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Clean Water Act discharge permit · NPDES MA0003280

CHELSEA SANDWICH, LLC, Chelsea, MA: NPDES MA0003280 discharge permit, effluent exceedances, inspections, penalties

CHELSEA SANDWICH, LLC holds NPDES permit MA0003280, which discharges to Mystic River, Chelsea River; Boston. 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 filedCHELSEA SANDWICH, LLC
Permittee as filedCHELSEA SANDWICH, LLC
NPDES IDMA0003280
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 24, 2014
Expiration dateNovember 30, 2019
AddressChelsea, MA 02150
Receiving waterMYSTIC RIVER, CHELSEA RIVER; BOSTON
SubwatershedOutlet Saugus River-Frontal Broad Sound (HUC 010900010402)
SIC5172 – Petroleum Products
Other EPA IDs (FRS)RCRA handler MAD096290044; ICIS-AIR source MA0000002511901617

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

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended63321October 31, 2023343% over the limit
Copper, total [as Cu]42018March 31, 2025634% over the limit
Benzo[b]fluoranthene41912March 31, 2025536% over the limit
Benzo[a]pyrene62510October 31, 2025206% over the limit
Benzo[a]anthracene4179April 30, 2025196% over the limit
Zinc, total [as Zn]4108August 31, 2025471% over the limit
Oil and grease194October 31, 2019467% over the limit
pH8163January 31, 2023
Benzo[k]fluoranthene4103March 31, 202592% over the limit
Indeno[1,2,3-cd]pyrene4102March 31, 202522% over the limit
Chrysene492March 31, 202543% over the limit
Nitrogen, ammonia total [as N]022October 31, 2023193% over the limit
Benzene7151March 31, 2015864% over the limit
Chlorine, total residual431September 30, 2024577% over the limit
Cyanide, total [as CN]221March 31, 202540% over the limit
BTEX121March 31, 201556% over the limit
Naphthalene7150
Dibenz[a,h]anthracene480
Xylene [mix of m+o+p]470
Ethylbenzene460
Flow rate260
Flow, total260
Toluene450
Acenaphthylene450
Acenaphthene450
Anthracene450
Fluoranthene450
Fluorene450
Phenanthrene450
Pyrene450
Benzo[ghi]perylene450
Polynuclear Aromatic Hydrocarbons [PAHs]440
Discharge event observation [Visual Monitoring]140
Salinity420
Solids, total420
Ammonia nitrogen, total, [as N] 30 day420
Cadmium, total [as Cd]420
Nickel, total [as Ni]420
Carbon, tot organic [TOC]320
Lead, total [as Pb]310
Ammonia, unionized210
Chromium, total [as Cr]210
Iron, total [as Fe]210
Phenol210
Coliform, fecal, colony forming units210
Phthalates, total210
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)210
LC50 Static 48Hr Acute Menidia210
Hydrocarbons, total petroleum110
Methyl tert-butyl ether [MTBE]010

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES MA0003280.

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 MA0003280 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit MA0003280 held by CHELSEA SANDWICH, LLC in Chelsea, MA, discharging to the MYSTIC RIVER, CHELSEA RIVER; BOSTON, with the permit listed as administratively continued and a Minor Discharger class. The page lists 16 pollutants under a numeric limit, 16 pollutants with an effluent exceedance, and a discharger class of 48.