Laserfiche WebLink
(iN%TC <br /> ASSOC IATES INC <br /> CONCLUSIONS <br /> Concentrations of petroleum hydrocarbon constituents decreased slightly in well MW-3 and <br /> remained at non-detect in wells MW-1, MW-4, MW-5, and MW-6 It appears as though there is <br /> residual petroleum hydrocarbon contammation remaining in the soil <br /> The direction of groundwater flow and the magnitude of hydraulic gradient are generally <br /> consistent with previous quarters <br /> RECOMMENDATIONS <br /> Based on the results of the tlurd quarter 1998 monitoring episode, we recommend the following <br /> o Conduct the Fourth Quarter 1998 groundwater monitoring and sampling of wells MW-3 <br /> and MW-6 <br /> o Continue to analyze the groundwater samples from well MW3 for MTBE by EPA Method <br /> 8020 <br /> o Discontinue analyzing the groundwater samples from all wells for oxygenate fuel additives <br /> by EPA Method 8260 <br /> Please contact our office at (209) 579-2221 if you have any questions or comments <br /> Respectfully Submitted, <br /> ATC Associates Inc <br /> Dtim �C""Xd_ I <br /> Drew <br /> Van Allen <br /> Staff Scientist <br /> rS11 aa11� ti � ^ii � ��` <br /> Jeanne Homsey, `=n <br /> CA Registered Civil Engineer No 47410 N,1.�q�_ - <br /> t £" f� <br /> cc Gerald Thiemann Jf" C 1 v il <br /> Elizabeth Thayer, RWQCB <br /> w 1626051quaaj0gr-1998 dm 3 <br />