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Canepa s Car Wash 248 East Park Street,Stockton,California Second Quarter Groundwater Monitoring Report,May 2004 Page 4 of 5 • Table 2—Groundwater Laboratory Analytical Results (May 2004 B T E X TPH-G MTBE Analytical Method-+ 8020 8020 8020 8020 8015M 8020 Reporting Units-)� 1AWL µg/L }tg/L µg/L mg/L µg/L Sample I D 2038-MW1-5/101/04 09 <0 5 <0 5 <1 0 009 1 1*(8260B) 2038-MW2-5110//04 75 42 51 110 64 <5 0*(8260B) 2038-MW3-5/10/04 09 <0 5 <0 5 <1 0 013 <5 0*(8260B) 2038-MW4-5/10/04 <0 5 <0 5 <0 5 <1 0 <0 05 <5 0 2038-MW5-5/10104 9,300 3,300 1,900 6,000 50 <50*(8260B) 2038-MW6-5110/04 <0 5 <0 5 <0 5 <1 0 <0 05 <5 0 2038-MW7-5/10/04 <0 5 <0 5 <0 5 <1 0 <0 05 <5 0 Units Analytical mg/L=milligrams per liter=parts per million(ppm) B,T,E,X=benzene,to3uene,ethyl benzene total xylenes pg/L=micrograms per liter=parts per billion(ppb) TPH-G total petroleum hydrocarbons quantified as gasoline MTBE=Methyi tertiary butyl ether *=MTBE was originally analyzed by EPA Method 8020, indicated value is the result of re-analysis by EPA Method 8260E FUTURE WORK The next quarterly groundwater monitoring event is scheduled for July 2004 Condor submitted a Work Plan for Additional Soil& Groundwater Investigation by Cone Penetrometer Testing, dated November 1, 2002, to the SJCEHD for approval The work described by the work plan is intended to further evaluate the vertical and horizontal extent of groundwater contamination at the site Mr Jeff Wong of SJCEHD approved the work plan in a letter dated March 18, 2003 After receiving a site access agreement for the off-site borings associated with the approved work, Condor conducted the proposed soil and groundwater investigation from April 14 through April 19, 2004 at and near the site The results of the work are provided under separate cover t„p� CONDOR