Midwest Railcar Repair, Inc. — NPDES permit SD0028436: limits, due date and EPA's record

Railroads, Line-Haul Operating, Brandon, South Dakota. NPDES permit SD0028436 expired Sep 30, 2021; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (52)

Parameter	Statistic	Limit	Months
Temperature, water deg. fahrenheit	30-day average	report only (deg F)	all year
Temperature, water deg. fahrenheit	daily maximum	≤ 95 deg F	all year
Conductivity	30-day average	report only (umho/cm)	all year
Conductivity	daily maximum	≤ 4375 umho/cm	all year
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	all year
BOD, 5-day, 20 deg. C	30-day average	≤ 22 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 56 mg/L	all year
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 26 mg/L	all year
Solids, total suspended	daily maximum	≤ 58 mg/L	all year
Oil and grease, hexane extr method	30-day average	≤ 8.8 mg/L	all year
Oil and grease, hexane extr method	daily maximum	≤ 10 mg/L	all year
Nitrogen, total [as N]	30-day average	report only (mg/L)	all year
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year
Nitrogen, nitrate total [as N]	30-day average	≤ 50 mg/L	all year
Nitrogen, nitrate total [as N]	daily maximum	≤ 88 mg/L	all year
Phosphorus, total [as P]	30-day average	report only (mg/L)	all year
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year
Hardness, total [as CaCO3]	30-day average	report only (mg/L)	all year
Hardness, total [as CaCO3]	daily maximum	report only (mg/L)	all year
Selenium, total recoverable	30-day average	≤ 4.6 ug/L	all year
Selenium, total recoverable	daily maximum	≤ 13.27 ug/L	all year
Nickel, total recoverable	30-day average	≤ 60.71 ug/L	all year
Nickel, total recoverable	daily maximum	≤ 659.84 ug/L	all year
Silver total recoverable	daily maximum	≤ 6.46 ug/L	all year
Zinc, total recoverable	30-day average	≤ 137.94 ug/L	all year
Zinc, total recoverable	daily maximum	≤ 165.22 ug/L	all year
Cadmium, total recoverable	30-day average	≤ .28 ug/L	all year
Cadmium, total recoverable	daily maximum	≤ 2.99 ug/L	all year
Lead, total recoverable	30-day average	≤ 3.07 ug/L	all year
Lead, total recoverable	daily maximum	≤ 100.13 ug/L	all year
Chromium, total recoverable	30-day average	≤ 11 ug/L	all year
Chromium, total recoverable	daily maximum	≤ 16 ug/L	all year
Copper, total recoverable	30-day average	≤ 10.47 ug/L	all year
Copper, total recoverable	daily maximum	≤ 19.69 ug/L	all year
Fluoranthene	daily maximum	≤ .076 mg/L	all year
Phenanthrene	daily maximum	≤ .34 mg/L	all year
Flow, total	monthly total	report only (Mgal)	all year
Toxicity [acute], Ceriodaphnia dubia	daily maximum	< 1 tox acute	all year
Toxicity [acute], Ceriodaphnia dubia	daily maximum	< 1 tox acute	all year
Toxicity [acute], Ceriodaphnia dubia	daily maximum	< 1 tox acute	all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]	daily maximum	< 1 tox acute	all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]	daily maximum	< 1 tox acute	all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]	daily maximum	< 1 tox acute	all year
Solids, total dissolved	30-day average	report only (mg/L)	all year
Solids, total dissolved	daily maximum	≤ 4375 mg/L	all year
Mercury, total recoverable	30-day average	≤ .77 ug/L	all year
Mercury, total recoverable	daily maximum	≤ 1.4 ug/L	all year
Flow, process wastewater	30-day average	report only (gal/d)	all year
Flow, process wastewater	daily maximum	report only (gal/d)	all year
Oil and grease visual	daily maximum	< 1 N=0;Y=1	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/SD0028436 · MCP: https://passage-data.com/mcp