DEER PARK REFINING LIMITED PARNERSHIP — NPDES permit TX0004871: limits, due date and EPA's record

NPDES permit TX0004871 · Major NON-POTW · administratively continued, expires 2026-03-04 · EPA's file as of 2026-09-19

This permit expired on 2026-03-04 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

Last period with anything received: 2026-07-31. Most often over: pH (2), BOD, 5-day, 20 deg. C (1), Phenols (1).

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (276)

Outfall	Parameter	Statistic	Limit	Months
001	pH	MINIMUM	>= 6 SU	all year
001	pH	MAXIMUM	<= 9 SU	all year
001	Oil & Grease	DAILY MX	<= 15 mg/L	all year
001	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
001	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
002	pH	MINIMUM	>= 6 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Oil & Grease	DAILY MX	<= 15 mg/L	all year
002	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Mercury, total [as Hg]	DAILY MX	report only	all year
003	pH	MINIMUM	>= 6 SU	all year
003	pH	MAXIMUM	<= 9 SU	all year
003	Oil & Grease	DAILY MX	<= 15 mg/L	all year
003	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
003	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
004	pH	MINIMUM	>= 6 SU	all year
004	pH	MAXIMUM	<= 9 SU	all year
004	Oil & Grease	DAILY MX	<= 15 mg/L	all year
004	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
004	Copper, total [as Cu]	DAILY MX	report only	all year
004	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
004	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
004	Mercury, total [as Hg]	DAILY MX	report only	all year
006	pH	MINIMUM	>= 6 SU	all year
006	pH	MAXIMUM	<= 9 SU	all year
006	Oil & Grease	DAILY MX	<= 15 mg/L	all year
006	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
006	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
006	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
007	Temperature, water deg. fahrenheit	DAILY MX	<= 105 deg F	all year
007	BOD, 5-day, 20 deg. C	DAILY AV	<= 1410 lb/d	all year
007	BOD, 5-day, 20 deg. C	DAILY MX	<= 2820 lb/d	all year
007	pH	MINIMUM	>= 5 SU	all year
007	pH	MAXIMUM	<= 11 SU	all year
007	Solids, total suspended	DAILY AV	<= 1980 lb/d	all year
007	Solids, total suspended	DAILY MX	<= 2970 lb/d	all year
007	Oil & Grease	DAILY AV	<= 660 lb/d	all year
007	Oil & Grease	DAILY MX	<= 990 lb/d	all year
007	Nitrogen, total [as N]	DAILY AV	report only	all year
007	Nitrogen, total [as N]	DAILY MX	report only	all year
007	Nitrogen, ammonia total [as N]	DAILY AV	<= 500 lb/d	all year
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 1580 lb/d	all year
007	Phosphorus, total [as P]	DAILY AV	report only	all year
007	Phosphorus, total [as P]	DAILY MX	report only	all year
007	Carbon, tot organic [TOC]	DAILY AV	<= 3000 lb/d	all year
007	Carbon, tot organic [TOC]	DAILY MX	<= 6000 lb/d	all year
007	Sulfide, total [as S]	DAILY AV	<= 10 lb/d	all year
007	Sulfide, total [as S]	DAILY MX	<= 20 lb/d	all year
007	Chromium, hexavalent [as Cr]	DAILY AV	<= 2.1 lb/d	all year
007	Chromium, hexavalent [as Cr]	DAILY MX	<= 4.7 lb/d	all year
007	Chromium, total [as Cr]	DAILY AV	<= 22 lb/d	all year
007	Chromium, total [as Cr]	DAILY MX	<= 44 lb/d	all year
