Martin Marietta Materials, Inc - Fort Calhoun West Quarry

NPDES permit NE0138185 · Minor NON-POTW · expired, expires 2024-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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 expired: 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

0values over a limit

0required values missing, on 0 form(s)

0of 14 forms filed late

Last period with anything received: 2026-06-30.

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).

Outfall 001, form M (Effluent Monthly): every 3 month(s), 2 values
Outfall 001, form P (Effluent Permit Term): files every 60 months; EPA's filings do not show which
Outfall 001, form Q (Effluent Quarterly): files for periods ending in Mar, Jun, Sep, Dec

Limits in force (9)

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

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states