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r ` <br /> San Joaquin Workplan <br /> TASK III LABORATORY ANALYSIS <br /> Soil samples will be maintained and tra{iisported under proper chain-of custody <br /> { protocol to a State-approved laboratory for chemical analysis. Soil samples <br /> { would be analyzed to detect the presence'°and concentration of benzene, <br /> toluene,xylene,ethylbenzene and total,,petroleum hydrocarbons as referenced <br /> to gasoline. <br /> Additionally, selected subsoil samples will bt submitted for laboratory engi- <br /> neering analyses to evaluate grain-size distribution,moisture content and bulk <br /> _ densities, and laboratory permeablility testing. Selected samples will also be <br /> analyzed for microbiological characteristics E <br /> TASK IV REPORT OF FINDINGS <br /> A summary report will be prepared at the completion of the field,laboratory, <br /> chemical analyses and office analysis portions of the investigation.The report <br /> would detail the findings of the investigation,and would address the compo- <br /> vents of the criteria established by the RWQBC for a Problem Assessment <br /> Report,including but not limited to vertical and lateral migration characteris- <br /> ties of hydrocarbons, nearby wells, businesses and utilities, and preliminary <br /> j evaluation of appropriate and applicable remedial and mitigating alternatives <br /> based upon data obtained.The summary report will be prepared and signed by s <br /> a State of California Registed Civil Engineer or Geologist. <br /> °p <br /> 5.0 METHODOLOGY <br /> 5.1 Drilling and Soil Sampling <br /> Drilling will be performed utilizing a-truckmounteddrill rig equipped with <br /> flight hollow-stem auger. An Augeas geologist or engineer will be present <br /> during drilling to assist in obtaining 11relatively undisturbed samples of the <br /> subsuface materials,to maintain a log of borings,to field screen samples with f <br /> a device capable of detecting volatile organic hydrocarbons as a trace gas,and <br /> jto make observations of the site conditions.;' <br /> Subsoils will be sampled at approximate 5.foot vertical intervals (or more <br /> frequently as deemed appropriate by the field geologic or engineer),commenc- <br /> t Project Number: JOAQ22192 <br /> E � , <br /> t <br /> ,i <br />