Clean Water Act discharge permit · NPDES MTG310020

SKELLY AND TEXACO OIL LEASES, Kevin, MT: NPDES MTG310020 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
2Pollutants with an effluent exceedance

SKELLY AND TEXACO OIL LEASES, held by CHELIN LLC, holds NPDES permit MTG310020, which discharges to Unnamed Coulee. EPA’s file records it issued October 30, 2015 and expiring April 30, 2020. 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	SKELLY AND TEXACO OIL LEASES
Permittee as filed	CHELIN LLC
NPDES ID	MTG310020
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	October 30, 2015
Expiration date	April 30, 2020
Address	Kevin, MT 59454
Receiving water	UNNAMED COULEE
SIC	1311 – Crude Petroleum And Natural Gas

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

9Pollutants on file
5Under a numeric limit
6With a violation of any kind
2With 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 dissolved	0	28	8	June 30, 2009	50% over the limit
Oil & Grease	0	24	4	December 31, 2003	33% over the limit
Flow rate	0	22	0
Sulfate	0	14	0
Conductivity	2	2	0
Sulfate, total [as SO4]	2	1	0
Flow rate	1	0	0
Oil and grease, hexane extr method	1	0	0
Solids, total dissolved [TDS]	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

3Single-event violations

Date	What EPA recorded	Agency
October 17, 2023	Management Practice Violations - Failure to Maintain Records	ST6
October 17, 2023	Permit Violations - CWA §308 Failure to submit required permit application information	ST6
October 17, 2023	Monitoring Violations - Improper Analysis or Lab Error	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.

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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 MTG310020 there.

Nearby on the register

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

This public-records page covers NPDES permit MTG310020, held by CHELIN LLC for the SKELLY AND TEXACO OIL LEASES facility in Kevin, MT, which discharges to Unnamed Coulee. The permit is administratively continued and carries a Minor Discharger class, with 9 pollutants on file, 5 under a numeric limit, and 2 with an effluent exceedance.