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A prior survey for nearby well locations, conducted by Advanced GeoEnvironmental, Inc. (AGE) in 2000, reports that none are generally located within a 1,000 foot radius, but that several exist just outside this radius(AGE, 2000). 4.0 FIELD ACTIVITIES 4.1 Direct Push Borings—Soil Sample Collection On June 10 & 11, 2004, eight soil borings were advanced to a depth of approximately 20 to 25 feet with a truck-mounted, hydraulically operated, GEOPROBE® direbt-push rig. The locations of these borings, designated B1 through B8, are shown on attached Figure 2. Detailed drawings of each specific area in which borings were advanced are also attached as Figures 3-B. Soil samples were collected in each boring at approximate five-foot depth intervals. Samples were obtained with a 24-inch long piston soil sampler lined with 1.0-inch diameter vinyl acetate tubing. Further details of the soil sample collection procedures are provided in attached Appendix A. Details of the specific soil lithology encountered in each individual boring are provided on the boring logs in attached Appendix B. All soil was logged in general accordance with the Unified Soil Classification System (USCS). 4.2 In-Situ Groundwater Sampling Upon advancing each boring into the shallow groundwater-bearing zone, a temporary well screen (.0.010- inch factory slotted) was installed into the groundwater zone to facilitate the collection of an in-situ groundwater sample. Groundwater samples were collected by installing a length of new, dedicated polypropylene tubing down the push rods to the depth of the temporary well screen. A peristaltic pump was then used to raise the groundwater to the surface, at which time it was collected in a laboratory-approved one-liter amber bottle (with I'i2SO4 preservative) and 40-milliliter glass VOA vials with TEFLON septum lids. During the sampling, observations of groundwater odor and color were also noted. This information is summarized below: - ':r i. - - - �� C:�-Y.'��.� -:IRS.r v:::::.v �,F .:... :::.:_:::,::::::::::::::::.... .:. :.,:..ter:.:..:::.::•:n•:.:r:;•::::::.:•:•.-.,,..>:.:::::;:ri rr•?::�'h•:;•: BORING NO. COMMENTS B1 Slight hydrocarbon odor in water. No discoloration. B2 Slight hydrocarbon odor in water. No discoloration. B3 Moderate hydrocarbon odor and grey discoloration in water. B4 No odor or discoloration in water. B6 No odor or discoloration in water. B6 No odor or discoloration in water. B7 Faint hydrocarbon odor and grey discoloration in water. B8 Faint hydrocarbon odor and grey discoloration in water. 4.3 Soil Litholocgv Soil types encountered during the field investigation were predominantly sand/silt mixtures, clay/silt mixtures, and occasional units fine sand. Details of the lithology encountered in each individual soil boring are provided on the boring logs in attached Appendix S. Soils were logged in general accordance with the Unified Soil Classification System (USCS). Proj. No.: 04483-01 2 of 7 AEM