WDNR_-_Envrionmental_Plan_Modification_Approval_-_7.13.2020.pdf

July 13, 2020 File Ref: FID 113183620 Dane County

SW Approval Mr. Mike Kirchner, Airport Director Dane County Airport 4000 International Lane Madison, Wisconsin 53704

Subject: Conditional Construction Documentation Approval and Plan of Operation Approval Modification for Environmental Monitoring Program, Dane County Truax Landfill, License # 3306

Dear Mr. Kirchner:

The Department of Natural Resources (department) has reviewed and conditionally approves the construction documentation submitted for the installation, abandonment, and repair work performed on monitoring wells and gas probes at the Truax Landfill. The work was conducted in response to a potential gas migration issue at the site. Please include the attached approval in the written operating record for the landfill as specified in s. NR 506.17, Wis. Adm. Code.

The report documents the installation of three new gas probes (GP-36, GP-37 and GP-38), the abandonment of one unknown groundwater monitoring well and one unknown gas probe, and repair/modification to gas probes GP-19E North, GP-19E South, GP-20 East, GP-20 West, GP-21 East and GP-21 West. The gas probes were adjusted to be stick-ups instead of flush mounts.

The environmental monitoring program has been updated to include the new gas probes and to change the monitoring frequencies for some of the monitoring wells and gas probes. Refer to the attached tables.

If you have questions regarding this approval, please contact Carolyn Cooper at carolyn.cooper@wisconsin.gov or 608-275-7779.

Sincerely, Cynthia Moore Waste and Materials Management Program Supervisor South Central Region cc: John Welch – Dane County (e-copy)

Colin Maus – DNR SCR (e-copy) Carolyn Cooper – DNR SCR (e-copy) Robert Langdon – SCS Engineers (e-copy)

Tony Evers, Governor Preston D. Cole, Secretary

Telephone 608-266-2621 Toll Free 1-888-936-7463

TTY Access via relay - 711

State of Wisconsin

DEPARTMENT OF NATURAL RESOURCES

3911 Fish Hatchery Road Fitchburg WI 53711-5397 mailto:carolyn.cooper@wisconsin.gov

Dane County Truax Landfill (License No 3306) – Construction Documentation Approval Page 2 of 5 July 13, 2020

BEFORE THE

STATE OF WISCONSIN

CONDITONAL CONSTRUCTION DOCUMENTATION APPROVAL

AND PLAN OF OPERATION APPROVAL MODIFICATION FOR

DANE COUNTY TRUAX LANDFILL (License # 3306)

FINDINGS OF FACT

The Department of Natural Resources (department) finds that:

1. Dane County owns a closed solid waste disposal facility located in the NE ¼ of Section 31, T8N, R10E, City of Madison, Dane County Wisconsin.

2. In 1972, the Department issued the City of Madison License #0306 for the Truax Landfill. In 1973, ownership of the landfill was transferred from the City of Madison to Dane County.

3. The facility is a non-approved facility under s. 289.01(24), Stats. Prior to 1990, the Department had not approved any plans for the landfill. In 1990, the Department assigned license number #3306 to the landfill and a facility identification number (FID #113183620).

4. On February 28, 2020, Dane County submitted construction documentation to the department for installation, abandonment, and repair work performed on monitoring wells and gas probes at the Dane County Truax Landfill. The review fee of $1,650 was received by the department on July 6, 2020.

5. The information submitted in connection with the construction documentation and the modification request includes:

a. A letter entitled “Monitoring Point Installation/Abandonment/Repair Documentation and Plan Modification to Environmental Monitoring Plan, Dane County Truax Landfill, Madison, Wisconsin” dated February 28, 2020 and received by the department on March 3, 2020.

6. Additional documents considered in connection with the construction documentation and the modification request include the following:

a. The department's July 12, 1995 conditional plan approval for the landfill final cover and gas extraction system, Truax Landfill, Madison Wisconsin.

b. The department’s November 18, 1999 conditional plan of operation approval of an environmental monitoring program.

c. The department's March 22, 2002 conditional plan of operation approval modification for a revised environmental monitoring program schedule.

d. The department's January 20, 2004 expedited plan of operation approval modification for groundwater monitoring.

