HomeMy WebLinkAbout20073883.tiff $ -
Weld County Planning Department
MMitGREELEY OFFICE
,h„�TE, ,Ga,E,r DEC 1 ,2007 WASTE MANAGEMENT
Weste ECEIVE® 7780 East96lndusuihal SalesOffice
If3�S 7780 East 96th Avenue
Henderson,Colorado 80640
1 (800)WMDisposal
December 13,2007 (303)280-9848 Fax
Ms. Marley Shoaf
Colorado Department of Public Health and Environment
Stationary Sources Program
Air Pollution Control Division(APCD-SS-B1)
4300 Cherry Creek Drive South
Denver, CO 80246-1530
CERTIFIED MAIL
7006 0810 0003 0676 0457
RE: ANNUAL NMOC EMISSION RATE REPORT
NORTH WELD LANDFILL
Dear Ms. Shoaf,
As required under the State Emissions Guideline Program for Municipal Solid Waste Landfills,
attached is the completed Annual NMOC Emission Rate Report for 2007 for the North Weld
Landfill (NWLF) located at 40,000 Weld County Road 25 in Ault, Colorado.
Should you have any questions regarding the information contained in this report, please contact
me at 720.977.2107 or Bill Hedberg at 970.686.2800 ext.23.
Respectfully Yours,
fdeM
Alan Scheere
Environmental Specialist
Attachment
cc: Deborah Blandin, WCDPHE
Doug Ikenberry, CDPHE
Kim Ogle, WCDPS
•
2d0I 3883
D:\NWLF\NMOC Report 2007 NWLF.doc -
F: 1.4(2007) 119Loin
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2007 TIER 2 NMOC EMISSION RATE REPORT
NORTH WELD LANDFILL
Because the site does not have scales, volume of waste accepted is estimated based on container size
of incoming waste. Therefore,the equation found in 40 CFR 60.754(a)(ii)was used to determine NMOC
emission rates for the Annual Tier 1 NMOC Emission Rate Report.
MNMOC=2LOR(e kc-e t)(CNMOC)(3.6 x 10-9)
NMOC Emission Rate-20061
MNMoc = Mass methane generation potential, M'/Mg
Lo = Refuse methane generation potential, m3/Mg = 170.00 Note 2
R = Average annual acceptance rate, Mg/yr = 74,574.69
k = Methane generation rate constant, 1/yr = 0.02
c = Years since closure,yrs = 0.00
(c= 0 for active and/or new landfills)
= Age of landfill, yrs = 15.66
CNMoc = Concentration of NMOC, ppm as hexane = 753.69 Note 2
Conversion factor = 3.6 x 10"9
MNMoc=2(170)(74,574.69)(e-(ao21to)-e(0.021116.661)(763.69)(3.6 x 10"9) = 18.50 Mg/yr
1 Information used to determine annual average acceptance rate
The average annual acceptance rate(R)is based on waste in place as of 10/31/07 divided by 15.66 years
(age of site at time of volume measurement)less inert material3. Waste in place is tracked monthly on the
North Weld Sanitary Landfill Title V Log by compiling monthly waste received and subtracting
inert material volumes.
Waste in place(Mg)thru 10/31/07 3,242,811.00
Waste in place less inert and soil(Mg) 1,167,839.70
Percent inert 0.64
Age of site at volume measurement 15.66
Annual average acceptance rate(Mg/yr) 74,574.69
2 For regulatory purposes,the EPA default values for Lo and CNMoc must be used to calculate Tier 1 NMOC
emission rates unless actual values have been obtained during Tier 2 sampling. NWLF conducted Tier 2
site specific sampling for CNN=in 2003(using Method 25C)with a resulting concentration of 753.69 ppmV
as hexane.
3 Inert material includes inert wastes that are disposed in the landfill as well as intermediate and final cover
soil used as part of routine landfill cell development.
NOTE: These calculations are made for NSPS purposes only. EPA has specifically stated as follows:"It is recommended that these default values not
be used for estimating landfill emissions for purposes other than NSPS and EG" (61 FR 9905,9912,March 12,1996).
Consequently,these emissions calculations grossly overestimate actual and potential emissions and reviewers of this document am specifically
cautioned against Improper and Irresponsible uses of these calculations.
C:WiKNWLFINWLF NMOC Tier 2
Reporls.xls
Worksheet:NMOC 2007
Weld County Planning Department
IMnie
GREELEY OFFICE
y
WASTE MANAGEMENT DEC
1 ®p 2007 WASTE MANAGEMENT
r West Industrial Sales Office
7780 East 96th Avenue
December 12,2007 RECEIVED H n de son,Colorado 80640
I (800)WMDisposal
Mr. Douglas Ikenberry,P.E. (303)280-9848 Fax
Colorado Department of Public Health and Environment
Hazardous Materials and Waste Management Division
HMWMD-SWIM-B2
4300 Cherry Creek Drive South
Denver, CO 80246-1530
Ms. Deborah Blandin,M.S.E.H.
Weld County Department of Public Health and Environment
1555 N. 17th Avenue
Greeley, CO 80631
SUBJECT: NORTH WELD LANDFILL
FOURTH QUARTER 2007 GAS MONITORING REPORT
Dear Mr.Ikenberry and Ms. Blandin:
Enclosed for your information is the Fourth Quarter 2007, Gas Monitoring Report for North Weld
Landfill (NWLF). The gas monitoring and corresponding report was completed by Waste
Management Disposal Services of Colorado, Inc. The gas report contains monitoring results from
the Phase 1 and 2 perimeter soil gas probes (GP) GP-6, GP-7, GP-10 through GP-20, and structure
probes GP-1 and GP-2 and inside the shop and office.
The gas monitoring report indicates that combustible gas was not detected in any perimeter probes
or on-site structures above regulatory limits.
If you have any questions regarding this report, please call Alan Scheere at (720) 977-2107 or Bill
Hedberg at(970) 686-2800.
Sincerely,
Alan Scheere
Environmental Specialist
(.cc: Kim Ogle,WCDPS,.w/o enc.:
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F: nwsl 4.2.5.07
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Weld County
planningELEY Department
Nov 2a 2007
WASTE MANAGEMENT RECEIVED
WASTE MANAGEMENT
West Industrial Sales Office
November 21,2007 7780 East 96th Avenue
Henderson,-Colorado 80640
1 (800)WMDisposal
Mr.Nathan Moore (303)280-9848 Fax
Colorado Department of Public Health and Environment
Water Quality Control Division,WQCD-P-B2
4300 Cherry Creek Drive South
Denver, CO 80246-1530
SUBJECT: NORTH WELD LANDFILL(NWLF)
2007 STORMWATER ANNUAL REPORT
FACILITY CERTIFICATION NO.-020237
CERTIFIED MAIL
7006 0810 0003 0676 0426
Dear Mr. Moore:
Pursuant to Part I, Section F(1)of the above Colorado Stormwater Discharge Permit,this annual report
is hereby submitted for your information. The report covers the period from October 1,2006 through
September 30,2007.
During this reporting period NWLF obtained two stormwater samples.The first sample was obtained on
May 29, 2007.Although the total precipitation of this event was 0.5 inches,the majority of this came
within approximately 30 minutes around the time of the sampling event. Consequently,the analytical
results reflected the intensity of this segment of the storm and showed total suspended solids(TSS)of
9,200 mg/1.NWLF evaluated existing stormwater control practices and consulted with the Weld County
Department of Public Health and Environment(WCDPHE) on this matter.
Accordingly,the stormwater detention and yard area was re-graded and additional rock placed along the
flow path.NWLF modified the configuration of the hay/straw bales and placed straw waddles along the
flow path per the recommendation of the WCDPHE.NWLF collected another stormwater sample on
September 24,2007 in an effort to evaluate control measures installed at the facility.The analytical results
showed TSS of 5,200 mg/1.Although this is a 43.5%reduction in TSS from the prior sampling event,
NWLF will continue to evaluate stormwater control measures and implement best management practices as
necessary to continue to improve storm water quality.
If additional information is required regarding this report,please contact Alan Scheere, at 720.977.2107
or Bill Hedberg, Sr. District Manager at 970.686.2800.
Sin erely, LAG(
an Scheere
Environmental Specialist
Enclosure
CM4iMOS\Region\Colorado\NWLFAnnuaI Report Cover 2007
F:NWLF 4.11.1
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O hinted on 100%pontansumer recycled paper. 0SE895
a
Letter Nathan Moore
November 21,2007
Page 2
cc:
Deborah Blandin, WCDPHE
Doug Ikenberry,CDPHE
pjIcim`Og1e;*CDP.S'i
C:Nr1EMOS\Region\Agerc5\Colorado\NWLFAmual Report Cow 2005
F:NWLF 4.11.1
ERRATA - FOR INTERIM UPDATES
NORTH WELD LANDFILL
STORMWATER MANAGEMENT PLAN
DATE DESCRIPTION OF CHANGE
November 2002 • Updated forms to be easier to complete (no changes in
content);
• Took out references to 'special waste' as this term is no longer
recognized by CDPHE;
• Changed all references of CDH to CDPHE;
• Updated SWMP Administrators (Section 3.0 and Appendix C);
• Updated Appendix D; petroleum storage.
• Removed 'Compliance Certification Form' and all references to
same, as this is not required by the permit.
April 2007 • Updated format of plan to better reflect permit layout;
• Updated SWMP Administrators (Section 3.0 and Appendix C);
• General text update including updating reference to permit
expiration date on title page.
North Weld Landfill i Revised April2007
Stormwater Management Plan
I,
s
STORMWATER ANNUAL REPORT -HEAVY INDUSTRY
and Discharge Monitoring Report
COLORADO DEPT. OF PUBLIC HEALTH & ENVIRONMENT
Water Quality Control Division
WQCD-PE-B2
4300 Cherry Creek Drive South
Denver, Colorado 80222-1530
Make enough copies of form for each reporting year. .Check box if this is a
new name, address, etc.
