2026-07-30 · Arbor Hills Landfill · procedural · routine
An EPA air quality test observation form documenting a stack emissions test on the enclosed flares (FGENCLOSEDFLARES-S2) at Arbor Hills Landfill on 07/29/2026. The test measured VOC, NOx, and CO using Methods 2/3/4 and related protocols; the form records calibration data, equipment measurements, and procedural checkpoints completed during the observation.
Key data point: No emission results or violation findings stated; this is a procedural test-observation form recording instrument calibrations (e.g., CO Hi 51.52 ppm pre-run, 52.91 ppm post-run) and equipment parameters, not outcome data.
2026-07-30 · Arbor Hills Landfill · procedural · routine
GFL Environmental submitted an Air Quality Test Plan for Arbor Hills Landfill on July 30, 2026, to measure total reduced sulfur (SO₂) and hydrogen chloride (HCl) concentrations from enclosed flares. The test is scheduled to begin September 1, 2026, conducted by Environmental Information Logistics per permit conditions ROP0000224 v2.2.
Key data point: Test scheduled 09/01/2026 to measure SO2 and HCl concentrations from enclosed flares per FGENCLOSEDFLARES-S2 permit requirements.
2026-07-30 · Arbor Hills Landfill · procedural · routine
Environmental Information Logistics, LLC submits a test plan on behalf of Arbor Hills Landfill to EGLE for sampling hydrogen chloride (HCl) and total reduced sulfur (TRS) concentrations at the enclosed flare FGENCLOSEDFLARES-S2, with the first field test tentatively scheduled for September 1, 2026. The sampling will demonstrate compliance with emission limits specified in Renewable Operating Permit ROP0000224 v2.2 (HCl limit 6.0 lbs/hr and 26.1 tpy; SO2 limit 2.5 lbs/hr and 11.0 tpy on a 12-month rolling basis). The test plan details the methodology, including collection of duplicate grab samples in SilCo canisters analyzed via EPA-approved gas chromatography/mass spectrometry (GC/MS).
Key data point: Permitted HCl emission limit 6.0 lbs/hr (26.1 tpy 12-month rolling basis); SO2 limit 2.5 lbs/hr (11.0 tpy); estimated landfill gas to flare 3,100 scfm at 150°F; first test scheduled September 1, 2026.
2026-07-29 · Arbor Hills Landfill · procedural · routine
Arbor Hills Landfill submitted a response to a violation notice dated July 10, 2026, via the Michigan environmental portal on July 29, 2026. The submission is certified under penalty of law but the specific violation details and remedial claims are contained in the attached PDF, which is not provided in this text excerpt.
Key data point: No specific factual readings or violation details are stated in this cover page; the substantive response is in the attachment 'Arbor Hills response to 7-10-26 VN.pdf', which is not included.
2026-07-29 · Arbor Hills Landfill · procedural · notable
Arbor Hills Landfill received a violation notice on July 10, 2026 for failure to conduct required performance testing on enclosed flares within the mandated 20-calendar-quarter cycle; testing was due by December 19, 2024 but had not been performed. The facility has since submitted a test protocol (approved July 22, 2026), commenced testing on July 29, 2026 with EGLE witness, and plans to submit results by September 27, 2026.
Key data point: Failure to conduct enclosed flare NMOC/NOx/CO performance testing by December 19, 2024 deadline (5-year violation window); testing restarted July 29, 2026, report due September 27, 2026.
2026-07-29 · Arbor Hills Landfill · evidence · notable
EGLE conducted a required stack test on July 29, 2026 at Arbor Hills Landfill's two enclosed flares (Flares 391 and 392) to measure NMOC, NOx, and CO emissions. The test was late—due by December 2024 but not conducted until July 2026—prompting a Violation Notice issued July 10, 2026; GFL has committed to preventing future lapses and to report emissions at the facility-group level as required.
