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Town and Country Chevron -2- 5/18/98 <br /> San Joaquin County <br /> be extended another 30 tt bgs or to ground water,:which ever is reached first. If ground water is <br /> encountemd, the above analyses ure roquired(alga]see enclosed totter concerning oxygenates). <br /> In addition to the sampling protocol described in'thc amended worlcp4w, the investigation must include <br /> the use of a Photo Ionization Detector(VID)for continuous screening of the borehole for,cuntamination. <br /> Soil samples must be collected where high PID rea dl Ings aro.noted. <br /> Purge 2,paragraph 3 of the amended workplan states the pahsibility Of'cncnuntering ground water is <br /> remote. Also,if ground water is etwo entered a determination will be made concerning whether it is; <br /> perched water or the static ground water level. If is the static ground water level,then a rhonitoring <br /> well will be installed,after the client's approval. Board staff do not aUree'that the client should <br /> determine whether a monitoring well should be instilled. <br /> Whether the water is perched car the static,groundwater level,once the results are reported,we can meet <br /> to determine whether the investigation,uicluding tlic installation ut rnonitoring wells,is needed to <br /> determine the lateral and vertical extent of ground water contarnination. <br /> The rxmsults of this investigation must be submitted to meat this office and Mr.Jeff'Wong, San Joaquin <br /> County Environmental Health Department by 31:iuly 1998. <br /> If them are any questions, please call me at(916):255-3128. <br /> PATRICIA A. ANDERSON <br /> cc: Mr. Frame Goldman,Creosoly,LLC.,Sononrâ–ºa i' <br /> Mr.Jeff'Wong, San Joaquin County F?nvirori trental Health,Stockton.' <br /> £ d cad 9T-Z 866T SIOE Ss 9T5 "1 1 EDOM D : .ADM y <br /> i3 f y <br />