C.G. Mathewsusaf Shaw Air Force Base — NPDES permit SC0024970: limits, due date and EPA's record

Federal facility (Railroads, Line-Haul Operating), Sumter, South Carolina. NPDES permit SC0024970 expired May 31, 2008; its limits still apply. Last 12 months: no values over a limit, 1 required value missing, 1 of 27 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (46)

Parameter	Statistic	Limit	Months	Outfall
Oxygen, dissolved [DO]	instantaneous minimum	≥ 6 mg/L	all year	002
BOD, 5-day, 20 deg. C	monthly average	≤ 15 mg/L	all year	002
BOD, 5-day, 20 deg. C	daily maximum	≤ 30 mg/L	all year	002
pH	instantaneous minimum	≥ 6 SU	all year	002
pH	instantaneous maximum	≤ 8.5 SU	all year	002
Solids, total suspended	monthly average	≤ 30 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	002
Nitrogen, ammonia total [as N]	monthly average	≤ 1.81 mg/L	Jan, Feb, Nov, Dec	002
Nitrogen, ammonia total [as N]	monthly average	≤ 1.13 mg/L	Mar–Oct	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 3.62 mg/L	Jan, Feb, Nov, Dec	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 2.26 mg/L	Mar–Oct	002
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	002
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	≤ 1.2 MGD	all year	002
Chlorine, total residual	monthly average	≤ .5 mg/L	all year	002
Chlorine, total residual	daily maximum	≤ 1 mg/L	all year	002
Coliform, fecal general	30-day geometric mean	≤ 200 #/100mL	all year	002
Coliform, fecal general	daily maximum	≤ 400 #/100mL	all year	002
pH	minimum	≥ 6 SU	all year	007
pH	maximum	≤ 8.5 SU	all year	007
Oil and grease, hexane extr method	monthly average	≤ 10 mg/L	all year	007
Oil and grease, hexane extr method	daily maximum	≤ 15 mg/L	all year	007
Carbon, tot organic [TOC]	daily maximum	≤ 110 mg/L	all year	007
Copper, total [as Cu]	daily maximum	report only (ug/L)	all year	007
Lead, total [as Pb]	daily maximum	report only (ug/L)	all year	007
Methyl tert-butyl ether [MTBE]	daily maximum	report only (ug/L)	all year	007
Toluene	daily maximum	report only (ug/L)	all year	007
Benzene	daily maximum	report only (ug/L)	all year	007
Ethylbenzene	daily maximum	report only (ug/L)	all year	007
Naphthalene	daily maximum	report only (ug/L)	all year	007
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	007
Xylene [mix of m+o+p]	daily maximum	report only (ug/L)	all year	007
Pass/Fail Static 48Hr Acute Ceriodaphnia dubia	daily maximum	report only (pass=0;fail=1)	all year	007
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	02A
BOD, 5-day, 20 deg. C	daily maximum	report only (mg/L)	all year	02A
pH	instantaneous minimum	≥ 6 SU	all year	02A
pH	instantaneous maximum	≤ 8.5 SU	all year	02A
Solids, total suspended	monthly average	≤ 30 mg/L	all year	02A
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	02A
Tetrachloroethylene	monthly average	≤ 5 ug/L	all year	02A
Tetrachloroethylene	daily maximum	≤ 10 ug/L	all year	02A
Trichloroethylene	monthly average	≤ 5 ug/L	all year	02A
Trichloroethylene	daily maximum	≤ 10 ug/L	all year	02A
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	02A
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	02A

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/SC0024970 · MCP: https://passage-data.com/mcp