralpii Mercury by Method 7470A Mercury Retiai 10,01 Hu Metals (ICP) by Method 60108 r R©t 00102 .311 0.20 Anatlyte Arsemc Barium Cadmium Ctrcu111rdin Least Selenium 3iltir.. wa [QnstrRlat is -EC1 yr ND No ND eng/I a Tot 9.100 0.100 0100 4.10© 10,00 a.;oa 100 .5 PROJECT: 2000240 nil ctatellmme 11107O0x210.39 Batch �1r4s551157 date/ ti. 1ro912aao 18:45 W.9552215 11I001202210,15 0015505215 111091702210:15 y1%1055215 1 101101202216;15 193'52IS 11rt'1, 005002'18:11 0001550205 1 .1110R202218:15 101311150001 1 0009202214.122 W519052100 mss: DATE/TIME: 05-035015 1213:$1 11x027 . ARR4- 2 244101Z Coftected detetleve 11/01/141i33 Preparation by Method 1311 Anatyie. 1211 £3trachoe Fluki Inhial pH 749 tuatpFi 4:93 Mercury by Method 7470A tlelalblet RRL Limit m(�4 ELDITIO 4.20 Ana9e Mem., 145 SAMPLE RESULT 415935$i_ Prep 8ilttit date 1 IL�e••� lttr 202212:3E-57 X11 INCr1954247 it,112t}2212:3857 PM 001054247: 10412222 3:38-57 PM 00.1954247 141412022-1 :5710 5004247 {ICP) by Method 60108 hnrbyte Arsenic Balm Cadmiurrt Chromium Lead Setetttten Sliver ACCOUNT 49 Consultants • CO mve i2 �?.9t}_ 7 Hfl ND ND Nn mgn 7401W 30454ls stale / time 1111)=+2022 io;ur W0196506? R L Limit L7"ua Analysis 9atclt rog11 ing'1 date / Arne [-V0 s 1 1000X221818 i:0.1955215 Moo ius 3 iifostap21Vat wud9tyO65 iron 1 1 11 91202218:18.: WCr1955215 0117 t 5 i tiptiamonitia VPCr1 7.100 a 0001212221618 ING1 y5215 0.100. t 1 W0912022 ISM .. 52#5 11100 5 1 5.202218.78 W61952'b 2203242 12053031 DATUTHE: 111.12213.31 SAMPLE .LT 07 Preparation by Method 1311 Anal* ICLPtArkilen floa Initia4N AVOW 4,42 Mercury by Method 7470A Artalyle Meters (ICPr by Method 60108 Analyse Arsenic - Cadmium arm. • 5elerkiin Shaer Ca Censer... CO Result ND NO ND Neeuk 9ueldler Prep date 1 ttme 11J pZ212 38'57 PM 061654247 maftgitn$7.A4 010950347 1V4in.2211': :5i PM WCt115±t147 X22 12;05'771+8 W354297 m�s�. t4ateh Pete / 1irt1 ti0ll0412111;45 00 5867 RDL L mit Dig mg, e.rDine } 1 riG912022 18:21 WGi955215 0:: ICC 154410040831 8483155 OW t 1 11..91422 511 1841455215 tta14o: 5 1. 1109420201W;ii' 1450515" 01110 Ing120221Q.21 GISSOM 1 9 #> '7o2216121 0189! .100. 5 1 1i(fl912[12218:21 4x61955215 22x3242 i G 1144/401541 PAGE: 13. -pr 27 ret MapH R: Mer.cur y ty t ry ND Metals (1CP) Oy Method 6O10B :hod 7470A Lira fn C�AT€IR PAGE 1014122'112$ 14 •ot27 SAME) Preparation by Method 1311 D muit AnaVte TCLP E..ac> lela RIM loaf psi dfaad{1: . Mercury by Method 7470A Analpta Mormy firshnlr 1313 Gedmi+am ChroNcia ICd 10100)et,' y ACCOUNT: El Cam is Cc7 NC NO Metals (IC Its ml Prep date 1 time �1yti44r?,�ky1�121 : .-5y7 aP.IkH, Vifi€954'i2y��1.7 it4ryo2215DS5t:141 `'+4? C`47 t,4 02217311.57,41 W111 4`! 