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Diamond Shamrock Refining Company, LP

Petroleum Refining, Sunray, Texas. NPDES permit TX0115851 expired Apr 7, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 003 form A monthly (6 values), outfall 004 form A monthly (6 values), outfall 005 form A monthly (6 values), outfall 007 form A monthly (6 values), outfall 008 form A monthly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 60 reports late

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year003
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHminimum≥ 6 SUall year004
pHmaximum≤ 9 SUall year004
Oil & Greasedaily maximum≤ 15 mg/Lall year004
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year004
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
pHminimum≥ 6 SUall year005
pHmaximum≤ 9 SUall year005
Oil & Greasedaily maximum≤ 15 mg/Lall year005
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year005
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year007
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
pHminimum≥ 6 SUall year008
pHmaximum≤ 9 SUall year008
Oil & Greasedaily maximum≤ 15 mg/Lall year008
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year008
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008

How strict are these limits?

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

Same industry: the 32 Petroleum Refining and Related Industries permits in Texas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0115851 · MCP: https://passage-data.com/mcp