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Janet B . Dunlap, P.E. 14 December 2006 Page 3 during the assessment, GeoSyntec will prepare a letter report summarizing the field activities and laboratory analytical data. We have developed a task-based approach to group field activities and accomplish this work in an organized and cost-effective manner. The remainder of this letter provides a description of the proposed scope of work and a budget estimate to accomplish the work described herein (Attachment A). PROPOSED SCOPE OF WORK Task 1 . Field Work Preparation Prior to initiating field activities, GeoSyntec will prepare a Site-Specific Health & Safety Plan (SSH&SP), in accordance with the requirements of 29 CFR Part 1910. Additionally, GeoSyntec will procure the drilling subcontractor, collect and organize the field sampling equipment, and coordinate the field work with IRC personnel. Task 2 . Field Activities Based on GeoSyntec' s understanding of the work, we propose to complete the following tasks: • Using a DPT drilling subcontractor, GeoSyntec proposes to advance up to twelve, soil borings to an anticipated total depth of approximately 10 ft below land surface (BLS) . Soil samples will be screened using an OVA-FID . Based upon the soil screening results, up to six samples exhibiting the highest methane-corrected OVA-FID response will be submitted for laboratory analyses. If no OVA-FID meter responses are recorded above background levels, a minimum of three soil samples will be selected for laboratory analysis. The collected soil sample(s) will be laboratory analyzed by EPA Method 8021 (BTEX/MTBE), polynuclear aromatic hydrocarbons (PAHs) by EPA Method 8310 (three samples maximum), and total recoverable petroleum hydrocarbons (TRPH) by FL-PRO (three samples maximum). XR06212/CCR060075 IRC-Limited Petroleum Site Assessment engineers I scientists I innovators