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MONITORING AND REPOR*G PROGRAM • -6- <br /> DEFENSE DEPOT TRACY <br /> SAN JOAQUIN COUNTY <br /> HOLDING POND DIVERSION PIPELINE AND HOLDING POND MONITORING: <br /> The diversion line from the air stripper to the storm drain holding pond shall <br /> be monitored in accordance with the following: <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Total Volume of gallons Meter Weekly <br /> Water Treated <br /> Flow Rate at Time gpm Meter Weekly <br /> of Sampling <br /> Average Flow Rate gpm Meter Weekly <br /> (since last sampling) <br /> Pressure at Time psig Meter Weekly <br /> of Sampling <br /> Water Surface Elevation ft. MSL Gauge Weekly <br /> in the Holding Pond <br /> Change in Holding Pond' s ft. MSL Gauge Weekly <br /> Water Surface Elevation <br /> Over Previous Reading <br /> EXTRACTION WELL MONITORING: <br /> During the extraction of ground water from extraction wells EW-1 , EW-2, EW-3, EW- <br /> 4, EW-5, and EW-6, the following monitoring program shall be conducted: <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Volatile Organics µg/l Grab Quarterly <br /> (Methods 8010 and 8020) <br /> Specific Conductivity gmhos/cm Grab Quarterly <br /> pH pH Units Grab Quarterly <br /> Temperature ° F/°C Grab Quarterly <br /> Total Volume of gallons Meter Weekly <br /> Water Extracted <br /> Extraction Rate at Time gpm Meter Weekly <br /> of Sampling <br />