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A <br /> Fourth Quarter 1,993 Status Report January 6, 1994 <br /> Golden Grain Company, Manteca Bean Facility, 229 Moffat Blvd , Manteca CA 3 <br /> • Taking flame-ionization detector (FID) measurements of system vapor effluent and <br /> 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 scrubber operational parameters, <br /> • Recording operational data and maintaining rotron blowers and vapor extraction <br /> system, <br /> • Checking and recording operational data for LO-PRO'" Lo-Profile Air Stripper, <br /> making adjustments as necessary, and <br /> • Performing a daily system operating parameters check via modem <br /> Primarily due to electrical equipment failures and normal attrition of electrical components, the <br /> system was only operational for 45 days during the fourth quarter The following is a list of the days <br /> that the remediation system was not operational <br /> 9/18 - 24/93 Fuse failure in catalytic oxidizer and burned thermocouple in lead <br /> scrubber <br /> 9/27 - 10/18/93 Lead scrubber fuse block, wiring, and solid state relays were burned <br /> as a result of a relay failure in the "on" position This type of relay is <br /> designed or usually fails in the "off" position thereby breaking the <br /> circuit In this case, however, the circuit remained locked "on", <br /> overheating the adjacent components The initial relay failure was <br /> probably because of the high heat operational environment for the <br /> relay and normal switching (frequency) Ide of the relay The length <br /> of down time after this problem resulted from waiting for back <br /> ordered parts necessary to make repairs <br /> 10/22 - 29/93 Catalytic oxidizer main fuse failure and heater high temperature <br /> control damaged Parts availability lengthened down time for this <br /> repair <br /> 11/05 - 09/93 Wires for lead scrubber thermocouple damaged from overheating <br /> This was a result of the terminal connections for the wires becoming <br /> loose from constant temperature change associated with normal <br /> operation of the unit The thermocouple signal did not reach the <br /> temperature control unit, due to the loose connections, causing the <br /> scrubber to continue to draw power and heat beyond normal <br /> operating temps A new thermocouple was installed and special <br /> high heat "lock-tight" was put on the terminal connections <br /> 3879RO23 070 <br /> GROUNDWATER <br /> TECHNOLOGY,INC <br />