Permittee (Company Name): Waste Management Disposal Services of Colorado, Inc. ❑
Facility Name: North Weld Landfill (NWLF) ❑
Mailing Address: 5500 South Quebec St. Suite 250, Greenwood Village, CO 80111
Facility Phone Number: (970) 686-2800 ❑
Permit Certification No. COR-02 0 2 3 7 O
Reporting Period (check one): n Oct. 1, 2002 to Sept. 30, 2003 -or-
n Oct. 1, 2003 to Sept. 30, 2004
(Report is due by n Oct. 1, 2004 to Sept. 30, 2005
November 28 of each year) n Oct. 1, 2005 to Sept. 30, 2006
M Oct. 1, 2006 to Sept. 30, 2007
** Each section must be completed. Please print or type.**
A. A report on the facility's overall compliance with the SWMP. (Include here a summary of any
measures taken to comply with your stormwater Management Plan (SWMP), to fully implement it,
changes or improvements made in any of your Best Management Practices (BMPs), employee training,
spills, other problems encountered, etc. How is your plan working?)
Overall Compliance: The North Weld Landfill continued to be in compliance with the facility
SWMP during this reporting period. The facility SWMP was updated and submitted to the
Colorado Department of Public Health and Environment on April 26, 2007.The facility
completed employee training during this period including SWMP, Emergency Management Plan,
Spill Prevention and Countermeasure Plan including procedures for managing and
reporting a spill should a spill or release have the potential to impact stormwater;
waste identification and handling procedures and various other topics related
to facility operations and health and safety.
Were changes made to your SWMP? n NoZ Yes - Describe changes on a separate sheet.
See attached Errata-For Interim Updates.
Use additional pages as needed. Page 1 of 3 C:lSueyWlemosRegion\Agency\ColoradoNNWLn2003 NWLF SWrpt.doc
STORMWATER ANNUAL REPORT -HEAVY INDUSTRY
Permit Cert. No. COR-02 0 2 3 7
B. A summary of each comprehensive stormwater facility inspection made, including date, findings, and
action taken. (The permit requires at least two comprehensive facility inspections per year - see page 8 of the
permit. Include here a summary of those inspections, plus any other comprehensive inspections made. It is not
necessary to summarize day-to-day inspections, unless significant problems were noted.)
First Inspection - Date 03/ 28/ 07 Findings, and action taken:
Results of the inspection showed that the facility was in compliance with the SWMP.
Second Inspection- Date 09/ 19/ 07 Findings, and action taken: Results of the
inspection showed that the facility was in compliance with the SWMP. During this period
the stormwater detention and yard area was graded and additional rock placed along the
flow path. NWLF modified the configuration of the hay/straw bales and placed straw waddles
along the flow path per the recommendation of the Weld County Department of Public
Health and Environment (WCDPHE) to improve water quality.
Third Inspection- Date Findings, and action taken:
Other Inspection - Date / / Findings, and action taken:
C. Discharge Monitoring Report- Sampling Results
Sampling point number, description (for additional sampling points, copy tables below as needed):
A stormwater discharge sample was collected on May 29, 2007 and another sample
collected on September 24, 2007 from the facility's designated discharge point.
SAMPLE DATE
PARAMETER UNITS RESULT TAKEN
Oil and Grease mg/1 ND 5/29/07
PH std. limits 8.8 5/29/07
Total Suspended Solids mg/1 9,200 5/29/07
Others: (list) Chemical Oxygen Demand mg/1 45 5/29/07
Use additional pages as needed. Page 2 of 3 C:lSrac lMemos\Region\Agency\Colorado\NWIF2003 NWLF SW,pidac
.
STORMWATER ANNUAL REPORT -HEAVY INDUSTRY
Permit Cert. No. COR-02 0 2 3 7
SAMPLE DATE
PARAMETER UNITS RESULT TAKEN
Total Suspended Solids mg/1 5,200 9/24/07
D. Additional Information on Storm Event
STORM
INFORMATION ITEM (see page 14 of the Heavy Ind. Permit) UNITS EVENT
1. Date of storm event sampled __ 5/29/07
2. Duration of Event sampled hours 1.5
3. Estimate of rainfall of storm event which generated the sampled runoff inches 0.5
4. Time between the storm event sampled and the previous measurable days 24
(greater than 0.1 inch rainfall) storm event
5. Estimate of the size of the drainage area square feet 152,460
6. Estimate of the runoff coefficient of the drainage area percent .40
7. Estimate of the total volume of the discharge sampled gallons
18,246
E. Certification
"I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering, the information submitted is, to the best of my knowledge and
belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment for knowing violations."
I/4007
Signature of Permittee (legally responsible person) Dat Sign d
Tom Buchholz Director of Landfill Operations
Name (printed) Title
Use additional pages as needed. Page 3 of 3 C:Stazy\Memos\Region Agency\Coloredo\NWLF12003 NWLF SWrptdm
& W' 111D
EarthTech 5575 DTC Parkway P 303.694.6660
tt-- - - Suite 200 F 303.694.4410
Atgcn International Ltd.Company Englewood,CO 80111-3016 earthtech.com
November 1,2007
Mr. Douklas Ikenberry, P.E. Weld County Planning Department
Colorado Department of Public Health and Environment GREELEY OFFICE
Hazardous Materials and Waste Management Division
HMWMD-SWIM-B2 NOV 0 2 2007
4300 Cherry Creek Drive South
Denver, Colorado 80246-1530 RECEIVE®
Ms. Deborah Blandin, M.S.E.H.
Weld County Department of Public Health and Environment
1555 N. 17th Avenue
Greeley, Colorado 80631
Re: North Weld Landfill
Second Semi-Annual 2007 Groundwater Sampling Report
Project No. 99150.0601
Dear Mr. Ikenberry and Ms. Blandin:
Enclosed for your review is the Second Semi-Annual 2007 Groundwater Sampling Report for the
North Weld Landfill (NWLF). This report was prepared on behalf of Waste Management Disposal
Services of Colorado, Inc. by Earth Tech, Inc. (Earth Tech). Sampling for the event occurred on
September 27, 2007. Samples were submitted to Severn Trent Laboratories, Inc. for laboratory
analyses. Also enclosed is a 3.5-inch disk,which contains the analytical results for the second semi-
annual 2007 sampling event as requested by the Colorado Department of Public Health and
Environment.
This was the twenty-third detection-sampling event for these wells and there were no volatile organic
compound detections during this event.
Statistical analyses were performed using Intra-well Combined Shewart-CUSUM Control Charts for
wells MW03, MW04, MW05,MW10, and MW12. The enclosed results of the statistical analysis
are displayed in tabular and graphical format. The background period for the control charts currently
includes data through June 2006, and CUSUM is currently calculated starting at the end of the
background period.
The statistical evaluation performed as part of the first 2007 event did show an initial control limit
exceedance for the detection of total organic carbon(TOC)in well MW04. TOC was detected at 2.3
milligrams per liter(mg/L)relative to a control limit of 1.6 mg/L. During this sampling event,TOC
was not detected above reporting limits at MW04. The initial statistical exceedance for TOC from
the first 2007 sampling event was not confirmed.
--Sr EarthTech
A'tijac International Ltd.Company
Mr. Douglas Ikenberry
Ms. Deborah Blandin
November 1,2007
Page 2
There were no control limit exceedances in any downgradient wells during the second 2007 sampling
event's statistical analysis. Upgradient well MW03 did show a control limit exceedance for sulfate.
Sulfate was detected at 1,100 mg/L relative to a control limit of 1,095 mg/L. However,since MW03
is an upgradient well, it is not subject to verification sampling.
Should you have any questions concerning this report, please call me at(303) 694-6660.
Very truly yours,
Earth
Randy Thompson, .
Environmental Engineer
Enclosures
cc Alan Scheere, WMI
Bill Hedberg,NWLF
Kim Ogle, WCDPS w/o encl.
work\99I 50\product\nwsl\2nd07semidoc
asp- Fib
Weld County Planning Department
GREELEY OFFICE
it.
OCT 2`'fl 2007
WASTE MANAGEMENTWASTE MANAGEMENT
RECEIVED 5500 South Quebec St.,Suite 250
Greenwood Village,CO 80111
October 25, 2007 (303)797.1600
(303)486.6146 Fax
•
Ms. Marley Shoaf
Colorado Department of Public Health and Environment
Air Pollution Control Division
Stationary Sources Program
APCDSS-B1
4300 Cherry Creek Drive South
Denver, CO 80246-1530
•
CERTIFIED MAIL
7001 2510 0004 4548 8624
SUBJECT: NORTH WELD SANITARY LANDFILL
TITLE V OPERATING PERMIT SEMI-ANNUAL MONITORING REPORTS
Dear Ms.Shoaf:
In accordance with the North Weld Sanitary Landfill Title V Operating Permit#97OPWE781 are the
following semi-annual Monitoring and Deviation Reports:
• Monitoring and Deviation Reports, Parts I
• Monitoring and Permit Deviation Report—Part III—Report Certification
Part II of the Monitoring and Permit Deviation Reports was not completed because there were no
permit deviations or upset or emergency conditions that occurred during this reporting period.
These reports cover the monitoring period April 1, 2007 through September 30, 2007. The
submittal deadline for these reports is November 1,2007.
Should you have any questions regarding these reports, please contact Alan Scheere at(720)977-
2107, Bill Hedberg at (970)686-2800,or me at 303.944.7519.
Respectfully Yours,
- 141 E ��`_
Stacy E.Anderson
Compliance/Technical Manager
/attachments
cc: Doug Ikenberry,CDPHE, w/enc.
