Cheyenne Renewable Diesel Company LLC.

NPDES permit WY0000442 · Major NON-POTW · effective, expires 2028-03-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 53 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among WY permits in EPA's filings — check your permit).

Limits in force (53)

OutfallParameterStatisticLimitMonths
003Temperature, water deg. centigradeINST MAX <= 30 deg C all year
003BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
003pHINST MIN >= 6.5 SU all year
003pHINST MAX <= 9 SU all year
003Solids, total suspendedMO AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspendedMO AVG report only all year
003Nitrogen, ammonia total [as N]MO AVG <= 2.09 mg/L all year
003Nitrogen, ammonia total [as N]DAILY MX <= 20.86 mg/L all year
003Sulfide, total [as S]MO AVG report only all year
003Sulfide, total [as S]DAILY MX report only all year
003Zinc, dissolved [as Zn]DAILY MX report only all year
003DurationMO TOTAL report only all year
003Sulfide-hydrogen sulfide [undissociated]MO AVG report only all year
003Sulfide-hydrogen sulfide [undissociated]DAILY MX report only all year
003FlowMX MO AV report only all year
003FlowDAILY AV report only all year
003Flow, process wastewaterMO AVG <= .5 MGD all year
003Flow, process wastewaterDAILY MX report only all year
003Produced water, oil and greaseDAILY MX <= 10 mg/L all year
003Pass/Fail Static 48Hr Acute Ceriodaphnia dubia4C <= 0 pass=0;fail=1 all year
003Pass/Fail Static 96 Hr Acute Pimephales Promelas9D <= 0 pass=0;fail=1 all year
003Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7E <= 0 pass=0;fail=1 all year
003Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7E <= 0 pass=0;fail=1 all year
008pHINST MIN >= 6.5 SU all year
008pHINST MAX <= 9 SU all year
008Solids, total suspendedMO AVG report only all year
008Solids, total suspendedDAILY MX report only all year
008Solids, total suspendedDAILY MX report only all year
008Solids, total suspendedMO AVG report only all year
008Carbon, tot organic [TOC]DAILY MX <= 110 mg/L all year
008DurationMO TOTAL report only all year
008FlowMO AVG report only all year
008FlowDAILY MX report only all year
008Produced water, oil and greaseDAILY MX <= 10 mg/L all year
008Pass/Fail Static 48Hr Acute Ceriodaphnia dubia4C <= 0 pass=0;fail=1 all year
008Pass/Fail Static 96 Hr Acute Pimephales Promelas9D <= 0 pass=0;fail=1 all year
009pHINST MIN >= 6.5 SU all year
009pHINST MAX <= 9 SU all year
009Solids, total suspendedMO AVG report only all year
009Solids, total suspendedDAILY MX report only all year
009Solids, total suspendedDAILY MX report only all year
009Solids, total suspendedMO AVG report only all year
009Carbon, tot organic [TOC]DAILY MX <= 110 mg/L all year
009DurationMO TOTAL report only all year
009FlowMO AVG report only all year
009FlowDAILY MX report only all year
009Produced water, oil and greaseDAILY MX <= 10 mg/L all year
009Pass/Fail Static 48Hr Acute Ceriodaphnia dubia4C <= 0 pass=0;fail=1 all year
009Pass/Fail Static 96 Hr Acute Pimephales Promelas9D <= 0 pass=0;fail=1 all year
POTWFlow, process wastewaterMO TOTAL report only all year
SUMSolids, total suspendedANNL AVG <= 262 lb/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