9VAC25-790-960. Influent and effluent sampling

A. Sampling tests and frequency. Table C lists the typical recommended minimum sampling program schedules for all sewage treatment works (STW). B. STW effluent tests and frequency of effluent testing and frequency of other sampling for a treatment works will be provided in the VPDES permit or the VPA permit. TABLE C. TYPICAL SAMPLING PROGRAMS FOR SEWAGE TREATMENT WORKS. TABLE C. TYPICAL SAMPLING PROGRAMS FOR SEWAGE TREATMENT WORKS. PLANT SIZE >2.01 MGD 1.0-2.0 MGD 0.101-0.999 MGD 0.401-0.1 MGD 0.0011-0.04 MGD PLANT SIZE >2.01 MGD 1.0-2.0 MGD 0.101-0.999 MGD 0.401-0.1 MGD 0.0011-0.04 MGD Flow Totalizing, Indicating & Recording Totalizing, Indicating & Recording Totalizing, Indicating & Recording Totalizing, Indicating & Recording Estimate Flow Totalizing, Indicating & Recording Totalizing, Indicating & Recording Totalizing, Indicating & Recording Totalizing, Indicating & Recording Estimate BOD 5, TSS, TKN 24- HC 1/ Day 24- HC 5 Days/ Wk 8-HC 3 Days/ Wk 4-HC 1 Day/ Wk Grab 1/month BOD 5, TSS, TKN 24- HC 1/ Day 24- HC 5 Days/ Wk 8-HC 3 Days/ Wk 4-HC 1 Day/ Wk Grab 1/month Total Nitrogen* Total Phosphorus* 24- HC 1/ Week 24- HC 1/ Week 8-HC 1/ 2 Weeks 4-HC 1/ Month Grab 1/month Total Nitrogen* Total Phosphorus* 24- HC 1/ Week 24- HC 1/ Week 8-HC 1/ 2 Weeks 4-HC 1/ Month Grab 1/month TRC, Contact tank** Grab 1/2 Hr 4/Day at 4 Hr.Intervals 3/Day at 4 Hr.Intervals 3/Day at 4 Hr.Intervals Grab 1/Day TRC, Contact tank** Grab 1/2 Hr 4/Day at 4 Hr.Intervals 3/Day at 4 Hr.Intervals 3/Day at 4 Hr.Intervals Grab 1/Day Fecal Coliform** Grab 1/Day 10am-4pm Grab 5 Days/Wk 10am-4pm Grab 3 Days/Wk 10am-4pm Grab 1/Week 10am-4pm Grab 1/Month 10am-4pm Fecal Coliform** Grab 1/Day 10am-4pm Grab 5 Days/Wk 10am-4pm Grab 3 Days/Wk 10am-4pm Grab 1/Week 10am-4pm Grab 1/Month 10am-4pm pH, DO, TRC Effluent Grab 1/Day Grab 1/Day Grab 1/Day Grab 1/Day Grab 1/Day pH, DO, TRC Effluent Grab 1/Day Grab 1/Day Grab 1/Day Grab 1/Day Grab 1/Day WQS Parameters (Toxics) 1/8,24 HC or 1/month 1/8,24 HC or 1/month 1/8, 8HC or 1/month 1/8, 4HC or 1/month Grab 1/month WQS Parameters (Toxics) 1/8,24 HC or 1/month 1/8,24 HC or 1/month 1/8, 8HC or 1/month 1/8, 4HC or 1/month Grab 1/month