Troy Swain,WCDPHE,w/enc.
CISim_Ogle 1NCDPS. /o enc y
CaStacVUir\NWLF.1NWLF NIPOR 1007 Crner.doc
F Operating Record, I 1
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®Rmne un IJOti po+r.ron.ame,.xrn4d papa.
(it DEPARTMENT OF PUBLIC HEALTH & ENVIRONMENT
1555 N. 17`h Avenue
Greeley, CO 80631
WEBSITE: www.co.weld.co.us
Ip ADMINISTRATION: (970) 304-6410
FAX: (970) 304-6412
PUBLIC HEALTH EDUCATION & NURSING: (970) 304-6420
O FAX:(970) 3046416
ENVIRONMENTAL HEALTH SERVICES: (970) 304-6415
COLORADO FAX: (970) 304-6411
October 23, 2007
Alan Scheere Bill Hedberg
Waste Management North Weld Landfill
7780 E. 96th Avenue 40000 Weld County Road 25
Henderson, CO 80640 Ault, CO 80610
Subject: North Weld Landfill=4`h Quarter Inspection,2007
Dear Mr. Scheere and Mr. Hedberg:
On October 16, 2007, the Weld County Dept. of Public Health & Environment conducted a routine
inspection of the North Weld Landfill, located at 40000 Weld County Road 25 west of Ault in Weld
County, Colorado. The purpose of the inspection was to assess the facility's compliance with the
following: (1) "Regulations Pertaining to Solid Waste.Disposal Sites and Facilities" as promulgated by
the Solid Waste Disposal Sites and Facilities Act, Title 30, Article 20, part 1, C.R.S., as amended, (2)
Development Standards set forth in the facility's Use by Special Review Permit Number 895 (USR-®
(895);and(3) the Weld County Code.
Based on the inspection, the facility was in compliance. A copy of the inspection checklist is attached.
If you have any questions regarding this inspection, please contact me at 304-6415, extension 2216.
Sincerely,
Deborah Blandin
Environmental Health Manager
Environmental Health Services
cc: Trevor Jiricek, Director, Weld County Environmental Health Services (via e-mail)
Doug Ikenberry, Colorado Department of Public Health and Environment
Bruce Barker,Weld County Attorney(via e-mail)
Kim Ogle,Weld County Department of Planning Services (via e-mail)
riee't6 DEPARTMENT OF PUBLIC HEALTH & ENVIRONMENT
1555 N. 17th Avenue
Greeley, CO 80631
WEBSITE: www.co.weld.co.us
I ADMINISTRATION: (970) 304-6410
D FAX: (970) 304-6412
C PUBLIC HEALTH EDUCATION & NURSING: (970) 304-6420
O . FAX: (970) 304-6416
ENVIRONMENTAL HEALTH SERVICES: (970) 304-6415
COLORADO FAX: (970) 3046411
August 27, 2007
Alan Scheere Bill Hedberg
Waste Management North Weld Landfill
7780 E. 96th Avenue 40000 Weld County Road 25
Henderson, CO 80640 Ault, CO 80610
Subject: North Weld Landfill—3`a Quarter Inspection, 2007
Dear Mr. Scheere and Mr. Hedberg:
On August 13, 2007, the Weld County Dept. of Public Health & Environment conducted a routine
inspection of the North Weld Landfill, located at 40000 Weld County Road 25 west of Ault in Weld
County, Colorado. The purpose of the inspection was to assess the facility's compliance with the
following: (1) "Regulations Pertaining to Solid Waste Disposal Sites and Facilities" as promulgated by
the Solid Waste Disposal Sites and Facilities Act, Title 30, Article 20, part 1, C.R.S., as amended, (2_)._
Development Standards set forth in the facility's Use by Special Review Permit Number 895 CS"
cer895,, and(3) the Weld County Code.
Based on the inspection, the facility was in compliance. A copy of the inspection checklist is attached.
If you have any questions regarding this inspection, please contact me at 304-6415, extension 2216.
Sincerely,
Deborah Blandin
Environmental Health Manager
Environmental Health Services
cc: Trevor Jiricek, Director, Weld County Environmental Health Services (via e-mail)
Doug Ikenberry, Colorado Department of Public Health and Environment
Bruce Barker, Weld County Attorney(via e-mail)
Kim Ogle, Weld County Department of Planning Services (via e-mail)
y
inMit WASTE ® WASTE MANAGEMENT
Midwest Industrial Sales Office..
7780 E.96th Ave.
May 30, 2007 Henderson,CO 80640
(303)336-3900
(303)280-9848 Fax
Mr. Douglas Ikenberry, P.E.
Colorado Department of Public Health and Environment
Hazardous Materials and Waste Management Division
HMWMD-SWIM-B2
4300 Cherry Creek Drive South
Denver, Co 80246-1530
Mr. Troy Swain
Weld County Department
of Public Health and Environment
1555 N. 17th Avenue
Greeley, Co 80631
Subject: North Weld Landfill (NWLF)
2007 Groundwater Monitoring Plan Update
•
Dear Mr. Ikenberry and Mr. Swain: -
Enclosed is an updated text and corresponding pages to the Groundwater Monitoring Plan for
NWLF. This plan was updated pursuant to Development Standard #8 of the Weld County
Certificate of Designation. This Development Standard requires the plan to be reviewed at
least once every two years. The NWLF Groundwater Monitoring Plan was previously
reviewed, updated and submitted to the Colorado Department of Public Health and
Environment (CDPHE) and Weld County Department of Public Health and Environment
(WCDPHE) on May 25, 2005.
The NWLF Groundwater Monitoring Plan was reviewed and modified by NWLF and only
minor plan updates/revisions were required since the previous plan submittal. These plan
updates/revisions are described below:
1. Changed the front cover page of the Updated Groundwater Monitoring Plan to reflect
the plan update;
2. Updated the Revision Summary page to document the plan updates;
3. General Text Edits
• Changed the well designation of MW9 to MW-9 in Section 1.4.2 for consistency;
c:\data\letter\nwsl\upgrwpin2007
File:4.1.6
From everyday collection to environmental protection, Think Green?' Think Waste Management.
vCL- 815
Letter Douglas Ikenberry and Troy Swain
May 30,2007
Page 2
• Updated the information in Section 5.1.2 to include low flow or minimal drawdown
purging as an alternative method employed at the site.
• Updated the information in Appendix 4 (Directory).
Please replace the existing information, which has been revised as described above, with the
enclosed text and corresponding pages.
If you have any questions concerning these revisions, please contact either of us (720- 977-
2107 for Alan Scheere or 970- 686-2800 ext. 23 for Bill Hedberg).
Sincerely,
EY(
Alan Scheere Bill Hedberg
Environmental Specialist District Manager
Enclosure
AS/as
' cc: zKim_Ogle WCDPS;w/o.=erica
Randy Thompson, EarthTech, w/enc.
c:\data\letter\nwsl\upgrwpin2007
File:4.1.6
Weld County Planning Department
GREELEY OFFICE
MAY 0 1VV �pp�yyAA
2000�7
• aulait ENT
WASTE MANAGEMENT
• Midwest Industrial Sales Office
7780 E.96th Ave.
April 26,2007 Henderson,CO 80640 •
(303)336-3900
(303)280-9848 Fax
•
Ms.Kathryn Dolan
Colorado Department of Public Health and Environment
Water Quality Control Division
4300 Cherry Creek Drive South
Denver, Co 80246-1530
Subject: North Weld Landfill(NWLF)
Updated Stormwater Management Plan
Permit No. COR-020000
Facility No. COR-020237
Dear Ms.Dolan:
In accordance with Part I(B)(B)of the above referenced permit re-issued January 22,2007,NWLF is
submitting the enclosed updated Stormwater Management Plan for NWLF.Accordingly,I hereby make
the following certification:
"I certify under penalty of law that this document and all attachments were prepared under my direction
or supervision in accordance with a system designed to assure that qualified personnel properly gather
and evaluate the information submitted. Based on my inquiry of the person or persons who manage the
system,or those persons directly responsible for gathering the information,the information submitted is,
to the best of my knowledge and belief,true,accurate and complete.I am aware that there are significant
penalties for submitting false information,including the possibility of fine and imprisonment for knowing
violations."
Should you have any questions regarding this plan,please contact me at 1-970-686-2800 or Alan Scheere
at 720.977.2107.
Sincerely,
Bill Hedberg -
Sr.District Manager
cc: Douglas Ikenberry, CDPHE
Troy Swain, WCDPHE
Kim Ogle,Weld County Planning
Alan Scheere,WM
Stacy Anderson, WM
Len Butler,WM
Tom Buchholz,WM
c:\data\letteI\NWLF
File: 11.0
From everyday collection to environmental protection, Think Green:" Think Waste Management.
Weld County Planning Department
VIMA. GREELEY OFFICE
WASTE WASTE MANAGEMENT
MANAGEMENT
APR 2-3 2007 5500 South Quebec Street
Suite 250
RECEIVED Greenwood Village,CO 80111
I (303)797-1600
April 19, 2007
Ms. Cindy Beeler, Environmental Engineer
Office of Enforcement, Compliance and Environmental Justice
Mail Code 8 ENF-T
U.S. Environmental Protection Agency, Region VIII
1595 Wynkoop Street
Denver, CO 80202-1129
CERTIFIED MAIL
7006 2150 0004 4548 8686
SUBJECT: NORTH WELD LANDFILL
TITLE V OPERATING PERMIT NUMBER 97OPWE181
2006/2007 ANNUAL COMPLIANCE CERTIFICATION REPORTS
•
Dear Ms. Beeler:
Enclosed is the 2007 Annual Compliance Certification Report, which covers the period
April 1, 2006 through March 31, 2007. In addition, we have enclosed an Annual
Compliance Certification Report that covers the period March 1, 2006 through April 30,
2006. This additional annual report was requested by the Colorado Department of Public
Health and Environment to cover the time frame between the previous permit to the
effective date (May 1, 2006) of the renewed Title V Operating Permit for NWLF.
