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3. SCOPE OF WORK <br />The objectives of this investigation are to: <br />- Define the vertical and horizontal distribution of gas plant <br />residues in soil and groundwater at the Tracy site. <br />- Identify the chemical composition of any gas plant residues <br />encountered at the Tracy site. <br />- Define those hydraulic characteristics of the uppermost aquifer <br />that would affect the movement of gas plant residues. <br />1 3542a/BAV102 6 <br />- <br />Estimate the potential for migration of gas plant residues offsite. <br />The <br />field activities for this investigation are: <br />- <br />Collect, sample and analyze soil samples from approximately 30 shallow <br />and 1 deep soil borings. <br />- <br />Install four new monitoring wells. <br />- <br />Collect and analyze one round of groundwater samples from the four new <br />and six existing monitoring wells. <br />- <br />Perform three slug tests. <br />A final <br />report will be prepared for submittal to the appropriate state and <br />local <br />agencies. This report will include: <br />- <br />A description of the site, site history, and present site use. <br />- <br />Detailed boring logs for each borehole and as -built monitoring <br />well construction drawings. <br />- <br />A description of the regional and site-specific geology and <br />hydrogeology obtained from literature review and site boring logs. <br />- <br />A description of hydrologic characteristics of the uppermost aquifer, <br />based on aquifer tests (slug tests and water level measurements) <br />performed at selected monitoring wells. <br />- <br />An areal site map and cross-sectional maps identifying any areas which <br />contain gas plant residues. <br />- <br />Summary tables of laboratory analyses of soil and water samples, <br />and certified laboratory reports. <br />- <br />Quality control results, including validation of data collected. <br />' <br />- <br />An interpretation and discussion of the results. <br />1 3542a/BAV102 6 <br />