007	Copper, total [as Cu]	DAILY AV	<= 2.36 lb/d	all year
007	Copper, total [as Cu]	DAILY MX	<= 5.5 lb/d	all year
007	Nickel, total [as Ni]	DAILY AV	<= .59 lb/d	all year
007	Nickel, total [as Ni]	DAILY MX	<= 1.39 lb/d	all year
007	Carbon tetrachloride	DAILY AV	<= .52 lb/d	all year
007	Carbon tetrachloride	DAILY MX	<= 1.09 lb/d	all year
007	Chloroform	DAILY AV	<= .6 lb/d	all year
007	Chloroform	DAILY MX	<= 1.32 lb/d	all year
007	Toluene	DAILY AV	<= .74 lb/d	all year
007	Toluene	DAILY MX	<= 2.29 lb/d	all year
007	Benzene	DAILY AV	<= 1.06 lb/d	all year
007	Benzene	DAILY MX	<= 3.89 lb/d	all year
007	Acenaphthylene	DAILY AV	<= .63 lb/d	all year
007	Acenaphthylene	DAILY MX	<= 1.69 lb/d	all year
007	Acenaphthene	DAILY AV	<= .63 lb/d	all year
007	Acenaphthene	DAILY MX	<= 1.69 lb/d	all year
007	Acrylonitrile	DAILY AV	<= 2.75 lb/d	all year
007	Acrylonitrile	DAILY MX	<= 6.93 lb/d	all year
007	Anthracene	DAILY AV	<= .63 lb/d	all year
007	Anthracene	DAILY MX	<= 1.69 lb/d	all year
007	Benzo[b]fluoranthene	DAILY AV	<= .66 lb/d	all year
007	Benzo[b]fluoranthene	DAILY MX	<= 1.75 lb/d	all year
007	Benzo[k]fluoranthene	DAILY AV	<= .63 lb/d	all year
007	Benzo[k]fluoranthene	DAILY MX	<= 1.69 lb/d	all year
007	Benzo[a]pyrene	DAILY AV	<= .66 lb/d	all year
007	Benzo[a]pyrene	DAILY MX	<= 1.75 lb/d	all year
007	Chlorobenzene	DAILY AV	<= .43 lb/d	all year
007	Chlorobenzene	DAILY MX	<= .8 lb/d	all year
007	Chloroethane, total weight	DAILY AV	<= 2.98 lb/d	all year
007	Chloroethane, total weight	DAILY MX	<= 7.67 lb/d	all year
007	Chrysene	DAILY AV	<= .63 lb/d	all year
007	Chrysene	DAILY MX	<= 1.69 lb/d	all year
007	Diethyl phthalate	DAILY AV	<= 2.32 lb/d	all year
007	Diethyl phthalate	DAILY MX	<= 5.81 lb/d	all year
007	Dimethyl phthalate	DAILY AV	<= .54 lb/d	all year
007	Dimethyl phthalate	DAILY MX	<= 1.35 lb/d	all year
007	Ethylbenzene	DAILY AV	<= .92 lb/d	all year
007	Ethylbenzene	DAILY MX	<= 3.09 lb/d	all year
007	Fluoranthene	DAILY AV	<= .72 lb/d	all year
007	Fluoranthene	DAILY MX	<= 1.95 lb/d	all year
007	Fluorene	DAILY AV	<= .63 lb/d	all year
007	Fluorene	DAILY MX	<= 1.69 lb/d	all year
007	Hexachlorobutadiene	DAILY AV	<= .57 lb/d	all year
007	Hexachlorobutadiene	DAILY MX	<= 1.4 lb/d	all year
007	Hexachloroethane	DAILY AV	<= .6 lb/d	all year
007	Hexachloroethane	DAILY MX	<= 1.55 lb/d	all year
007	Methyl chloride [Chloromethane]	DAILY AV	<= 2.46 lb/d	all year
007	Methyl chloride [Chloromethane]	DAILY MX	<= 5.44 lb/d	all year
007	Methylene chloride	DAILY AV	<= 1.14 lb/d	all year
007	Methylene chloride	DAILY MX	<= 2.55 lb/d	all year
007	Nitrobenzene	DAILY AV	<= .77 lb/d	all year
007	Nitrobenzene	DAILY MX	<= 1.95 lb/d	all year
007	Phenanthrene	DAILY AV	<= .63 lb/d	all year
007	Phenanthrene	DAILY MX	<= 1.69 lb/d	all year
007	Pyrene	DAILY AV	<= .72 lb/d	all year
007	Pyrene	DAILY MX	<= 1.92 lb/d	all year
007	Tetrachloroethylene	DAILY AV	<= .63 lb/d	all year
007	Tetrachloroethylene	DAILY MX	<= 1.6 lb/d	all year
007	1,1-Dichloroethane	DAILY AV	<= .63 lb/d	all year
007	1,1-Dichloroethane	DAILY MX	<= 1.69 lb/d	all year
007	1,1-Dichloroethylene	DAILY AV	<= .46 lb/d	all year
007	1,1-Dichloroethylene	DAILY MX	<= .72 lb/d	all year
