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Tesoro Alaska Petroleum Company

Petroleum Refining, major discharger, Kenai, Alaska. NPDES permit AK0000841 expired Jun 30, 2022; its limits still apply. Last 12 months: over a limit 3 times (last March 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (36 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Phenolics, total recoverable, monthly average< .67 lb/d≤ .62 lb/d8%
March 2026BOD, 5-day, 20 deg. C, daily maximum369.5 lb/d≤ 314 lb/d18%
March 2026pH, minimum5.8 SU≥ 6 SU—

Limits in force (38)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Conductivitydaily maximumreport only (umho/cm)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 168 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 314 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 136 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedmonthly average≤ 223 lb/dJun–Sep
Solids, total suspendeddaily maximum≤ 217 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendeddaily maximum≤ 349 lb/dJun–Sep
Nitrogen, ammonia total [as N]monthly average≤ 65 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 143 lb/dall year
Cyanide, total [as CN]maximumreport only (ug/L)all year
Sulfide, total [as S]monthly average≤ .91 lb/dall year
Sulfide, total [as S]daily maximum≤ 1.98 lb/dall year
Chromium, hexavalent [as Cr]monthly average≤ .1 lb/dall year
Chromium, hexavalent [as Cr]daily maximum≤ .19 lb/dall year
Chromium, total [as Cr]monthly average≤ 1.29 lb/dall year
Chromium, total [as Cr]daily maximum≤ 2.43 lb/dall year
Copper, total recoverablemonthly average≤ 73 ug/Lall year
Copper, total recoverabledaily maximum≤ 219 ug/Lall year
Oil and greasemonthly average≤ 38 lb/dall year
Oil and greasedaily maximum≤ 67 lb/dall year
Phenolics, total recoverablemonthly average≤ .62 lb/dall year
Phenolics, total recoverabledaily maximum≤ 1.34 lb/dall year
Hydrocarbons, aromaticdaily 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
Hydrocarbon, aqueousdaily maximumreport only (ug/L)all year
Sulfide-hydrogen sulfide [undissociated]daily maximumreport only (ug/L)all year
Mercury, total [as Hg]daily maximumreport only (ng/L)all year
Chemical Oxygen Demand [COD]monthly average≤ 1084 lb/dall year
Chemical Oxygen Demand [COD]daily maximum≤ 2002 lb/dall year
pH range excursions, > 60 minutestotalreport only (occur/mo)all year
pH range excursions, monthly total accummonthly total≤ 446 minall year
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all year
Toxicity, Chronicmaximumreport only (toxic)all year
Toxicity, Chronicmaximumreport only (toxic)all year

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

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Your permit document is the final word. As JSON: /api/v1/permits/AK0000841 · MCP: https://passage-data.com/mcp