2026-02-05 · procedural · routine
Weaver Consultants Group conducted a third-party engineering evaluation of Arbor Hills Landfill in Q3 2022 (September 15, 2022 inspection) to assess leachate minimization and stormwater management under the Consent Judgment. The report finds that cover systems, grading, and stormwater diversion are generally in good condition and capable of minimizing infiltration, though minor improvements are recommended for vegetation, erosion repairs, and ditch completion.
Key data point: No specific measured data point. Report is a qualitative engineering assessment; no temperature, CO, or chemical readings are provided.
2026-02-05 · evidence · notable
GFL's Q3 2023 Wells of Interest (WOI) Quarterly Status Report documents temperature, gas composition, and operational data for the HOV-waivered wells at Arbor Hills Landfill. The report shows ongoing subsurface oxidation monitoring, with multiple wells displaying elevated temperatures (several in the 120–158°F range); well replacements and gas-extraction infrastructure upgrades continue to address historical subsidence and cracks. No new subsidence or geysers have been observed since March 2019, though carbon monoxide and hydrogen levels remain tracked monthly.
Key data point: Well AHWW312R measured at 158.3°F (8/29/2023), approaching the 180°F permitted ceiling under HOV waiver; 16+ wells remain on active HOV waivers since 2019; three new wells (AHWW0313, AHWWTS01, AHWW0287) added to WOI in June 2023 due to temperatures exceeding 131°F.
2026-02-05 · procedural · routine
GFL submitted a status update on September 28, 2023, regarding corrective actions at vertical gas collection wells at Arbor Hills Landfill, following an EGLE-approved supplemental extension request from June 2023. The letter reports on actions with target due dates of August 7 and September 26, 2023, and commits to submitting follow-up reports by October 30, 2023, and January 30, 2024.
Key data point: No specific quantitative readings or measured violation data provided; document is a procedural status update with no citable factual claims about temperatures, CO levels, or compliance metrics.
2026-02-05 · evidence · routine
Q1 2023 Well Liquid Monitoring and Management Report for Arbor Hills Landfill covering gas well screen submersion, obstruction, and pump status across East and West sections. The report documents widespread well infrastructure issues including obstructions, stuck pumps, high liquid levels, and corrective actions needed across dozens of monitoring wells.
Key data point: No specific measured temperature, CO, or other air-quality readings are presented in this excerpt. The document focuses on well liquid levels, screen submersion percentages, and pump operational status rather than subsurface oxidation or gas-extraction metrics.
2026-02-05 · evidence · routine
This is a Q1 2024 Well Liquid Monitoring and Management Report for Arbor Hills East and West Landfills, documenting gas well screen submersion, liquid levels, pump performance, and maintenance actions across multiple monitoring tables. The report tracks operational status, identifies wells requiring corrective action, and logs pump daily averages and sediment obstruction data for the first quarter of 2024.
Key data point: No quantitative temperature, CO, or air-quality measurements are present in the excerpted pages. This is a hydrogeological and gas-extraction monitoring document (liquid levels, screen submersion, pump counts) rather than an air-emissions or temperature report.
2026-02-05 · evidence · notable
This is a 328-page Gas Extraction Report from Arbor Hills Landfill covering September and October 2022, including methane/CO₂/O₂ composition data from extraction wells, carbon monoxide (CO) Drager tube readings from 23+ Wells of Interest (WOI), and hydrogen/nitrogen test results. The document confirms quarterly monitoring of gas composition and subsurface oxidation indicators across the active landfill gas system under the May 2019 HOV (Higher Operating Value) approval.
Key data point: Drager tube CO readings from WOI wells in September and October 2022 ranged from 0 to 5–10 ppm; hydrogen readings consistently 0.0–0.2%; no measured temperatures cited in these excerpts, but wells became WOI status due to prior recorded temperatures exceeding 131°F (notably AHW237R3, AHW251R2, AHW300 as of September 1, 2020, and AHW306R, AHW503R as of June 18, 2019).
