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• <br /> MONITORING AND REPORTING PROGRAM <br /> DEFENSE DISTRIBUTION REGION WEST, TRACY <br /> SAN JOAQUIN COUNTY <br /> Type of Sampling <br /> Constituents unilas Sample Frequency <br /> Total Volume of Gallons Meter Continuous <br /> Water Treated <br /> Average Flow Rate gpm Meter Continuous <br /> EPA Methods 601 and 602 ° Metals scan using ICAP or equivalent <br /> z Modified EPA Method 8015 5 By Atomic Absorption <br /> 3 EPA Method 8081 <br /> STORM WATER EVAPORATION/PERCOLATION POND MONITORING <br /> The Storm Water Evaporation/Percolation Pond (when discharging treated ground water to the <br /> Storm Water E/P Pond) shall be monitored in accordance with the following: <br /> Type of Sampling <br /> Constituents unita Sample Frequency <br /> Volume of Water Gallons Meter Weekly <br /> Discharged <br /> Average Flow Rate gpm Meter Weekly <br /> Water Surface Elevation feet, MSL Staff Gauge Weekly <br /> Temperature °F/°C Grab Weekly <br /> Volatile Organics' 1-1g/1 Grab Quarterly <br /> ' EPA Methods 601 and 602 <br /> EXTRACTION, PERFORMANCE, and MONITORINGWELLS MONITORING <br /> Extraction Wells shall be monitored in accordance with the following schedule during <br /> extraction. Performance Monitoring Wells for the ground water extraction system shall be <br /> monitored in accordance with the following schedule, except during extended periods of shut <br /> down. Background Monitoring Wells shall be monitored in accordance with the following <br />