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08 January 1997 <br /> AGE-NC Project No. 95-0106 <br /> Page 2 of 5 <br /> tape and immediately placed under ice in a chilled container for transportation to a State-certified <br /> laboratory. Each soil sample sleeve will be labeled with the following: boring location, vertical <br /> depth, time, date and sampler's initials. <br /> 2.2. PROBING AND SAMPLING <br /> The PHS-EHD is also requiring the performance of a soil gas survey, to determine the extent of <br /> petroleum hydrocarbon soil vapors in the City of Tracy Right of Way. Also AGE proposes to <br /> initially advance at least six soil gas probe borings in the City of Tracy Right of Way, within West <br /> Beverly Place. Proposed probe boring locations are illustrated in Figure 2. Each probe boring will <br /> be advanced to depths of 5 feet below surface grade (bsg),using a Geoprobe 5400 probing unit. Soil <br /> gas samples will be collected from each probe boring. <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water after <br /> washing with a solution of Alconox. All hollow stem augers are steam-cleaned prior to advancement <br /> in each borehole. All Geoprobe rods are cleaned prior to advancement in each probe boring location. <br /> 3.3. LABORATORY ANALYSIS <br /> Selected soil samples will be analyzed for total petroleum hydrocarbons quantified as gasoline(TPH- <br /> g)and volatile aromatic compounds (benzene,toluene,ethylbenzene and total xylene: BTE&X) and <br /> methyl-tertiary-butyl ether (MTBE) in accordance with EPA methods 8015/5030, 8020/602 and <br /> 8020/602, respectively. Each soil gas samples will be analyzed for TPH-g, BTE&X and MTBE in <br /> accordance with EPA methods 8015m/5030, 8020 and 8020,respectively. Selected soil samples may <br /> be released to a State-certified laboratory to be analyzed for intrinsic permeability,moisture content <br /> and porosity in accordance with the appropriate ASTM methods. OJO 1F 4167MIfIc* J 4 <br /> a1" W fW* Qt�1lOM� <br /> Laboratory reports of both all analysis,testing methods, laboratory quality assurance/quality control Uil� <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with the <br /> findings and recommendations. <br />