Dane County Truax Landfill (License No 3306) – Construction Documentation Approval Page 3 of 5

e. The department's December 15, 2004 expedited plan of operation approval modification for the addition of three gas extraction wells.

f. The department’s February 20, 2007 letter regarding approval of a reduction in monitoring for Wells

N-4 and N-5.

g. The department's October 15, 2007 plan of operation approval modification for a reduction in groundwater and gas probe monitoring requirements.

h. The department's May 31, 2012 expedited plan of operation approval modification for a reduction in reporting frequency, condensate monitoring, and monitoring of the blowers.

i. The department’s February 25, 2019 email correspondence to Dane County regarding the county’s July 5, 2018 and February 18, 2019 letters.

j. Dane County’s August 16, 2019 construction documentation for installation, abandonment, and repair work performed on monitoring wells and gas probes.

k. The department's February 4, 2020 construction documentation approval and plan of operation approval modification for installation, abandonment, and repair work performed on monitoring wells and gas probes.

l. The department’s files pertaining to the Dane County Truax Landfill (License # 3306).

7. The special conditions set forth below are needed to assure that the site is operated and maintained in an environmentally sound manner. If the special conditions are complied with, the proposed modifications will not inhibit compliance with the standards set forth in the applicable portions of chs.

NR 500-538, Wis. Adm. Code.

CONCLUSIONS OF LAW

1. The department has authority under s. 289.30, Wis. Stats., and ch. NR 516, Wis. Adm. Code, to require that the owner of a solid waste disposal facility demonstrate that the facility has been constructed in substantial compliance with the conditional plan of operation approval.

2. In accordance with the foregoing, the department has the authority to issue the following construction documentation approval.

3. The department has the authority under s. 289.30(6) Stats., to modify a plan of operation approval if the modification would not inhibit compliance with the applicable portions of chs. NR 500-538, Wis. Adm.

Code.

4. The department has the authority to approve a modification to the plan of operation with special conditions if the conditions are needed to ensure compliance with the applicable portions of chs. NR 500-538, Wis. Adm. Code.

Dane County Truax Landfill (License No 3306) – Construction Documentation Approval Page 4 of 5

5. The conditions of approval set forth below are needed to ensure compliance with the applicable portions of chs. NR 500-538, Wis. Adm. Code.

6. In accordance with the foregoing, the department has the authority under s. 289.30(6), Stats., to issue the following conditional plan of operation modification approval.

CONDITIONAL CONSTRUCTION DOCUMENTATION APPROVAL

The department hereby approves the proposed construction documentation report and the proposed plan modification for the Dane County Truax Landfill, subject to compliance with chs. NR 500-538, Wis. Adm. Code, and the following conditions:

1. In addition to the notification requirements under s. NR 507.22(1)(c), Wis. Adm. Code, Dane County shall notify the department in writing within 7 days of detecting methane at or above the lower explosive limit (LEL) in gas monitoring probes GP-3S, GP-36, GP-37, or GP-38.

2. For the gas probes monitored on a quarterly basis, Dane County shall increase the frequency from quarterly to monthly if a confirmed methane detection is at or above 0.5 percent. The department shall be notified in writing within 30 days of the confirmed reading.

3. For the gas probes monitored on a monthly basis, Dane County may decrease the frequency from monthly to quarterly if those probes do not have confirmed methane detection above 0.5 percent over a one-year period. The department shall be notified in writing within 30 days of the change in monitoring frequency.

4. The monitoring of gas probes GP-3S, GP-36, GP-37 and GP-38 shall remain on a monthly basis and would not decrease to quarterly monitoring allowed by condition 3 above.

5. Dane County shall abandon groundwater monitoring well TG-2 within 180 days of the date of this approval. Documentation of the abandonment shall be submitted to the department within 30 days of completion of the work.

6. Environmental monitoring shall be performed in accordance with the attached environmental monitoring tables 1 through 3. This condition supersedes all environmental monitoring requirements contained in previous department approvals.

This approval is based on the information available to the department as of the date of approval. If additional information, project changes or other circumstances indicate a possible need to modify this approval, the department may ask you to provide further information relating to this activity. Likewise, the department accepts proposals to modify approvals, as provided for in state statutes and administrative codes.