2026-02-05 · procedural · routine
This is the 2022 Annual Supplemental Environmental Projects (SEP) report filed by Arbor Hills Landfill under Consent Judgment No. 2020-0593-CE. The report documents three SEP initiatives: installation and operation of six perimeter air-monitoring stations (H2S and methane), construction of a Household Hazardous Waste facility, and planting of 72 spruce trees as a vegetative buffer to reduce odor and particulate transport.
Key data point: No specific measured air-quality or temperature readings are provided in the excerpted pages. The report documents SEP expenditures ($585,703.55 for perimeter monitoring in 2022) and facility completion dates but does not include quantitative emissions or temperature data.
2026-02-05 · evidence · notable
This 592-page Gas Extraction Report for Arbor Hills Landfill documents well monitoring data from January to March 2024, including detailed gas composition (methane, CO2, oxygen), temperature readings from multiple extraction wells, and carbon monoxide measurements across the Wells of Interest (WOI) network. The report includes pump maintenance records and operational status for the landfill gas management system.
Key data point: Multiple WOI wells show measured temperatures in the 116–124°F range (AH147AR4, AH148AR3, AH148BR2 measured 117.9–124.1°F, Jan–Mar 2024); CO readings remain low (0–5 ppm predominantly), with isolated March spikes (10–30 ppm in AHWW287R, AHWW311R, AHWW312R, AHWWTS01).
2026-02-05 · evidence · notable
This Q4 2022 Vertical Gas Collection Well Liquid Monitoring and Management Report documents the condition of gas extraction wells at Arbor Hills Landfill and compliance with Consent Judgment No. 2020-0593-CE. The report assesses liquid levels, screen submersion, obstructions, and pump performance across multiple wells in both the East (AH East) and West (AH West) sections, identifying wells requiring replacement or corrective action.
Key data point: Multiple wells identified with obstruction, pinching, and inadequate screen submersion requiring redrill or replacement by 5/29/2023; well obstruction issues documented with camera work (e.g., AHWW0290, AHWW0301, AHWW0302, AHWW303R); no measured temperature readings provided in this report.
2026-02-05 · procedural · routine
Tetra Tech engineers conducted a Q1 2024 quarterly inspection of Arbor Hills Landfill to evaluate leachate minimization and stormwater management under the 2022 Consent Judgment. The inspection found cover systems generally in good condition and capable of diverting stormwater, with ongoing final cover installations on the south slope nearing completion and minor repairs recommended for erosion control and vegetation establishment.
Key data point: No specific quantitative data; document is a qualitative engineering inspection. Key finding: cover systems functioning adequately and diverting stormwater; approximately 19 acres of final membrane liner (FML) installed on south slope with protective cover being placed.
2026-02-05 · evidence · routine
This is a Q2 2023 Liquid Level Report for Arbor Hills East vertical gas wells, presenting detailed hydrogeological measurements (depth to liquid, leachate thickness, screen submersion) across 79 pages of tabular data for multiple monitoring wells.
Key data point: No specific factual readings (temperatures, CO, contaminant concentrations, or regulatory violations) are presented in this liquid level dataset; the document contains only well construction parameters and leachate depth measurements.
2026-02-05 · evidence · routine
This is GFL's 2025 First Semi-Annual WOI (Wells of Interest) Status Report submitted to EGLE in July 2025, covering January–June 2025 landfill gas extraction and temperature monitoring at Arbor Hills Landfill under active HOV (Higher Operating Value) waivers. The document reports continued infrastructure upgrades, well replacements, and gas-quality data consistent with historical ranges, with no new subsidence or cracks since 2019.
Key data point: Well AHWW0279 measured at 156.1°F (6/24/2025), consistent with its 155°F HOV approval; no measured temperature exceeded the 180°F permitted ceiling during the reporting period.
2026-02-05 · procedural · routine
OPAL Fuels submitted a monthly operational report for Arbor Hills Energy LLC to EGLE's Air Quality Division for August 2023, as required under PTI No. 68-23. The document confirms compliance reporting was filed with the state regulator.
Key data point: No specific factual readings or measurements are disclosed in this cover letter; the actual monthly report data is referenced as 'enclosed' but not reproduced here.
