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Gasoline Service Stations, Dickson, Tennessee. NPDES permit TN0080178, in force until Sep 30, 2028. Last 12 months: over a limit 3 times (last June 2026), 1 of 4 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Nitrogen, ammonia total [as N], monthly average | 5.84 mg/L | ≤ 1.7 mg/L | 244% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | < 10 mg/L | ≤ 1.7 mg/L | 488% |
| June 2026 | Nitrogen, ammonia total [as N], monthly average | 2.56 mg/L | ≤ 1.4 mg/L | 83% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.2 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Oil and grease | monthly average | ≤ 10 mg/L | all year |
| Oil and grease | daily maximum | ≤ 15 mg/L | all year |
| Toluene | daily maximum | ≤ 15 mg/L | Mar, Jun, Sep, Dec |
| Benzene | daily maximum | ≤ .51 mg/L | Mar, Jun, Sep, Dec |
| Ethylbenzene | daily maximum | ≤ 2.1 mg/L | Mar, Jun, Sep, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Jun, Sep, Dec |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Jun, Sep, Dec |
Cited limits by parameter: Tennessee's rules and the federal ones.
Same industry: the 13 Automotive Dealers and Gasoline Service Stations permits in Tennessee.
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