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�t <br /> CAMBRIA <br /> i <br /> analyzed for fuel oxygenates (including ethanol and methanol) and lead scavengers since April <br /> 1998 The majority of the analytical findings for these analyses have been non-detect (below the <br /> detection limit) There have been some low sporadic detections of some fuel oxygenates, but no <br /> concentration trend or pattern has developed in any of the wells We feel that continued <br /> quarterly analysis for these compounds is not warranted and that annual analysis is sufficient to <br /> monitor for any change in concentration Cambria proposes that analysis for fuel oxygenates <br /> (other than methyl tertiary butyl ether [MTBE]) and lead scavengers be performed annually <br /> Analysis for MTBE will continue to be quarterly in all wells Cambria will implement this <br /> change in analysis after receiving approval from San Joaquin County Environmental Health <br /> Department <br /> CLOSING <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> (707) 933-2361 <br /> Sincerely, <br /> C mbria Environmental Technology, Inc <br /> Gv� <br /> Susan Lukaszewicz <br /> Staff Geologist RtDGEO` <br /> H W ~Fc`ocJa <br /> 21A <br /> W Neely, RG <br /> Senior Protect Geologist Isla 6927 <br /> RG 6927 <br /> OF <br /> Attachments <br /> Table I Additional Groundwater Analytical Data <br /> Figure 1 Area Well Survey <br /> Figure 2 Groundwater Contour/Chemical Concentration Map <br /> Appendix A Blaine Groundwater Monitoring Report <br /> cc Ms Karen Petryna, Shell Oil Products US <br /> 0323 2 <br />