2026-02-05 · evidence · notable
GFL Arbor Hills Landfill submitted its 2025 First Semi-Annual WOI (Wells of Interest) Status Report covering January through June 2025, detailing monitoring of temperature-controlled wells, gas extraction infrastructure improvements, and maintenance activities. The report documents ongoing subsurface conditions, gas quality data, and compliance with HOV (Higher Operating Value) approval letters. GFL reports that no new subsidence, cracks, or ground movement have been identified since 2019, and that gas quality has remained consistent.
Key data point: Well AHWW0279 measured at 156.1°F (6.1°F above the 150°F HOV limit) on 2025-06-24; multiple wells maintained on active HOV waivers with approved temperature ceilings ranging from 155°F to higher values; report references earlier subsurface oxidation event in 2019 attributed to "near-surface subsurface oxidation event."
2026-02-05 · evidence · routine
This is a 76-page quarterly liquid-level report (Q4 2022) for gas extraction wells at Arbor Hills East landfill, documenting depth-to-liquid measurements, screen submersion percentages, and sediment obstruction levels across multiple well locations from 2020–2022. The data shows ongoing monitoring of leachate levels in gas wells with periodic dry conditions and varying degrees of screen submersion. No temperature, carbon monoxide, or air-quality measurements are included in this excerpt.
Key data point: No specific factual measurement of temperature, CO, or air quality is stated. Document contains only liquid-level and well-construction data.
2026-02-05 · procedural · routine
Tetra Tech conducted a required quarterly leachate minimization engineering evaluation at Arbor Hills Landfill in May 2024, assessing stormwater diversion, cover integrity, and settlement risk under the 2022 Consent Judgment. The site's grading, interim/temporary/final cover systems, and stormwater controls were found to be generally in good condition and capable of diverting stormwater away from active areas, with precipitation infiltration potential improved from Q1 2024. Several areas require vegetation establishment, minor erosion protection improvements, and ongoing monitoring of settlement and cover conditions.
Key data point: Q2 2024 quarterly inspection (May 15, 2024) found stormwater diversion adequate; interim cover slopes at 4:1 (25%) or less; minimal settlement observed; 10.5-acre temporary cap area supplemented with 2 feet of clay soils; one erosion gully noted requiring attention.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This Q2 2023 Liquid Level Report for Arbor Hills East Vertical Gas Wells presents detailed measurements of leachate depth, screen submersion, and well construction parameters across multiple monitoring wells over time. The data track subsurface conditions from 2020 through May 2023, documenting variations in liquid levels and sediment obstruction across the facility's gas extraction network.
Key data point: No specific temperature, CO, or regulatory violation data present in this Liquid Level Report—the document contains only leachate depth, screen submersion percentages, and well construction parameters. No urgent or notable readings extracted.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This is the Q2 2024 Consent Judgment quarterly report submitted by Arbor Hills Landfill to EGLE, documenting vertical gas collection well liquid monitoring and management across both the East (closed, unlined 131-acre) and West (open, double-lined 210.5-acre) sections of the landfill. The report fulfills reporting requirements under Consent Judgment No. 2020-0593-CE and includes detailed well-by-well liquid level, gas composition, temperature, and pumping data.
Key data point: No measured temperature readings above 145F reported in Q2 2024 VGC well data; document is a routine operational and compliance report with no acute thermal exceedance flagged.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This Q2 2023 Well Liquid Monitoring and Management Report documents the operational status of gas extraction wells at Arbor Hills East and West Landfills, covering well depths, liquid levels, screen submersion, pump performance, and corrective actions. The report identifies numerous wells with maintenance issues including stuck pumps, obstructions, and inadequate screen exposure, along with EGLE-approved corrective action extension requests and redrill plans.
Key data point: Multiple wells show pump failures and obstructions requiring corrective action; 10+ wells in West Landfill designated for redrilling; EGLE approved corrective action extension requests on 6/15/2023 for wells including AHW260R2, AHWW0262, AHWW0287, AHWW0290, AHWW0301, AHWW0302, AHWW334, AHWW0278, and others.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This Q1 2023 Well Liquid Monitoring and Management Report documents the status of gas extraction and leachate management systems at Arbor Hills East and West Landfills. It tabulates screen submersion, obstruction levels, pump operation, and corrective actions across dozens of monitoring wells, revealing widespread system degradation including stuck pumps, obstructed pipes, and high liquid levels requiring well replacement or reinstallation.