Key data point: Required stack test 20 months overdue (due Dec 2024, conducted July 29, 2026); Violation Notice issued July 10, 2026; Flare 391 measured at 1693°F, Flare 392 at 1474°F.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
GFL Environmental authorizes Keith Tollenaere of Crandell Environmental to submit permit applications on behalf of GFL for the Arbor Hills Landfill South Wetland Remediation Project. This is a procedural authorization letter filed with EGLE on February 5, 2026.
Key data point: No specific factual data or measurements; authorization letter only.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
This document presents a Conceptual Wetland Mitigation Plan for the Arbor Hills Landfill South Wetland project, showing a proposed 6.5-acre mitigation wetland divided into four tiers with berms and defining the project area boundary near 6 Mile Road and Brae Burn Golf Club.
Key data point: No specific factual readings or compliance claims; this is a conceptual map/planning document showing wetland acreage allocations (Tier 1a: 0.30 Ac, Tier 1b: 0.40 Ac, Tier 2: 1.15 Ac, Tier 3: 3.75 Ac, Tier 4: 0.89 Ac; total mitigation wetland 6.5 acres).
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
This is a nForm document dated 2026-07-23 acknowledging receipt of a project determination and stating that an Endangered Species Act compliance determination is complete. The submitter (Keith Tommeraere) is confirming that a 'no effect' determination has been made for a project area, with no suitable habitat present for development, and requests correspondence preservation.
Key data point: No specific quantitative data, measurement, or factual finding is stated. Document is an administrative acknowledgment of a completed ESA determination.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
This document presents engineering drawings and site plans for a wetland remediation project at the Arbor Hills Sanitary Landfill, prepared by Civil & Environmental Consultants in June 2026. The drawings depict wetland pond depth contours, sampling locations, cross-section profiles, and planned removal and infill work. The material is a procedural/technical design document supporting the wetland remediation initiative.
Key data point: No specific factual readings or regulatory claims are stated; this is a technical drawing set with design reference information only.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · notable
Arbor Hills Landfill, Inc. submits a Part 303 Wetland Permit Application to excavate and fill approximately 3.78 acres of Wetland 1 to permanently eliminate PFAS contamination resulting from a 2016 fire-suppression foam (AFFF) release at an adjacent recycling facility. The project aims to resolve Violation Notice VN-011821 by removing the principal remaining PFAS source contributing to exceedances at Outfall 001. Compensatory mitigation of 6.49 acres will be constructed at an off-site location within Salem Township.
Key data point: 3.78 acres of Wetland 1 to be excavated to average depth of 2 feet, with PFAS-contaminated sediments removed and disposed at AHLF; 2026 sampling confirmed elevated PFAS in Wetland 1 surface water and sediments, and groundwater seep from Wetland 1 into Pond 3 beneath railroad tracks.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · evidence · notable
GFL Environmental filed a May 2026 sediment characterization sampling report for the South Wetland at Arbor Hills Landfill. The report presents analytical results for metals, PAHs, and PFAS compounds detected in 12 wetland sediment samples compared to Michigan Part 201 residential cleanup criteria. Multiple samples exceed background levels and regulatory thresholds, particularly for PFOS and other legacy contaminants.
Key data point: Perfluorooctane sulfinate (PFOS) detected at 64.5 ug/kg (sample SED-08, May 1, 2026), exceeding typical environmental cleanup standards; PFHxS at 18.1 ug/kg (sample SED-07); arsenic up to 10,300 ug/kg; lead up to 152,000 ug/kg; chromium up to 1,000,000 ug/kg (permitted limit).
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
Arbor Hills Landfill (AHLF) filed a Joint Permit Application on July 23, 2026, seeking authorization to permanently remediate a contaminated wetland (Wetland 1) by excavating approximately 3.78 acres of emergent and forested wetland to an average depth of two feet and backfilling with clean soil. The remediation addresses Violation Notice VN-011821, issued in 2020 after PFAS contamination from a 2016 fire (involving aqueous film-forming foam) was detected in on-site stormwater samples; AHLF proposes off-site compensatory mitigation of 6.49 acres of reconstructed wetland in a nearby agricultural field adjacent to the Johnson Drain corridor.
