{"permit":"SC0024970","name":"C.G. MATHEWSUSAF SHAW AIR FORCE BASE","state":"SC","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/SC0024970"},"about":[{"label":"What it is","text":"Federal facility · Railroads, Line-Haul Operating (EPA's industry listing)"},{"label":"Where","text":"Sumter, South Carolina","href":"https://www.openstreetmap.org/?mlat=33.9706&mlon=-80.4917#map=14/33.9706/-80.4917"},{"label":"Last 12 months","text":"No values over a limit. 1 required value not reported. 1 of 27 reports filed late"},{"label":"Permit","text":"Expired May 31, 2008; its limits still apply until a new permit is issued, and EPA still expects the reports"}],"renewal_due":null,"renewal_check":{"offered_because":"permit_expired","application_due":"2007-12-03","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/SC0024970#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-09-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"002","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"instantaneous minimum","qualifier":">=","value":"6","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"0021"},{"outfall":"002","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":"<=","value":"15","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"0021"},{"outfall":"002","parameter":"BOD, 5-day, 20 deg. 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