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San Joaquin Workplan <br /> t <br /> TASK III LABORATORY ANALYSIS <br /> Soil samples will be maintained and transported 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 be 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. <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 /> nents of the criteria established by the RWQBC for a Problem Assessment <br /> Report,including but not Iimited to vertical and lateral migration characteris- <br /> tics of hydrocarbons, nearby wells, businesses and utilities, and preliminary <br /> evaluation of appropriate and applicable remedial and mitigating alternatives <br /> based upon data obtained.The summary report will be prepared and signed by <br /> a State of California Registed Civil Engineer or Geologist. <br /> 5.0 METHODOLOGY <br /> 5.1 Drilling and Soil Sampling <br /> Drilling will be performed utilizing a truck mounted drill rig equipped with <br /> flight hollow-stem auger. An Augeas geologist or engineer will be present <br /> during drilling to assist in obtaining relatively undisturbed samples of the <br /> subsuface materials,to maintain a log of borings,to field screen samples with <br /> a device capable of detecting volatile organic hydrocarbons as a trace gas,and <br /> to 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 /> Project Number: JOAQ22192 <br />