Clean Water Act discharge permit · NPDES MTG490023

KEMBEL SITE, Billings, MT: NPDES MTG490023 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
4Pollutants under a numeric limit
0Pollutants with an effluent exceedance

KEMBEL SITE, held by WARREN TRANSPORT INC, holds NPDES permit MTG490023, which discharges to Yellowstone River. EPA’s file records it issued December 5, 2019 and expiring October 31, 2024. 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	KEMBEL SITE
Permittee as filed	WARREN TRANSPORT INC
NPDES ID	MTG490023
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
Issued	December 5, 2019
Expiration date	October 31, 2024
Address	Billings, MT 59105
Receiving water	YELLOWSTONE RIVER
Subwatershed	Yellowstone River-Sevenmile Creek (HUC 100700070403)
SIC	1442 – Construction Sand And Gravel

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

6Pollutants on file
4Under a numeric limit
6With a violation of any kind
0With 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
pH	2	4
Solids, total suspended	2	4
Flow rate	0	4
Oil and grease, hexane extr method	1	2
Oil and grease visual	1	2
Duration of discharge	0	2

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG490023.

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

4Single-event violations

Date	What EPA recorded	Agency
June 6, 2024	Monitoring Violations - Improper Analysis or Lab Error	ST6
June 6, 2024	Monitoring Violations - Invalid/Unrepresentative Sample	ST6
June 6, 2024	Monitoring Violations - Frequency of Sampling Violation	ST6
June 6, 2024	WW Storm Water Non-Construction - Failure to Maintain Records	ST6

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.

Watch this permit

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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 MTG490023 there.

Nearby on the register

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

This EPA public-records page covers NPDES permit MTG490023 for the KEMBEL SITE in Billings, MT, held by WARREN TRANSPORT INC, with a permit status of administratively continued, a Minor discharger class, and coverage under a general permit. The permit was issued December 5, 2019 and expired October 31, 2024, and the page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with 6 pollutants on file.