NOTICE OF APPEAL RIGHTS

If you believe you have a right to challenge this decision made by the department, you should know that Wisconsin statutes and administrative codes establish time periods and requirements for reviewing department decisions.

Dane County Truax Landfill (License No 3306) – Construction Documentation Approval Page 5 of 5

To seek judicial review of the department’s decision, sections 227.52 and 227.53, Stats., establish criteria for filing a petition for judicial review. You have 30 days after the decision is mailed or otherwise served by the department to file your petition with the appropriate circuit court and serve the petition on the department.

The petition shall name the Department of Natural Resources as the respondent.

Dated: __________July 13, 2020______

For the Secretary

Cynthia Moore Waste & Materials Management Program Supervisor South Central Region

Colin Maus Waste Management Engineer

Carolyn Cooper, P.G.

Hydrogeologist

Sampling & Reporting1. Parameter Wells DNR ID# Wells DNR ID# Frequency Codes Parameters

MW-3A 009 Sample 04189 Elevation, Groundwater (ft above MSL) MW-4B 015 Semiannually 00001 Odor MW-5B 021 March and September 00002 Color MW-12B 073 00003 Turbidity MW-12C 077 00010 Temperature, of water taken in field 0C MW-14 071 00094 Field Conductivity @ 250 C (umho/cm)

00400 Field pH (standard units) 00631 Nitrite plus Nitrate, dissolved (mg/l as N) 00946 Sulfate, dissolved (mg/l) 01000 Arsenic, dissolved (ug/l) 01007 Barium, total (ug/l) 01025 Cadmium, dissolved (ug/l) 01046 Iron, dissolved (mg/l) 01049 Lead, dissolved (ug/l) 01056 Manganese, dissolved (ug/l) 22413 Total Hardness, filtered (mg/L) 39036 Alkalinity, filtered (mg/L)

Sample VOCs (ug/L), EPA Method 8260 (NR 507, App III) Annually

September

MW-1R 002 Sample 04189 Elevation, Groundwater (ft above MSL) MW-3 007 Annually 00001 Odor MW-4 011 September 00002 Color

MW-4A 013 00003 Turbidity MW-5 017 00010 Temperature, of water taken in field 0C

MW-5A 019 00094 Field Conductivity @ 250 C (umho/cm) MW-7 025 00400 Field pH (standard units) MW-10 031 00631 Nitrite plus Nitrate, dissolved (mg/l as N) MW-11 063 00946 Sulfate, dissolved (mg/l) MW-13 067 01000 Arsenic, dissolved (ug/l)

MW-13A 069 01005 Barium, total (ug/l) MW-15 079 01025 Cadmium, dissolved (ug/l)

01046 Iron, dissolved (mg/l) 01049 Lead, dissolved (ug/l) 01056 Manganese, dissolved (ug/l) 22413 Total Hardness, filtered (mg/L) 39036 Alkalinity, filtered (mg/L)

1. Unless specifically stated, reporting is as per code typically within 60 days after the end of the specified monitoring period.

Trip Blank (999) and/or Field Blank (997) data must also be submitted electronically.

Groundwater Monitoring Wells

Environmental Monitoring Tables

Table 1 - Groundwater Monitoring

Dane County Truax Landfill License # 3306

Sampling & Reporting1,2 Parameter Frequency Codes Parameters

Monitoring Pt ID# Monitoring Pt ID#

GP-1D 503 GP-34 563 Monthly 85547 Percent Methane, by volume GP-2S 505 GP-36 566 Report Semiannually 85550 Percent Oxygen, by volume GP-2D 507 GP-37 567 (March and September) 46389 Soil Gas Pressure

GP-3S 509 GP-38 568

GP-3D 511

GP-1SR 502 GP-20 West 549 GP-10 523 GP-21 East 551 Quarterly 85547 Percent Methane, by volume GP-12 527 GP-21 West 553 (March, June, September 85550 Percent Oxygen, by volume GP-16 535 GP-30 555 and December) 46389 Soil Gas Pressure GP-18 539 GP-31 557 Report Semiannually

