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• Second Quarter 1996 Status Report 3 Golden Grain Company,Manteca Bean Facility,229 Moffat Boulevard,Manteca,CA ,lune 14, 19% TREATMENT SYSTEM OPERATION AND MAINTENANCE The soil treatment system was not operated this quarter because of the lack of Influent soil vapor concentrations detected during the first quarter of the year The groundwater treatment system, however, operated continuously during the quarter The system consists of two liquid-phase granular activated carbon (GAC) vessels arranged in series which treat groundwater extracted from well RW-1 During the quarter, six site visits were made to the site to perform maintenance and routine system operation The following work was performed during each site visit ■ monitoring and recording operational data for the groundwater treatment system and making adjustments as necessary ■ monitoring the condition of the catalytic water conditioner which minimizes fouling caused by the hardness of the water ■ monitoring the liquid-phase GAC vessels and filters for pressure build up . During this quarter of operation, there were no releases of untreated groundwater or untreated system effluent vapors GROUNDWATER TREATMENT SYSTEM MONITORING A total of 443,278 gallons of water was treated between March 8, 1996, and May 31, 1996 Since the beginning of operation of the remediation system, approximately 4,894,885 gallons of water have been extracted and treated On May 7, 1996, samples were collected from the groundwater treatment system and analyzed for TPH-g, BTEX,total lead, organic lead, and ethylene dibromide at a California-certified laboratory Laboratory analytical reports and corresponding chain-of-custody records for the sampling event are included in attachment 4 Results of system historical analyses are summarized in table 3 Laboratory results Indicate that all treatment system effluent water constituents analyzed were below the method detection limit and below the City of Manteca Public Works Department Industrial Wastewater Discharge Permit (No 92-2) limits CUMULATIVE REMOVAL OF TPH-G No hydrocarbons were removed by the VES this quarter because it was not operated The cumulative amount of hydrocarbons removed by the VES since start-up is estimated at 3,444 pounds TPH-g concentrations in the groundwater treatment system influent were also below the `• detection limit this quarter, therefore, no calculations were performed for mass of TPH-g removed by 42020213 CM FLUOR DAH11111.*TO