TAI Oak Hall LLC

NPDES permit VA0090875 · Minor NON-POTW · effective, expires 2026-11-30 · 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.

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

2values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Oxygen, dissolved [DO] (2).

Reporting

Reports are due about 10 days after each monitoring period ends (the most common figure among VA permits in EPA's filings — check your permit).

Limits in force (25)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 10 mg/L all year
001Solids, total suspendedWKLY AVG <= 15 mg/L all year
001Solids, total suspendedMO AVG <= .38 kg/d all year
001Solids, total suspendedWKLY AVG <= .57 kg/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG <= 3 mg/L all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG <= 4.5 mg/L all year
001Nitrogen, Kjeldahl, total [as N]MO AVG <= .11 kg/d all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG <= .17 kg/d all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG <= .01 MGD (alert) all year
001Flow, in conduit or thru treatment plantMAXIMUM report only (alert) all year
001Chlorine, total residualMO AVG <= .008 mg/L all year
001Chlorine, total residualWKLY AVG <= .01 mg/L all year
001Chlorine, total residualMINIMUM >= .6 mg/L all year
001E. coliMO AVG <= 126 #/100mL all year
001Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 15 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= .38 kg/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= .57 kg/d 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