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Clean Water Act discharge permit · NPDES COG315157

RTD TUNNEL 16 GTF, Denver County, CO: NPDES COG315157 discharge permit, effluent exceedances, inspections, penalties

RTD TUNNEL 16 GTF, held by Regional Transportation District, holds NPDES permit COG315157, which discharges to Storm Sewer To South Platte River. EPA’s file records it issued February 9, 2006 and expiring October 31, 2010. 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 filedRTD TUNNEL 16 GTF
Permittee as filedRegional Transportation District
NPDES IDCOG315157
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedFebruary 9, 2006
Expiration dateOctober 31, 2010
AddressDenver County, CO 80222
Receiving waterSTORM SEWER TO SOUTH PLATTE RIVER
Receiving water impaired303(D) Listed
Subwatershed101900020904 (HUC 101900020904)

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

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
Selenium, potentially dissolvd06432August 31, 20201,328% over the limit
Chloroform88827May 31, 2014743% over the limit
Methylene chloride43021September 30, 20109% over the limit
Uranium, total04516August 31, 20201,111% over the limit
Tetrachloroethylene0397November 30, 2019128% over the limit
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia4115June 30, 20070% over the limit
LC50 Static Renewal 96Hr Acute Pimephales promelas4115June 30, 20070% over the limit
Lead, dissolved [as Pb]6511March 31, 2009100% over the limit
Arsenic, total recoverable0321February 29, 202065% over the limit
Bromoform6301January 31, 200954% over the limit
Iron, dissolved [as Fe]0301April 30, 202021% over the limit
Flow, in conduit or thru treatment plant8211October 31, 20184% over the limit
Lead, potentially dissolvd451September 30, 2008160% over the limit
1,2,4-Trichlorobenzene8530
1,1,2-Trichloroethane8520
1,2-Dichloropropane8520
1,2-Dichloroethane8500
Carbon tetrachloride8490
Ethylbenzene10380
Toluene10360
Trichloroethene10360
Benzene10350
Naphthalene10350
Silver, potentially dissolved0320
Copper, potentially dissolved0320
Vinyl chloride6310
Bromodichloromethane6310
1,1,1-Trichloroethane6290
1,3-Dichlorobenzene6290
Oil and grease visual4290
Iron, total recoverable0290
Molybdenum, total [as Mo]0290
Chlorobenzene6280
1,1,2,2-Tetrachloroethane6280
1,2-Dichlorobenzene6280
1,4-Dichlorobenzene6280
Dibromochloromethane6260
pH8180
Solids, total suspended8180
Total volatile priority pollutants0180
Base neutrals & acid [Method 625], total0180
Metals, total0180
Xylene [mix of m+o+p]8150
Oil and grease290
Nitrate nitrogen, dry weight030
Lead, total recoverable030
Chlorodibromomethane030
Arsenic, potentially dissolved020
E. coli020
Bromodichloroethane200

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 COG315157.

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 COG315157 there.

Nearby on the register

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

What this page shows

This public-records page covers the Clean Water Act NPDES discharge permit COG315157 for RTD TUNNEL 16 GTF in Denver County, CO, held by Regional Transportation District, with a minor discharger class and an administratively continued status. The page lists 13 pollutants under a numeric limit and 13 pollutants with an effluent exceedance, out of 50 pollutants on the permit.