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C A M B R I A <br /> Quarterly Sampling <br /> Groundwater samples were analyzed for total purgeable hydrocarbons as gasoline (TPHg) by <br /> EPA Method 8015 (Modified) and benzene, toluene, ethylbenzene, xylenes (BTEX), and <br /> methyl tertiary butyl ether (MTBE) by EPA Method 8020 The groundwater samples were <br /> also analyzed for MTBE according to EPA Method 8260A <br /> Chemical analytical data are presented in a summary table in Blaine's groundwater <br /> monitoring report (Appendix A) <br /> Conclusions and Recommendations <br /> The concentration of MTBE in this well continues to show a slight decrease when compared <br /> to previous sampling events Quarterly monitoring and sampling will continue on the <br /> established schedule <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> (707) 933-2361 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> d <br /> Lisa Summers <br /> Staff Scientist D GEO` <br /> QN W <br /> Joe W Neely, G y `� <br /> Senior Project Geologist No 6427 • <br /> RG 6927 <br /> �P <br /> Attachments <br /> Figure 1 Site Vicinity Map <br /> Figure 2 Depth to Groundwater/Chemical Concentration Map <br /> Appendix A Blame Tech Services Inc - Groundwater Monitoring Report <br /> • cc Ms Karen Petryna, Equiva Services LLC <br /> Mr Marty Hartzell, Regional Water Quality Control Board <br /> 1359 2 <br />