Key data point: Wetland 1 contamination confirmed at elevated PFAS levels in May 2026 surface water and sediments, with confirmed groundwater seepage from Wetland 1 into Pond 3 beneath railroad tracks; surface water elevation in Wetland 1 approximately six feet higher than Pond 3, indicating potential for contaminant migration to Outfall 001 discharge.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
ECT conducted a wetland delineation study on a 14.04-acre area at Arbor Hills Landfill in Salem Township, Washtenaw County, Michigan to identify potentially regulated wetlands and surface water features under Michigan's NREPA Part 303 (Wetlands Protection) and Part 301 (Inland Lakes and Streams) in support of planned site activities.
Key data point: 14.04-acre wetland delineation area at Arbor Hills Landfill, Salem Township, Washtenaw County, Michigan; no specific factual measurements or violations stated on cover page.
2026-07-23 · Arbor Hills Landfill (Land & Water Interface) · procedural · notable
U.S. Fish and Wildlife Service technical assistance letter for a 3.68-acre wetland excavation and fill project at Arbor Hills Landfill (AHLF) to address PFAS contamination. The project triggers Endangered Species Act review and received 'may affect' determinations for Eastern Massasauga rattlesnake and Monarch butterfly, requiring additional coordination and implementation of specified conservation measures.
Key data point: 3.68-acre wetland (PEM and PFO) containing PFAS contamination; project scheduled for 2026 following permit receipt; 2 acres of non-forest-management tree cutting planned October 1–April 14, 2026.
2026-07-22 · Arbor Hills Landfill · procedural · routine
EGLE approved an air quality test plan submittal for Arbor Hills Landfill (permit 79-17 v1.0) on July 22, 2026. The plan was received June 26, 2026, and approved with no review comments. An EGLE supervisor clarified that lb/mmbtu limits apply to the facility group while ppm limits apply to individual emission units.
Key data point: Air quality test plan approved 7/22/2026; no specific factual readings or measurements stated in this procedural notification.
2026-07-22 · Arbor Hills Landfill · procedural · routine
GFL submitted an air quality test plan for Arbor Hills Landfill (SRN N2688) detailing how flare operators will measure landfill gas methane content every 15 minutes during testing to calculate heat input and compare air pollutant emissions against regulatory limits. EGLE requested clarification on the methodology for calculating fuel gas heat content.
Key data point: No specific quantitative measurements provided; document is a procedural submittal with a methodology question from EGLE.
2026-07-20 · Emerald RNG · procedural · notable
Emerald RNG LLC (operator of Arbor Hills Landfill, SRN N2688) filed a Minor Modification to its Air Renewable Operating Permit on May 13, 2025, requesting incorporation of PTI No. 67-23A v2.0 effective February 28, 2025. The modification doubles the site's allowable NOX emissions from 5.53 to 11.05 tons/year and CO emissions from 25.2 to 50.4 tons/year for the RNG fuel operation (EUOFRNG).
Key data point: NOX emissions ceiling increased 100% (5.53 → 11.05 tons/year); CO emissions ceiling increased 100% (25.2 → 50.4 tons/year) for RNG facility at Arbor Hills (N2688), effective 2/28/2025.
2026-07-20 · Emerald RNG · procedural · routine
This is a Michigan Renewable Operating Permit (ROP0000236 v3.0) for Emerald RNG LLC's air emissions at Arbor Hills Landfill (SRN N2688), setting forth emission limits, operational restrictions, and monitoring requirements for the renewable natural gas plant and thermal oxidizer. The permit establishes NOx and CO emission limits (0.06 lb/MMBTU hourly, 11.1 tpy annually for NOx; 0.20 lb/MMBTU hourly, 37.0 tpy annually for CO) and requires continuous monitoring of temperature and flow rate, plus semi-annual hydrogen sulfide sampling of landfill gas.