Key data point: Multiple wells showing >50% screen submersion or obstruction requiring corrective action; numerous wells flagged for pump installation, replacement, or air/force-main restoration due to operational failures in Q1 2023.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This is a Q2 2023 quarterly well monitoring report for Arbor Hills East and West Landfills documenting leachate and gas extraction well operational status, liquid levels, screen conditions, pump performance, and recommended corrective actions across multiple well categories.
Key data point: Multiple wells across both East and West facilities show persistent operational issues: wells with obstructed screens, stuck or non-functioning pumps, high liquid levels submerging >50% of screens, and numerous corrective action extensions approved by EGLE; report spans pages 1-48 covering dozens of individual well assessments from 2023Q2 (Q2 = Apr-Jun 2023).
2026-02-05 · Arbor Hills Landfill · evidence · notable
This is the cover letter and first set of attachments for the 2023 Second Semi-Annual Consent Judgment Report (CJ No. 2020-0593-CE) filed by Arbor Hills Landfill on March 15, 2024. The document addresses multiple compliance sections including H2S concentrations, corrective actions completed, SEM exceedances, and perimeter monitoring procedures. Specific measured temperatures and gas-collection system maintenance are documented across multiple wells.
Key data point: Well 258R measured temperature approximately 120°F (4th Quarter 2023 SEM data, as of ~December 2023)
2026-02-05 · Arbor Hills Landfill · procedural · routine
Arbor Hills Landfill submitted a Consent Judgment-mandated action plan in November 2023 to minimize leachate generation, based on a third-party engineering evaluation by Tetra Tech conducted in October 2023. The plan addresses stormwater diversion, cover maintenance, vegetation establishment, and erosion control across multiple landfill slopes and cells. No quantitative measurements of temperature, gas, or water quality are reported in this document.
Key data point: No specific factual readings (temperature, CO, leachate levels, or water-quality data) are provided; this is a procedural compliance submission describing planned and completed maintenance actions.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This is a Q4 2022 Vertical Gas Collection (VGC) Well Liquid Monitoring and Management Report for Arbor Hills Landfill, prepared by SCS Engineers in compliance with Consent Judgment No. 2020-0593-CE. The report documents liquid level monitoring, gas composition measurements, and pump performance across dozens of gas extraction wells in both the West (open) and East (closed) sections of the landfill, with recommendations for well replacements and maintenance actions.
Key data point: No specific measured temperature, CO, or oxygen readings are provided in the excerpted pages. Document contains liquid level depths, screen submersion percentages, and pump operational data, but no gas composition or thermal exceedance data in the shown sections.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This is the 2022 Q2 Consent Judgment quarterly report for Arbor Hills Landfill, submitted by GFL Environmental to EGLE in July 2022. The document contains detailed tables tracking gas well liquid levels, pump operations, screen submersion, and corrective actions across multiple wells at the East and West landfill sections. It documents widespread maintenance issues including stuck pumps, obstructed wells, and wells recommended for replacement or abandonment.
Key data point: No single temperature or CO reading provided; document focuses on leachate/liquid level management, pump status, and well obstruction data rather than subsurface temperature or combustion gas monitoring.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Weaver Consultants Group performed a third-party engineering evaluation of Arbor Hills Landfill's leachate minimization systems in Q3 2022, as required by the Consent Judgment. The inspection found cover systems in generally good condition with adequate stormwater diversion; minor repairs from Q2 were completed, and several recommendations for ongoing improvements (seeding, berm construction, ditch completion) were made.
Key data point: No quantitative measurements of leachate, water quality, or contaminant levels reported; document is qualitative site inspection with recommendations for stormwater management.
