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Chevron Environmental Management Company

Petroleum Bulk Stations & Terminals, Lockport, Illinois. NPDES permit IL0002305, in force until Sep 30, 2029. Last 12 months: over a limit once (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 002 form 0 monthly (12 values), outfall 003 form 0 monthly (17 values), outfall 003 form Q quarterly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 28 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
September 2026Iron, total [as Fe], 30-day average2.7 mg/L≤ 2 mg/L35%

Limits in force (60)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Nitrogen, ammonia total [as N]30-day average≤ 1.2 mg/LMar–May002
Nitrogen, ammonia total [as N]30-day average≤ .9 mg/LJun–Aug002
Nitrogen, ammonia total [as N]30-day average≤ 1.2 mg/LSep, Oct002
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LJan, Feb, Nov, Dec002
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LMar–May002
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LJun–Aug002
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LSep, Oct002
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LJan, Feb, Nov, Dec002
Nitrogen, ammonia total [as N]weekly average≤ 2.3 mg/LJun–Aug002
Iron, total [as Fe]30-day average≤ 2 mg/Lall year002
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year002
Oil and grease30-day average≤ 15 mg/Lall year002
Oil and greasedaily maximum≤ 30 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Mercury, total [as Hg]30-day averagereport only (ng/L)all year002
Mercury, total [as Hg]daily maximumreport only (ng/L)all year002
pHmonthly minimum≥ 6 SUall year003
pHmonthly maximum≤ 9 SUall year003
Solids, total suspended30-day average≤ 25 mg/Lall year003
Solids, total suspendeddaily maximum≤ 50 mg/Lall year003
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LMar–May003
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LJun–Aug003
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LSep, Oct003
Nitrogen, ammonia total [as N]30-day average≤ 6.3 mg/LJan, Feb, Nov, Dec003
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LMar–May003
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJun–Aug003
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LSep, Oct003
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Nov, Dec003
Nitrogen, ammonia total [as N]weekly average≤ 9.8 mg/LMar–May003
Nitrogen, ammonia total [as N]weekly average≤ 6.1 mg/LJun–Aug003
Nitrogen, ammonia total [as N]weekly average≤ 9.8 mg/LSep, Oct003
Iron, total [as Fe]30-day average≤ 2 mg/Lall year003
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year003
Oil and grease30-day average≤ 15 mg/Lall year003
Oil and greasedaily maximum≤ 30 mg/Lall year003
Acenaphthylenedaily maximumreport only (mg/L)all year003
Acenaphthenedaily maximumreport only (mg/L)all year003
Anthracenedaily maximumreport only (mg/L)all year003
Benzo[k]fluoranthenedaily maximumreport only (mg/L)all year003
Benzo[a]pyrenedaily maximumreport only (mg/L)all year003
Chrysenedaily maximumreport only (mg/L)all year003
Fluoranthenedaily maximumreport only (mg/L)all year003
Fluorenedaily maximumreport only (mg/L)all year003
Indeno[1,2,3-cd]pyrenedaily maximumreport only (mg/L)all year003
Phenanthrenedaily maximumreport only (mg/L)all year003
Pyrenedaily maximumreport only (mg/L)all year003
Benzo[ghi]perylenedaily maximumreport only (mg/L)all year003
Benzo[a]anthracenedaily maximumreport only (mg/L)all year003
Dibenz[a,h]anthracenedaily maximumreport only (mg/L)all year003
Naphthalenedaily maximumreport only (mg/L)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Mercury, total [as Hg]30-day averagereport only (ng/L)all year003
Mercury, total [as Hg]daily maximumreport only (ng/L)all year003
3,4-Benzofluoranthenedaily maximumreport only (mg/L)all year003
BOD, carbonaceous [5 day, 20 C]30-day average≤ 20 mg/Lall year003
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/Lall year003

How strict are these limits?

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

Same industry: the 34 Wholesale Trade — Nondurable Goods permits in Illinois.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0002305 · MCP: https://passage-data.com/mcp