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Original Sixteen to One Mine, Inc.

Gold Ores, Alleghany, California. NPDES permit CA0081809 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 12 times (last June 2026), 1 of 2 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: form Q quarterly (52 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
14 values over a limit, 78 required values missing, 3 of 4 reports late

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

Period endingParameterReportedLimitOver by
March 2026Antimony, total recoverable, daily maximum27.7 ug/L≤ 11 ug/L152%
March 2026Antimony, total recoverable, monthly average27.7 ug/L≤ 5.6 ug/L395%
March 2026Iron, total recoverable, daily maximum4830 ug/L≤ 770 ug/L527%
March 2026Iron, total recoverable, monthly average4830 ug/L≤ 590 ug/L719%
March 2026Nickel, total recoverable, monthly average84.7 ug/L≤ 45 ug/L88%
June 2026Antimony, total recoverable, daily maximum31.6 ug/L≤ 11 ug/L187%
June 2026Antimony, total recoverable, monthly average31.6 ug/L≤ 5.6 ug/L464%
June 2026Arsenic, total recoverable, daily maximum822 ug/L≤ 22 ug/L3636%
June 2026Arsenic, total recoverable, monthly average822 ug/L≤ 10 ug/L8120%
June 2026Iron, total recoverable, daily maximum1060 ug/L≤ 770 ug/L38%
June 2026Iron, total recoverable, monthly average1060 ug/L≤ 590 ug/L80%
June 2026Nickel, total recoverable, monthly average58.8 ug/L≤ 45 ug/L31%

Limits in force (52)

ParameterStatisticLimitMonths
Specific conductanceannual average≤ 2200 umho/cmall year
Specific conductanceannual average≤ 2200 umho/cmall year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
pHminimum≥ 6.5 SUall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Arsenic, total recoverablemonthly average≤ 10 ug/Lall year
Arsenic, total recoverablemonthly average≤ 10 ug/Lall year
Arsenic, total recoverabledaily maximum≤ 22 ug/Lall year
Arsenic, total recoverabledaily maximum≤ 22 ug/Lall year
Iron, total recoverablemonthly average≤ 590 ug/Lall year
Iron, total recoverablemonthly average≤ 590 ug/Lall year
Iron, total recoverabledaily maximum≤ 770 ug/Lall year
Iron, total recoverabledaily maximum≤ 770 ug/Lall year
Nickel, total recoverablemonthly average≤ 45 ug/Lall year
Nickel, total recoverablemonthly average≤ 45 ug/Lall year
Nickel, total recoverabledaily maximum≤ 89 ug/Lall year
Nickel, total recoverabledaily maximum≤ 89 ug/Lall year
Zinc, total recoverablemonthly average≤ 750 ug/Lall year
Zinc, total recoverablemonthly average≤ 750 ug/Lall year
Zinc, total recoverabledaily maximum≤ 1500 ug/Lall year
Zinc, total recoverabledaily maximum≤ 1500 ug/Lall year
Cadmium, total recoverablemonthly average≤ 50 ug/Lall year
Cadmium, total recoverablemonthly average≤ 50 ug/Lall year
Cadmium, total recoverabledaily maximum≤ 100 ug/Lall year
Cadmium, total recoverabledaily maximum≤ 100 ug/Lall year
Lead, total recoverablemonthly average≤ 300 ug/Lall year
Lead, total recoverablemonthly average≤ 300 ug/Lall year
Lead, total recoverabledaily maximum≤ 600 ug/Lall year
Lead, total recoverabledaily maximum≤ 600 ug/Lall year
Copper, total recoverablemonthly average≤ 150 ug/Lall year
Copper, total recoverablemonthly average≤ 150 ug/Lall year
Copper, total recoverabledaily maximum≤ 300 ug/Lall year
Copper, total recoverabledaily maximum≤ 300 ug/Lall year
Antimony, total recoverablemonthly average≤ 5.6 ug/Lall year
Antimony, total recoverablemonthly average≤ 5.6 ug/Lall year
Antimony, total recoverabledaily maximum≤ 11 ug/Lall year
Antimony, total recoverabledaily maximum≤ 11 ug/Lall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Mercury, total recoverablemonthly average≤ 1 ug/Lall year
Mercury, total recoverablemonthly average≤ 1 ug/Lall year
Mercury, total recoverabledaily maximum≤ 2 ug/Lall year
Mercury, total recoverabledaily maximum≤ 2 ug/Lall year

How strict are these limits?

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

Same industry: the 5 Metal Mining permits in California.

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Your permit document is the final word. As JSON: /api/v1/permits/CA0081809 · MCP: https://passage-data.com/mcp