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rs <br /> WORK PLAN <br /> BASELINE SOIL AND GROUNDWATER INVESTIGATION <br /> FUTURE SAFEWAY STORE #1769 GAS STATION SITE <br /> 2782 COUNTRY CLUB BLVD <br /> STOCKTON, CALIFORNIA <br /> September 26, 2000 <br /> 1.0 SITE HISTORY <br /> The site is located at 2782 Country Club Boulevard at Fontana Avenue in <br /> Stockton, California (see attached figures). This site is reportedly undeveloped <br /> and has been rough-graded in preparation for new commercial construction. A <br /> residence previously occupied the site. Safeway Inc. intends to construct a new <br /> Safeway store at this location equipped with a Safeway gas station. In order to <br /> obtain a baseline evaluation of subsurface conditions prior to the installation and <br /> operation of their underground fuel tanks, Safeway proposes to collect soil and <br /> groundwater samples from the site (gas station pad area). No historical sources <br /> for on-site contamination are known to exist. However, known petroleum <br /> releases from off-site nearby gasoline stations to the north of the site have <br /> impacted groundwater in the area. The regional groundwater flow direction is to <br /> the southwest; however, the groundwater flow direction at the nearby gas station <br /> release sites has been calculated to the northeast. <br /> 2.0 PROPOSED INVESTIGATION <br /> Safeway Inc. retained HSI GeoTrans to complete the subsurface baseline soil <br /> and groundwater assessment at the above site. HSI GeoTrans proposes to <br /> complete a total of four soil borings (SB-1 through SB-4) at the proposed gas <br /> station pad (see attached figure). The borings will be drilled to a maximum depth <br /> of 30 feet below ground surface (bgs) or first groundwater; whichever is <br /> shallower. Depth to groundwater is anticipated within 15 feet bgs. Soil samples <br /> will be collected at 5-foot intervals from each soil boring for field screening with <br /> an organic vapor monitor(OVM) and potential laboratory analysis. Based on <br /> field screening results, one soil sample from two of the four boring locations (total <br /> of two soil samples)will be submitted for laboratory analyses. In addition, one <br /> grab groundwater sample will be collected at each boring location (total of four <br /> groundwater samples) and submitted for laboratory analyses. <br />