Should you have any questions regarding this report, please contact me at 303.944 7519,
Bill Hedberg at(970) 686-2800, or Alan Scheere at (720) 977-2107.
Respectfully Yours,
Stacy El. Anderson
Compliance Manager
/attachment
cc: Doug Ikenberry, CDPHE, w/enc.
Troy Swain, WCDPHE, w/enc.
iin3 Og of CDPS;w/a-enc.--"
Theresa Amoroso, CDPHE;w/enc.
•
C:\AirrNWLF Annual Ccn 0307 EPA Covcr.doe
F:Operating Record 1.4(2007)
From everyday collection to environmental protection, Think Greens Think Waste Management.
7'iri:ed c:i 1UO%R t-m2s::n,;',ery i dW7.'r.
Weld County Planning Department
VIMGREELEY OFFICE
WASTE MANAGCMCN7^ WASTE MAINAGEIWENT
APR 2 3 2007 5500 South Quebec Street
Suite 250
R.E C E I V E® Greenwood Village,CO 80111
(303)797.1600
April 19, 2007
Ms. Theresa Amoroso
Colorado Department of Public Health and Environment
Air Pollution Control Division
APCD-SS-B1
4 300 Cherry Creek Drive South CERTIFIED MAIL
Denver, CO 80246-1530 7006 2150 0004 4548 8716
SUBJECT: NORTH WELD LANDFILL (NWLF)
TITLE V OPERATING PERMIT
ANNUAL COMPLIANCE CERTIFICATION REPORT
2006/2007 SEMI-ANNUAL MONITORING REPORTS
2007 ANNUAL INSPECTION
Dear Ms. Amoroso:
Attached are the following Monitoring and Deviation Reports and Annual Compliance
Certifications for the previous Title V Operating Permit as welt as the renewed Title V
Operating Permit effective May 1, 2006 for NWLF. These revised reports and
certifications are submitted based on your conversation with Alan Scheere on April 9,
2007, further discussed below.
1.) Semi-Annual Monitoring and Deviation reports
Monitoring Periods:
O March 1- April 30 2006
• April 1-September 30, 2006
• October 1 — March 31, 2007
2.) Annual Compliance Certification
Monitoring Periods:
• March 1- April 30, 2006
o April 1, 2006— March 31, 2007
NWLF was issued their first Title V Operating Permit on March 1, 2000. Since that time
NWLF has been.steadfast in submitting routine semi-annual monitoring and deviation
reports and annual certifications to the Colorado Department of Pubic Health and
Environment (CDPHE) on schedule and in a timely manner. When preparing our reports
for the period ending March 31, 2007, we discovered we had inadvertently submitted the
semi-annual monitoring and deviation report submitted September 18, 2006 in
accordance with the previous permit-reporting schedule. Alan Scheere then informed
C:41ir1 NWLF\NW!F Annual Celt 0107 Cover and inspection connnents.doc
F.Operating Ftccord L4 C007i
From everyday collection to environmental protection, Think Green:' Think Waste Management.
®P.wed n lOr.pot;-to -ttyecd p:Tel
Theresa Amoroso
April 19,2007
Page 2
you by phone that we observed that this submittal did not coincide with the renewed
permit schedule and the schedule identified in the CDPHE letter dated April 19, 2006.
However, this submittal did cover the time period between March 1, 2006 and April 30,
2006, as requested in the CDPHE letter dated April 19, 2006. Additionally, NWLF has
been in continuous compliance with all other terms and conditions during and including
the time period for the requested report submittals for the time period between March 1,
2006 through April 30 2006, as specified in the CDPHE letter as well as the time period
for the semi-annual reporting period between April 1-September 30, 2006 and the annual
reporting period between April 1, 2006 through March 31, 2007 specified in the new
operating permit. Pursuant to your phone conversation with Alan Scheere on April 9,
2007, we are resubmitting compliance reports which better match the final period of the
original permit and the new schedule of the renewal permit, as requested.
We understand the importance of timely report submittals and have discussed this issue
with involved personnel and intensely reviewed report submittal schedules. In addition,
internal quality assurance and quality control measures will be enhanced to prevent
reoccurrence. NWLF is committed to compliance and we apologize for any
inconvenience this may have caused the Air Pollution Control Division.
Please note that the mailing address for correspondence related to this permit has
changed. In future, all permit documents should be mailed to:
5500 South Quebec St, Suite 250,
Greenwood Village, CO 80111.
Note also that Torn Buchholz, the Responsible Official, has a new telephone number.
Tom can now be reached at 303.486.6024. Alan Scheere's contact information remains
the same. Should you have any questions regarding these reports, please contact me at
303.944.7519, Bill Hedberg at 970.686-2800, or Alan Scheere at 720.977-2107.
Respectfully Submitted,
Stacy E. nderson
Compliance Manager
/attachments
cc: Doug lkenberry, CDPHE, vv/enc.
Troy Swain, WCDPHE, w/enc.
� A7-Ogle,Vl+'CdP_S, tS enc
C:/Air/NWLFiNWLF Annual Ceri 0407 Cover doc.
F:Operating Record l.4(2007)
wi WASTE MANAGEMENT
5500 South Quebec Street
Suite 250
Greenwood Village, CO 80111
(303) 797-1600
April 6, 2007
Mr. Charles Johnson
Colorado Department of Public Health and Environment
Hazardous Materials and Waste Management Division
4300 Cherry Creek Drive South
Denver, CO 80246-1530
Subject: North Weld Landfill (NWLF)
Revised Closure/Post-Closure Plan and Financial Assurance Plan
Dear Mr. Johnson:
Revised closure/post-closure and financial assurance plans are enclosed. The plans have been updated to
reflect changes in certain closure/post-closure activities and quantities and miscellaneous text changes.
The financial assurance plan includes new closure and post-closure cost estimates, which replace
estimates prepared in 2002. Colorado regulations require that cost estimates be replaced with new
estimates every five years or as otherwise required by the Colorado Department of Public Health and
Environment. Accordingly, the new closure and post-closure cost estimates are in 2007 dollars. A
certificate of insurance in the amount of the new estimates is also provided in the financial assurance
plan.
Copies of the enclosed plans have been placed in the facility operating record.
Please call me at(303)486-6045 or Alan Scheere at (720)977-2107 if you have questions concerning the
enclosures.
Sincerely,
Tom Schweitzer, P.E.
Environmental Engineer
Enclosures
cc: Troy Swain, Weld County Department of Public Health and Environment
Kim Ogle, Weld County Department of Planning Services
Douglas Ikenberry, CDPHE
Bill Hedberg/NWLF Operating Record, (2 copies)
Alan Scheere, Waste Management
Julie Overmyer, Waste Management(w/o encl)
X007-31X-9
(1C7711/ 7141-2 /7L 0777
ce� DiU u512- t5t1 F>1U
I
I
CLOSURE/POST-CLOSURE PLAN
NORTH WELD LANDFILL
Weld County, Colorado
1
Prepared by:
I
1 Waste Management Disposal Services of Colorado, Inc.
North Weld Landfill
40,000 Weld County Road 25
' Ault, Colorado REG/`C,. .ee• UT
., .mot,Psn�ri••,F
;5
Reviewed By: 6, ° 070
G�o� J�e4
Tom Schweitzer, PE '<-',,6'•. ••••°°.:V�
Registered Professional Engit /0NAL tv\*�
State of Colorado
License #24176
1
1
' Revised March 2007
I
1 CLOSURE/POST-CLOSURE PLAN
NORTH WELD LANDFILL
ITABLE OF CONTENTS
I Section Page
1.0 INTRODUCTION 1
I 1.1 PURPOSE 1
1.2 FACILITY INFORMATION 1
2.0 CLOSURE PLAN 2
I2.1 INTRODUCTION 2
2.1.1 Description 2
I 2.1.2 Regulatory Requirements 2
2.2 CLOSURE ACTIVITIES 3
2.3 MAXIMUM EXTENT OF OPERATIONS 4
I 2.4 FINAL COVER 4
2.4.1 Final Grades 4
2.4.2 Final Cover Description 4
I2.5 CONSTRUCTION 5
2.6 CONSTRUCTION QUALITY ASSURANCE (CQA) 5
2.7 CLOSURE SCHEDULE 6
I3.0 POST-CLOSURE PLAN 7
3.1 INTRODUCTION 7
I3.1.1 Description 7
3.1.2 End Use 7
I 3.1.3 Regulatory Requirements 7
3.2 POST-CLOSURE ACTIVITIES 8
3.2.1 Facility Management 8
I3.2.2 Post-Closure Activities 8
ILIST OF FIGURES
Figure
I 1 Site Location Map
2 Closure Area Map
3 Closure Schedule
I
I Closure/Post Closure Plan .. March 2007
North Weld Landfill
I
CLOSURE/POST-CLOSURE PLAN
' NORTH WELD LANDFILL
REVISION LOG
DATE DESCRIPTION OF REVISION BY
4/97 Update Plan originally submitted to CDPHE 10/93, to reflect operational TS/AS
changes
' 3/01 Update Plan to increase estimate of largest area of the landfill ever TS/AS
requiring final cover during the active life
4/03 Update Plan to increase estimate of largest area of the landfill ever TS/AS
1 requiring final cover during the active life
3/05 Update Plan to increase estimate of largest area of the landfill ever TS/AS
requiring final cover during the active life and modify text in Sections 2.4,
2.5 and 2.6 to reflect approval of an alternative final cover design
3/06 Updated Plan to decrease estimate of largest area of the landfill requiring TS/AS
final cover during the active life. Miscellaneous text changes were also
made to the Plan.