Key data point: Thermal oxidizer must operate continuously at minimum 1,450°F destruction temperature; NOx limit 0.06 lb/MMBTU hourly and 11.1 tpy 12-month rolling; CO limit 0.20 lb/MMBTU hourly and 37.0 tpy 12-month rolling.
2026-07-20 · Emerald RNG · procedural · routine
This is a Malfunction Abatement and Preventative Maintenance Plan for the Emerald RNG LLC facility at Arbor Hills, filed as part of a Renewable Operating Permit (ROP) application renewal in July 2026. The document describes monitoring parameters, corrective procedures for malfunctions, flare system operations, and recommended maintenance schedules to ensure the landfill gas treatment system operates within permitted requirements.
Key data point: No specific measured readings are provided. Document describes operating ranges and setpoints (e.g., TOX combustion chamber temperature ≥1,400°F, flare system operating ranges) but these are permitted/design parameters, not measured data.
2026-07-20 · Emerald RNG · procedural · routine
This is a Draft Staff Report for the Renewable Operating Permit (ROP) renewal for Emerald RNG LLC (P1488), a renewable natural gas processing facility located at the Arbor Hills Landfill site that treats landfill gas to pipeline-quality standards. The permit consolidates all applicable state and federal air quality requirements, with the facility subject to Title V major source requirements for carbon monoxide, nitrogen oxides, and sulfur dioxide. The document provides technical details, regulatory basis, compliance status, and notes that the facility is expected to be in compliance as of the ROP effective date.
Key data point: Actual emissions 2025: CO 41 tons/year (potential 87.4), NOx 9 tons/year (potential 22.1), PM10 15 tons/year, PM2.5 15 tons/year; facility subject to Consent Judgment CJ No. 2020-0593-CE and Consent Decree requiring sulfur treatment control system and Emerald RNG installation.
2026-07-16 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
EGLE issued a preapplication meeting determination on July 16, 2026, for GFL Environmental's proposed project at Arbor Hills Landfill in Salem Township, Washtenaw County. The agency found that a permit is required under Part 301 (Inland Lakes and Streams) and Part 303 (Wetlands Protection) of Michigan's NREPA. GFL must now submit a full Joint Permit Application for individual permit review, with a projected 30–150 day processing timeline depending on public notice and hearing requests.
Key data point: A permit is required for the project as proposed under Part 301 (Inland Lakes and Streams) and Part 303 (Wetlands Protection); determination binding for two years from July 6, 2026 meeting date.
2026-07-15 · Arbor Hills Landfill · evidence · routine
EGLE conducted an unannounced Asbestos NESHAP compliance inspection of Arbor Hills Landfill on June 25, 2026. The facility was found in compliance with asbestos handling procedures, though inspectors identified a need to add verification of adequate wetting to the ACWM load inspection checklist, which GFL has since updated. Three incidences of improperly packaged ACWM were self-reported post-inspection and corrective measures implemented.
Key data point: Site determined to be in compliance at time of inspection (June 25, 2026); three post-inspection self-reported ACWM packaging violations and corrected inspection checklist to include 'adequately wet' verification.
2026-07-13 · Arbor Hills Remediation Area · procedural · routine
A Discharge Monitoring Report (DMR) for Arbor Hills Remediation Area (Permit MI0045713 v6.0) for the period 6/1/2026–6/30/2026 reports treatment pond discharge parameters including flow, suspended solids, biochemical oxygen demand, ammonia nitrogen, phosphorus, cyanide, mercury, PFAS compounds (PFOS, PFBS, PFOA), temperature, pH, and dissolved oxygen. All monitoring data rows are blank (indicated by "No Discharge: Y" and asterisks), indicating either no discharge occurred or data was not submitted.
