Smyrna Ready Mix Concrete, LLC — NPDES permit AL0083259: limits, due date and EPA's record

NPDES permit AL0083259 · Minor NON-POTW · effective, expires 2031-07-31 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Chlorine, total residual (2), Selenium, total [as Se] (2), pH (1).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (55)

Outfall	Parameter	Statistic	Limit	Months
001	pH	DAILY MN	report only	all year
001	pH	DAILY MX	report only	all year
001	Solids, total suspended	DAILY MX	report only	all year
001	Oil & Grease	DAILY MX	<= 15 mg/L	all year
001	Iron, total [as Fe]	DAILY MX	report only	all year
001	Manganese, total [as Mn]	DAILY MX	report only	all year
001	Methyl tert-butyl ether [MTBE]	DAILY MX	report only	all year
001	Toluene	DAILY MX	report only	all year
001	Benzene	DAILY MX	report only	all year
001	Ethylbenzene	DAILY MX	report only	all year
001	Naphthalene	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Xylene [mix of m+o+p]	DAILY MX	report only	all year
002	Oxygen, dissolved [DO]	DAILY MN	>= 6 mg/L	all year
002	pH	DAILY MN	>= 6 SU	all year
002	pH	DAILY MX	<= 8.5 SU	all year
002	Solids, total suspended	MO AVG	report only	all year
002	Solids, total suspended	DAILY MX	<= 50 mg/L	all year
002	Oil & Grease	MO AVG	report only	all year
002	Oil & Grease	DAILY MX	<= 15 mg/L	all year
002	Nitrogen, ammonia total [as N]	MO AVG	<= 2.4 mg/L	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.6 mg/L	all year
002	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Apr, May, Jun, Jul, Aug, Sep
002	Nitrite + Nitrate total [as N]	DAILY MX	report only	Apr, May, Jun, Jul, Aug, Sep
002	Phosphorus, total [as P]	MO AVG	report only	all year
002	Phosphorus, total [as P]	DAILY MX	<= 1 mg/L	all year
002	Iron, total [as Fe]	MO AVG	report only	all year
002	Iron, total [as Fe]	DAILY MX	report only	all year
002	Manganese, total [as Mn]	MO AVG	report only	all year
002	Manganese, total [as Mn]	DAILY MX	report only	all year
002	Thallium, total [as Tl]	MO AVG	<= .274 ug/L	all year
002	Thallium, total [as Tl]	DAILY MX	<= .411 ug/L	all year
002	Selenium, total [as Se]	MO AVG	<= .005 mg/L	all year
002	Selenium, total [as Se]	DAILY MX	<= .02 mg/L	all year
002	Methyl tert-butyl ether [MTBE]	MO AVG	report only	all year
002	Methyl tert-butyl ether [MTBE]	DAILY MX	report only	all year
002	Toluene	MO AVG	report only	all year
002	Toluene	DAILY MX	<= 8732 ug/L	all year
002	Benzene	MO AVG	report only	all year
002	Benzene	DAILY MX	<= 15.5 ug/L	all year
002	Ethylbenzene	MO AVG	report only	all year
002	Ethylbenzene	DAILY MX	<= 1244 ug/L	all year
002	Naphthalene	MO AVG	report only	all year
002	Naphthalene	DAILY MX	<= 620 ug/L	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Chlorine, total residual	MO AVG	<= .011 mg/L	all year
002	Chlorine, total residual	DAILY MX	<= .019 mg/L	all year
002	Toxicity [chronic], Ceriodaphnia dubia	SINGSAMP	<= 0 pass=0;fail=1	all year
002	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	SINGSAMP	<= 0 pass=0;fail=1	all year
002	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
002	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 15 mg/L	all year
002	Xylene [mix of m+o+p]	MO AVG	report only	all year
002	Xylene [mix of m+o+p]	DAILY MX	report only	all year