2026-02-05 · Arbor Hills Landfill · evidence · routine
Arbor Hills Landfill submitted its Second Quarter 2024 Perimeter Monitor Root Cause Analysis Investigation Report to EGLE on July 11, 2024, documenting procedures and findings for methane and hydrogen sulfide alarm investigations conducted April–May 2024 under Consent Judgment No. 2020-0593-CE. The report includes multiple root cause analyses showing no significant deficiencies found in cap, conduit, leachate systems, or compost facility operations following perimeter monitor action-level alarms.
Key data point: No specific measured temperature, CO, or gas readings stated in excerpted pages; document references action-level alarm thresholds of 40 ppm methane and 7 ppm H2S but reports no observed exceedances or defects identified during April–May 2024 investigations.
2026-02-05 · Arbor Hills Landfill · procedural · routine
This is the 2023 Third Quarter Consent Judgment status report filed by Arbor Hills Landfill, Inc. with the Michigan Department of Environment, Great Lakes, and Energy, covering vertical gas well operations, liquid level monitoring, and gas collection system improvements. The report documents ongoing infrastructure improvements to the landfill's gas extraction and monitoring systems as required under Consent Judgment No. 2020-0593-CE.
Key data point: Document is a procedural quarterly compliance filing with no specific measured temperature, CO, or other quantitative readings presented; contains only descriptions of well monitoring protocols and corrective actions.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This is the Q4 2023 Vertical Gas Collection (VGC) Well Liquid Monitoring and Management Report submitted by Arbor Hills Landfill to the Michigan Department of Environment, Great Lakes, and Energy (EGLE) in compliance with Consent Judgment No. 2020-0593-CE. The report documents liquid level monitoring, gas composition data, and operational status across multiple gas extraction wells at both the West and East sections of the landfill, with identified wells requiring corrective actions including pump maintenance and well replacement.
Key data point: Multiple wells across Arbor Hills West and East show documented operational issues including obstructions, stuck pumps, and screens exceeding 50% submerged levels; 9 wells in West section recommended for replacement by May 29, 2024; pump maintenance and evaluations ongoing at 12 wells in West section.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Tetra Tech's Q2 2024 leachate minimization review of Arbor Hills Landfill evaluates stormwater diversion, cover systems, and grading compliance with the 2022 Consent Judgment. The inspection on May 15, 2024 found cover systems in generally good condition with adequate stormwater diversion, though several areas require additional seeding and vegetative cover to prevent erosion. The report recommends minor improvements to downchutes and vegetation establishment to maintain long-term runoff performance.
Key data point: No quantitative leachate, water quality, or air quality measurements provided; document is an engineering assessment of cover condition and drainage adequacy per Consent Judgment Section 5.2(C)2.
2026-02-05 · Arbor Hills Landfill · procedural · routine
This is the Q3 2024 Consent Judgment quarterly report filed by Arbor Hills Landfill with EGLE, submitting required attachments covering leachate summaries, gas-extraction data, and analytical results for July–September 2024. The document includes leachate volume records from multiple collection points and laboratory analysis of leachate samples showing ammonia, TSS, COD, and TOC levels.
Key data point: No specific temperature, CO, or violation readings are visible in the excerpted pages. The document references Consent Judgment No. 2020-0593-CE Section 6.2 compliance but shows only leachate volumes and analytical parameters (ammonia, TSS, COD, TOC) without exceedance flags.
2026-02-05 · Arbor Hills Landfill · procedural · routine
This is the 2024 Supplemental Environmental Projects (SEP) annual report submitted by Arbor Hills Landfill to EGLE under Consent Judgment No. 2020-0593-CE, documenting compliance with three required projects: perimeter emissions monitoring (6 Scentroid stations measuring H2S and methane), a household hazardous waste facility now operational since October 2023, and vegetative buffers totaling 132 planted trees. The report includes expenditure summaries ($547,000 for monitoring, $261,000 for HHW facility operations in 2024) and certifications of project implementation.
Key data point: Perimeter emissions monitoring system installed 2022 with 6 Scentroid CTair stations on east side west of Napier Road, monitoring H2S and methane; total cumulative spend to date over $1.3 million as of 2024 annual report.
