Non-Compliance
TRI Reporter
Clean Air Act
Clean Water Act
RCRA
HEMLOCK SEMICONDUCTOR OPERATIONS LLC
Quick Summary
- •Released 6,709 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
12334 GEDDES RD., P.O. BOX 80
HEMLOCK, MI 48626
View on map ↗ - County
- SAGINAW County
- Industry
- Manufacturing
- NAICS (North American Industry Classification)
- 327992
- Inspections
- 12 · last Aug 12, 2025
- Total Penalties
- $0 · last Oct 16, 2000
- Registry ID
- 110000407783
How This Compares
#174
of 692 TRI reporters in MI
#4,650
of 16,877 TRI reporters in Manufacturing
Ranked by most recent year's total TRI releases.
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
2
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
1
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
3
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2024)
-32% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 7,337 | — |
| 2016 | 8,370 | +14% |
| 2017 | 6,709 | -20% |
| 2018 | 6,701 | -0% |
| 2019 | 296 | -96% |
| 2020 | 898 | +203% |
| 2021 | 5,139 | +472% |
| 2022 | 28,558 | +456% |
| 2023 | 1,253 | -96% |
| 2024 | 4,966 | +296% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 264,494 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 4,704 | 4,704 | — | — | — | |
| Hydrogen fluoride | 182 | 182 | — | — | — | |
| Nitric acid | 80 | 80 | — | — | — |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 164,723 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,008 | 1,008 | — | — | — | |
| Hydrogen fluoride | 168 | 168 | — | — | — | |
| Nitric acid | 77 | 77 | — | — | — |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 134,133 | |
| Chlorodifluoromethane (HCFC-22) | 27,441 | 27,441 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 894 | 894 | — | — | — | |
| Hydrogen fluoride | 179 | 179 | — | — | 528 | |
| Nitric acid | 44 | 44 | — | — | — |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 92,302 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 4,945 | 4,945 | — | — | — | |
| Hydrogen fluoride | 170 | 170 | — | — | — | |
| Nitric acid | 24 | 24 | — | — | — |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 147,358 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 696 | 696 | — | — | — | |
| Hydrogen fluoride | 171 | 171 | — | — | — | |
| Nitric acid | 31 | 31 | — | — | — |
2019
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Chlorodifluoromethane (HCFC-22) | 296 | 296 | — | — | — |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 159,343 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 3,871 | 3,871 | — | — | — | |
| Chlorodifluoromethane (HCFC-22) | 2,652 | 2,652 | — | — | — | |
| Hydrogen fluoride | 140 | 140 | — | — | 1,921 | |
| Nitric acid | 38 | 38 | — | — | — |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 133,439 | |
| Chlorodifluoromethane (HCFC-22) | 4,260 | 4,260 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2,292 | 2,292 | — | — | — | |
| Hydrogen fluoride | 118 | 118 | — | — | — | |
| Nitric acid | 39 | 39 | — | — | — |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 103,950 | |
| Chlorodifluoromethane (HCFC-22) | 6,728 | 6,728 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,448 | 1,448 | — | — | — | |
| Hydrogen fluoride | 154 | 154 | — | — | — | |
| Nitric acid | 40 | 40 | — | — | — |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | — | 184,886 | |
| Chlorodifluoromethane (HCFC-22) | 4,454 | 4,454 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2,664 | 2,664 | — | — | — | |
| Hydrogen fluoride | 169 | 169 | — | — | — | |
| Nitric acid | 50 | 50 | — | — | — |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|---|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | — | — | 238,045 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | — | — | — | 686,030 |
| Hydrogen fluoride | — | — | — | 222,189 |
| Nitric acid | — | — | — | 268,826 |
Transfers to Publicly-Owned Treatment Works (POTWs)
Toxic chemicals transferred to municipal wastewater treatment plants during the most recent TRI reporting year. Quantities in pounds.
| Chemical | Transferred (lbs) | POTW |
|---|---|---|
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 264,494 | SAGINAW TWP WWTP, SAGINAW |
| Hydrogen fluoride | — | SAGINAW TWP WWTP, SAGINAW |
| Nitric acid | — | SAGINAW TWP WWTP, SAGINAW |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| rcra | ID and Listing of HW: General | Aug 12, 2025 | Jan 16, 2026 | Resolved |
| rcra | Standards for Universal Waste Management: Standards for Large Quantity Handlers | Aug 12, 2025 | Jan 16, 2026 | Resolved |
| caa | FRV | Oct 3, 2024 | — | Open |
| caa | FRV | Mar 11, 2024 | — | Open |
| rcra | Standards for Universal Waste Management: Standards for Large Quantity Handlers | Aug 24, 2022 | Aug 25, 2022 | Resolved |
| caa | FRV | Nov 10, 2021 | — | Open |
| cwa | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | Jul 9, 2021 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 31, 2020 | — | Open |
| cwa | Permit Violations - Discharge Without a Valid Permit | Mar 4, 2020 | — | Open |
| cwa | Permit Violations - Discharge Without a Valid Permit | Feb 28, 2020 | — | Open |
| cwa | Permit Violations - Discharge Without a Valid Permit | Feb 14, 2020 | — | Open |
| cwa | Schedule Event reported late | Mar 31, 2014 | — | Open |
| cwa | Schedule Event unachieved and not reported | Mar 31, 2014 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 31, 2014 | — | Open |
| cwa | Schedule Event unachieved but reported | Mar 31, 2014 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 1, 2013 | — | Open |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Aug 19, 2008 | Sep 19, 2008 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jul 7, 1997 | Aug 25, 1997 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jun 9, 1992 | Aug 25, 1997 | Resolved |
| rcra | Land Disposal Restrictions: General | Apr 14, 1987 | Aug 19, 1987 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Apr 14, 1987 | Aug 19, 1987 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.03 | +29% | Feb 2022 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +14% | Jan 2022 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.03 | +32% | Dec 2021 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.03 | +32% | Nov 2021 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.03 | +29% | Oct 2021 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.03 | +25% | Sep 2021 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +21% | Jul 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.04 | +5% | Dec 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.04 | +32% | Nov 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.14 mg/L | 0.04 | +268% | Oct 2020 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.03 | +36% | May 2020 | Open |
| Copper, total [as Cu] | DMR, Limited - Overdue | 0.04 mg/L | 0.03 | +36% | May 2020 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +9% | Apr 2020 | Open |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +7% | Jul 2019 | Open |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +7% | May 2019 | Open |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +7% | Apr 2019 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.51 mg/L | 0.04 | +1,242% | Feb 2018 | Open |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.03 | +4% | Oct 2016 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
Notice of Violation
Clean Air Act
· Case 3604152231 · Oct 3, 2024
Notice of Violation
Clean Air Act
· Case 3603946107 · Mar 11, 2024
Notice of Violation
Clean Air Act
· Case 3602903089 · Nov 10, 2021
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-MID095395216-001 · Sep 12, 2008
Administrative - Formal
· Case 05-2001-0138 · Oct 16, 2000
$5,000
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-MID095395216-002 · Jul 7, 1997
Other facilities in SAGINAW County, MI
STAR OF THE WEST MILLING CO
FRANKENMUTH, MI
· Manufacturing
GLASTENDER INC
SAGINAW, MI
· Manufacturing
MEANS INDUSTRIES INC
SAGINAW, MI
· Manufacturing
GFL-SAGINAW
SAGINAW, MI
MI DEPT/TRANSPORTATION BRIDGE (BO1-3,BO1-4 - 73062)
SAGINAW, MI
· Construction