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?w Canepa's Car Wash 248 East Park Street,Stockton,California Third Quarter Groundwater Monitoring Report,July 2004 Page 4 of 5 iTable 2--Groundwater Laboratory Analytical Results (July 2004 B T E X TPH-G MTBE Analytical Method--)� 8020 8020 8020 8020 8015M 8020 Reporting Units—* µg/L µg/L µg/L µg/L mg/L n/L Sample I D 2038-MW I-7114/04 05 <0 5 <0 5 <1 0 <0 05 87 2038-MW2-7/14/04 41 <40 76 100 68 <5 0*(8260B) 2038-MW3-7/14/04 08 <0 5 <0 5 <1 0 0 067 2 6"'(8260B) 2038-MW4-7/14/04 <0 5 <0 5 <0 5 <1 0 <0 05 <5 0 I 2038-MW5-7/14/04 9,200 1,900 1,900 5,300 40 <50*(8260B) 2038-MW6-7/14/04 <0 5 <0 5 <0 5 <1 0 <0 05 5 2* (8260B) 2038-MW7-7/14/04 <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,toluene,ethyl benzene,total xylenes ytg/L=micrograms per liter=parts per billion(ppb) TPH-G=total petroleum hydrocarbons quantified as gasoline MTBE=Methyl tertiary-butyl ether *=MTBE was originally analyzed by EPA Method 8024, indicated value is the result of re-analysis by EPA Method 8260E FUTURE WORK The next quarterly groundwater monitoring event is scheduled for October 2004 Condor submitted a Work Plan for Additional Soil & Groundwater Investigation by Cone Penetrometer Testing, dated November 1, 2002, to the SJCEHD for approval Mr Jeff Wong of the 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 and a work plan for installation of discrete, multiple-depth monitor wells are provided in the Additional Soil and Groundwater Investigation Report and Work Plan Addendum, dated July 12, 2004, and submitted draft to Remo Canepa on July 14, 2004 • i �� CONDOR