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After the pilot hole is advanced, the GORE-SORBER module will be removed from its reusable storage and shipping container and inserted into the pilot hole using a stainless-steel insertion rod. The sorbers, which are at the end of the GORE-SORBER module, will be pushed to the bottom of the pilot hole. The top of each GORE-SORBER module will be fastened to a cork to be tamped flush with the ground surface to seal the annulus of the hole. After installation of the GORE-SORBER modules, they will be left in place for approximately 14 days to allow sufficient time for passive soil gas sampling. After this time has elapsed, the GORE-SORBER modules will be retrieved and placed into shipping vials, and then into an ice-filled insulated chest7 pending transportation to a California certified laboratory for analysis. Collected soil gas samples will be analyzed for the following: TPHg, in accordance with Modified EPA Method 8015 or Method T03; and VOCs, in accordance with EPA Method 8260B or Method T015 . 2.7 BOREHOLE ADVANCEMENT, SOIL AND HYDROPUNCH SAMPLING 2.7.1 DIRECT PUSH SOIL SAMPLING The collection of soil samples will be performed at 25 selected locations as shown in Figure 5. In Parcel 24, nine (9) sample locations will be advanced; eight (8) in Parcel 3, and the remaining eight (8) in Parcel 4. Parcel 3 has recently been remediated8 and a building and parking areas constructed on the property. The selection and rationale of the proposed sample locations in Parcel 3 is primarily to verify site conditions along the parcel boundaries. Eight (8) of the nine (9) proposed sample locations in Parcel 24, and five (5) of the eight (8) sample locations in Parcel 4 are located coincident with the soil gas survey points, and will be used to correlate soil gas data with soil concentration data. The remaining four (4) sample locations are designed to provide data in areas other than soil gas data and/or fill in data gaps. Prior to commencement of the soil-sampling program, a grid will be established over the three parcels similar to that indicated in Table 3 and Figure 5. Each sample point will be located on the ground surface with a flag, lath or surface paint. The sample point will be labeled with the grid identification number that corresponds to the location indicated on the map, and will be used as the sample identification number with the depth of the sample also indicated. The soil samples will be collected at depths of 0.5, 2, 5, 10, 15 and 20 feet bgs using standard direct push technology. The samples will be collected in acetate, brass or stainless steel liners fitted within a sampling tool, which will be advanced into the subsurface soil to the desired depth. Sample collection will be accomplished by advancing the sampling tool with a leading drive point locked into place to prevent soil entering the sample liners. To collect a sample, an additional drive rod will be added without a locking rod (which holds the drive point in place), and the tool will be advanced approximately 24-inches. As the sample tool is advanced, the drive 7 The developer of the technology claims that placing the modules on ice after collection is not a requirement 8 Wallace Kuhl, 2005 Golden State Environmental, Inc. - 17 - Los Angeles, San Diego and Houston Revised Work Plan — Soil and GW Characterization July 2006