The URL can be used to link to this page

Browse Search

Home My WebLink About972864.tiffNo• rth Weld Sanitary Landfill 40,000 WCR 25 Ault, Colorado 80610 970/686-2800 • Fax: 970/686-1031 November 25, 1997 Q Mr. Stephen Laudeman: Colorado Department of Public Health and Environment Hazardous Materials and Waste Management Division HMWMD-SWIM-B2 4300 Cherry Creek Drive South Denver, Co 80222-1530 Mr. Trevor Jiricek Weld County Health Department 1517 -16th Street Greeley, Co 80631 Subject: North Weld Sanitary Landfill (NWSL) Revised Groundwater Monitoring Plan Dear Mr. Laudeman and Mr. Jiricek: A Waste Management Company Weld County Planning Dept. DEC 0 2 1997 RECEIVED Enclosed for your review and approval is a revised Groundwater Monitoring Plan (text only) for the NWSL. This Plan was revised pursuant to the Colorado Department of. Public Health and Environment (CDPHE) and Weld County Health Department (WCHD) letters dated April 2, 1997 and April 21, 1997, respectively. In their letters, CDPHE and WCHD approved a modification to the groundwater monitoring plan which allows NWSL to temporarily discontinue monitoring of MW -9. As requested in CDPHE's approval letter, this plan reflects the approved modification and provides specific information on when monitoring of MW -9 will resume as well as ongoing inspections of surface conditions at MW -9. Monitoring and inspection information for MW -9 is discussed in Section 6.0 of the enclosed plan. In addition, the groundwater monitoring plan was reviewed and further modified by NWSL to include general updates and other revision through letter correspondence since the previous plan was submitted on October 7, 1996. The primary revision are describe below: Revised Section 1.3 (Page 2) to remove reference concerning airspace and site life. • Revised Section 4.1 (Page 15) to reflect a design modification approved by CADRE and WCIID that allows a reduction in the sand drainage layer from 12 inches toff inches. • Revised Section 8.1 (Page 23) to update information concerning the statistical program. I 1pdmcd Infurntafion included in Appendix. 4 (Directory). I di. 4 I (i 91 28/ RO/ 9 Q Letter Stephen Laudeman and Trevor Jiricek 11/25/97 Page 2 • Revised Appendix.6 to remove sampling equipment operations manual information. This information was extraneous and insignificant to the intent of the groundwater monitoring plan. This information was replaced with appropriate regulatory approvals. Accordingly,, Appendices titles have changed. Please discard the existing and place the enclosed text and corresponding informatlonincl t the revised cover sheet in the Groundwater Monitoring Plan submitted to CDPHE and` on October 7, 1996. If you have any questions concerning these revisions, please contact either of ds at (§70)•686- 2800. Sincerely, Alan Scheere Bill Hedberg Division V.P. Landfill Operations Environmental Specialist Enclosure AS/as cc: oria Dunn GDES, w/ nc. Randy Thompson, RUST, w/ enc. COLORADO November 13, 1997 Waste Management Company North Weld Sanitary Landfill Attn: Alan Sheere 40,000 WCR 25 Ault, Colorado 80631 Dear Mr. Sheere: DEPARTMENT OF HEALTH 1517 16TH AVENUE COURT GREELEY, CO 80631 ADMINISTRATION (970) 353-0586 HEALTH PROTECTION (970) 353-0635. COMMUNITY HEALTH (970) 353-0639 FAX (970) 356-4966 Weld County Planning Dept. N0V 141997 f Ec aajv b Let this letter serve as approval of the Fugitive Dust Control Plan which was submitted to Trevor Jiricek of the Weld County Health Department Environmental Protection Division. The control plan for your Construction Permit ( # 93WE113F) issued by the Colorado Department of Public Health and Environment, Air Pollution Control Division is adequate to meet Weld. County's requirements for fugitive dust control under item 3c of the Certificate of Designation Special Review Permit for East Weld Sanitary Landfill. If you have any questions regarding this matter, please feel free to contact me at (970) 353-0635. Sincerely, Troy E. Swain Environmental Protection Specialist CC: Trevor Jiricek North Weld Sanitary Landfill 40,000 WCR 25 Ault, Colorado 80610 970/686-2800 • Fax: 970/686-1031 September 22, 1997 Mrs. Gloria Dunn Weld County Department of Planning Services 1400 North 17th Avenue Greeley, CO 80631 SUBJECT: NORTH WELD