3/07 Updated Plan to reflect changes to the corresponding Financial Assurance TS/AS
Plan dated March 2007 specifically replacing cost estimates prepared in
2002 with new cost estimates; updated Plan to adjust estimate of largest
area of the landfill requiring final cover during the active life; update soil
backfill quantities. Miscellaneous text changes were also made to the
Plan.
I
r
r
Closure/Post Closure Plan March 2007
North Weld Landfill
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1.0 INTRODUCTION
1.1 PURPOSE
This revised Closure/Post-Closure Plan(Plan)for the North Weld Landfill (NWLF)updates the
previous plan submitted to the Colorado Department of Public Health and Environment(CDPHE)
dated April 2006. This Plan is updated to reflect the facility's current operational status,which
changes the estimate of the largest area ever requiring final cover during the active life of the site.
' This Plan is also updated to reflect changes associated with the corresponding Financial Assurance
Plan revised March 2007. The Financial Assurance Plan was revised to replace cost estimates
prepared in 2002 with new cost estimates in accordance with Section 1.8.3 of the Regulations
which states"Owners or operators of a site and facility must replace original cost estimates with
new cost estimates every five (5)years unless otherwise required by the Department." The next
replacement of cost estimates is scheduled for 2012. This Plan is to be used in conjunction with the
revised Financial Assurance Plan for NWLF. The new cost estimates calculated in the Financial
Assurance Plan provide for closure and post-closure care activities described in this Plan.
This Plan has been prepared to meet the following objectives:
1. Describe the steps necessary to close the site when the cost of closure would be the
greatest.
2. Describe the activities to be conducted during the post-closure care period.
This plan has been prepared in accordance with the provisions of the Colorado "Regulations
Pertaining to Solid Waste Disposal Sites and Facilities", 6 CCR 1007-2 (Regulations). Sections 2.5
and 3.5 of the Regulations pertain to closure activities and Sections 2.6 and 3.6 pertain to post-
closure activities.
1.2 FACILITY INFORMATION
NWLF is located approximately six miles west of Highway 85, on Colorado Highway 14, in the
southwest quarter of Section 7, Township 7 North, Range 66 West, as shown on Figure 1. The
facility is owned and operated by Waste Management of Colorado (WMC). The site consists of
' 170 acres, 119 of which are permitted for municipal solid waste disposal, and an approximate
disposal capacity of 15 million bank cubic yards. Current operations are in Phase 2, Module 3. The
facility accepts non-hazardous municipal, commercial and industrial solid wastes.
' NWLF will be developed in four phases: 1, 2, 3A and 3B. The site will be closed and monitored as
a single unit. Individual phases will not be closed or monitored separately; therefore, this plan
addresses the site as a whole. However, operational factors occurring during the life of the site may
necessitate closure or monitoring of portions of the site individually.
Closure/Post Closure Plan I March 2007
North Weld Landfill
1
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1
' 2.0 CLOSURE PLAN
2.1 INTRODUCTION
2.1.1 Description
This closure plan describes the steps necessary to close the facility at any point during its
' active life. This plan will be reviewed and updated as needed for changing conditions.
2.1.2 Regulatory Requirements
This closure plan is prepared in accordance with Section 2.5, "Closure of Solid Waste
Disposal Sites and Facilities"and Section 3.5, "Closure"of the Regulations. This plan will
be maintained in the facility operating record.
' The closure requirements call for a closure plan, a description of the closure activities and
the closure certification. The requirements are summarized below:
' Closure Plan
1. Prepare a closure plan for approval by the CDPHE after consultation with the
local governing body having jurisdiction. The plan, at a minimum, must include
' the following:
a. The steps necessary to close the landfill at any point during its active life.
b. A description of the final cover system and the methods and procedures to
be used to install the cover.
c. An estimate of the largest area of the landfill ever requiring a final cover
' during the active life.
d. A schedule for completing closure activities.
2. Maintain a copy of the closure plan in the operating record.
Closure Activities
' 1. Close the site in accordance with the Solid Waste Disposal Sites and Facilities
Act and the Regulations.
2. Sixty(60) days prior to closure notify the CDPHE and the local governing body
in writing that the facility will be closing.
3. Sixty(60) days prior to closure notify the general public of the facility closure
by posting clearly visible signs of suitable size at the site entrance.
Closure/Post Closure Plan 2 March 2007
North Weld Landfill
N
' 4. Enact precautions to prevent further use of the site for unauthorized disposal.
5. Prevent water pollution from occurring at or beyond the point of compliance.
1 6. Prevent nuisance conditions at or beyond the site boundary.
7. Initiate closure activities within thirty(30)days of reaching final design grades
unless an extension is obtained from CDPHE.
8. Complete closure within 180 days after closure initiation, or if necessary, obtain
an extension from the CDPHE.
Closure Certification
1. Following closure, submit a report certified by a Colorado professional engineer
(P.E.)to the CDPHE documenting that closure has been completed in
accordance with the closure plan. Place a copy of the report in the facility
operating record.
2. Following closure,record a notation on the deed or other title instrument stating
that the land was used as a landfill and its use is restricted. Notify the CDPHE
and the local governing authority that the notation has been recorded and place a
copy of the notation in the operating record.
2.2 CLOSURE ACTIVITIES
The following closure activities will be performed when site closure is necessary:
1. Construction Documents—Closure construction plans will be prepared as needed.
2. Regulatory Agency Notification - Sixty(60) days prior to closure of any landfill phase, a
notification of the intent to close will be submitted to the CDPHE and the local governing
' authority and a copy of the notice will be placed in the operating record.
3. Public Notification - Sixty(60) days in advance of closure date, signs will be placed at
entrance to the site notifying the general public of the closure date.
4. Final Cover- Final cover will be placed in accordance with the Regulations. The final
' cover design is discussed in detail in Section 2.3 of this Plan.
5. Completion of Closure- Closure activities will be completed within 180 days following
closure. A request for an extension may be submitted to CDPHE if climatic or operational
factors dictate that additional time is required for proper closure.
' Closure/Post Closure Plan 3 March 2007
North Weld Landfill
U
6. Certification/Documentation - Upon completion of construction, a report will be prepared
by a Colorado P.E. certifying that closure was conducted in accordance with the provisions
of this plan. The report will be submitted to CDPHE for approval after consultation with
the local governing board. The approved report will be placed in the operating record.
To complete closure a notation will be made on the title or deed to the land, which notifies
' prospective buyers that the land was used as a landfill, and that certain land use restrictions
apply. Copies of the notation will be submitted to CDPHE and the local governing body and
a copy will also be placed in the operating record.
7. Security-During closure activities and after closure,public disposal will be prohibited.
Signs will be posted warning of unauthorized entry or waste disposal. The existing fence
1 will be maintained and the front gate will be kept locked when not in use.
2.3 MAXIMUM EXTENT OF OPERATIONS
An estimate of the largest area of the landfill currently requiring final cover is about 52 acres in
Phases 1 and 2 as shown in Figure 2. The estimated closure area is based on the facility's current
disposal activities. During 2005 and 2006 approximately 16 acres of final cover was placed in
' Phase 1 and an additional module (3) was constructed in Phase 2 during 2006. This resulted in
approximately 52 acres in Phases 1 and 2 that currently require final cover.
The estimated closure area is also based on the facility's projected disposal activities over a five
year period. Section 1.8.3(D) of the Regulations requires the closure and post-closure cost
' estimates to be recalculated every five years unless otherwise required by CDPHE. The last
recalculation was performed in 2002. Accordingly, NWLF replaced the 2002 cost estimates with
new cost estimates, which are included in the corresponding Financial Assurance Plan revised
' March 2007. The next replacement of cost estimates is scheduled for 2012.
2.4 FINAL COVER
2.4.1 Final Grades
Final grades have been designed to promote surface water runoff and minimize erosion.
' Final grade slopes are designed to be a minimum of 5 percent (20 to 1) and a maximum of
25 percent (4 to 1), unless alternative grades have been approved by CDPHE.
Prior to placement of final cover, areas of the site that have not been filled to final grades
may require placement of backfill to achieve 5% slopes. About 452,000 cubic yards of on-
site soils are estimated for achieving minimal slopes prior to placement of final cover.
2.4.2 Final Cover Description
' NWLF received approval from CDPHE and Weld County Department of Public Health and
Environment(WCDPHE) for an alternative final cover(AFC) design on March 30, 2004
' Closure/Post Closure Plan 4 March 2007
North Weld Landfill
and September 3, 2004 respectively. Accordingly,the AFC components are described
' below.
' 1. Alternative Final Cover Layer-The AFC layer will consist of a minimum of 18
inches of slightly compacted soil from on-site sources. AFC thickness on the side
slope will be increased to 20 inches in accordance with the AFC design. The AFC
' components should have no less than 15%fines content and be compacted to
between 80%to 90%of maximum density as determined by Standard Proctor
(ASTM D 698). Approximately 140,100 cubic yards of soil will be necessary for
the AFC layer. This conservatively assumes a 20-inch AFC layer will be installed
over the 52-acre area.
2. Alternative Final Cover Topsoil Layer—The 6-inch topsoil layer of the AFC will
have no less than 30% fines content and be compacted to between 80% and 90% of
maximum density as determined by Standard Proctor(ASTM D698). The 6-inch
topsoil layer of the AFC will be material suitable for sustaining vegetation. AFC
seedbed preparation, seed mix and fertilizer requirements are specified in the
approved"North Weld Landfill Alternative Final Cover Demonstration"prepared
' by Golder Associates dated December 30, 2003. Approximately 42,000 cubic yards
of soil will be required for the topsoil layer over the 52-acre area.
