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Details of the proposed SOW are presented below. <br /> TASK I - PREPARE A WORKPLAN <br /> Based on the site history and the analytical results of soil and <br /> round��fater samples collected during previous assessments, ASE <br /> ID <br /> prepared this �xorkplan. A site-specific health and safety plan has been <br /> previously prepared foc- the site and Nvill be present on-site at all times. A <br /> drilling perp"it from the Sail Joaquin County Public Health Services, <br /> Environmental Health Division (PHS-EHD) was previously issued for the <br /> site within the last year and is still in effect. This permit will also be on- <br /> of <br /> n- <br /> site at all times during the drilling portion of the project. ASE will also <br /> notify Underground Service Alert (USA) of the project at least 48 hours <br /> prior to subsurface drilling to have underground utility lines marked in <br /> the site vicinity. <br /> TASK 2 - COND UCT AN AREA WELL SURVEY FOR THE SITE <br /> ASE will conduct an area well survey to identify water supply wells within <br /> 2,000-feet of the site. Records from the California Department of Water <br /> Resources and the San Joaquin County PHS-EHD will be reviewed for the <br /> preparation of the area well survey. All identified wells will be located on <br /> a map. Available information on the wells including the well location, well <br /> # owner, well owner address, type of well, and year drilled will be tabulated <br /> in a table. <br /> TASK 3 - DRILL ONE SOIL BORING TO APPROXIMATELY 45-FEET BGS AND <br /> CONSTRUCT A GROUNDWATER MONITORING WELL IN THE <br /> BORING <br /> ASE will drill one soil boring to approximately 45-feet bgs at the site using <br /> a drill rig equipped with 8-inch diameter hollow-stem augers (Figure 3) . <br /> This well was specifically requested by the Regional Water Quality Control <br /> Board to monitor the vertical extent of contamination in deeper water- <br /> bearing zones in a downgradient location. <br /> The drilling will be directed by a qualified ASE geologist. Even though this <br /> location is adjacent to the location of former boring CPT-1, undisturbed <br /> soil samples will be collected at 5-foot intervals for subsurface <br /> hydrogeologic description and possible analysis. The samples will b e <br /> described by the ASE geologist according to the Unified Soul Classification <br /> �. System (USCS). The' samples will be collected in brass tubes using a split- <br /> barrel drive sampler advanced ahead of the auger tip by successive blows <br /> 574 West Grand Line Road, Tracy, CA Workplan — April 2001 <br /> -5- <br />