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CAMBRIA <br /> service station and historical analytical data has shown that these compounds are not present in <br /> the groundwater beneath the site, we recommend that analysis for DIPE, ETBE, TAME, <br /> methanol, ethanol, and EDB be discontinued <br /> Since methyl tertiary butyl ether (MTBE), tertiary butyl alcohol (TBA) and 1,2-dichloroethane <br /> (1,2-DCA) have been detected in groundwater beneath this site, we will continue quarterly <br /> sampling and analysis for these compounds in all wells Groundwater sample analysis for total <br /> petroleum hydrocarbons as gasoline, benzene, toluene, ethylbenzene, and xylenes will also <br /> continue on a quarterly basis We will implement the proposed changes to the quarterly <br /> k sampling program for this site once we have received approval from EHD <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 /> Cambria Environmental Technology, Inc. <br /> 06A:�� <br /> Anne Wettstone <br /> Staff Geologist <br /> D GFO� <br /> \S H W O <br /> Joe W Neely, RG �O ��Q AFF Cs <br /> Senior Project Geologist <br /> RG 6927 <br /> • No 6927 • <br /> Attachments OFC <br /> Figure 1 Well Survey Map <br /> Figure 2 Groundwater Contour/Chemical Concentration Map <br /> Appendix A Blaine Tech Services, Inc —Groundwater Monitoring Report <br /> cc Ms Karen Petryna, Shell Oil Products US <br /> Mr James Barton, Central Valley Regional Water Quality Control Board <br /> Mr Ahmad Al-Ruosan&Mr Ali Awnalah(property owners) <br /> 0854 2 <br />