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MONITORING AND REPORT PROGRAM -8- <br /> DEFENSE DEPOT TRACY <br /> SAN JOAQUIN COUNTY <br /> INJECTION WELLS MONITORING: <br /> During the injection of treated groundwater into injection wells IW-1 , IW-2 and <br /> IW-3, the following monitoring program shall be conducted: <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Total Volume of gallons Meter Weekly <br /> Water Injected <br /> Injection Rate at Time gpm Meter Weekly <br /> of Sampling <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Average Injection Rate gpm Meter Weekly <br /> (since last sampling) <br /> Pressure at Time psig Meter Weekly <br /> of Sampling <br /> Water Level ft. MSL Meter Weekly <br /> PERFORMANCE MONITORING WELLS: <br /> The monitoring wells for the ground water injection system shall include the <br /> Ensotech, Inc. wells (MW6, MW7, MWS, MW9, and MW10) and the RI/FS wells (LM71 , <br /> LM27A, LM4, and LM 79). These wells shall be monitored as f ] lows: <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Volatile Organics Ag/l Grab Monthly <br /> (Methods 8010 and 8020) <br /> Specific Conductivity Ahos/cm Grab Monthly <br /> pH pH Units Grab Monthly <br /> Temperature ° F/°C Grab Monthly <br /> Water Level ft. MSL Meter leekly <br /> BACKGROUND WELLS MONITORING <br /> The objective of this monitoring phase is to establish background level <br /> concentrations for inorganic constituents. <br />