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Canepa's Car Wash 248 East Park Street,Stockton,California First Quarter Groundwater Monitoring Report,January 2003 Page 4 of 5 . Table 2—Groundwater Laboratory Analytical Results (January 2003 B T E X TPH-G MTBE Analytical Method---> 8020 8020 8020 8020 8015M 8020 Reporting Units--> gg/L 4g/L gg/L pg/L mg/L µg/L Sample I D 2038-MW1-1/13/03 <0 5 <0 5 <0 5 <1 0 <0 05 <5 0 2038-MW2-1113/03 36 19 47 64 89 <0 5*(8260B) 2038-MW3-1/13103 06 <0 5 <0 5 <1 0 0 083 72 2038-MW4-1/13/03 <0 5 <0 5 <05 <1 0 <0 05 <5 0 2038-MW5-1/13/03 8,100 6,600 1,700 6,000 55 <1,000 2038-MW6-1/13/03 <0 5 <0 5 <0 5 <1 0 <0 05 12 2038-MW7-1113/03 <0 5 <0 5 <0 5 <1 0 006 150 Units Analytical mg/L=milligrams per liter=parts per million(ppm) B,T,E,X=benzene,toluene,ethyl benzene,total xylenes gg/L=micrograms per liter=parts per billion(ppb) TPH-G=total petroleum hydrocarbons quantified as gasoline Methyl tertiary butyl ether(MTBE) * = MTBE was analyzed by EPA Method 8020, inconsistent results were confirmed by EPA Method 8260B FUTURE WORK The next quarterly groundwater monitoring event is scheduled for April 2003 Condor has submitted a • Work Plan for Additional Soil c& Groundwater Investigation by Cone Penetrometer Testing, dated November 1, 2002, to the SJCE14D for approval The work plan is designed to further evaluate the vertical and horizontal extent of groundwater contamination at the site LIMITATIONS AND SIGNATURES This report was prepared under the direct supervision of a Registered Geologist in the State of California The standard of care for all services performed or furnished by Condor is commensurate with the care and skill ordinarily used by member of the environmental profession practicing under similar conditions at the same time in the same locality Condor is not responsible for the accuracy and completeness of information collected and developed by others This report was prepared for the sole use of Remo Canepa, and may not be used or relied upon by any other person(s) without the express written consent and authorization of Remo Canepa and Condor If any changes are made or errors found in the information used for this report, the interpretations and conclusions contained herein shall not be considered valid unless the changes or errors are reviewed by Condor and either appropriately modified or re-approved in writing Any questions regarding the content of this document should be addressed to Don Kresse at(209)234-0518 Respectfully submitted, CONDOR EARTH TECHNOLOGIES,INC v�SF No. 6430 • Patsy Gonza ez Donald F Kresse vim Q Environmental Specialist California Registered Geolog IL CONDOR