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{ Geosyntec consultants 2. SCOPE OF WORK The objectives of this investigation are the following: 1) Physically define the Dopaco Area by performing an engineering survey; 2) Conduct an initial investigation of the distribution of toluene in soil and groundwater within the Dopaco Area in order to select locations for at least four groundwater monitoring wells; 3) Install, develop, and sample the groundwater monitoring wells to evaluate Site groundwater flow conditions and the concentrations and extent of toluene over time; and 4) Document the investigation results. in a report to the RWQCB, including recommendations for follow-up work and.a groundwater monitoring program. These objectives will be met by completing,the investigation tasks that are described below. 2.1 Task 1 —Engineering Survey As described in Section 1.3, the Site is a portion of a larger property that is owned by The Newark Group. The Site, as'defined in the settlement agreement, will be surveyed by a California licensed land surveyor and the corners will be appropriately marked (e.g., nail and shiner, survey medallion, etc.). 2.2 Task 2—Initial Investigation The proposed initial investigation will include cone penetrometer testing (CPT), membrane interface probe (MIP) screening, and depth discrete groundwater sampling at the locations shown on Figure 4. The investigation will be performed in one field effort, with the CPT and MIP work performed first, followed by the groundwater sampling. Soil and groundwater sampling performed to date has been focused on the areas of the former USTs and a large portion of the Site has not yet been tested for toluene. The results of this investigation will be used to evaluate the distribution of toluene across the Site, in order to select the locations of the groundwater monitoring wells that are proposed below in Task 3. Final Work Plan.doe 5 27 June 2012