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I <br /> 10 August 2002 <br />' AGE-NC Project No 98-0433 <br /> Page 4 of 4 <br />' • MTBE was detected In well MW-1 at a concentration of 1,800 gg/l, which is significantly <br /> above the DHS' primary MCL, MTBE was also detected in well MW-8 at a concentration <br /> of X gg/l, which Is above the DHS' secondary MCL <br /> • TBA was detected for the first time and TAME was detected for the second time in well <br /> MW-1 The concentration of TBA Iexceeds the DHS's drinking water Action Level of <br />' 12 µg/I '�9 At�U <br /> • Except for MTBE In southernmost well MW-8, the lateral extent of dissolved hydrocarbons <br /> Iis defined by the current well network <br /> I5.0. RECOMMENDATIONS <br />' Based on the results of this investigation, AGE recommends <br /> • Continued quarterly monitoring at the site,the next monitoring event should be scheduled for <br />' September 2002 <br /> • Coordinate the ground water monitoring activities of Junco Truck Plaza and the adjacent <br /> Ripon Farm Service (22871 South Highway 99) to occur concurrently <br /> Preparation of a Corrective Action Plan(CAP)to determine appropriate remedial options for <br /> the site <br />' 6.0. LIMITATIONS <br /> Our pr ofessional services were performed using that degree of care and skill ordinarily exercised by <br />' environmental consultants practicing In this or similar localities The findings were based mainly upon <br /> analytical results provided by an independent laboratory Evaluations of the hydrogeologrc conditions <br /> at the site for the purpose of this investigation were made from a limited number of available data <br /> points(i e ground water samples),and subsurface conditions may vary away from these data points <br /> No other warranty, expressed or Implied, is made as to the professional interpretations, opinions and <br /> recommendations contained In this report <br /> • <br /> I , <br /> Advanced GeoEnvironmenlaL,Inc <br />