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II <br /> CAMBRIA <br /> i <br /> standard The previous laboratory noted that the chromatograms indicated that the reported <br /> TPHg was primarily due to the presence of PCE This quarter all wells were analyzed for PCE <br /> PCE was detected in wells MW-1, MW-3, and MW-5 through MW-I I at concentrations ranging <br /> from 0 56 to 6,100 parts per billion The highest concentrations were detected in offsite wells <br /> southeast of the subject site These data further demonstrate that the PCE being reported as <br /> TPHg in these wells did not originate from the Shell-branded service station <br /> ANTICIPATED FOURTH QUARTER 2003 ACTIVITIES <br /> Cambria submitted a Site Conceptual ModeUSite Investigation Work Plan on October 3, 2003 <br /> In the work plan we proposed installing one shallow offsite monitoring well (MW-12) and one <br /> deep onsite monitoring well (MW-13) We also proposed conducting a dual-phase extraction test <br /> in the former tank excavation We will proceed with this work upon receiving approval from <br /> SJCEHD <br /> Blaine will gauge and sample the site wells according to the sampling schedule and tabulate the <br /> data Cambria will prepare a groundwater monitoring report <br /> • CLOSING <br /> If you have any questions regarding the contents of this document, please call Aubrey Cool at <br /> (510)420-3336 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc. <br /> . /V,_ i /' <br /> Aubrey K Cool / <br /> Project Geologist <br /> e0_ <br /> Joe W Neely,RG <br /> Senior Project Geologist ~� <br /> RG 6927 No 6927 ° <br /> OF CAL1C-O� <br /> 0854 2 <br />