2.5 CONSTRUCTION
Construction of the final cover system will be performed by using equipment such as
' scrapers to excavate, haul and place loose soil lifts for the AFC layer. A motor grader, low
ground pressure dozer, or other suitable equipment will be used to spread/shape the cover.
' The topsoil layer will be placed loosely over the AFC layer with scrapers and then shaped
with a motor grader, low ground pressure dozer, or other suitable equipment. The topsoil
layer will then be prepared in accordance with specifications provided in the above
referenced North Weld Landfill Alternative Final Cover Demonstration.
2.6 CONSTRUCTION QUALITY ASSURANCE (CQA)
' To ensure proper implementation of the AFC design the following CQA requirements
apply:
• Performance of grain-size distribution tests every 5,000 cubic yards will be
conducted for the AFC layer and the 0.5 foot topsoil layer;
` • Performance of Standard Proctor tests every 10,000 cubic yards;
• In-situ density testing using a nuclear gauge at a frequency of one test per 1,000
cubic yards;
Closure/Post Closure Plan 5 March 2007
North Weld Landfill
1
1
• Oven-dry moisture contents at a frequency of one test every 1,000 cubic yards;
• Verification of proper thickness of cover at a grid spacing of approximately 100 feet
on-center.
' A design drawing showing the area of AFC to be built and a detail of the cover cross-
section will be supplied to the CDPHE and WCDPHE prior to construction. Also, an as-
built construction drawing will be provided with the certification report that shows the
survey points used to verify thickness on the approximately 100 feet on-center grid pattern.
Upon completion of construction activities, a Colorado P.E. will sign a certification
' document indicating that the final cover was constructed in substantial conformance with
the project specifications and approved closure plan.
' 2.7 CLOSURE SCHEDULE
The schedule for closure is weather dependent. Excessive cold or rainy weather can affect
placement of cover materials. The typical available construction window for placing cover
1 materials in this climate is from late April through late September. A typical closure
schedule is provided in Figure 3.
If necessary, a request for an extension will be submitted to CDPHE to ensure that sufficient
time is available to complete closure in accordance with the provisions of this closure plan.
1
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' Closure/Post Closure Plan 6 March 2007
North Weld Landfill
' 3.0 POST-CLOSURE PLAN
3.1 INTRODUCTION
1 3.1.1 Description
This post-closure plan describes all actions to be taken following closure of the site. Post-
closure care begins after the site is closed in accordance with the closure plan. Post-closure
care continues for a period of 30 years, unless during the life of the facility or the post-
closure period, a demonstration is made to the CDPHE and the local governing body, which
shows that a reduced time period is sufficient to protect human health and the environment.
If the post-closure period is reduced, this plan will be updated accordingly.
3.1.2 End Use
Upon completion of closure, current plans indicate that the site will be zoned for
agricultural use. This end use should have minimal impact on the final cover, and the use
will not interfere with post-closure monitoring.
3.1.3 Regulatory Requirements
1 This post-closure plan is prepared in accordance with Section 2.6 "Post-Closure Care and
Maintenance Standards" and Section 3.6, "Post-Closure Care and Maintenance" of the
' Regulations. This plan will be maintained in the facility operating record.
The regulatory requirements are summarized below:
' Post-Closure Plan
1. Prepare a post-closure plan for approval by CDPHE in consultation with the
local governing body, which includes the provisions to prevent or minimize
nuisance conditions, maintain the final cover, monitor groundwater, maintain
and monitor the leachate collection system, and monitor landfill gas.
2. Describe the planned end use for the site and identify the name and address of a
contact person who is responsible for the facility.
3. Maintain a copy of the post-closure plan in the site's operating record.
1 Post-Closure Activities
1. The post-closure period shall be at least 30 years unless a demonstration is made
' to CDPHE and the local governing body that a shorter time period is sufficient
to protect human health and the environment.
' 2. Permanent surface water structures remaining after closure shall be designed to
manage run-on and run-off from a 100 year, 24-hour storm event.
Closure/Post Closure Plan 7 March 2007
North Weld Landfill
1
1
3. Enact precautions to prevent water pollution at the point of compliance after
' closure.
4. Enact precautions to prevent nuisance conditions at or beyond the site boundary
' after closure.
5. Post-closure monitoring shall be conducted in accordance with the approved
' post-closure monitoring plan.
' 6. At the completion of the post-closure care period, a notification will be
submitted to CDPHE with a certification signed by an independent Colorado
Registered Professional Engineer or approved by the CDPHE and the local
' governing body having jurisdiction verifying that post-closure care has been
completed in accordance with the post-closure plan. The notification will be
placed in the operating record.
3.2 POST-CLOSURE ACTIVITIES
1 3.2.1 Facility Management
During the post-closure period, a facility manager will be named and a phone number and
' address for the manager will be incorporated into this plan. The manager currently
responsible for the facility is:
Mr. William Hedberg
North Weld Sanitary Landfill
40,000 WCR 25
Ault, Colorado
(970) 686-2800
3.2.2 Post-Closure Activities
The following post-closure activities provide for inspection, maintenance, and monitoring
of the design features of the facility during the post-closure period:
1. Inspections - Inspections of the site will be conducted quarterly for the first two
years after closure and semi-annually thereafter. The inspector will assess the
conditions of the site and recommend corrective actions for any items needing
attention. Items to be inspected are further described in the following line items and
include nuisance conditions, the final cover system, groundwater monitoring points,
' leachate monitoring system, gas monitoring system, surface water management
system, and security.
' Closure/Post Closure Plan 8 March 2007
North Weld Landfill
2. Prevent Nuisance Conditions - The placement of final cover provides a barrier
' between the refuse and the environment. Construction of the final cover in
substantial conformance with the project specifications should prevent disease
vectors, deter birds, minimize odors,reduce blowing litter, and minimize air and
' water pollution as direct contact with refuse is prevented. Inspections and continued
maintenance of the final cover system will ensure the integrity of the final cover so
' nuisance conditions are prevented throughout the post-closure period. The potential
for on-site litter,traffic congestion, and noise pollution will be eliminated once the
closure of the facility is complete since refuse will no longer be accepted for
' disposal and heavy equipment will no longer be operating.
3. Final Cover System- The maintenance of the final cover may involve repair of the
' AFC layer, the erosion layer and vegetation. It is estimated that 5% of the site per
year will require cover maintenance, reseeding and fertilizer. An additional 5% is
estimated,which will allow for 10% of the site for the first 2 years of post-closure
' for cover maintenance, reseeding and fertilizer. Additionally, NWLF will conduct a
qualitative vegetation assessment annually for the first 5 years of post-closure and
once every 3 years thereafter to ensure the vegetative cover is established and assist
1 in identifying any areas that may require attention.
4. Groundwater Monitoring - The current groundwater monitoring program consists
' of 5 wells, which will be monitored in accordance with the Site Specific
Groundwater Monitoring Plan(GWMP). Depending on the monitoring analytical
' data obtained during the site operating period, the number of wells and the
monitoring frequency may be reduced during the post-closure care period with
concurrence by CDPHE and the local governing authority. For this plan it is
' estimated that groundwater monitoring will be performed semi-annually.
Samples will be analyzed for the constituents listed in the Groundwater
' Management Plan. The results of all analysis will be placed in the site's operating
record. Monitoring results will be reviewed and a statistical evaluation performed
comparing each event's results to background levels. Detection monitoring will
' continue as long as results remain below specified levels for each constituent. If the
statistical evaluation shows that background levels are exceeded, confirmation
sampling, and if necessary, corrective action will be performed in accordance with
' the GWMP and this plan will be updated as necessary.
In addition to sampling, it is estimated that one well will require repair each year and
' a new pump will be required every five years. The integrity of the monitoring well
system will be inspected during the monitoring events or during the annual site
inspections. Any required repairs will be corrected.
Closure/Post Closure Plan 9 March 2007
North Weld Landfill
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5. Leachate Monitoring- The liquid elevation in the leachate collection sump will be
' monitored semi-annually to verify the levels are 1 ft or less above the base liner.
The measurements will be taken concurrent with semi-annual groundwater
' monitoring or site inspection activities. Leachate samples from the sumps will be
taken annually for analysis, if leachate is present. Although leachate is not
expected during post-closure, in the event that leachate is removed from a sump, it
' will be managed in accordance with the analytical data and approved leachate
management procedures. Information related to the number of gallons removed,
date,time, and location of leachate removal, and the disposal method will be
' maintained in the facility operating record.
During the post-closure period, a demonstration may be made to the CDPHE
' showing that the leachate no longer poses a threat to human health and the
environment and that monitoring can cease.
6. Gas Monitoring- The facility will continue to monitor gas at the site quarterly in
accordance with the Landfill Gas Migration Monitoring Plan (LGMMP). The post-
closure cost estimate assumes the 15 gas monitoring probes (currently in the
program) will be monitored during post-closure. Based on the monitoring data
obtained during the site operating period, the number of probes and the frequency of
monitoring may be reduced during the post-closure care period with concurrence by
CDPHE and the local governing authority.
Results from each gas monitoring event will be placed in the site's operating record.
If monitoring results indicate that methane gas is present above the permissible
regulatory limits, measures will be taken in accordance with Section 2.3.3 of the
' Regulations.
7. Surface Water Management System - Maintenance of the surface water
management system is expected to be required during the post-closure period. This
maintenance consists of regrading or desilting channels and ponds. In addition,
semi-annual inspections of the stormwater system will be performed.
' 8. Waste Disposal - Off-site refuse will not be accepted during the post-closure
period. However, if during post-closure repairs,previously placed refuse is
' excavated for construction activities,the refuse will be placed within the permitted
fill area and final cover will be applied.