2026-02-05 · Arbor Hills Landfill · procedural · routine
This document is a site plan for Arbor Hills Landfill showing cell layout and waste placement areas, filed on February 5, 2026. The plan displays landfill cell designations (e.g., 6G, 3FM, 4x8, 2A) across the property. No regulatory violations, measurements, or substantive operational data are contained in this drawing.
Key data point: No specific factual readings or regulatory claims present; this is a structural site layout document.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This Gas Extraction Report from Arbor Hills Landfill documents temperature, gas composition, and carbon monoxide readings from multiple Wells of Interest (WOI) during July–September 2023. The report includes detailed well-by-well extraction data, pressure readings, flow rates, and monthly CO concentrations measured via Draeger tubes across the active gas extraction network. Multiple wells were abandoned and replaced during this period, with ongoing monitoring of leachate levels and pump maintenance.
Key data point: Temperature readings from multiple WOI wells ranged from 84.6°F (AHC4106A, August 2023) to 129.4°F (AH148AR3, August 2023); all measured temperatures remained below the 131°F WOI threshold. Multiple CO measurements recorded in August 2023 ranged from 0 to 50 ppm, with July and September readings mostly at or near 0 ppm.
2026-02-05 · Arbor Hills Landfill · evidence · urgent
GFL submitted its Q1 2024 HOV (Higher Operating Value) WOI (Wells of Interest) Quarterly Status Report to EGLE on April 15, 2024, documenting landfill gas monitoring data, well maintenance, and subsurface oxidation management across 16+ wells operating under elevated-temperature waivers. The report includes measured temperature readings from January through March 2024, well installation/replacement activities, and gas quality data, along with cumulative construction activities and planned Q2 upgrades.
Key data point: Well AHWW0279 measured 147.1°F on 3/27/2024 (2°F above the 145°F urgent threshold); Wells AHWW0313 and AHWW0312R measured 151°F+ in early 2024 (approved HOV waiver ceiling 155°F); multiple wells show sustained temperatures in the 105–152°F range under active HOV monitoring per Consent Judgment CJ No. 2020-0593-CE.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This is a Q4 2022 Liquid Level Report for Arbor Hills East Vertical Gas Wells, documenting leachate depths, screen submergence percentages, and sediment levels across multiple monitoring wells on a 76-page table. The report provides routine operational data on landfill leachate management and well conditions at the Arbor Hills facility (SRN N2688).
Key data point: No specific factual claim or measured violation stated; this is a data table showing leachate levels and well conditions as of Q4 2022, with no temperature, CO, or exceedance readings provided.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This is the Q2 2023 Vertical Gas Collection (VGC) Well Liquid Monitoring and Management Report for Arbor Hills Landfill, submitted under Consent Judgment No. 2020-0593-CE. The report documents liquid levels, gas composition, flow rates, and pump functionality across the landfill's gas extraction wells, identifying wells requiring corrective actions including pump maintenance, well replacement, or further evaluation.
Key data point: No specific measured temperature reading above 145F is stated in the provided pages. The document focuses on liquid level, screen submersion percentages, pump operation, and well obstruction—not thermal monitoring. Wells of Interest (WOI) are referenced but temperature data tables are not included in the excerpted sections.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Arbor Hills Landfill's Third Quarter 2024 Perimeter Monitor Root Cause Analysis Investigation Report documents the site's response to perimeter air monitoring alarm events (methane ≥40 ppm or H₂S ≥7 ppm) during July and August 2024. The report details systematic investigation procedures including back-trajectory analysis, on-site visual inspection, and corrective actions, with findings of no significant deficiencies in cap integrity, conduit pathways, compost handling, or leachate collection systems.
Key data point: No specific measured readings of methane, H₂S, or other air-quality parameters are disclosed in the keyword-matched pages; the document is a procedural alarm-response template applied to multiple weeks in Q3 2024.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Arbor Hills Landfill submitted its Q2 2024 Perimeter Monitor Root Cause Analysis Investigation Report to EGLE under Consent Judgment No. 2020-0593-CE, documenting responses to perimeter air-quality alarm events triggered in April and May 2024. The report details the site's systematic procedure for investigating methane (CH4) and hydrogen sulfide (H2S) exceedances at the 40 ppm and 7 ppm action-level thresholds, respectively. All investigations conducted during April–May 2024 found no cover concerns, no conduit issues, and no operational deficiencies in the leachate collection or compost facilities.
