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Third quarter 1994 Status Report 3 <br /> Golden Grain Company, Manteca Bean Facility,229 Moffat Blvd , Manteca, CA September 26, 1994 <br /> from the sampling of other wells This could have been the cause of the upgradient wells having <br /> trace concentrations of TPH-g and benzene detected in them during the past year The wells will be <br /> hand bailed during the next sampling event, and the results of the sample analysis as well as the <br /> field procedures used during sampling will be monitored for recurring problems <br /> TREATMENT SYSTEM OPERATION AND MAINTENANCE <br /> During this quarter, the soil and groundwater treatment system was operational for 70 days The soil <br /> treatment system extracts vapors from wells MW-2 and MW-3 The groundwater treatment system <br /> extracts groundwater from well RW-1 During the quarter, 13 site visits were made to perform <br /> system operation and maintenance work Work performed during each maintenance event included <br /> • taking flame-ionization detector (FID) measurements of system vapor effluent and influent <br /> • checking and recording the catalytic oxidizer operational data <br /> • checking and calibrating the system lower explosive limit (LEL) meters <br /> • checking and recording system lead vapor scrubber operational parameters <br /> ! • recording operational data and maintaining vacuum extraction blowers and vapor <br /> extraction system (VES) <br /> • checking and recording operational data for the LO-PROU' Lo-Profile Air Stripper, and <br /> making adjustments as necessary <br /> • checking the condition of the catalytic water conditioner which minimizes fouling caused <br /> by the hardness of the water <br /> • performing a daily system operating parameters check via modem <br /> The soil vapor extraction and groundwater treatment systems ran continuously this quarter except <br /> for six occasions The following is a list of the days that the remediation system was not <br /> operational <br /> 06/19-22/94 The catalytic oxidizer shut down for an unknown reason, causing the air <br /> Stripper to automatically shut down because of the system interlocks The <br /> motor operated valves rotated and the blower drew suction on ambient air <br /> rather than vapor from the soil The lead vapor scrubber remained <br /> operational The system was reset and was operating under normal <br /> conditions within two days after Groundwater Technology had knowledge of <br /> the system shutdown <br /> 01028014 202 <br /> HTGROUNDWATER <br /> TECHNOLOGY,INC <br />