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r r15 January 2001 AGE-NC Project No 96-0232 rPage 10 of 20 r 5,900-gallon aboveground storage Baker tank and into a vacuum truck (supplied by ABCO Environmental), the extracted water was transported off-site under non-hazardous waste manifest to Invirotech, a waste treatment facility located in Roseville, California Documentation and uniform ' hazardous waste manifest for disposal of the pump test purged water is contained in Appendix A r7.0 PUMP AND TREAT SYSTEM OPERATION AND MAINTENANCE Between 22 November and 31 December 2000, the above referenced ground water pump and treat ' system was in full operation and extracted and discharged approximately 1,005,045 gallons of treated water to the Coldani ditch under RWQCB General Order 5-00-119 for discharge to surface waters of ground water from cleanup of petroleum fuel pollution, a RWQCB waste water discharge ' (NPDES permit no CAG915001)permit for discharge to the Coldam ditch was issued to Flag City Chevron by RWQCB by letter dated 06 November 2000 A copy of NPDES permit no CAG915001 ' is included with Appendix E 10 7 1 PUMP AND TREAT OPERATION The ground water pump and treat system is designed to operate at a maximum flow rate of 25 GPM, ' therefore ground water was extracted from selected wells on alternating weekly shifts The first shift consisted of wells located in the south trench-line (EW-2, EW-4, EW-6 and EW-9) and the second shift consisted of wells located in the north trench-line (EW-5, EW-7, EW-8 and EW-10) Each ' extraction well was adjusted to extract ground water at a flow rate of approximately 5 to 6 GPM, the discharge of treated water(effluent)to the Coldani ditch was adjusted at a flow rate of approximately 23 GPM Field notes of ground water pump and treat operation and maintenance activities are in ' Appendix H ' 7 2 INFLUENT MONITORING In accordance with the requirements of Attachment B's Monitoring and Reporting Program to ' General Order No 5-00-119, ground water pump and treat influent monthly monitoring of TPH-g, TPH-d, TPH-mo, BTEX, MTBE, methanol, ethanol, DIPE, TAME, ETRE, TBA, nitrate and total lead was performed on 30 November and 06 December 2000 ' Nitratewas detected in the influent water sample collected on 06 December 2000 at a as NO3 s d p ' concentration of 48 ,ugll Analytical results of Nitrate as NO3 are summarized in Table 4 MTBE was detected in the 30 November 2000 grab water sample at a concentration of 440 and 610 Advanced Geo Environmental,Inc 1