007	1,1,1-Trichloroethane	DAILY AV	<= .6 lb/d	all year
007	1,1,1-Trichloroethane	DAILY MX	<= 1.55 lb/d	all year
007	1,1,2-Trichloroethane	DAILY AV	<= .6 lb/d	all year
007	1,1,2-Trichloroethane	DAILY MX	<= 1.55 lb/d	all year
007	Benzo[a]anthracene	DAILY AV	<= .63 lb/d	all year
007	Benzo[a]anthracene	DAILY MX	<= 1.69 lb/d	all year
007	1,2-Dichloroethane, total weight	DAILY AV	<= 1.95 lb/d	all year
007	1,2-Dichloroethane, total weight	DAILY MX	<= 6.04 lb/d	all year
007	1,2-Dichlorobenzene	DAILY AV	<= 2.2 lb/d	all year
007	1,2-Dichlorobenzene	DAILY MX	<= 4.67 lb/d	all year
007	1,2-Dichloropropane	DAILY AV	<= 4.38 lb/d	all year
007	1,2-Dichloropropane	DAILY MX	<= 6.58 lb/d	all year
007	trans-1,2-Dichloroethylene	DAILY AV	<= .6 lb/d	all year
007	trans-1,2-Dichloroethylene	DAILY MX	<= 1.55 lb/d	all year
007	1,2,4-Trichlorobenzene	DAILY AV	<= 1.95 lb/d	all year
007	1,2,4-Trichlorobenzene	DAILY MX	<= 4.01 lb/d	all year
007	1,3-Dichloropropene, total weight	DAILY AV	<= .83 lb/d	all year
007	1,3-Dichloropropene, total weight	DAILY MX	<= 1.26 lb/d	all year
007	1,3-Dichlorobenzene	DAILY AV	<= .89 lb/d	all year
007	1,3-Dichlorobenzene	DAILY MX	<= 1.26 lb/d	all year
007	1,4-Dichlorobenzene	DAILY AV	<= .43 lb/d	all year
007	1,4-Dichlorobenzene	DAILY MX	<= .8 lb/d	all year
007	2-Chlorophenol	DAILY AV	<= .89 lb/d	all year
007	2-Chlorophenol	DAILY MX	<= 2.81 lb/d	all year
007	2-Nitrophenol	DAILY AV	<= 1.17 lb/d	all year
007	2-Nitrophenol	DAILY MX	<= 1.98 lb/d	all year
007	2,4-Dichlorophenol	DAILY AV	<= 1.12 lb/d	all year
007	2,4-Dichlorophenol	DAILY MX	<= 3.21 lb/d	all year
007	2,4-Dimethylphenol	DAILY AV	<= .52 lb/d	all year
007	2,4-Dimethylphenol	DAILY MX	<= 1.03 lb/d	all year
007	2,4-Dinitrotoluene	DAILY AV	<= 3.23 lb/d	all year
007	2,4-Dinitrotoluene	DAILY MX	<= 8.16 lb/d	all year
007	2,4-Dinitrophenol	DAILY AV	<= 2.03 lb/d	all year
007	2,4-Dinitrophenol	DAILY MX	<= 3.52 lb/d	all year
007	2,6-Dinitrotoluene	DAILY AV	<= 7.3 lb/d	all year
007	2,6-Dinitrotoluene	DAILY MX	<= 18.35 lb/d	all year
007	4-Nitrophenol	DAILY AV	<= 2.06 lb/d	all year
007	4-Nitrophenol	DAILY MX	<= 3.55 lb/d	all year
007	4,6-Dinitro-o-cresol	DAILY AV	<= 2.23 lb/d	all year
007	4,6-Dinitro-o-cresol	DAILY MX	<= 7.93 lb/d	all year
007	Naphthalene	DAILY AV	<= .63 lb/d	all year
007	Naphthalene	DAILY MX	<= 1.69 lb/d	all year
007	Di[2-ethylhexyl] phthalate [DEHP]	DAILY AV	<= 2.95 lb/d	all year
007	Di[2-ethylhexyl] phthalate [DEHP]	DAILY MX	<= 7.99 lb/d	all year
007	Di-n-butyl phthalate	DAILY AV	<= .77 lb/d	all year
007	Di-n-butyl phthalate	DAILY MX	<= 1.63 lb/d	all year
007	Vinyl chloride	DAILY AV	<= 2.98 lb/d	all year
007	Vinyl chloride	DAILY MX	<= 7.67 lb/d	all year
007	Trichloroethylene	DAILY AV	<= .6 lb/d	all year
007	Trichloroethylene	DAILY MX	<= 1.55 lb/d	all year
007	Hexachlorobenzene	DAILY AV	<= .0119 lb/d	all year
007	Hexachlorobenzene	DAILY MX	<= .0251 lb/d	all year
007	Phenols	DAILY AV	<= 12 lb/d	all year
007	Phenols	DAILY AV	<= .43 lb/d	all year
007	Phenols	DAILY MX	<= 20 lb/d	all year
007	Phenols	DAILY MX	<= .74 lb/d	all year
007	Flow, in conduit or thru treatment plant	DAILY AV	<= 9.25 MGD	all year
