9VAC25-790-970. Operational testing and control

A. Minimum tests and frequency. Table D-l contains the typical minimum sampling and testing program for operational control of treatment works greater than 40,000 gallons per day. B. Sampling instructions. The following sampling instructions should be followed when taking samples: 1. When samples are taken for BOD 5 , COD, volatile suspended solids, and suspended solids on influent and effluent streams, they should be composite samples. 2. All other samples should be grab samples. TABLE D-1. RECOMMENDED OPERATIONAL AND CONTROL TESTING. TABLE D-1. RECOMMENDED OPERATIONAL AND CONTROL TESTING. Unit Process Parameters Testing Location/Frequencies (see key for description) Unit Process Parameters Testing Location/Frequencies (see key for description) 1. Primary 1. Primary a) DOB 5 /TSS/TVS 1/bw; 2,3/2 a) DOB 5 /TSS/TVS 1/bw; 2,3/2 b) settleable solids 2, 3/d b) settleable solids 2, 3/d c) pH 2,3,8/d c) pH 2,3,8/d 2. Suspended Growth Reactor 2. Suspended Growth Reactor a) BOD 5 /nutrients 1/bw; 2/w; 3/bw a) BOD 5 /nutrients 1/bw; 2/w; 3/bw b) TSS/TVSS 6/d; 13/w b) TSS/TVSS 6/d; 13/w c) 30 minute SSV/pH/DO 6/d c) 30 minute SSV/pH/DO 6/d d) microscopic exam. 6/w d) microscopic exam. 6/w 3. Attached Growth Reactors 3. Attached Growth Reactors a) BOD 5 /nutrients 1/bw; 2/w; 3/bw a) BOD 5 /nutrients 1/bw; 2/w; 3/bw b) TSS/TVS/microscopic exam. 14/w b) TSS/TVS/microscopic exam. 14/w c) pH, DO 1/d; 2/w c) pH, DO 1/d; 2/w 4. Ponds of Lagoons 4. Ponds of Lagoons a) BOD 5 /nutrients 1/w; 2/w a) BOD 5 /nutrients 1/w; 2/w b) TSS/microscopic exam. 1/w; 2/w; 7/w b) TSS/microscopic exam. 1/w; 2/w; 7/w c) pH/DO/temperature 1/d; 7/d c) pH/DO/temperature 1/d; 7/d 5. Anaerobic Digestion 5. Anaerobic Digestion a) TS/TVS 6,11,12/w; 8,9,10,13/bw a) TS/TVS 6,11,12/w; 8,9,10,13/bw b) pH/alkalinity/temp. 6,12/d; 11,15/bw; 6/w; 13/bw b) pH/alkalinity/temp. 6,12/d; 11,15/bw; 6/w; 13/bw 6. Aerobic Digestion 6. Aerobic Digestion a) TS/TVS 6,11,12/w; 13/bw a) TS/TVS 6,11,12/w; 13/bw b) settleable solids 6/d b) settleable solids 6/d c) pH/temperature 6/d; 15/bw c) pH/temperature 6/d; 15/bw d) microscopic exam. 6/w; 13/bw d) microscopic exam. 6/w; 13/bw 7. Sludge Thickening 7. Sludge Thickening a) TS/TVS 1,2/d a) TS/TVS 1,2/d b) settleable solids 6/d b) settleable solids 6/d 8. Sludge Dewatering 8. Sludge Dewatering a) TS/TVS 1,2,4,12/q a) TS/TVS 1,2,4,12/q b) pH/alkalinity 15/q b) pH/alkalinity 15/q 9. Chemical Clarification 9. Chemical Clarification a) BOD 5 /COD/TSS/TYS 1,2/w a) BOD 5 /COD/TSS/TYS 1,2/w pH/alkalinity 1,2,3,4,6/d pH/alkalinity 1,2,3,4,6/d b) settleable solids/flocculation 1,2,6/d b) settleable solids/flocculation 1,2,6/d c) nutrients 1,2/q c) nutrients 1,2/q 10. Tertiary Filtration 10. Tertiary Filtration a) BOD 5 /TSS 1,2/w a) BOD 5 /TSS 1,2/w b) pH/alkalinity 1,2/d b) pH/alkalinity 1,2/d c) nutrients 1,2/q c) nutrients 1,2/q TABLE D-1 - KEY TABLE D-1 - KEY FREQUENCY SAMPLING LOCATION FREQUENCY SAMPLING LOCATION d - Daily 1. Process Influent d - Daily 1. Process Influent w - Weekly 2. Process Effluents w - Weekly 2. Process Effluents bw - Biweekly 3. Influent plus Return Waste Streams bw - Biweekly 3. Influent plus Return Waste Streams q - Daily when in operation 4. Following Chemical Addition q - Daily when in operation 4. Following Chemical Addition 5. Filtered Effluent 5. Filtered Effluent CONVENTIONAL PARAMETERS 6. Contents of Reactor CONVENTIONAL PARAMETERS 6. Contents of Reactor BOD 5 - 5-day biochemical oxygen demand 7. All Cells of Each Lagoon or Pond BOD 5 - 5-day biochemical oxygen demand 7. All Cells of Each Lagoon or Pond SS - Suspended solids 8. Raw Sludge SS - Suspended solids 8. Raw Sludge TS - Total solids 9. Primary Sludge TS - Total solids 9. Primary Sludge VS - Volatile solids 10. Secondary Sludge VS - Volatile solids 10. Secondary Sludge DO - Dissolved oxygen 11. Digester Influent DO - Dissolved oxygen 11. Digester Influent NUTRIENTS - Forms of phosphorus and nitrogen as required by the certificate CTO issued. 12. Treated Sludge NUTRIENTS - Forms of phosphorus and nitrogen as required by the certificate CTO issued. 12. Treated Sludge 13. Return Sludge 13. Return Sludge 14. Attached Growth 14. Attached Growth 15. Process Supernatant 15. Process Supernatant