Key data point: The DMR states "No Discharge: Y" for all four limit sets and all 30 daily monitoring dates; actual measured values are not reported in the document.
2026-07-13 · Arbor Hills Landfill · procedural · routine
Green for Life (GFL) filed a 40 CFR Part 61 Asbestos Notification of Intent to Disturb Waste for Arbor Hills Landfill on July 13, 2026, describing annual GCCS Construction work from August 3 through December 31, 2026. The notification indicates dust control via water spray for asbestos-containing waste disturbance at the landfill site.
Key data point: Annual GCCS Construction excavation scheduled 08/03/2026–12/31/2026 with water spray dust control; filed 45+ days in advance per 40 CFR Part 61.
2026-07-10 · Arbor Hills Landfill · procedural · notable
GFL submitted flare throughput limits and leachate management system inspection/maintenance records for June 2025 – May 2026 in response to an EGLE Air Quality Division inspector's request following a June 2026 inspection. The submission documents leachate tank valve exercises, transducer inspections, and pump intake screen checks, and clarifies that two bullet tanks and the Arbor Hills West Pump Station were upgraded without carbon filtration systems despite CJ requirements.
Key data point: Two 50,000-gallon bullet tanks and Arbor Hills West Pump Station were replaced/upgraded without carbon filtration systems, contrary to Consent Judgment Appendix L requirements that all leachate storage tanks and pump stations include aeration and carbon filtration.
2026-07-08 · Emerald RNG · procedural · routine
EGLE Air Quality Division has issued a notice that Opal Fuels' Renewable Operating Permit (ROP) for its facility at 10719 West 5 Mile Road in Northville is entering a mandatory 30-day public comment period (July 20 – August 19, 2026), followed by a potential public hearing and 45-day EPA review before final approval.
Key data point: ROP renewal application received May 6, 2015; 30-day public comment period opens July 20, 2026 and closes August 19, 2026.
2026-07-08 · Emerald RNG · procedural · routine
Emerald RNG LLC is renewing its Title V Renewable Operating Permit (ROP No. ROP0000236 v3.0) for a facility at 10719 West 5 Mile Road in Northville, Michigan. The renewal is described as resulting in no emissions change. A public comment period is open until August 19, 2026.
Key data point: No specific factual readings or violations stated. This is a procedural permit renewal notice with a public comment deadline of August 19, 2026.
2026-07-08 · Arbor Hills Landfill · evidence · notable
EGLE's Air Quality Division issued a violation notice to Arbor Hills Landfill on July 10, 2026, citing failure to conduct required performance testing on enclosed flares for NMOC, NOx, and CO every 20 calendar quarters; testing was due by December 19, 2024 but has now been scheduled for July 27, 2026. The company must submit a written response by July 31, 2026, explaining the violation and corrective actions.
Key data point: NMOC/NOx/CO performance testing on enclosed flares FGENCLOSEDFLARES required by December 19, 2024; testing overdue as of June 16, 2026 inspection; now scheduled July 27, 2026.
2026-07-07 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
GFL Environmental requested a preapplication meeting for a proposed project at Arbor Hills Landfill in Salem Township, Washtenaw County. EGLE's Water Resources Division determined that a permit is required under Part 301 (Inland Lakes and Streams) and Part 303 (Wetlands Protection) of the Natural Resources and Environmental Protection Act. The applicant must now submit a Joint Permit Application and follow a 30-day administrative review period, then a 90–150 day processing period with public notice.
Key data point: Permit required for proposed project under NREPA Part 301 and Part 303; binding determination for 2 years from July 6, 2026 preapplication meeting (Submission HQP-5CHQ-0NBWQ).