007	Flow, in conduit or thru treatment plant	DAILY MX	<= 14 MGD	all year
007	Enterococci	DAILY AV	report only	all year
007	Enterococci	DAILY MX	report only	all year
007	pH range excursions, > 60 minutes	MO TOTAL	<= 0 occur/mo	all year
007	pH range excursions, monthly total accum	MO TOTAL	<= 446 min	all year
007	TCDD equivalents	DAILY MX	report only	all year
008	pH	MINIMUM	>= 6 SU	all year
008	pH	MAXIMUM	<= 9 SU	all year
008	Oil & Grease	DAILY MX	<= 15 mg/L	all year
008	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
008	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
008	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
009	pH	MINIMUM	>= 6 SU	all year
009	pH	MAXIMUM	<= 9 SU	all year
009	Oil & Grease	DAILY MX	<= 15 mg/L	all year
009	Carbon, tot organic [TOC]	DAILY MX	<= 70 mg/L	all year
009	Copper, total [as Cu]	DAILY MX	report only	all year
009	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
009	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
009	Mercury, total [as Hg]	DAILY MX	report only	all year
010	BOD, 5-day, 20 deg. C	DAILY MX	<= 37 mg/L	all year
010	pH	MINIMUM	>= 6 SU	all year
010	pH	MAXIMUM	<= 9 SU	all year
010	Solids, total suspended	DAILY MX	<= 200 mg/L	all year
010	Oil & Grease	DAILY MX	<= 15 mg/L	all year
010	Nitrogen, ammonia total [as N]	DAILY MX	<= 3 mg/L	all year
010	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
010	Carbon, tot organic [TOC]	DAILY MX	<= 78 mg/L	all year
010	Sulfide, total [as S]	DAILY MX	<= .26 mg/L	all year
010	Chromium, hexavalent [as Cr]	DAILY MX	<= .06 mg/L	all year
010	Chromium, total [as Cr]	DAILY MX	<= .57 mg/L	all year
010	Phenols	DAILY MX	<= .26 mg/L	all year
010	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
010	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
107	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
107	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
107	Enterococci	DAILY AV	<= 168 CFU/100mL	all year
107	Enterococci	DAILY MX	<= 500 CFU/100mL	all year
108	BOD, 5-day, 20 deg. C	DAILY MX	<= 37 mg/L	all year
108	BOD, 5-day, 20 deg. C	DAILY MX	<= 12528 lb/d	all year
108	pH	MINIMUM	>= 6 SU	all year
108	pH	MAXIMUM	<= 9 SU	all year
108	Solids, total suspended	DAILY MX	<= 200 mg/L	all year
108	Solids, total suspended	DAILY MX	<= 67711 lb/d	all year
108	Oil & Grease	DAILY MX	<= 15 mg/L	all year
108	Oil & Grease	DAILY MX	<= 5078 lb/d	all year
108	Nitrogen, ammonia total [as N]	DAILY MX	<= 3 mg/L	all year
108	Nitrogen, ammonia total [as N]	DAILY MX	<= 1015 lb/d	all year
108	Carbon, tot organic [TOC]	DAILY MX	<= 78 mg/L	all year
108	Carbon, tot organic [TOC]	DAILY MX	<= 26407 lb/d	all year
108	Sulfide, total [as S]	DAILY MX	<= .26 mg/L	all year
108	Sulfide, total [as S]	DAILY MX	<= 88 lb/d	all year
108	Chromium, hexavalent [as Cr]	DAILY MX	<= .06 mg/L	all year
108	Chromium, hexavalent [as Cr]	DAILY MX	<= 20 lb/d	all year
108	Chromium, total [as Cr]	DAILY MX	<= .57 mg/L	all year
108	Chromium, total [as Cr]	DAILY MX	<= 193 lb/d	all year
108	Phenols	DAILY MX	<= .26 mg/L	all year
108	Phenols	DAILY MX	<= 88 lb/d	all year
108	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
108	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
