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12 May 2000 <br /> AGE-NC Project No 97-0312 <br />' Page 4 of 4 <br /> 160 ppb and 2 9 ppb, respectively, exceeding the State of California drinking water Y <br />' maximum contaminant level (MCL) of 0 5 ppb <br /> • TPH-d was detected in the 20 March 2000 sample collected from the large,domestxc well at ; <br />' a concentration of 150 ppb However, the presence of TPH-d was not confirmed in the 05 <br /> April 2000 sample <br /> 5.0. RECOMMENDATIONS <br /> Based upon data obtained from the site, AGE recommends the following <br />' • Preparation of a Closure Summary Report for the site <br /> • If site closure is not likely to be granted, a reduced schedule for quarterly monitoring should <br />' be developed in conjunction with the PHS-EHD A meeting involving the PHS-EHD, the <br /> CVRWQCB and Mr Cecchim should be held to identify future requirements to achieve site <br /> closure <br /> , <br /> I <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 Evaluation of the <br /> geologic/hydrogeologic conditions at the site for the purpose of this investigation was made from <br /> a limited number of available data points(i e 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 /> rl <br /> 1 L ^ <br /> 1 ! 1 1 1 1 I <br /> 4 <br /> Advanced GeoEnviroamcntal,Inc <br /> n j <br /> e <br /> F <br />