Imerys Kaolin Inc. — NPDES permit GA0030848: limits, due date and EPA's record

NPDES permit GA0030848 · Minor NON-POTW · effective, expires 2027-04-30 · EPA's file as of 2026-09-19

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

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (42)

Outfall	Parameter	Statistic	Limit	Months
002	Turbidity	DAILY AV	<= 50 NTU	all year
002	Turbidity	DAILY MX	<= 75 NTU	all year
002	pH	MINIMUM	>= 6 SU	all year
002	pH	MAXIMUM	<= 8.5 SU	all year
002	Solids, total suspended	DAILY AV	<= 22 mg/L	all year
002	Solids, total suspended	DAILY MX	<= 33 mg/L	all year
002	Oil & Grease	DAILY AV	<= 10 mg/L	all year
002	Oil & Grease	DAILY MX	<= 15 mg/L	all year
002	Nitrogen, total [as N]	DAILY AV	report only	all year
002	Nitrogen, total [as N]	DAILY MX	report only	all year
002	Nitrogen, organic total [as N]	DAILY AV	report only	all year
002	Nitrogen, organic total [as N]	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY AV	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Nitrogen, Kjeldahl, total [as N]	DAILY AV	report only	all year
002	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
002	Nitrite + Nitrate total [as N]	DAILY AV	report only	all year
002	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	DAILY AV	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	Cadmium, total [as Cd]	DAILY AV	<= .0009 mg/L	all year
002	Cadmium, total [as Cd]	DAILY MX	<= .0014 mg/L	all year
002	Cadmium, total [as Cd]	DAILY AV	<= .01 lb/d	all year
002	Cadmium, total [as Cd]	DAILY MX	<= .017 lb/d	all year
002	Copper, total [as Cu]	DAILY AV	report only	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Copper, total [as Cu]	DAILY AV	report only	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Zinc, total [as Zn]	DAILY AV	<= .089 mg/L	all year
002	Zinc, total [as Zn]	DAILY MX	<= .091 mg/L	all year
002	Zinc, total [as Zn]	DAILY AV	<= 1.07 lb/d	all year
002	Zinc, total [as Zn]	DAILY MX	<= 1.1 lb/d	all year
002	Selenium, total [as Se]	DAILY AV	<= .005 mg/L	all year
002	Selenium, total [as Se]	DAILY MX	<= .008 mg/L	all year
002	Selenium, total [as Se]	DAILY AV	<= .038 lb/d	all year
002	Selenium, total [as Se]	DAILY MX	<= .056 lb/d	all year
002	Phosphate, ortho [as P]	DAILY AV	report only	all year
002	Phosphate, ortho [as P]	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	LC50 Static 96Hr Acute Ceriodaphnia	MINIMUM	>= 100 %	all year
002	LC50 Static 96Hr Acute Pimephales	MINIMUM	>= 100 %	all year