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GCO Ltd

Construction Machinery, Cortland, Ohio. NPDES permit OH0064301, in force until Dec 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (5 values), outfall 002 form A monthly (5 values), outfall 602 form A monthly (21 values)
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 37 reports late

Limits in force (37)

ParameterStatisticLimitMonthsOutfall
Flow ratemonthly averagereport only (gal/d)all year001
Flow ratedaily maximumreport only (gal/d)all year001
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Sep, Dec001
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/LMar, Jun, Sep, Dec001
Flow ratemonthly averagereport only (gal/d)all year002
Flow ratedaily maximumreport only (gal/d)all year002
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Sep, Dec002
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec002
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/LMar, Jun, Sep, Dec002
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588
Flow ratemonthly averagereport only (gal/d)all year602
Flow ratedaily maximumreport only (gal/d)all year602
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar, Jun, Sep, Dec602
pHdaily minimum≥ 6.5 SUMar, Jun, Sep, Dec602
pHdaily maximum≤ 9 SUMar, Jun, Sep, Dec602
Solids, total suspendedweekly maximum≤ 45 mg/LMar, Jun, Sep, Dec602
Solids, total suspendedmonthly average≤ .074 kg/dMar, Jun, Sep, Dec602
Solids, total suspendedweekly maximum≤ .11 kg/dMar, Jun, Sep, Dec602
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/LSep602
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun, Sep602
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LMar, Dec602
Nitrogen, ammonia total [as N]weekly maximum≤ 2.25 mg/LJun, Sep602
Nitrogen, ammonia total [as N]weekly maximum≤ 4 mg/LMar, Dec602
Nitrogen, ammonia total [as N]monthly average≤ .0037 kg/dJun, Sep602
Nitrogen, ammonia total [as N]monthly average≤ .0074 kg/dMar, Dec602
Nitrogen, ammonia total [as N]weekly maximum≤ .0055 kg/dJun, Sep602
Nitrogen, ammonia total [as N]weekly maximum≤ .0098 kg/dMar, Dec602
Turbidity [severity]monthly averagereport only (severity)all year602
Turbidity [severity]daily maximumreport only (severity)all year602
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLJun, Sep602
E. coli, MTEC-MFweekly geometric mean≤ 284 MPN/100mLJun, Sep602
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMar, Jun, Sep, Dec602
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/LMar, Jun, Sep, Dec602
BOD, carbonaceous [5 day, 20 C]monthly average≤ .025 kg/dMar, Jun, Sep, Dec602
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ .037 kg/dMar, Jun, Sep, Dec602

How strict are these limits?

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

Same industry: the 17 Industrial and Commercial Machinery and Computer Equipment permits in Ohio.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0064301 · MCP: https://passage-data.com/mcp