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CAM BRIA <br /> Conclusions <br /> The petroleum hydrocarbon and MTBE concentrations in groundwater samples collected <br /> from the shallow wells this quarter are within the historical norm for this site Since <br /> beginning weekly GWE, petroleum hydrocarbon and MTBE concentrations in Well RW-1A <br /> have decreased <br /> Groundwater samples from the CalTrans irrigation well and the private water wells did not <br /> contain petroleum hydrocarbons and fuel oxygenates, except for the Boardman and Warman <br /> wells, which contained TPPH We will continue quarterly groundwater sampling and analysis <br /> to confirm the presence or absence of MTBE in these wells <br /> Recommendations <br /> Cambria recommends that groundwater monitoring, sampling, and reporting continue on the <br /> established schedule for the next quarter GWE will continue through June 1999 <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> (707) 935-4854 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> d /c�' '7 <br /> � V,pF ES SI p� <br /> Aubrey K Cool Q '9( <br /> 4Ailsa <br /> *S_Le <br /> �� �'' ��Cy F <br /> till "0 <br /> CIE! No C47 49 m <br /> j,/ Exp )Senior eologist 4 <br /> RG #6717 `J'lf. CIV1�- <br /> F�F C P.L���� <br /> 241-0783 3 <br />