SANITARY LANDFILL (NWSL) USR-895 DEVELOPMENT STANDARDS Dear Ms. Dunn: t% A Waste Management Company Enclosed are letters of approval from the Colorado Department of Public Health and Environment and the Weld County Health Department dated April 2, 1997, and April21, 1997, respectively. These approvals allow NWSL to temporarily discontinue monitoring of groundwater monitoring well MW09. MW09 was installed to monitor a very localized perched water zone located in the extreme southeast corner of the site. The current landfill phasing plan shows landfilling would not occur over the perched saturated zone until filling progresses toward the completion of Phases.3a/3b. Until landfilling occurs in those areas of Phase 3a/3b which overlie the perched water zone, there is no likely pathway for migration of leachate to the perched water zone. Temporarily discontinuing monitoring of MW09 would not affect the ability of the remaining monitoring network to detect a release from the landfill to the uppermost aquifer. - In accordance with Section 34 of the approved Certificate of Designation Development Standards for the NWSL, Waste Management Disposal Services of Colorado Inc., hereby files the following minor change with the Weld County Department of Planning Services; • Temporarily discontinue monitoring of MW9 until landfilling commences in the general area of Phase 3a/3b which overlies the perched water zone. If you have any questions regarding this filing, please call us at (970) 686-2800. Sincerely, att -rep Alan Scheere Environmental Specialist AS\as cc: Trevor Jiricek, WCHD Stephen Laudeman, CDPHE Bill Hedberg Division V.P. Landfill Operations a division of Waste Management Disposal Services of Colorado, Inc. DEPARTMENT OF. HEALTH 1517 16TH AVENUE COURT to GREELEY, CO 80631 ADMINISTRATION (970)'35305862 1EAL'TH'PROT(CTI,®N:(97 0)1?353 0635 MOOiTIY HEALTHt,(970 b?. ,06391 FAX`(970)".-36`.-4966 Mr Bill'Hedberg_;5 rr Mr. Alan=Scheere` ,, y g+r North'Weld Sanitary. Landfi 4o;000 Weld County Road:; -';Ault,,Colorado 80610',,: e: Request to Temporarily Discontinue; Monitoring bt MW9 at the North Weld Sanitary Landfh^' dear Mr. Scheere and Mr. Hedberg: r; +9sc i,,...<7 as fi�a,�r.• e Weld;County Health Department has reviewed your- request toltemporarily discontinue ground; ;water monitoring at well M1/1/79 at the North Weld Sanitary Landfill, This request was:contamedgin your February 26, 1997aletter4jhe Deparfinenthas`alsoireviewed,the'letterdatedtAprilo2, 1t99rk; from„Steve Laudeman of:the Colorado Department,.ofrPublic\Health'and Environment ' � ¢ a The° Departmentconcursawith bothlyoursubmittal,and=Mt.Laudeman's,letter:; amporra4ily discontinuing the monitoring' of MW -9 will not adversely affect the ability of the' monitoringsystemato detect a release from thefacility. We also agree that monitoring of MW -9 must belresumed at such`;',; time es waste disposal begins in areas that overly the perched'zone of groundwater in`whictl M,W 9 I5 completed. If you have any questions; please do not hesitate to call meat (970) 353-0635, extension122 ..Trevor Jiricek •. -S\upervisor • . -Environmental Protection'Services tj\626 cc: Steve Laudeman, Colorado Department of Public Health & Environment • ii,t tJ' .v © 0 STATE OF COLORADO Roy Romer, Governor Patti Shwayder, Executive Director Dedicated to protecting and improving the health and environment of the people of Colorado HAZARDOUS MATERIALS AND WASTE MANAGEMENT DIVISION 4300 Cherry Creek Dr. S. Denver, Colorado 80222-1530 Phone (303) 692-3300 Fax (303) 759-5355 April 2, 1997 222 S. 6th Street, Room 232 Grand Junction, Colorado 81501-2768 Phone (303) 248-7164 Fax (303) 248-7198 Mr. Alan Scheere Mr. Bill Hedberg North Weld Sanitary Landfill 40,000 Weld County Road 25 Ault, Colorado 80610 RE: Request to Temporarily Discontinue Monitoring of MW -9 North Weld Sanitary Landfill Weld County, Colorado Colorado Department of Public Health and Environment Dear Mr. Scheere and Mr. Hedberg: The Solid Waste Unit has reviewed your request to temporarily discontinue ground water monitoring at well MW -9 at the North Weld Sanitary Landfill. This request was contained in your February 26, 1997 letter. Based on a review of your letter and other information related to MW -9, we agree that temporarily