Passage Data · Check a report · Use it from your AI

Detyens Shipyard Inc

Ship Building And Repairing, Mount Pleasant, South Carolina. NPDES permit SC0033022 expired Jul 31, 2021; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (23 values), form 2 every 51 months
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 mg/Lall year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 60 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Copper, total [as Cu]monthly average≤ .0037 mg/Lall year
Copper, total [as Cu]daily maximum≤ .0058 mg/Lall year
Nickel, total [as Ni]monthly average≤ .0083 mg/Lall year
Nickel, total [as Ni]daily maximum≤ .075 mg/Lall year
Zinc, total [as Zn]monthly average≤ .086 mg/Lall year
Zinc, total [as Zn]daily maximum≤ .095 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .0075 mg/Lall year
Chlorine, total residualdaily maximum≤ .013 mg/Lall year
Enterococci30-day geometric mean≤ 35 CFU/100mLall year
Enterococcidaily maximum≤ 104 CFU/100mLall year
Coliform, fecal general30-day geometric mean≤ 14 #/100mLall year
Coliform, fecal generaldaily maximum≤ 43 #/100mLall year
Pass/Fail Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)daily maximumreport only (pass=0;fail=1)all year

How strict are these limits?

Cited limits by parameter: South Carolina's rules and the federal ones.

Same industry: the 3 Transportation Equipment permits in South Carolina.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/SC0033022 · MCP: https://passage-data.com/mcp