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2.0 SCOPE OF WORK <br />2.1 FIELD WORK <br />2.1.1 Pre -Field Activities <br />Earth Tech will obtain a drilling permit from the"'San Joaquin Public Health Services/Environmental <br />Health Division ( PHS/EHD), prior to commencing work. <br />Earth Tech will prepared a site-specific Health & Safety Plan and `submit it to PHS/EHD prior to <br />commencing work. <br />2.1.2 Direct Push Sampling <br />Earth Tech will advance one direct push sample borehole through the center of: the former UST <br />location. The borehole will be extended to the maximum depth of volatile compounds detectable�by <br />field instrumentation and visual observation or 20 feet below ground surface (BGS), whichever is <br />greater. The 20 -foot BGS depth corresponds to 1978-79 (drought period) groundwater levels. <br />The depth to first occurrence ofgroundwater.is estimated to be at 10 to 20 feet BGS <br />!� 2.1.3 Soil Sampling <br />Under the direction of a Registered Geologist, continuous core soil samples will.be collected during the <br />advancement of the direct push borehole. The samples will be collected in sPecially cleaned transparent <br />plastic sampling sleeves. <br />Soil samples will be collected for possible laboratory analysis at five foot intervals, or at lithology <br />changes, whichever -is most frequent. <br />L All soil samples collected for laboratory analysis will be capped, labeled, refrigerated, and submitted <br />to a California state -certified laboratory for analysis. <br />A grab -water sample will be collected using a cleaned polyethylene bailer should groundwater be <br />encountered. The water sample will be refrigerated and submitted to a California state -certified <br />laboratory for analysis. <br />�{ Field instrumentationa hexane -call <br />( ib rated -organic vapor- analyzer [OVA]) will be used to monitor the <br />. soil samples for volatile organic compounds. <br />2.1.4 Laboratory Analysis <br />A California state -certified laboratory will be contracted to analyze the soil samples and possible <br />groundwater sample for the following contaminants of concern: <br />TEPIH-Gasoline (EPA modified 8015) <br />• Benzene, Toluene, Ethylbenzene,-and Total Xylenes (BTEX) EPA 8260 <br />• MTBE, ETBE, TAME, TB, .and'DIPE by EPA Method 8260 <br />L <br />