discontinuing monitoring of MW -9 will not adversely effect the ability of the monitoring system to detect a release from facility. We further agree that monitoring of MW -9 must be resumed at such time as waste disposal begins in areas that overly the perched zone of ground water in which MW -9 is completed. To fully document this modification, we request that NWSL prepare a replacement page (or pages, as appropriate) for the ground water monitoring plan. This modification of the plan should include specific information on when monitoring of MW -9 will resume, relative to the site development sequence. Furthermore, although MW -9 will not be sampled, the plan should include provisions to continue to inspect the surface conditions of MW -9, and repairs or maintenance should be carried out as needed. If you have any questions regarding this matter, please contact me at (303) 692-3462. Since Steph j Laudeman, P.E. Geolo_ical Engineer Solid Waste Unit Hazardous Materials and Waste Management Division cc: Trevor Jiricek, Weld County Department of I lealtll, w/o enclosure File: SW/WLD/N\\C/:li North Weld Sanitary Landfill 40,000 WCR 25 Ault, Colorado 80610 970/686-2800 • Fax: 970/686-1031 September 22, 1997 Mrs. Gloria Dunn Weld County Department of Planning Services 1400 North 17th Avenue Greeley, CO 80631 • SUBJECT: NORTH WELD SANITARY LANDFILL (NWSL) USR-895 DEVELOPMENT STANDARDS Dear Ms. Dunn: A Waste Management Company Weld County Planning Dept. SEP 2 41997 RE Ei veo Enclosed are letters of approval from the Colorado Department of Public Health and Environment and the Weld County Health Department dated July 8, 1997, and July 30, 1997, respectively. These approvals allow NWSL to utilize an alternative final cover system design in accordance with$rovisions of the Colorado Solid Waste Regulations Pertaining to Solid Waste Disposal Sites and Facilities (Regulations), 6 CCR 1007-2. The alternative final cover system design for NWSL exceeds the performance standards as outlined in the Regulations. In accordance with Section 34 of the approved Certificate of Designation Development Standards for the NWSL, Waste Management Disposal Services of, Colorado Inc., hereby files the following change with the Weld County Department of Planning Services; • Utilize an alternative final cover system comprised of a total of 2 feet of soil; an 18 inch thick compacted cohesive soil layer having a permeability of less than or equal to 1x1O cm/sec. and a 6 inch thick soil layer capable of sustaining native plant growth. If you have any questions regarding this filing, please call us at (970) 686-2800. Sincerely, Alan Scheere Bill Hedberg Environmental Specialist Division V.P. Landfill Operations AS\as cc: Trevor Jiricek, WCHD Stephen Laudeman, CDPHE a division of Waste Management Disposal Services of Colorado, Inc. wine COLORADO -July 30,.1997.•,:x' YM1�r Alan Scheer& Bill Hedberg North Weld Sanitary Landfill 40,000 Weld County Road 25 Ault, Colorado 80610 a DEPARTMENT OF HEALTH 1517 16TH AVENUE COURT t;GREELEY, CO 80631 ADMINISTRATION (970) 353-0586 HEALTH PROTECTION (970) 353-0635 COMMUNITY HEALTH (970) 353-0639 ' ,:FAX (970) 356-4966 Re: Alternative Cover Design, North Weld Sanitary Landfill Dear Mr. Scheere and Mr. Hedberg: The Weld County Health Department (WCHD) has reviewed the recent correspondence, including Steve Laudeman's letter, dated July 8, 1997, concerning your request for approval for a modification of the design of the final cover at the North Weld Sanitary Landfill. Primarily, your request was to increase the design permeability of the final cover barrier layer from 1 X 10-' cm/sec to 1 X 10-6 cm/sec. The WCHD concurs with Mr. Laudeman's letter, dated July 8, 1997. In addition, we request that you provide the actual leachate volumes accumulated in the sump to us as well as the Colorado Department of Public Health and Environment. If you have any questions, please do not hesitate to call me at (970) 353-0635, extension 2232. Sincerely, /0,�t1-� �.