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Soil samples for low- or non-volatile compounds as TPHd, TPHo, SVOCs, metals, PCBs and pH will be collected using the remaining soil within the first sample sleeve. The exposed ends of the sleeve will be capped with Teflon sheeting and secured with plastic end caps. The sample will then be labeled, placed into a re-sealable plastic bag, and put into the insulated chest filled with ice pending transport to a California certified laboratory for analysis. If insufficient soil sample is collected, either an additional sample will be collected from the borehole beginning where the last sample was collected, or the rig will be moved over three (3) feet from the initial borehole and sampling will continue at the target depth. Soil from the second (middle) sleeve will be placed into a re-sealable plastic bag and set aside for approximately two (2) to five (5) minutes, after which time a measure of VOCs will be made using a portable PD or equivalent organic vapor analyzer. The soil will then be described by a California Professional Geologist, in accordance with the USCS method of soil description. Logs of the boreholes will be prepared by or under the direct supervision of the Professional Geologist responsible for this project. During sampling, a mobile laboratory may be used to analyze the samples directly onsite. If used, additional sampling may be advanced at other locations to further delineate petroleum hydrocarbons and/or VOCs that exceed regulatory limits. The necessity for additional sampling at other locations may also be indicated by high VOC measurements on the PD. The selection of additional sample locations will be at the discretion of the Professional Geologist responsible for this project. Collected soil samples will be analyzed at different depths for one or more of the following: TPHg, in accordance with Modified EPA Method 8015 and Method 5035 preservation; TPHd and TPHo, in accordance with Modified EPA Method 8015B; VOCs, in accordance with EPA Method 8260B and Method 5035 preservation; SVOCs, in accordance with EPA Method 8270C / 8310 (PAHs); PCBs, in accordance with EPA Method 8082; PH, in accordance with EPA Method 9040 / 9045; and Total metals (no hexavalent chrome), in accordance with EPA Method 7470 / 7471. Soluble metals, in accordance with WET, may be performed for those samples where the TTLC12 concentration exceeds 10x the STLC I3 limit. Although six (6) soil samples will be collected at each grid sample location, the samples initially will not be analyzed for the above PCOCs and COCs. Instead, a systematic analytical 12 Total Threshold Limit Concentration (regulatory limit that defines a characteristic of hazardous waste) 13 Soluble Threshold Limit Concentration (regulatory limit that defines a characteristic of hazardous waste) Golden State Environmental, Inc. - 22 - Los Angeles, San Diego and Houston Revised Work Plan — Soil and GW Characterization July 2006