2026-06-30 · Arbor Hills Landfill · procedural · routine
EGLE's Air Quality Division has approved Arbor Hills Landfill's protocol for emissions testing scheduled to begin July 29, 2026. The testing will measure nonmethane organic compounds (NMOC), nitrogen oxides, and carbon monoxide from two enclosed flares under permits PTI 79-17 and ROP0000224, with detailed specifications for sampling methods, calibration, and reporting requirements.
Key data point: No specific measured readings provided. Document is a procedural approval of a testing protocol with permitted limits: NMOC 20 ppmvd@3%O2vd, NOx 0.060 lb/mmbtu, CO 0.20 lb/mmbtu.
2026-06-26 · Arbor Hills Landfill · procedural · routine
This is a regulatory filing documenting permit limits for two enclosed flares (Units 391 and 392) at a municipal solid waste landfill under 40 CFR Part 63, Subpart AAAA. The flares are subject to specific emission limits for nitrogen oxides, carbon monoxide, and nonmethane organic compounds.
Key data point: No specific measured readings provided; document lists only permitted emission limits (0.060 lb/mmbtu NOx, 0.2 lb/mmbtu CO, 20 ppmvd NMOC) for two enclosed flare units under federal MSW landfill rules.
2026-06-26 · Arbor Hills Landfill · procedural · routine
This Stack Test Protocol document describes a compliance emissions testing plan for two enclosed flares at Arbor Hills Landfill scheduled for July 29-30, 2026. The protocol specifies EPA Methods for measuring carbon monoxide (CO), nitrogen oxides (NOx), and non-methane organic compounds (NMOC) to verify compliance with ROP permit limits. The testing contractor is Impact Compliance & Testing, Inc.
Key data point: Permit limits: CO 0.20 lb/MMBtu, NOx 0.060 lb/MMBtu, NMOC 20 ppmvd as hexane @ 3% O2 for both EUENCLOSEDFLARE1-S2 and EUENCLOSEDFLARE2-S2.
2026-06-26 · Arbor Hills Landfill · procedural · routine
GFL's Arbor Hills Landfill submitted an Air Quality Test Plan on 26 June 2026 for a stack test scheduled to begin 29 July 2026, conducted by Impact Compliance & Testing. The last performance test was in December 2019. This is a procedural compliance filing required under the facility's operating permit.
Key data point: No specific factual readings or measurements are provided in this test plan submittal; it is a scheduling and procedural notice.
2026-06-26 · Arbor Hills Landfill · evidence · notable
This document is a photographic or field-inspection attachment listing benchmark and monitoring locations (BM1–BM14, MK-1–MK-37, JB1–JB24) across the Arbor Hills Landfill, with brief categorical notes on conditions observed at each point. Observations include erosion rills, standing water, leachate outbreaks, sinkholes with high methane, penetrations, and odor issues from frac tanks.
Key data point: Document has no specific quantitative readings or dated factual claims; it is a visual inspection checklist with location identifiers and qualitative field notes (e.g., 'Sink hole with high methane' at MK-13, 'Leachate outbreak' at MK-8, 'Frac Tanks-localized strong odor' at JB4).
2026-06-26 · Arbor Hills Landfill · evidence · urgent
On June 16, 2026, EGLE conducted a surface emission monitoring (SEM) inspection at Arbor Hills Landfill and found 75 locations with methane concentrations exceeding 500 ppm above background, indicating widespread fugitive gas emissions. The inspection revealed significant operational challenges including approximately 50% of vertical wells impaired by liquid, persistent cover integrity issues with erosion rills and leachate outbreaks, and only 2 wells regularly exceeding 145°F. The landfill is subject to ongoing compliance obligations under the Consent Judgment (CJ No. 2020-0593-CE) methane action level of 40 ppm over 15 minutes, with perimeter monitors recording regular exceedances since installation in May 2022.
