Clean Water Act discharge permit · NPDES MA0001091
CHELSEA EASTERN AVE TERMINAL, Chelsea, MA: NPDES MA0001091 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 47Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
CHELSEA EASTERN AVE TERMINAL, held by GULF OIL - CHELSEA, holds NPDES permit MA0001091, which discharges to Chelsea River; Boston Harbor Ws. EPA’s file records it issued September 24, 2014 and expiring November 30, 2019. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CHELSEA EASTERN AVE TERMINAL |
|---|---|
| Permittee as filed | GULF OIL - CHELSEA |
| NPDES ID | MA0001091 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 24, 2014 |
| Expiration date | November 30, 2019 |
| Address | Chelsea, MA 02150 |
| Receiving water | CHELSEA RIVER; BOSTON HARBOR WS |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Outlet Saugus River-Frontal Broad Sound (HUC 010900010402) |
| SIC | 5171 – Petroleum Bulk Stations & Terminals |
| Other EPA IDs (FRS) | RCRA handler MAD000846337; ICIS-AIR source MA0000002511900483 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 48Pollutants on file
- 47Under a numeric limit
- 24With a violation of any kind
- 10With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 37 | 25 | August 31, 2022 | 287% over the limit |
| pH | 6 | 53 | 21 | October 31, 2025 | |
| Copper, total [as Cu] | 4 | 5 | 5 | March 31, 2026 | 72% over the limit |
| Benzo[a]pyrene | 6 | 9 | 3 | March 31, 2026 | 5,780% over the limit |
| Benzene | 6 | 8 | 2 | March 31, 2026 | 370% over the limit |
| Oil and grease | 1 | 8 | 2 | September 30, 2011 | 122% over the limit |
| Flow rate | 1 | 46 | 1 | August 31, 2012 | 0% over the limit |
| Benzo[b]fluoranthene | 4 | 5 | 1 | March 31, 2026 | 150% over the limit |
| Benzo[k]fluoranthene | 4 | 5 | 1 | March 31, 2026 | 57% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 1 | 1 | October 31, 2024 | 29% over the limit |
| Flow, total | 1 | 6 | 0 | ||
| Naphthalene | 6 | 5 | 0 | ||
| Methyl tert-butyl ether [MTBE] | 1 | 5 | 0 | ||
| Toluene | 4 | 4 | 0 | ||
| Chrysene | 4 | 4 | 0 | ||
| Ethylbenzene | 4 | 4 | 0 | ||
| Indeno[1,2,3-cd]pyrene | 4 | 4 | 0 | ||
| Benzo[a]anthracene | 4 | 4 | 0 | ||
| Dibenz[a,h]anthracene | 4 | 4 | 0 | ||
| Xylene [mix of m+o+p] | 4 | 4 | 0 | ||
| Ethanol | 1 | 4 | 0 | ||
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 2 | 1 | 0 | ||
| LC50 Static 48Hr Acute Menidia | 2 | 1 | 0 | ||
| Discharge event observation [Visual Monitoring] | 1 | 1 | 0 | ||
| Salinity | 4 | 0 | 0 | ||
| Solids, total | 4 | 0 | 0 | ||
| Ammonia nitrogen, total, [as N] 30 day | 4 | 0 | 0 | ||
| Carbon, tot organic [TOC] | 4 | 0 | 0 | ||
| Cadmium, total [as Cd] | 4 | 0 | 0 | ||
| Lead, total [as Pb] | 4 | 0 | 0 | ||
| Nickel, total [as Ni] | 4 | 0 | 0 | ||
| Zinc, total [as Zn] | 4 | 0 | 0 | ||
| Acenaphthylene | 4 | 0 | 0 | ||
| Acenaphthene | 4 | 0 | 0 | ||
| Anthracene | 4 | 0 | 0 | ||
| Fluoranthene | 4 | 0 | 0 | ||
| Fluorene | 4 | 0 | 0 | ||
| Phenanthrene | 4 | 0 | 0 | ||
| Pyrene | 4 | 0 | 0 | ||
| Benzo[ghi]perylene | 4 | 0 | 0 | ||
| Chlorine, total residual | 4 | 0 | 0 | ||
| Ammonia, unionized | 2 | 0 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Phenol | 2 | 0 | 0 | ||
| Vinyl chloride | 2 | 0 | 0 | ||
| tert-Butyl alcohol [TBA] | 2 | 0 | 0 | ||
| Coliform, fecal general | 2 | 0 | 0 | ||
| Ethylbenzene | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MA0001091.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MA0001091 there.
Nearby on the register
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- Every permit record in Chelsea, A to Z
- Discharge permits in Massachusetts
- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.