1 21242212 3411. . . `1111 3M 51111 f] a P1t3ix ml#4 date f time :Kann'1131 :111 1 ₹ 0tii },p19rt02.232}3 11,097T1t1221B,30 std. MACEPTIMEr PAGE: 115 S ftf f f22'1351 $55122 rss mote E'Mists Preparation by Method 1311 Apalyte 1CLPpdre len add- luta' pH 4181pti Result 4,84 1°tep datr, tore 11/M202212.3S:51 X1,4 061954201 11/4;002212,3Z57 PM W68424041' 1V4a202212:38:57 PM WG1954047 111433420121857PM 0110544342 Mercury by' Method 7470A Result 0uautttr RDL lo0lyte FrVI i Mercury NO 0 0100 Metals (1CP) by Method 6010E Limit Mutton 4,1184 is t3oIst date 1 time 20 11071202210:50 1'61.955067 R sslt 1u fillQr R0L Afeatfte rnpl mtyf Arsenic 14(1 0.100 Rectum 0.503-. 0.100 Cadmium NO 0.100 Citt01040 NO 0.100 Lead N0 0100 Sele1lttel NO 0.100 Silver ND0.100 ACb61JiNT-, Ogt Consultants -CO PROJECT, 2203242 LIM Dilution Analysts 3atch date' lime 111091202215.31 18611155215 00515115715 I 1503)00221$033 0019511215 I... Ssatarta,33•W19e I I 221'3:33 1YG1955215 114920221533 W 95216 1110,12022 1923 4893955215 2010(11151 PAGE w:1O/21 31 to of 3 F GI PL i uL 01!3048. Preparation by Method 1311 noatpu Mercu 1 bey Method 7470A Metals (ICI) by Method 60106 Ot4 Anaty Anemic • [edmtum .hromiraan Lead 5eleixui;�s Sliver ND :4ND U NO NQ t0 Qua Wet, �t mg/1 .141 • 0,140 Lima v;i6795.424T 6419 47 *61054247 4%1964247 date { time 110312022: 1' 11 '233x6 11/09/2022 58:3£ 1562022/ 4 401412221906 152240: 15554202218;36 4ti6055€1215 FrO+JJ1<Cf: > 2353Z44 • 5* 4P619521�s a 1461 95525 X15 444340'2121 17 44 11 PAGE: NIA WA 4re18tee en e; t4f@1rf T WAS' Preperahon by Method 1311 Result r.igii ar Prep ante! rune 114+202312-38-S1 pM WG10642d7 10(20` 1TOS57.Iligi Wads:. 1VAt20221T.3L:57 rM WCi954247 W41422 W0,0PRI VfGiOO0242 Mercury by Method 7470A Anaiyle Arsenic Annum Cadmium Chromium Lead Smlediupt Silver itesuft ND 1CP) by Method 60108 Result Cprtalilr R0L Limit m9AriTI, m4n date/time ND 0100 S 1 : m902217.36 .itear20221T.EA WO 6l , NC 0,100 1 11/09,2022'17:36 WG1955215 NO 0.100 S 1 floR!/2022.1;3u VAS19662i5 ND 0.100 a 1 W0912022 2 17:36 V1G1955211< ND 1 1 tif09,2022 1716 wu sc tat 0.1110 s 1 11tq.3221736 1! 01955215 ACCOUNT: GEI Consultants 01W L1rr81 Milan Analysis mg/ m9A darer tar» 0.0100 13.26 1 1110712022 ID, .01955067 PROJECT: 22242' Li553r3s CiATEttIlvi6i 1[!1/1271821 PAGE: 18°eV 3 As Ch Preparation by Method FT - an lnI5N I. A 15rh3r.'o#c: • MN Mercury by Method 7470A Anal* Me,cwy ACCOUtOt ARCetuuttents NQ ND oate i the 1164:4 12:38:5x tyh4 WG356a37' 1i ?'s 00%1 .WM50471 4545221?38:57146 w61 47 *002 4 4O5,4'247, 0.500 5 '0 0,100 5 t4e�J9tme W912022;9:558 date 11. 1�Q221835 11J0'2022t$a35 woriona-397 .OgZ. 11,'55525x71825 67 0AT555555 Mat241311 PAiSe 1D'or..27 1;'l 1Torn Daigle I45O1 OTC Rein vard ,Sidle 900 parnr, r. Co 00237 - enr,� Tiae ekanxel!sets.c I4 {F 0242' Hello