SILVI CONCRETE OF CHESTER CO LLC

NPDES permit NJ0004251 · Minor NON-POTW · effective, expires 2030-12-31 · EPA's file as of 2026-09-26

Keep this permit as a site — opens New site at EPA's facility point (39.281425, -75.004789); you set the radius.

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.

These are the last limits EPA's file holds for this permit, from an earlier version of it (version 2 in EPA's file): its current version carries none yet. Read your permit: a renewal can change them.

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

0values over a limit

0required values missing, on 0 form(s)

1of 4 forms filed late

Last period with anything received: 2025-12-31.

Reporting

Reports are due about 26 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Outfall 002, form A: every 1 month(s), 13 values

How strict are these limits?

Each concentration limit against the same limit in comparable permits. Where it appears more than once, its strictest value.

Oxygen demand, chem. [high level] [COD], daily maximum 50 mg/L — stricter than 97% of 340 other minor industrial and other permits nationwide; 2% have the same limit
Solids, total suspended, monthly average 25 mg/L — stricter than 77% of 53 other minor industrial and other permits in New Jersey; 4% have the same limit
Solids, total suspended, daily maximum 45 mg/L — stricter than 57% of 73 other minor industrial and other permits in New Jersey; 4% have the same limit
pH, monthly minimum at least 5 SU — stricter than 0% of 1707 other minor industrial and other permits nationwide
Hydrocarbons, in H2O, IR, CC14 extractible chromatograph, daily maximum 15 mg/L — stricter than 0% of 52 other minor industrial and other permits in New Jersey; 96% have the same limit
pH, monthly maximum 9 SU — stricter than 0% of 1701 other minor industrial and other permits nationwide; 98% have the same limit
Hydrocarbons, in H2O, IR, CC14 extractible chromatograph, monthly average 10 mg/L — stricter than 0% of 47 other minor industrial and other permits in New Jersey; 100% have the same limit

Limits in force (13)

Outfall	Parameter	Statistic	Limit	Months
002	Oxygen demand, chem. [high level] [COD]	monthly average	report only	all year
002	Oxygen demand, chem. [high level] [COD]	daily maximum	<= 50 mg/L	all year
002	pH	monthly minimum	>= 5 SU	all year
002	pH	monthly maximum	<= 9 SU	all year
002	Solids, total suspended	monthly average	<= 25 mg/L	all year
002	Solids, total suspended	daily maximum	<= 45 mg/L	all year
002	Hydrocarbons, in H2O, IR, CC14 extractible chromatograph	monthly average	<= 10 mg/L	all year
002	Hydrocarbons, in H2O, IR, CC14 extractible chromatograph	daily maximum	<= 15 mg/L	all year
002	Flow, in conduit or thru treatment plant	monthly average	report only	all year
002	Flow, in conduit or thru treatment plant	daily maximum	report only	all year
002	Duration of discharge	monthly total	report only	all year
002	Flow, total	monthly total	report only	all year
002	Flow, total	monthly maximum	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