Key data point: Perimeter monitors triggered alarm-level events for CH4 (≥40 ppm) or H2S (≥7 ppm) on multiple dates in April–May 2024; root-cause investigations conducted April 4–7, April 9–10, May 1, May 10, and May 14, 2024 all reported 'no concerns' in cover, conduits, leachate systems, and compost facility.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Arbor Hills Landfill submitted its Q3 2023 Perimeter Monitor Root Cause Analysis Investigation Report to EGLE on October 15, 2023, documenting the protocol and findings for four perimeter monitor alarm events (July 18, 21, 27–28, and August 19, 2023). Each alarm involved methane detections at monitor MS-5, and investigations concluded with no identified deficiencies in gas collection systems, cap integrity, leachate facilities, or compost operations.
Key data point: Four perimeter monitor alarm events detected in Q3 2023 at MS-5 (July 18, July 21, July 27–28, August 19), each triggering root cause analysis per Consent Judgment 2020-0593-CE; no deficiencies identified.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This is a Q1 2024 Liquid Level Report for Arbor Hills East and West vertical gas wells, documenting leachate depths, screen submersion percentages, and well construction data across 73 pages. The document tracks routine quarterly monitoring of perforated well screens to assess groundwater and leachate levels in the gas extraction system. No temperature, carbon monoxide, or air-quality readings are present in the sampled pages.
Key data point: Document provides no single urgent factual claim; it is a routine hydrological monitoring dataset with liquid levels and screen submersion percentages at dozens of wells as of Q1 2024.
2026-02-05 · Arbor Hills Landfill · evidence · notable
This is the 2022 second semi-annual Consent Judgment compliance report (CJ 2020-0593-CE) from Arbor Hills Landfill covering 3rd and 4th quarter 2022. It documents extensive Surface Emission Monitoring (SEM) exceedances across dozens of gas wells and penetrations, with corrective actions taken to address cover integrity, seal failures, and gas collection issues. Temperature readings at several Wells of Interest (WOI) are recorded alongside methane and oxygen levels.
Key data point: WOI Well WW-207R recorded 77°F; WOI Well WW-306R recorded 129°F (both from 4Q 2022 SEM table); WOI wells WW-290 and WW-297 noted 'poor gas quality at the time of the scan' in 3Q 2022.
2026-02-05 · Arbor Hills Landfill · evidence · routine
This document is a formal action plan submitted by Arbor Hills Landfill to the Michigan Department of Environment, Great Lakes, and Energy in May 2023, pursuant to Consent Judgment No. 2020-0593-CE. It reports on a third-party engineering evaluation (conducted by Tetra Tech in March 2023) of the landfill's leachate minimization and stormwater control measures, detailing findings and recommended corrective actions for cover systems, vegetation, and drainage infrastructure. The action plan confirms completion of several maintenance tasks (stone check dams, diversion berms) and outlines a schedule for spring 2023 reseeding and repair work.
Key data point: Sparse vegetation observed on south, west, and north slopes during Q1 2023 inspection; recommended evaluation of vegetation coverage in late spring 2023 and reseeding to establish adequate cover.
2026-02-05 · Arbor Hills Landfill · evidence · urgent
A 58-page Wells of Interest (WOI) Status Report documenting subsurface gas and temperature measurements across 12–13 actively monitored wells at Arbor Hills Landfill from May–June 2023. The report shows temperature readings ranging from 54.4°F to 148.6°F, carbon monoxide levels up to 196 ppm, and valve/pump operational data. Well AHWW0313 was elevated to WOI status in June 2023 after recorded temperatures exceeded 131°F.
