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Mr Travis Bryant February 5, 2001 <br /> Page 3 Project No 2002-1426-01 <br /> Groundwater samples were analyzed for TPHG using United States Environmental <br /> Protection Agency (USEPA) Method 8015B DHS LUFT Manual and for benzene, <br /> toluene, ethylbenzene and total xylenes (BTEX), methyl tertiary butyl ether (MTBE), <br /> tertiary amyl methyl ether (TAME), tertiary butyl alcohol (TBA), di-isopropyl ether <br /> (DIPE), ethyl tertiary butyl ether (ETBE) and 1,2-dichloroethane (1,2-DCA) using <br /> USEPA Method 8260B Certified Laboratory Reports and chain-of custody <br /> documentation are presented in Appendix C <br /> Concentrations of TPHG, TBA, and 1,2-DCA were detected in the sample collected from <br /> monitoring well MW-2 at 0 077 milligrams per liter (mg/1), 29 micrograms per liter (ug/l) <br /> and 42 µg/1, respectively No petroleum hydrocarbons or fuel additives were detected in <br /> the sample collected from monitoring well MW-1 <br /> CONCLUSIONS <br /> Concentrations of petroleum hydrocarbons and fuel additives are generally consistent <br /> with previous sampling events Petroleum hydrocarbon concentrations have declined <br /> since the initial sampling event performed in March 1997 The next sampling event is <br /> scheduled for February 2001 <br /> If you have any questions, please contact me at (530) 676-6000 <br /> Sincerely, <br /> STRATUS ENVIRONMENTAL, INC <br /> Scot Bittinger ay Jo ' son, R G <br /> Staff Geologist ` Pro ect anager <br /> Attachments Table 1 Groundwater Monitoring Data <br /> Table 2 Additional Groundwater Analytical Results <br /> Figure 1 Site Location Map <br /> Figure 2 Site Map <br /> Appendix A Field Data Sheets <br /> Appendix B Sampling and Analysis Procedures <br /> Appendix C Certified Analytical Reports and Chain-of-Custody <br /> Documentation <br /> cc Ms Margaret Lagono, San Joaquin County Public Health Services <br /> C Troject Files1I 8 C\Stockton\Qrt1y14Q00 doe STRATUS <br />