�IilGl Trevor Jiricek Supervisor Environmental Protection Services tj\706 cc '3teve Laudem,m, Dop:irtnictni of I'ublic l Icallli 2. lEnviumnlcnt STATE OF COLORADO Roy Romer, Governor Patti Shwayder, Executive Director Dedicated to protecting and improving the health and environment oldie people of Colorado HAZARDOUS MATERIALS AND WASTE MANAGEMENT DIVISION http://www.cdphe.state.co.us/hm/ 4300 Cherry Creek Dr. S. 222 S. 6th Street, Room 232 Denver, Colorado 80222-1530 Grand Junction, Colorado 81501-2768 Phone (303) 692-3300 Phone (303) 248-7164 Fax (303) 759-5355 Fax (303) 248-7198 July 8, 1997 Mr. Alan Scheere Mr. Bill Hedberg Waste Services Corporation 6037 77th Avenue Greeley, Colorado 80634 RE: Alternative Cover Design North Weld Sanitary Landfill Weld County, Colorado • Colorado Department of Public Health and Environment Dear Mr. Scheere and Mr. Hedberg: The Solid Waste Unit has reviewed your letter of March 13, 1997 in which you request approval for modification of the design of the final cover at the North Weld Sanitary Landfill. Primarily, you request approval to increase the design permeability of the final cover barrier layer from 1 x 10-' cm/sec to 1 x 10-6 cm/sec. Attached with your letter is the March 11, 1997 letter report prepared by RUST Environment and Infrastructure which provides the technical justification for your request. The proposal contained in your letter was previously presented in the report titled "Alternative Design Evaluation North Weld Sanitary Landfill", prepared by RUST Environment & Infrastructure, April 1993, Revised June 1994, and received by in our office in February 1996. Our comments regarding that prior submittal were forwarded to you on June 24, 1996. Based on a review of the information provided, and consultation with other staff of the Solid Waste Unit, we hereby approve the proposed alternative final cover design, with the following conditions: 1. Actual leachate volumes accumulated in the sump must be recorded and provided to us on a regular basis. This information would be similar,,$ that provided in your correspondence of March 25, 1997. 2. If, in the course of filling Phase 1 Module 3, actual leachate volumes do not correspond to the predicted leachate volumes from the HELP models presented in the March 11, 1997 report, our position on this approval will be revisited at that time. We appreciate the efforts of North Weld Sanitary Landfill and RUST in addressing our • Mr. Man Scheere Mr. Bill Hedberg July 8, 1997 Page 2 many concerns regarding your original proposal. Hopefully this approval is a satisfactory resolution to this issue. As you are aware, the Division is required to bill for its review of technical submittals, pursuant to CRS 30-20-109 (2) (b). An invoice for the review of submittals on this project is enclosed with this letter. If you would like any further clarification of our position on this matter, please contact me at (303) 692-3462. Sinc Step 1�Laudeman, P.E. Geolo cal Engineer Solid to Unit Hazardous Materials and Waste Management Division enclosure cc: Trevor Jiricek, Weld County Department of Health, w/o enclosure Michael Heinstein, P.E., RUST Environment and Infrastructure, w/o enclosure File: SW/WLD/NWC/3 (-1-Q3-Loon Weld Sanitary Landfill 1O 000 'NCH 2.9 ii .t, Colorado 80610 .. stn tl�l 9400 - lax- 070/686-1031 March 13, 1997 Mr. Stephen Laudeman Colorado Department of Public Health and Environment Hazardous Materials and Waste Management Division HMWMD-SWIM-B2 4300 Cherry Creek Drive South Denver, CO 80222-1530 Mr. Trevor Jiricek Weld County Department of Health 1517 -16th Street Greeley, CO 80631 Subject: North Weld Sanitary Landfill (NWSL) Additional HELP Modeling and Request for Alternative Final Cover Design Dear Mr. Laudeman and Mr. Jiricek: A Wa to Maurupvnrnl Company The enclosed submittal from Rust Environment and Infrastructure (RUST) dated March 11, 1997, was prepared on behalf of NWSL in response to the Colorado Department of Public Health and Environment (CDPHE) review comments dated June 24, 1996 on the Alternative Design Evaluation submitted on February 29, 1996. The RUST submittal also incorporates issues discussed during a meeting between CDPHE, RUST and representatives of NWSL on October 21, 1996 regarding an alternative final cover design for NWSL. Pursuant to this response, NWSL requests your review and approval of an alternative final cover design comprised of a total of 2 feet of soil; an 18 inch thick compacted cohesive soil layer having a permeability of less than or equal to 1 x 10-6 