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l Third Quarter 1994 Status Report 4 Golden Grain Company, Manteca Bean FacAity, 229 Moffat Blvd , Manteca, CA September 26, 1994 07/13-14/94 The system was automatically shut down as a result of a high LEL alarm condition The audible alarm was active upon arriving at site, but the LEL indicated only 1 percent LEL The VES and groundwater systems were restarted after removing and cleaning the sensors, and was operating under normal conditions the day after the problem occurred 07/28-31/94 The catalytic oxidizer again shut down for an unknown reason It was later determined that a relay within the catalytic oxidizer was falling All system interlocks operated correctly, and the system was reset and operating under normal conditions on the same day that the problem was identified 08/06-09/94 A 1/2 amp controller fuse within the lead vapor scrubber failed, causing the entire system to shut down The fuse was replaced and the VES and groundwater system were operating under normal conditions within one day after Groundwater Technology had knowledge of the system shutdown 08/22-24/94 The catalytic oxidizer shut down because of a relay failure Several contacts of the MT-46 relay within the catalytic oxidizer were not functioning properly The Interlock wires were moved to unused contacts, but the entire relay needs replacement A new relay has been ordered The VES and groundwater systems were reset and was operational within a day after . Groundwater Technology had knowledge of the shutdown 09/06-08/94 The catalytic oxidizer shut down because of the MT-46 relay A new relay has been ordered, but has not yet been received or Installed The VES and groundwater system were reset and was operational within a day after Groundwater Technology had knowledge of the shutdown During this quarter of operation, there were no releases of untreated groundwater or untreated system effluent vapors System shutdowns were planned or occurred as a result of designed system safety Interlocks, which shut down the remediation systems to preclude untreated releases Calculations using TPH-g concentrations and system flow rates obtained during field visits Indicate that approximately 77 pounds of TPH-g were removed from the soil by the VES during this quarter The cumulative amount of hydrocarbons removed by VES since start-up is estimated at 3,397 pounds Less than 1 pound of TPH-g was removed from the groundwater during this quarter Calculations for mass removal from the vapor and grgundwater treatment systems for the second quarter are Included in attachment 3 During this reporting period, the VES was monitored each week The influent and effluent vapor concentrations were measured for TPH-g using an FID Values measured during site visits this quarter, as well as historical data from February 1994 are shown in table 3 The average destruction removal efficiency of 99 8 percent was calculated using weekly FID readings of the catalytic oxidizer • 0102RO14 202 ®GROUNDWATER TECHNOLOGY, INC