' 9. Security- During post-closure, the perimeter fence will remain in place and the
front gate locked when not in use. Signs will be posted warning of unauthorized
entry. The integrity of the fence will be monitored and maintenance performed as
necessary.
Closure/Post Closure Plan 10 March 2007
North Weld Landfill
10. Certification - At the completion of the post-closure care period, a notification
' will be submitted to CDPHE with a certification signed by an independent
Colorado Registered Professional Engineer or approved by the CDPHE and the
local governing body having jurisdiction verifying that post-closure care has been
1
completed in accordance with the post-closure plan. The notification will be
placed in the operating record.
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Closure/Post Closure Plan I I March 2007
North Weld Landfill
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WELD COUNTY, COLORADO
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FINANCIAL ASSURANCE PLAN
1 NORTH WELD LANDFILL
1 Weld County, Colorado
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Prepared by:
1 Waste Management Disposal Services of Colorado, Inc.
North Weld Landfill
40,000 Weld County Road 25
Ault, Colorado
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1 Revised March 2007
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FINANCIAL ASSURANCE PLAN
NORTH WELD LANDFILL
TABLE OF CONTENTS
' Section page
1.0 INTRODUCTION 1
' 2.0 REGULATORY REQUIREMENTS 1
2.1 Cost Estimates 1
2.2 Financial Assurance Activities 1
2.3 Financial Assurance Mechanisms 2
3.0 CLOSURE AND POST-CLOSURE COSTS 2
4.0 FINANCIAL ASSURANCE MECHANISM 2
LIST OF APPENDICES
Appendix
' A Closure Costs
B Post-Closure Care Costs
C Insurance Certificate for Closure and Post-Closure Care Costs
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IFinancial Assurance Plan i March 2007
North Weld Landfill
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FINANCIAL ASSURANCE PLAN
' NORTH WELD LANDFILL
REVISION LOG
DATE DESCRIPTION OF REVISION BY
4/99 Replaced letter of credit with insurance certificate. TS
1 3/01 Revise financial assurance costs based on the revised closure and post- TS/AS
closure plan dated March 2001.
1 5/02 Replace original engineering cost estimates of closure and post-closure TS/AS
based on 2002 CDPHE guidance or determined by NWSL
4/03 Revise financial assurance costs based on the revised closure and post- TS/AS
closure plan dated April 2003.
3/05 Revise financial assurance costs based on the revised closure and post- TS/AS
1 closure plan dated March 2005
3/06 Revised financial assurance costs based on the revised closure and post- TS/AS
1 closure plan dated March 2006.
3/07 Replace cost estimates of closure and post-closure prepared in 2002 with TS/AS
1 new cost estimates in accordance with Section 1.8.3 of the Solid Waste
Regulations. Miscellaneous text changes were also made to the Plan.
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Financial Assurance Plan ii March 2007
North Weld Landfill
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1.0 INTRODUCTION
This revised Financial Assurance Plan (Plan) has been prepared in accordance with Section 1.8 of
the Regulations Pertaining to Solid Waste Disposal Sites and Facilities, 6 CCR 1007-2,
(Regulations), and sets forth the closure and post-closure care costs for North Weld Landfill
(NWLF) in Ault, Colorado. This Plan includes, in Appendix A and B, new estimates of closure
' and post-closure which replace the cost estimates prepared in 2002. The Regulations require that
cost estimates be replaced every five (5) years or as otherwise required by the Colorado
Department of Public Health and Environment (CDPHE). The next replacement of cost estimates
is scheduled for 2012.
This Plan also describes the financial assurance mechanism in place to ensure payment of all
1 associated closure and post-closure costs. This Plan is to be used in conjunction with the
Closure/Post Closure Plan prepared for NWLF dated March 2007.
2.0 REGULATORY REQUIREMENTS
2.1 Cost Estimates
Sections 1.8 of the Regulations list the specific financial assurance requirements for solid waste
disposal sites. These requirements are described below:
' 1. Maintain cost estimates, in current dollars, for hiring a third party to close the largest
area of the facility requiring closure during the active life of the site. The cost estimate
' must also include costs associated with conducting post-closure care.
2. The facility must establish financial assurance sufficient to ensure payment of the
' closure and post-closure care costs.
2.2 Financial Assurance Activities
The following are the requirements for financial assurance activities as described in Section 1.8
of the Regulations:
1. Notify CDPHE when the required cost estimates have been placed in the operating
record;
2. Annually adjust cost estimates to account for inflation using the method prescribed by
CDPHE;
3. Replace original cost estimates with new cost estimates every five (5) years, unless
otherwise required by CDPHE;
' Financial Assurance Plan 1 March 2007
North Weld Landfill
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4. Costs associated with closure, post-closure and corrective actions may be adjusted, after
approval by CDPHE and the local governing authority;
5. Financial assurance must be provided continuously unless a release is granted by
CDPHE.
2.3 Financial Assurance Mechanisms
' Several financial assurance mechanisms are available, and more than one mechanism may be
used. For corporate entities, these mechanisms include a trust fund, letter of credit, surety bond
and insurance.
Waste Management of Colorado, Inc. (WMC) has chosen to use insurance to meet the financial
assurance requirements. The insurance certificate was prepared in accordance with the
requirements set forth in Section 1.8.9 of the Regulations.
3.0 CLOSURE AND POST-CLOSURE COSTS
Closure and post-closure costs are those costs associated with closing the facility and conducting
post-closure care activities. These costs are determined by calculating the cost to complete all of
' the actions in the Closure/Post Closure Plan. The unit cost values for closure and post-closure
activities were determined by WMC. Costs for items including earthwork, excavation and soil
placement, were taken from recent bids for similar work completed at Waste Management
' construction projects.
The new closure costs are provided in Appendix A, and the new post-closure costs are provided in
' Appendix B. The costs are based on 2007 dollars.
4.0 FINANCIAL ASSURANCE MECHANISM
WMC has established insurance coverage to assure adequate funds are available for all closure and
post closure care costs determined in the Closure/Post-Closure Plan. The insurance meets all
' requirements set forth in Section 1.8.9 of the Regulations, "Insurance for Closure and Post-
Closure". The insurance certificate is provided in Appendix C.
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' Financial Assurance Plan 2 March 2007
North Weld Landfill
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1 APPENDIX A
1 CLOSURE COSTS
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TABLE 1 -CLOSURE COST ESTIMATE Date: March-07
Site: NORTH WELD SANITARY LANDFILL Page: 1
I Item Description Units Quantity Unit Cost Extended Category
(Note 1) COSt COSt
1 Foundation Layer •
' a Backfill of intermediate grades to achieve CY 451,364 1.85 835,023
minimum 5%slope (on-site source)
b Other Foundation Layer Closure Costs 0
I Foundation Layer Total Cost 835,023
2 Final Cover Section Closure Area: 52 Acres
a Compacted Clay Layer(on-site source) CY 0
I b Alternative Final Cover(on-site source) CY 140,102 1.85 259,189
c Topsoil (on-site source) CY 42,000 1.85 77,700
d Fertilizer/Soil Amendements/material hauling Acre 52 582.00 30,264
' e Seeding Acre 52 620.00 32,240
f Other Final Cover Closure-Related Costs Acre 0
Final Cover Total Cost 399,393
I 3 Surface Water Controls
a Drainage Swales/Berms/Channels LF 3,400 7.45 25,330
b Culverts 0
' c Sedimentation/Surface Wtr Control Ponds 0
d Erosion Control 0
e Other Surface Water Closure-Related Costs 0
I Surface Water Total Cost 25,330
4 Environmental Monitoring Installations
a Grndwtr Mntg Wells w/dedicated pumps EA 0
b Gas Monitoring Probes EA 0
ll c Other Env. Monitoring Closure Costs 0
Environmental Monitoring Total Cost 0
5 Gas Collection and Control System (GCCS)
I a Extraction Well Installation 0
b Extraction Well -Well Head Assembly 0
c Extraction Well - Lateral Pipe 0
I d GasNapor Collection - Header Pipe 0
e GasNapor Collection - Header Drain 0
f Blower 0
I q Blower Enclosure/Buildinq 0
h Flare 0
i Other GCCS Closure-Related Items 0
' GCCS Total Cost 0
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' TABLE 1 -CLOSURE COST ESTIMATE(Continued) Date: March-07
Site: NORTH WELD SANITARY LANDFILL Page: 2
' Item Description Units Quantity Unit Cost Extended Category
(Note 1) COst Cost
6 Miscellaneous Closure Activities
I a Access Road Construction 0
b Fencing 0
c Signs EA 2 150.00 300
I d Other Miscellaneous Closure-Related Items 0
Miscellaneous Total Cost 300
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CLOSURE COST ESTIMATE SUBTOTAL 1,260,046
Engineering & Project Management
Design & Bid Documents (%of Subtotal) 3% 37,801
I CQA, Surveys & Reports(%of Subtotal) 10% 126,005
Project Mgmt&Admin (% of Subtotal) 2% 25,201
Engineering & Project Mgmt Total Cost 189,007
IContingency (% of Subtotal) 10% 126,005
CLOSURE COST ESTIMATE TOTAL $1,575,058
' Notes:
