Clean Water Act discharge permit · NPDES MER05C100

DICAPERL THOMASTON (CHEMROCK), Thomaston, ME: NPDES MER05C100 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

DICAPERL THOMASTON (CHEMROCK), held by DICAPERL MINERALS CORP., holds NPDES permit MER05C100, which discharges to Unnamed Stream. EPA’s file records it issued August 21, 2012 and expiring April 25, 2016.

DICAPERL THOMASTON (CHEMROCK), Thomaston, Maine: Coverage under a general permit MER05C100, held by DICAPERL MINERALS CORP.; Industrial stormwater; Administratively continued (past its expiration date and still in force until reissued); issued August 21, 2012, term to April 25, 2016; discharges to unnamed stream.

Maine holds 348 Industrial stormwater coverages of this permit type in EPA’s file; 270 were issued before MER05C100.

Coverages issued nearest MER05C100

April 11, 2012: DOUG GOTT & SONS INC., Southwest Harbor, MER05C091, held by DOUG GOTT & SONS, INC.
August 17, 2012: OSTERMAN PROPANE LLC/DOWNEAST ENERGY, Hallowell, MER05C096, held by SNOW FLAKE HOLDINGS
August 17, 2012: RAILROAD SQUARE, Yarmouth, MER05C097, held by SNOW FLAKE HOLDINGS
August 17, 2012: OSTERMAN PROPANE LLC/DOWNEAST ENERGY, Mount Vernon, MER05C098, held by SNOW FLAKE HOLDINGS
August 17, 2012: OSTERMAN PROPANE LLC/DOWNEAST ENERGY, Kennebunk, MER05C099, held by SNOW FLAKE HOLDINGS
August 27, 2012: LEN POULIN INC, Winslow, MER05B921, held by LEN POULIN, INC.
September 11, 2012: GREENBUSH CDD LANDFILL AND TRANSFER STATION, Greenbush, MER05C101, held by GREENBUSH TOWN OF
October 30, 2012: BOISE STRUCTURAL SOLUTIONS, Saco, MER05C103, held by BOISE CASCADE BUILDING MATERIALS DISTRIBUTION, L.L.C.
February 28, 2013: MAINE AVIATION CORPORATION, Portland, MER05C111
February 28, 2013: AUBURN ASPHALT, LLC, Auburn, MER05C113, held by AUBURN ASPHALT LLC

DICAPERL THOMASTON (CHEMROCK) among its neighbors

EPA’s permit file holds 7 discharge permits in the Weskeag River subwatershed (HUC 010500021906), MER05C100 among them. Its county holds 36, 2 of them major permits; MER05C100 is a minor permit.

Other permits in the Weskeag River subwatershed (HUC 010500021906)

CENTRAL MAINE & QUEBEC RAILWAY US INC (ROCKLAND STATION GROUNDS), Rockland: MER05C201, minor permit, permit term to April 25, 2016
DEAD RIVER COMPANY - ROCKLAND, Rockland: MER05C195, minor permit, discharging to Marsh Stream, permit term to April 25, 2016
FISHER ENGINEERING, Rockland: MER05B343, minor permit, permit term to April 25, 2016
ROCKLAND PLANT, Rockland: MER05B185, minor permit, discharging to Marsh Brook, permit term to April 25, 2016
ROCKLAND SOLID WASTE FACILITY, Rockland: MER05B658, minor permit, discharging to Marsh Brook, permit term to April 25, 2016
UPS - ROCKLAND, Rockland: MER05B539, minor permit, permit term to April 25, 2016

What the register holds for DICAPERL THOMASTON (CHEMROCK): its NPDES ID, its permit type and status, its dates, its address in Thomaston, Maine, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MER05C100.

Identity

Facility as filed	DICAPERL THOMASTON (CHEMROCK)
Permittee as filed	DICAPERL MINERALS CORP.
NPDES ID	MER05C100
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	August 21, 2012
Expiration date	April 25, 2016
Address	Thomaston, ME 04861
Receiving water	unnamed stream
Subwatershed	Weskeag River (HUC 010500021906)
SIC	3295 – Minerals, Ground Or Treated
Other EPA IDs (FRS)	ICIS-AIR source ME0000002301300330

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES MER05C100.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MER05C100.

Inspections

EPA’s inspection file holds no inspection for NPDES MER05C100.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MER05C100.

Watch this permit

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Nearby on the register

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

The DICAPERL THOMASTON (CHEMROCK) storm water industrial permit is one of 15 such permits in Knox County, this one included, and it is among 7 NPDES permits in the Weskeag River subwatershed. Of the 15 Knox County storm water industrial permits, 0.0% have a violation on file, and this permit has none of the 0 pollutants with an effluent exceedance or the 0 pollutants under a numeric limit.