cm/sec, and a 6 inch thick soil layer capable of sustaining native plant growth. This final cover design would be considered an alternative final cover under Section 3.5.3 of Regulations Pertaining to Solid Waste Disposal Sites and Facilities (Regulations), 6 CCR 1007-2. For alternative final covers the Regulations require a demonstration that the final cover system will minimize infiltration and erosion, and comply with Section 2.1.15 at the relevant Point of Compliance (POC). In support of such demonstration, the enclosed technical report, including additional Hydrologic Evaluation of Landfill Performance (HELP) and Multimedia Exposure Assessment (MULTIMED) modeling was prepared by RUST as requested by CDPHE. HELP modeling was used for the leachatc source analysis while MULTIMED modeling was used for the subsurface transport analysis. Results of the additional HEI.P and MULTIMED modeling conclude that the alternative final rover design is sufficient in preventing percolation of Iraeh:ur through the homun liner and 11O leachate con(amivants ,hove the Maximum • • Letter Stephen Landman March 13, 1997 Page 2 Containment Levels (MCLs) reach the relevant Point of Compliance (POC). Accordingly, the alternative final cover design exceeds the Colorado Solid Waste Regulations performance standards concerning leachate constituent concentrations in groundwater at the POC. NWSL believes that sufficient technical documentation has been provided to satisfy the criteria specified in Section 1.5.2 A, B C, and D for CDPHE in consultation with the local governing body having jurisdiction to approve the above modification. Upon receiving approval from CDPHE and Weld County Health Department (WCHD), we will revise the following documents which were prepared by RUST and submitted to CDPHE and WCHD on February 27, 1996 to reflect this modification: Updated Design and Operations Plan North Weld Sanitary Landfill Ault, Colorado Dated January 1996 Site Development Plan for Waste Management Disposal Services of Colorado, Inc. North Weld Sanitary Landfill Weld County, Colorado, Dated January 1996 If you have any questions regarding the enclosed RUST report, or would like to meet to further discuss our request for an alternative final cover design, please contact us at (970) 686- 2800. Sincerely, £J dAk �a Bill Hedberg Division V.P. Landfill Operations Environmental Specialist AS/as Enclosure cc: Gloria DunnraWODPS-•w/ii7,ent?. Mike'Heinstein, RUST, w/o enc. Alan Scheere North Weld Sanitary Landfill 40,000 WCR 25 Ault. Colorado 80610 ¶t70/686-2800 • Fax: 970/686-1031 January 22, 1997 Stephen Laudeman Colorado Department of Public Health and Environment Hazardous Material and Waste Management Division HMWMD-SWIM-B2 MD -SWIM -B2 4300 Cherry Creek Drive South Denver, CO 80222-1530 Trevor Jiricek Weld County Department of Health 1517 16th Avenue Court Greeley, CO 80631 SUBJECT: NORTH WELD SANITARY LANDFILL (NWSL) PHASE 1 MODULE 3 LETTER REPORT SUMMARY Dear Mr. Laudeman and Mr. Jiricek: A Waste Management Company Weld County Planning Dept. JAN 2 7 1997 Enclosed for your review and approval is a copy of the Phase I Module 3 letter report summary, prepared by Golder Construction Services, Inc. (GCS) dated January 21, 1997. This summary documents the following activities: • Removal of the three foot clay block • Removal of the Module 2 temporary leachate collection sump; • Restoration of the leachate collection system between Modules 2 and 3; and • Completion of the sand drainage layer within the liner tie-in area. Please insert this summary into Appendix H of the previously submitted document titled "Final Report Construction Quality Assurance Monitoring and Testing Results For Phase I - Module 3 Construction, North Weld Sanitary Landfill, Weld County Colorado" prepared by GCS, dated October 1996. Should you have any questions concerning this letter report summary, please feel free to contact Alan Scheere - WMDSC Project Manager (970) 686-2800, Ron Uhle - GCS Project Manager (303) 980-0540 or Bill Hedberg - WMDSC Division V.P. Landfill Operations at (970) 686-2800. Sincerely Ohm cciwa Bill Hedberg Alan Scheele Division V.P.- Landfill Operations Environmental Specialist AS\as cc. Dave Riecken, Ames, wio cite. Ron Uhlc, Golder, w/o cne. I Hello