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02 December 2002 <br /> • AGE-NC Project No 98-0433 <br />' Page 4 of 4 <br />' a Benzene was detected on in the sample from well MW-1 at a concentration)Obove the DHS' <br /> Maximum Contaminant Level (MCL) of 10 µg/1 in drinking water <br /> • MTBE was detected in well MW-1 and MW-8 at concentration of 2,400 µg/1 and 44 gg/l, <br />' respectively,whichare significantly above the DHS'pnmaryMCL,MTBE was also detected <br /> in well MW-2 at a concentration of 5 0 µg/l which is below the DHS' primary MCL and <br /> equal to the DHS' secondary MCL <br /> I0 TBA was detected for the second time and TAME was detected for the third time in well <br /> MW-1 The concentration of TBA exceeds the DHS's drinking water Action Level of <br />' 12 µg/1 <br /> • Except for E ant JPH-g in southernmost well MW-8 and excessive concentrations of <br /> TPH-g -n ea%ost well MW-b,the lateral extent of dissolved hydrocarbons is defined by <br />' the current well network ,,,I� <br />' 5.0. RECOMMENDATIONS <br /> lie Based on the results of this investigation, AGE recommends <br /> • Continued quarterly monitoring at the site, the next monitoring event should be scheduled <br /> 1 for December 2002 <br /> • Coordinate the ground water monitoring activities of Jimco Truck Plaza and the adjacent <br /> 1Ripon Farm Service (22871 South Highway 99) to occur concurrently <br /> • Preparation of Corrective Action Plan(CAP)to determine appropriate remedial options for <br /> the site \ .r y r g�, r' r-.#- <br /> 1 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> 1 environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> conditions at the site for the purpose of this investigation were made from a limited number of <br /> 1 available data points (I a ground water samples), and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or implied, Is made as to the professional <br /> Interpretations, opinions and recommendations contained in this report <br /> • <br /> 1 Advanced GeoEnvi ron mental,Inc <br /> 1 <br />