207	Flow, in conduit or thru treatment plant	DAILY AV	report only	all year
207	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
TX7	Whole effluent toxicity - retest #1	7 DA MIN	report only	all year
TX7	Whole effluent toxicity - retest #1	7 DA MIN	report only	all year
TX7	Whole effluent toxicity - retest #1	MO AV MN	report only	all year
TX7	Whole effluent toxicity - retest #1	MO AV MN	report only	all year
TX7	Whole effluent toxicity - retest #2	7 DA MIN	report only	all year
TX7	Whole effluent toxicity - retest #2	7 DA MIN	report only	all year
TX7	Whole effluent toxicity - retest #2	MO AV MN	report only	all year
TX7	Whole effluent toxicity - retest #2	MO AV MN	report only	all year
TX7	Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	7 DA MIN	report only	all year
TX7	Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	MO AV MN	report only	all year
TX7	Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia	7 DA MIN	report only	all year
TX7	Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia	MO AV MN	report only	all year
TX7	NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7 DA MIN	report only	all year
TX7	NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	MO AV MN	report only	all year
TX7	NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia	7 DA MIN	report only	all year
TX7	NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia	MO AV MN	report only	all year
TX7	NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7 DA MIN	report only	all year
TX7	NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	MO AV MN	report only	all year
TX7	NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	7 DA MIN	report only	all year
TX7	NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	MO AV MN	report only	all year
TX7	Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7 DA MIN	report only	all year
TX7	Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	MO AV MN	report only	all year
TX7	Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	7 DA MIN	report only	all year
TX7	Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	MO AV MN	report only	all year
TX7	LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7 DA MIN	report only	all year
TX7	LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	MO AV MN	report only	all year
TX7	LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia	7 DA MIN	report only	all year
TX7	LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia	MO AV MN	report only	all year
TX7	LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	7 DA MIN	report only	all year
TX7	LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	MO AV MN	report only	all year
TX7	LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia	7 DA MIN	report only	all year
TX7	LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia	MO AV MN	report only	all year
TXG	Whole effluent toxicity - retest #1	SINGSAMP	report only	all year
TXG	Whole effluent toxicity - retest #2	SINGSAMP	report only	all year
TXG	LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	SINGSAMP	report only	all year
TXG	LC50 Pass/Fail Static 24Hr Acute Menidia menidia	SINGSAMP	report only	all year