Martin Marietta Materials, LLC - Fort Calhoun Quarry East — NPDES permit NE0000663: limits, due date and EPA's record

NPDES permit NE0000663 · Minor NON-POTW · administratively continued, expires 2024-06-30 · EPA's file as of 2026-09-19

Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2024-06-30 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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among NE permits in EPA's filings — check your permit).

Limits in force (18)

Outfall	Parameter	Statistic	Limit	Months
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Solids, total suspended	MO AVG	<= 25 mg/L	all year
002	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
002	Hydrocarbons, total gas chromatograph	MO AVG	report only	all year
002	Hydrocarbons, total gas chromatograph	DAILY MX	report only	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	Priority pollutants scan [yes/no]	VALUE	report only	all year
004	pH	MINIMUM	>= 6.5 SU	all year
004	pH	MAXIMUM	<= 9 SU	all year
004	Solids, total suspended	MO AVG	<= 25 mg/L	all year
004	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
004	Hydrocarbons, total gas chromatograph	MO AVG	report only	all year
004	Hydrocarbons, total gas chromatograph	DAILY MX	report only	all year
004	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
004	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
004	Priority pollutants scan [yes/no]	VALUE	report only	all year