Key data point: Well AHWW0313 recorded measured temperatures of 145.5–148.6°F (5.5–8.6°F above the 140°F permitted limit and 0.5–8.6°F above the 145°F urgent threshold) on five dates in May–June 2023; well became WOI on June 13, 2023; CO in well AHWW0315 reached 196 ppm on 5/24/2023.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Green For Life Environmental (GFL) notifies the Michigan Department of Environment, Great Lakes, and Energy of a change in the distribution list for Arbor Hills Landfill under Consent Judgment No. 2020-0593-CE, replacing contact Tony Pelletier with Fernando Camargo as Area Landfill Director.
Key data point: No specific factual data or measurements provided; administrative notice only.
2026-02-05 · Arbor Hills Landfill · procedural · routine
Arbor Hills Landfill submitted a Consent Judgment-mandated action plan (July 1, 2022) responding to a third-party leachate minimization engineering review conducted by Weaver Consultants Group in May 2022. The plan addresses stormwater control, cover system integrity, and erosion repairs, with completion timelines ranging from July to October 2022. The review found the landfill's cover and diversion systems generally in good condition but identified minor erosion areas, standing water in the northern perimeter ditch, geomembrane damage on the temporary cap, and depressions around gas wells requiring remediation.
Key data point: No specific temperature, CO, or water-quality readings provided. Document is a procedural compliance submission detailing engineering recommendations and proposed corrective actions under Consent Judgment No. 2020-0593-CE.
2026-02-05 · Arbor Hills Landfill · evidence · routine
Tetra Tech's Q1 2024 leachate minimization review finds that Arbor Hills Landfill's grading, cover systems, and stormwater controls are generally in good condition and capable of diverting stormwater away from the operating area. The report documents ongoing final cover construction (19 acres of FML on south slope), repair of a damaged temporary cap area, and identifies minor improvements needed including seeding of sparse vegetation areas and erosion control measures. Settlement is minimal and not expected to cause grade reversal before the next quarterly survey.
Key data point: No quantitative leachate generation, water quality, or contamination readings provided; report is qualitative assessment of cover systems and drainage infrastructure.
2026-02-05 · Arbor Hills Landfill · procedural · routine
This is the 2023 Supplemental Environmental Projects (SEP) Annual Report submitted by Arbor Hills Landfill, Inc. to the Michigan Department of Environment, Great Lakes, and Energy in compliance with Consent Judgment No. 2020-0593-CE. The report documents AHL's expenditures and progress on three required SEPs: perimeter emissions monitoring (H2S and methane), a household hazardous waste facility, and vegetative buffer plantings.
Key data point: No specific operational or safety measurements provided in report. Document is a compliance filing describing SEP project status and costs ($222,000 for perimeter monitoring operations in 2023, over $800,000 cumulative; HHW facility operational since October 3, 2023).
2026-02-05 · Arbor Hills Landfill · procedural · routine
A 2023 Q1 Vertical Gas Collection (VGC) Well Monitoring and Management Report submitted to EGLE under Consent Judgment No. 2020-0593-CE. The report documents quarterly liquid level and gas monitoring at Arbor Hills Landfill, recommends well replacements and pump installations to meet the 50% open-screen performance threshold, and summarizes improvements made since the 2020 initial assessment.
Key data point: No single measured temperature, CO, or subsurface-oxidation reading provided in excerpt. Document is administrative compliance reporting on well screen submersion and pump functionality; the Temperature (Wells of Interest) data referenced in the Consent Judgment appear to be in a separate WOI report (Appendix D not shown in keyword-matched pages).
2026-02-05 · Arbor Hills Landfill · evidence · notable
Arbor Hills Landfill responded to an October 10, 2023 violation notice for odor exceedances on 6-Mile Road and Napier Road by documenting a root-cause investigation into Cell 6A emissions. The facility implemented multiple remedial measures including clay cover, gas collection piping to leachate risers, and temporary vacuum systems, claiming to have eliminated the odor source by October 11, 2023.
Key data point: Odor violations verified on 6-Mile Road between Napier Road and Crestbrook Drive (Oct 5, 2023) and Napier Road at northeast corner (Oct 5–6, 2023) in violation of R299.4433(1)(c); Cell 6A perimeter monitors indicated higher than acceptable H2S concentration limits beginning early September 2023.