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TA Operating LLC

Gasoline Service Stations, Knoxville, Tennessee. NPDES permit TN0065137, in force until Jun 30, 2028. Last 12 months: over a limit 3 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form G monthly (11 values)
Renewal application due: Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file: September 2026
Oct 2024 – Sep 2025: 2 values over a limit, 11 required values missing, 1 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
October 2025	Nitrogen, ammonia total [as N], daily maximum	5 mg/L	≤ 4.24 mg/L	18%
February 2026	Nitrogen, ammonia total [as N], daily maximum	9.85 mg/L	≤ 5.62 mg/L	75%
June 2026	Solids, total suspended, daily maximum	53.6 mg/L	≤ 40 mg/L	34%

Limits in force (12)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	daily maximum	≤ 40 mg/L	all year
Oil and grease, hexane extr method	daily maximum	≤ 15 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 5.62 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.24 mg/L	May–Oct
Toluene	daily maximum	≤ 1 mg/L	all year
Benzene	daily maximum	≤ .5 mg/L	all year
Ethylbenzene	daily maximum	≤ .2 mg/L	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year
Xylene [mix of m+o+p]	daily maximum	≤ .5 mg/L	all year
Oil and grease visual	value	report only (N=0;Y=1)	all year

How strict are these limits?

Xylene [mix of m+o+p], daily maximum .5 mg/L — stricter than 31% of 67 other minor industrial and other permits nationwide; 13% have the same limit
Nitrogen, ammonia total [as N], daily maximum 4.24 mg/L — stricter than 26% of 42 other minor industrial and other permits in Tennessee
Solids, total suspended, daily maximum 40 mg/L — stricter than 22% of 474 other minor industrial and other permits in Tennessee; 74% have the same limit

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

Same industry: the 13 Automotive Dealers and Gasoline Service Stations permits in Tennessee.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0065137 · MCP: https://passage-data.com/mcp