Key data point: 75 SEM hits at methane concentrations >500 ppm above background (range 500–148,682 ppm); two locations with extreme readings: MK-21 (125,578 ppm at liner tear) and JB9 (148,682 ppm at penetration well 502R), June 16, 2026. Approximately 50% of vertical wells (193 total) impaired by liquid with 12 wells severely submerged (screen >100%). Only 2 wells regularly exceeding 145°F; perimeter monitors document regular exceedances of Consent Judgment action level (40 ppm over 15 minutes).
2026-06-26 · Arbor Hills Landfill · (unprocessable source) · skipped
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2026-06-26 · Arbor Hills Landfill · (unprocessable source) · skipped
Source not classifiable after 3 attempts: Error code: 400 - {'type': 'error', 'error': {'type': 'invalid_request_error', 'message': 'You have reached your specified workspace API usa
2026-06-26 · Arbor Hills Landfill · (unprocessable source) · skipped
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2026-06-26 · Arbor Hills Landfill · evidence · routine
EGLE conducted a Solid Waste Enforcement and Monitoring (SEM) inspection of Arbor Hills Landfill on June 16, 2026. The document presents inspection findings in map format showing results locations and areas inspected. No specific violation findings or measurements are detailed in the excerpt provided.
Key data point: No specific factual readings or violations are stated in this excerpt; the document appears to be a cover sheet or map index for detailed results presented elsewhere.
2026-06-26 · Arbor Hills Landfill · evidence · urgent
This attachment documents site inspection findings at Arbor Hills Landfill, cataloging multiple physical defects and contamination observations including erosion rills, leachate outbreaks, standing water around wellheads, methane pockets, penetrations in the cap, and deodorizer applications. The observations span monitoring points (BM1–BM14), monitoring/marker locations (MK-1 through MK-37), and job-bag/inspection points (JB1–JB24) across the landfill perimeter and surface.
Key data point: Multiple documented leachate outbreaks and flowage into stormwater, sink hole with high methane detected, standing water around wellheads, and 24 cap penetrations identified across the site.
2026-06-26 · Arbor Hills Landfill · evidence · urgent
EGLE conducted an announced Surface Emission Monitoring (SEM) inspection on June 16, 2026, at Arbor Hills Landfill and identified 75 locations with methane concentrations exceeding 500 ppm above background. The inspection revealed significant operational issues including liquid impairment of approximately 50% of vertical wells, widespread cover integrity problems, leachate contamination entering stormwater ditches, and ongoing perimeter air monitor exceedances of the 40 ppm methane action level defined in Consent Judgment 2020-0593-CE.
Key data point: 75 SEM exceedances detected June 16, 2026: highest reading 148,682 ppm at Well 502R (Penetration), 125,578 ppm at liner tear location (MK-21), 27,736 ppm at penetration (MK-25); only 2 wells exceeding 145F (per wellhead review); ~50% of 353 vertical wells showing liquid impairment; perimeter monitors regularly exceeding 40 ppm action level since May 2022 installation.
2026-06-26 · Arbor Hills Landfill · procedural · routine
This document is labeled as 'Inspection Files' dated 2026-06-26 but contains no substantive text, data, measurements, or regulatory content to classify.
Key data point: No specific factual readings or claims are present in this document.
2026-06-23 · Arbor Hills Landfill · procedural · routine
GFL Environmental submitted dust control daily inspection logs for June 2025 through May 2026 to the Michigan EGLE Air Quality Division in advance of a scheduled Full Compliance Evaluation (FCE) inspection. The submission confirms one dry sweeper, two wet/dry sweepers, two water trucks as dust control equipment, and states no calcium chloride was applied during the 12-month period.
Key data point: No specific factual readings; this is a procedural compliance document confirming dust control equipment inventory and that no calcium chloride was applied June 2025–May 2026.
2026-06-23 · Arbor Hills Landfill · evidence · notable
GFL submitted surface and penetration emission monitoring (SEM) records to EGLE in advance of an AQD inspection scheduled for June 16, 2026. The package includes Q2–Q1 2026 quarterly SEM reports, cover integrity reports, and well location data. Q3 2025 SEM identified four methane exceedances above the 500 ppm regulatory standard that were resolved through corrective action and follow-up monitoring within the same quarter.