GP-19W 541 GP-32 559 (March and September) GP-19E North 543 GP-33 561 GP-19E South 545 GP-35 565

GP-20 East 547

Monitoring Pt ID# Monitoring Pt ID#

N-1 641 W-9 631 N-2 643 W-10 633 Monthly 85547 Percent Methane, by volume N-3 645 W-11 635 Report Semiannually 85550 Percent Oxygen, by volume N-4 647 W-12 637 (March and September) 46385 Wellhead Pressure (inches) N-5 649 W-13 639 46387 Valve Setting (% open) W-1 611 W-14 615 46388 Gas Temperature (oF) W-2 613 W-15 625 W-3 617 W-16 640 W-4 619 S-1 651 W-5 621 S-2 653 W-6 623 S-3 655 W-7 627 S-4 657 W-8 629

TR-1 700 TR-9 714

TR-2 702 TR-10 716 Monthly 85547 Percent Methane, by volume TR-5 708 TR-11 718 Report Semiannually 85550 Percent Oxygen, by volume TR-6 710 TR-12 720 (March and September) 46385 Wellhead Pressure (inches) TR-8 712 TR-13 722 46387 Valve Setting (% open)

ID#

Twice Monthly 46385 Wellhead Pressure (inches) 760 Report Semiannually 762 (March and September)

85547 Percent Methane, by volume Blower Outlet 764 Twice Monthly 85550 Percent Oxygen, by volume

Report Semiannually 46385 Pressure (inches) (March and September)

Site Conditions 900 Record at each 00021 Ambient Air Temperature (oF) monitoring event 00025 Barometric Pressure (mm of Hg)

Report Semiannually 46381 Trend in Barometric Pressure (March and September)

Ground conditions, report annually in O&M Report

Monthly Gas Probes:

Dane County Truax Landfill License # 3306

Environmental Monitoring Tables

Table 2 - Landfill Gas Monitoring

Landfill Gas Monitoring Probes indicated as "Report Semiannually", the reporting is due within 60 days after the end of the last monitoring period in the semiannual period.

2. Immediate notification may be necessary under NR 507.22(1)(c) Wis. Adm. Code.

1. Unless specifically stated, reporting is as per code typically within 60 days after the end of the specified monitoring period. For items

Quarterly Gas Probes:

Monitoring Point - DNR ID #

Site Conditions

Landfill Gas Extraction Wells

Blower Inlets:

Monitoring Pt

Vertical System Inlet Horizontal System Inlet

Blower Outlet:

Gas Extraction Wells (Vertical System):

Gas Extraction Valves (Horizontal System):

Blower

Sampling & Reporting Parameter Monitoring Pt. DNR ID# Monitoring Pt. DNR ID# Frequency Codes Parameters

Gas Condensate: Monthly Report gas condensate liquid level and operational (Report Annually) status of the wet well lift station in the annual O&M Report

Lift Station 770

Sample Annually 00094 Field Conductivity @ 25oC (umho/cm)

(September) 00150 Suspended Solids, total (mg/l) 00310 BOD (5 day @ 20oC (mg/L)) 00340 COD, unfiltered (mg/L) 00400 Field pH, (standard units) 00410 Alkalinity, total as CaCO3 (mg/L) 00610 Nitrogen, Ammonia, total (mg/L as N) 00625 Nitrogen, Kjeldahl, total (mg/L as N) 00900 Hardness, total (mg/L as CaCO3) 00929 Sodium, total (mg/L) 00940 Chloride, total (mg/L) 00945 Sulfate, total (mg/L) 00951 Fluoride, total (mg/l) 01027 Cadmium, total (ug/l) 01032 Chromium, hexavalent (ug/l as Cr) 01051 Lead, total (mg/L) 01055 Manganese, total (mg/L) 71900 Mercury, total (mg/L) 74010 Iron, total (mg/L)

VOCs (ug/L), EPA Method 8260 (NR 507, App III)

Base Neutral/Acid Extractable compounds, EPA Method 8270

Table 3 - Gas Condensate Monitoring

Dane County Truax Landfill License # 3306

Environmental Monitoring Tables