Clean Water Act discharge permit · NPDES AR0050474

CORESLAB STRUCTURES (ARK), INC., Conway, AR: NPDES AR0050474 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
7Pollutants under a numeric limit
5Pollutants with an effluent exceedance

CORESLAB STRUCTURES (ARK), INC. holds NPDES permit AR0050474, which discharges to Trib,Stone Dam Cr,Lk Conway,Palarm Cr, Arkansas R. EPA’s file records it issued October 26, 2016 and expiring October 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	CORESLAB STRUCTURES (ARK), INC.
Permittee as filed	CORESLAB STRUCTURES (ARK), INC.
NPDES ID	AR0050474
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	October 26, 2016
Expiration date	October 31, 2021
Address	Conway, AR 72034
Receiving water	TRIB,STONE DAM CR,LK CONWAY,PALARM CR, ARKANSAS R
Receiving water impaired	303(D) Listed

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

8Pollutants on file
7Under a numeric limit
6With a violation of any kind
5With 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	2	9	9	February 28, 2021	47% over the limit
pH	2	6	4	April 30, 2016
Oxygen demand, chem. [low level] [COD]	2	5	3	May 31, 2016	21% over the limit
Oil & Grease	2	3	1	June 30, 2023	1% over the limit
Temperature, water deg. fahrenheit	0	2	1	June 30, 2010	9% over the limit
Flow, in conduit or thru treatment plant	2	2	0
Nitrogen, ammonia total [as N]	2	0	0
Nitrite + Nitrate total [as N]	2	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 AR0050474.

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 AR0050474 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act NPDES permit AR0050474 held by CORESLAB STRUCTURES (ARK), INC. in Conway, AR, which is administratively continued after its October 31, 2021 expiration date. The page lists 7 pollutants on file, 5 of them under a numeric limit, and 6 with a violation, with the permit's receiving water TRIB,STONE DAM CR,LK CONWAY,PALARM CR, ARKANSAS R.