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CAMBRIA <br /> Quarterly Sampling <br /> Groundwater samples were analyzed for total purgeable hydrocarbons as gasoline (TPHg) <br /> according to EPA Method 8015 (Modified), benzene, toluene, ethylbenzene, xylenes <br /> (BTEX), and MTBE according to EPA Method 8020 <br /> Chemical analytical data are presented in a summary table in Blaine's groundwater <br /> monitoring report (Appendix A) <br /> Conclusions and Recommendations <br /> i <br /> Petroleum hydrocarbons were not detected in wells S-2 and S-3 this quarter, and petroleum <br /> hydrocarbon concentrations in well S-1 are generally consistent with historical data for this <br /> well Groundwater flow direction at this site has predominantly been to the south or <br /> southeast Well S-2 is located downgradient of well S-1 and has not contained petroleum <br /> hydrocarbons since groundwater sampling began at this site This indicates there has not been <br /> extensive impact to groundwater at this site However, Cambria issued a work plan for <br /> additional investigation at this site on October 15, 1999 We are prepared to implement the <br /> work plan once we receive written approval from SJCPHS <br /> Quarterly sampling and monitoring at this site will continue on the established schedule <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> 707-935-4854 <br /> i <br /> Sincerely, <br /> Ca brig Environmental Technology, Inc <br /> Lisa Summers <br /> Staff Scientist <br /> EDW Ep�o <br /> Joe W Neely, RG O `-; <br /> Senior Project Geologist <br /> RG 6927 • No 6927 <br /> SOF CA41� <br /> • <br /> 241-0797 2 <br />