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Fist Quarter 1995 Statua Report 5 . Golden Grain Company, Manteca Bean Facility,229 Moffat Blvd, Manteca,CA April 6, 1995 detection limit Results of effluent water sample analyses were below the City of Manteca Public Works Department Industrial Wastewater Discharge Permit (No 92-2) limits CUMULATIVE REMOVAL OF TPN-G Calculations using TPH-g concentrations in vapor and system flow rates obtained during field visits Indicate that approximately 1 pound 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 3,444 pounds Similar calculations using TPH-g concentrations in groundwater treatment system influent and the system flow rate indicates that less than 1 pound of TPH-g was removed from the groundwater during this quarter The cumulative amount of hydrocarbons removed from the groundwater is estimated to be approximately 7 pounds Calculations for mass removal from the vapor and groundwater treatment systems for the fourth quarter are Included in attachment 3 The smaller mass of hydrocarbons removed by VES during this quarter as compared to last quarter can be attributed to steadily declining hydrocarbon concentrations within the sod and the unusual amount of rainfall during the quarter CONTINUED OPERATION • Site work for the next quarter will include dally system check via modem, weekly site visits for equipment operation and maintenance, weekly monitoring of system operating conditions and vapor influent and effluent concentrations, quarterly monitoring and sampling of site wells, and quarterly sampling of treatment system influent and effluent groundwater streams Also, quarterly vapor extraction monitoring and induced vacuum readings will be measured The treatment system is expected to operate under normal conditions during the next quarter i i 0102RO15 202 GROUNDWATER EEITECHNOLO(;Y,INC