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DWR Inspections
Inspection Details
Site ID
Parent Site
Location
County
EFO
5741
Water Authority of Dickson County - Fairview STP
7223 CCC Road
Williamson
Nashville
Inspection Details
Inspection Number
100485
Site ID
5741
Permit Number
TN0062332
Inspection date
3/9/2022
Inspection type
Compliance Sampling (CSI)
Status
Immediately Corrected During Inspection
Notes
Plant upgraded since previous inspection. New headworks, nutrient removal basins (anaerobic and anoxic zones), swap from chlorine to UV disinfection. CBOD blanks no longer depleting. Some effluent violations, primarily associated with unusual influent events resulting in high influent BOD, TSS, and ammonia. Such an event was occurring during the inspection and appears to happen in late winter/early spring. System has engaged in influent and collection system sampling, has not determined source or cause. Not re-weighing TSS. Effluent is clear, no visual impact to receiving stream, and white precipitate noted previously from dechlorination (CAPTOR) no longer present after switch to UV. Sampling results, ammonia is the only exceedance:
pH 7.19 SU
D.O. 8.54 mg/L
e coli 1 CFU
Ammonia 19.2 mg/L
Phosphorus 0.862 mg/L
CBOD 8.97 mg/L
Set. Solids <0.222 mL/L
TSS <10 mg/L