1 All costs include material and installation unless noted otherwise.
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1 APPENDIX B
POST-CLOSURE CARE COSTS
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' TABLE 2-POST-CLOSURE COST ESTIMATE Date: March-07
Site: NORTH WELD SANITARY LANDFILL Acres at Closure: 67.5
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Unit Quantity Cost per
Item Description Units Quantity Unit Cost per Year Year
1a Facility Inspections& Reporting -2 per year EA _ 1 1,000 2 2,000
lb Facility Inspections & Reporting -2 addt'l Annual cost for 2 addt'l events= 2,000
events to allow for qtrly inspections first Total Item cost for 2-yr period= 4,000
2 yrs of post-closure. Total Item cost annualized over 30-yr Pc period= 133
I 2 Qualitative Vegetative Assessement-annually EA 1 1,500 Varies
for first 5 yrs of post-closure &once every Cost for 5 events(years 1-5)= 7,500
3 years thereafter Cost for 8 events(years 11-30)= 12,000
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Total Item cost annualized over 30-yr PC period= 650
3a Cover Maintenance, Reseeding & Fertilizing - AC 5% 1,803 3.4 6,085
5%of site per year(Note 1)
I 3b Cover Maintenance, Reseeding & Fertilizing - Annual cost for addt'l 5%= 6,085
Total 5% per year to allow for 10%of the l Item cost for 2-yr period= 12,170
site first 2 yrs of post-closure Total Item cost annualized over 30-yr Pc period= 406
4 Surface Water Controls- Maintenance LS 1,000 1 1,000
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5 Fence Repair LS 500 1 500
6 Mowing-Assume annual mowing for first 10 AC 1 20 68
years of post-closure Annual mowing cost= 1,350
Ill Cost for 10 mowing events= 13,500
Total Item cost annualized over 30-yr PC period= 450
7 Groundwater Monitoring - Semi-annual events EA 5 1,111 2 11,110
I 8 Groundwater Well Pump Repair/ Maintenance LS 300 1 300
9 Gas Probe Monitoring, Maintenance and EA 15 92 4 5,520
Reporting -4 Events per Year
10 Leachate Monitoring -Annual EA 2 461 1 922
I 11 Leachate Depth Measurement-Semi-annual EA 2 237 2 948
12 Leachate Management- First 5 years of post- Annual cost for leachate mgmt= 5,000
closure(managed on-site) (Note 2) Total Item cost for 5-yr period= 25,000
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Total Item cost annualized over 30-yr PC period= 833
13 Gas Collection and Control Syst Maint LS 0
14 Gas Condensate Disposal GAL 0
I Subtotal - Items 1 through 14 30,857
Administrative Costs (% of Subtotal) 5% 1,543
Contingency (°/0 of Subtotal) 10% 3,086
I Total Cost per Year 35,486
Post-Closure Care Period: 30 Years
Total Closure Cost $1,064,583
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Notes:
1 Unit cost for Item 3 is based on the Fertilizer, Soil Amendment and Seeding costs of the Closure Cost Estimate(Table 1)increased
by a factor of 1.5 to provide an allowance for cover maintenace in addition to seeding,fertilizer and amendments.
2 Due to arid climate,leachate generation is not expected at closure. However, an annual allowance for leachate management is
tprovided for the first 5 years of post-closure in the event of premature closure.
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APPENDIX C
INSURANCE CERTIFICATE FOR
CLOSURE AND POST-CLOSURE
CARE COSTS
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ANNUAL ADJUSTMENT TO CLOSURE AND POST-CLOSURE COST
ESTIMATES
The NWSL Financial Assuarance Plan as revised March 2007 includes a closure cost estimate of
$1,575,058 (Appendix A) and a post-closure cost estimate of$1,064,583 (Appendix B) for a
combined total estimate of$2,639,641. These estimates are based on the site Closure and Post-
Closure Plan revised March 2007. These estimates are based on 2007 dollars.
The accompanying insurance certificate reflects this adjusted amount.
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I ACORD. CERTIFICATE OF LIABILITY INSURANCE DATES ODNYTY'
PRODUCER THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION
ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE
' NATTCNAL QIARANIY DURANCE 0YFANY CF VERCNT HOLDER.TER THE COVERAGECE DOES NOT AFFORDED BY THE ENDEN ,CE EXTEND O R
100 Bank Street, Suite 610
Burlington, Vermont 05401
' (802) 864-1715 INSURERS AFFORDING COVERAGE NAIC S
INSURED INSURERN NAT OJ,1A. GUARANTY T1S)RAME CCINPANY
Waste Management of Colorado, Inc. INSURERS: (F ARM'
8310 South Valley Highway, Suite 200 INSURER C:
Englewood, Colorado 80112 INSURER D:
I INSURER E:
COVERAGES
ITHE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED TO THE INSURED NAMED ABOVE FOR THE POLICY PERIOD INDICATED.NOTWITHSTANDING
ANY REQUIREMENT.TERM OR CONDITION OF ANY CONTRACT OR OTHER DOCUMENT WITH RESPECT TO WHICH THIS CERTIFICATE MAY BE ISSUED OR
MAY PERTAIN.THE INSURANCE AFFORDED BY NE POLICIES DESCRIBED HEREIN IS SUBJECT TO ALL THE TERMS.EXCLUSIONS AND cotIomONS OF SUCH
POLICIES.AGGREGATE LIMITS SHOWN MAY HAVE BEEN REDUCED BY PAID CLAIMS.
MR ADM POUCY EFFECTER POLICY DONATIONMITEI ITR NMIYPEOP MIMEO! POLICY WISER _DATE IYWDDNYI DATEMIIDDNY)
EACH OCCURRENCE B
oENERALLIABAJrY DAIAAETO RENTED
1 - COMMERCIAL GEICAL LIABILITY PREMISPRP'e occumncel S
1 CLAIMS MADE in OCCUR MED E%P(Any one Person) S
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PERSONAL E ADV INJURY $
GENERAL AGGREGATE $
GENL AGGREGATE LIMIT APPLIES PER PRODUCTS COMP/OP AGO E
I —1 POLICY El TRi in L
AUTOMOBLE UMILITY COMBINED SINGLE UMIT $
(Ea NOSE)
ANY AUTO
ALL OWNED AUTOS BODILY INJURY S
(Per ILY
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HIRED AUTOS
AUTOS
HIREDAUT08 BODLY INJURY S
(Pr=Cddrll)
NON-OWNED AUTOS
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(Per
DAMAGE S
GARAGE LIANUTY AUTO ONLY-EA ACCIDENT S
—1 ANY AUTO OTHER THAN EA ACC S
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AUTO ONLY: AGG S
EXCESS/ MORELLA UAS*STY EACH OCCURRENCE E
n OCCUR CLAIMS MADE AGGREGATE E
S
E
IDES E
MINERS CO AM I TOWRYUMITSI I ER
A
EMPLOYERS'IUBIJTE EL EACH ACCIDENT S
ANY oFFICERMEMBER EXCLUDED? C� EL DISEASE-EA EMPLOYEE S
S E S tam E.L DISEASE•POLICY UNIT S
one
IA Closure CPCS99—0013 4/9/99 4/9/08 $1,575,058.00
A Post-Closure $1 064.58'1 00
DESCRIPTOR OF OPERATIONS/LOCATIONS I VEHICLES/EXCLUSIONS ADDED BY DIDCREEMENT/SPECIAL PROVISIONS
INorth Weld Sanitary Landfill, 40000 Weld County Road 25, Ault, CO 80610
This certificate certifies that the policy to which this certificate applies provides closure and past-closure
care in connection with the Insured's obligation to demonstrate financial resposibility under Section 1.8.9 of
' the regulations pertaining to Solid Waste Disposal Sites and Facilities 6 CLE 1007-2, as amended.
CERTIFICATE HOLDER CANCELLATION
SHOULD AMY OF THE ABOVE DESCRIBED POLICES BE CANCELLED BEFORE THE DONATION
Director MATE THEREOF,THE ISSUING INSURER WILL Es DAYS WRITTEN
I COLORADO DEPARTMENT OF PUBLIC HEALTH AND NOTICE TOme CERTIFICATE Hams mum TOTHIum;acesomnamonvowanc
ENVIRONMENT
Hazardous Materials/Waste Management Division �x l y(z, C,is j -
' 4300 Cherry Creek Drive South AUTHOR�DREORESExrfLTM
Denver, Colorado 80246-1530 Donna L. Meals, Vice President\& Secretary
m ACORD CORPORATION 1988
ACORD 25(2001108)
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Weld Co:.—; Planning Department
I "ELEY OFFICE
2007
WASTE MANAGEMENT APR 4 9 WASTE 01aANAGENMENT
�� ® Midwest Industrial Sales Office
April 2007 °E 7780 E.96th Ave.
P Henderson, CO 80640
(303)336-3900
Mr.Douglas Ikenberry,P.E. (303)280-9848 Fax
Colorado Department of Public Health and Environment
Hazardous Materials and Waste Management Division
HMWMD-SWIM-B2
4300 Cherry Creek Drive South
Denver, CO 80246-1530
Mr: Troy Swain
Weld County Department of Public Health and Environment
1555 N. 17th Avenue
Greeley, CO 80631
SUBJECT: NORTH WELD LANDFILL
FIRST QUARTER 2007 GAS MONITORING REPORT
Dear Mr. Ikenberry and Mr. Swain: CA 92 SqS
Enclosed for your information is the First Quarter 2007, Gas Monitoring Report for North Weld
Landfill (NWLF). The gas monitoring and corresponding report was completed by Waste
Management Disposal Services of Colorado, Inc. The gas report contains monitoring results from
the Phase 1 and 2 perimeter soil gas probes (GP) GP-6, GP-7, GP-10 through GP-20, and structure
probes GP-1 and GP-2 and inside the shop and office.
The gas monitoring report indicates that combustible gas was not detected in any perimeter probes
or on-site structures above regulatory limits.
If you have any questions regarding this report, please call Alan Scheere at (720) 977-2107 or Bill
Hedberg at(970) 686-2800.
Sincerely,
C/ 111
Alan Scheere
Environmental Specialist
cc: Kim Ogle, WCDPSw/o enc.
woraletter\nwgsrl
F: nwsl 4.2.5.07
f47 From everyday collection to environmental protection, Think Greens" Think Waste Management.
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