Key data point: Q3 2025 SEM: four methane exceedances detected August 5–8, 2025 (initial readings 904–1125 ppm), all resolved to below 500 ppm by September 3–5, 2025 via cover remediation.
2026-06-23 · Arbor Hills Landfill · evidence · routine
This is a May 2026 gas extraction report for Arbor Hills Landfill containing hundreds of quantitative readings (temperature, methane, CO2, oxygen) from monitoring wells across multiple dates. The document shows well-by-well operational data and lists approved temperature alternate standards (145F and 170F) for specific wells under HOV waivers.
Key data point: Highest measured temperature: 104F at well AHWC4CON on 5/27/2026 14:19 (below all permitted limits). Document lists 40+ wells with 145F approved alternate standard; one well (AHW263R5) with 170F approval.
2026-06-18 · Arbor Hills Landfill · evidence · notable
EGLE conducted a Full Compliance Evaluation (FCE) of Arbor Hills Landfill on June 16, 2026, finding the facility in substantial compliance with its ROP and federal standards, except for a missed flare stack test deadline (due December 2024, now scheduled for July 27, 2026). The inspection documented 75 methane surface emission (SEM) hits, mostly at cover erosion rills and penetrations, plus one significant leachate outbreak; the facility reported ongoing odor complaints from the community, high hydrogen sulfide concentrations in some wells (up to 45,000 ppm, with TS01R at 30,000 ppm), and continued operation of multiple gas collection wells and flares.
Key data point: H2S in well TS01R = 30,000 ppm; SEM survey identified 75 hits with one significant leachate outbreak; flare stack test violation: required December 2024 testing not completed until July 27, 2026 scheduled.
2026-06-18 · Emerald RNG · evidence · routine
EGLE conducted an unannounced on-site inspection of Emerald RNG LLC (a renewable natural gas facility at the Arbor Hills Landfill complex) on June 16, 2026, and reviewed compliance records for the prior 12 months. The facility was found in substantial compliance with its air permit (PTI 67-23A v2.0), federal and state air pollution control regulations, and its Consent Decree.
Key data point: Total Sulfur at STS outlet 7.29 ppmv as H2S (October 17, 2025), below the 20 ppmv limit; EURNGTOX minimum destruction temperature requirement 1450°F, operating at 1700°F or greater.
2026-06-18 · Arbor Hills Energy · procedural · routine
EGLE conducted a Full Compliance Evaluation and unannounced inspection of Arbor Hills Energy LLC (AHE), the landfill-gas-to-energy turbine operator at Arbor Hills Landfill, on June 16, 2026. AHE was found in full compliance with its Renewable Operating Permit (ROP MI-ROP-N2688-2011a), PTI 68-23A, and applicable federal and state air pollution regulations for the compliance period June 2025–May 2026; all required reports were submitted timely and the facility's turbines operated well below their emission limits for NOx, CO, SO2, VOC, and HCl.
Key data point: All measured emissions from AHE's four turbines were substantially below permitted limits (e.g., GT1 NOx 2.8 lbs/hr < 11.3 lbs/hr limit, T4 NOx 1.38 lbs/hr < 8.49 lbs/hr limit, as of May 2026); facility operated only 44 days total during the 12-month compliance period.
2026-06-15 · Arbor Hills Landfill (Land & Water Interface) · procedural · routine
GFL Environmental has filed engineering drawings for a wetland remediation project at Arbor Hills Sanitary Landfill dated May 2026. The document presents site maps, pond depth contours, sampling locations, and cross-section profiles for wetland removal and infill work. No quantitative environmental data, measurements, or compliance deadlines are stated in the drawings themselves.
Key data point: No specific factual readings or data points are provided; the document is a set of engineering/design drawings with legends and cross-section profiles only.