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Geological Technics Inc. Page 3 Groundwater Monitoring Report Project No. 1030.2 September 30,2002 k . I.3 Groundwater Laboratory Analyses 1.3.1 Sherwood Labs Groundwater samples collected on August 6, 2002, were delivered to Sherwood Labs of Hilmar, California(certification #1400) for analyses of- * Benzene, Toluene, Ethyl Benzene, and Xylene (BTEX) by EPA method 602 S Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 5030/8015(M) A Oxygenates (7) by EPA method 8260 U MTBE, ETBE, TAME, DIPS, TBA, 1,2 DCA, EDB s Total Lead I Total lead was below laboratory detection limits for all monitoring and domestic wells. The ' ' results of the laboratory analyses are listed in Table 2 of Appendix A, while detection limits and analytical results are presented in Appendix B. The analytical data were submitted to GeoTracker as required under AB 2886 on August 23, 2002. The confirmation code for the submittal is 1784701168. to 1.3.2 Far West Laboratories Groundwater samples collected on August 6, 2002, were delivered to Far West Laboratories, Inc. of Riverbank, California (certification#13 10) for analyses of. OTotal Alkalinity U Conductivity a Total Iron i e Sulfate i 0 Nitrate as Nitrogen The results of the laboratory analyses are listed in Table 3 of Appendix A, while detection 4 ' limits and analytical results are presented in Appendix B. i 2.0 FINDINGS AND DISCUSSION Petroleum Hydrocarbons 0 MW-I shows a significant reduction in all analyzed constituents. n Groundwater analyses of MW-101 suggest there are no gasoline range petroleum hydrocarbons impacting deep groundwater at this site. + MW-2, 3, 4, 101 and the domestic well were non-detect for all analyzed constituents. Q MW-2, MW-3 and the domestic well have been non-detect for all analyzed constituents since January of 1997. • Oxygenates, including MTBE, have not been detected at this site since monitoring began in January of 1997.