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Former WKI Facility Groundwater Remediation System

Services, Massillon, Ohio. NPDES permit OH0003956, in force until Mar 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (28 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (28)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly average≤ 27.8 deg Call year
Temperature, water deg. centigradedaily maximum≤ 29.4 deg Call year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year
Oil and grease, hexane extr methoddaily maximum≤ 33 kg/dall year
Carbon, tot organic [TOC]monthly averagereport only (mg/L)all year
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year
Copper, dissolved [as Cu]monthly averagereport only (ug/L)all year
Copper, dissolved [as Cu]daily maximumreport only (ug/L)all year
Methylene chloridemonthly averagereport only (ug/L)all year
Methylene chloridedaily maximumreport only (ug/L)all year
1,1-Dichloroethanemonthly averagereport only (ug/L)all year
1,1-Dichloroethanedaily maximumreport only (ug/L)all year
1,1-Dichloroethylenemonthly averagereport only (ug/L)all year
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year
1,1,1-Trichloroethanemonthly averagereport only (ug/L)all year
1,1,1-Trichloroethanedaily maximumreport only (ug/L)all year
Vinyl chloridemonthly averagereport only (ug/L)all year
Vinyl chloridedaily maximumreport only (ug/L)all year
Trichloroethylenemonthly averagereport only (ug/L)all year
Trichloroethylenedaily maximumreport only (ug/L)all 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
Halogen, total organicmonthly averagereport only (ug/L)all year
Halogen, total organicdaily maximumreport only (ug/L)all year
Acetonemonthly averagereport only (ug/L)all year
Acetonedaily maximumreport only (ug/L)all year

How strict are these limits?

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

Same industry: the 7 Miscellaneous Services permits in Ohio.

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0003956 · MCP: https://passage-data.com/mcp