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I 1 <br /> r 1 <br /> i r <br /> 24 August 2001 <br /> AGE-NC Project No 98-0432 <br />' Page 4of4 <br /> ' concentrations of MTBE which exceed the State of California maximum contaminant level <br /> (MCL} of 13 µg/1 The concentrations of MTBE detected in the site monitonng wells <br /> increased from the March 2001 monitoring event,however the concentrations of MTBE have <br /> ' decreased from the initial monitonng event _ <br /> ' 5.0. RECOMMENDATIONS <br /> ' Based on the results of this investigation, AGE recommends <br /> • A quarterly monitoring event should be scheduled for October 2001 <br /> ' • Conducted interim remediation with ground water extraction from well EW-1 to prevent <br /> further migration of MTBE-impacted ground water - <br /> 6.0. LIMITATIONS <br /> Our professional 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 <br /> ' upon analytical results provided by an independent laboratory Evaluations of the <br /> geologic/hydrogeologic conditions at the site for the purpose of tins investigation are made from a <br /> limited number of available data points(i a ground water samples), and subsurface conditions may <br /> vary away from these data points No other warranty, expressed or implied, is made as to the <br /> professional recommendations contained in this report <br /> i <br /> 1 <br /> � t ; <br /> : y <br /> T Y <br /> r Advanced GeoEnvlronmental,Inc <br /> � ti <br />