Laserfiche WebLink
iCAMBRIA [RECF _ _ ,D) <br /> MAY 0 3 20OZ April 30, 2002 <br /> MARC'' LTH <br /> Harlin Knoll PERS ```11 AS <br /> San Joaquin County Public Health Services <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> RE First Quarter 2002 Groundwater Monitoring Report <br /> BP Oil Site No 11194 <br /> 2375 Tracy Boulevard <br /> Tracy, California <br /> Cambria Project No 852-1756 <br /> Dear Mr Knoll <br /> On behalf of BP Oil Company, Cambria Environmental Technology, Inc has prepared this First <br /> Quarter 2002 Groundwater Monitoring Report for the above referenced site This report <br /> summarizes chemical data collected since 1987 including analytical results associated with <br /> samples recently collected on January 29, 2002 <br /> Water level and analytical results for this monitoring event are summarized in Figure 1 and on <br /> Table I of Appendix A Based on the contoured elevations, water generally flowed toward the <br /> northeast During this monitoring event, only well MW-6 reported more than 100 micrograms <br /> per liter(µg/L) of benzene, with a concentration of 256 µg/L More than 100 µg/L of methyl tert <br /> butyl ether (MTBE) was reported in wells AMW-5, MW-2, MW-3, MW-6 and MW-7, with a <br /> maximum concentration of 780 µg/L in well MW-2 <br /> Benzene and MTBE concentrations and water level trends for wells MW-2 and MW-7 are shown <br /> in Figures 2 and 3, respectively Analytical results below method reporting limits are plotted at <br /> one half the detection limit (open symbol) Based on the decreasing trends exhibited in these <br /> o a k I a n d, CA wells, the monitoring well network is adequate and additional investigation is not warranted at <br /> San Ramon CA this time <br /> Sonoma, CA <br /> Cambria <br /> Environmental <br /> n0logy,Inc <br /> 11 65th Street <br /> Suite B <br /> Oakland CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />