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April 15, 2009 3 Reference No. 17386-009 3.1 Oil/Water Separator One soil boring will be installed adjacent to the inlet and the outlet of the oil/water separator to assess potential impacts to the Site, utilizing a Geoprobe® direct push method, for a total of two borings. The borings will be advanced to the water table or a depth of 10 feet bgs if groundwater is not encountered. Soil samples will be collected continuously in 4-foot intervals and screened utilizing a photoionization detector (PID). Soil samples will be selected for laboratory analysis based on either the sample from greater than 5 feet bgs which exhibits the highest PID reading, the sample from the groundwater table interface, or the sample from the total depth (if no elevated PID readings or groundwater are encountered). The samples will be submitted for laboratory analysis of Total Petroleum Hydrocarbon as Gasoline Range Organics (TPH-GRO) and Total Petroleum Hydrocarbons as Diesel Range Organics (TPH-DRO) via California Methods and Volatile Organic Compounds (VOCs) on a 72-hour turn around time (TAT), with polynuclear aromatic hydrocarbons (PNAs) on hold pending review of TPH results. If groundwater is encountered, one groundwater sample will be collected from the boring and analyzed for the same parameters as above. 3.2 Abandoned In-Ground Hydraulic Lifts One soil boring will be installed adjacent to each abandoned in-ground hydraulic lift to assess potential impacts to the Site utilizing a Geoprobe® direct push method, for a total of seven borings. The borings will be advanced to the water table or a depth of 10 feet bgs if groundwater is not encountered. Soil samples will be collected continuously in 4-foot intervals and screened utilizing a PID. Soil samples will be selected for laboratory analysis based on either the sample from greater than 5 feet bgs which exhibits the highest PID reading, the sample from the groundwater table interface, or the sample from the total depth (if no elevated PID readings or groundwater are encountered). The samples will be submitted for analysis of TPH-GRO and TPH-DRO via California methods on a 72-hour TAT, with PNAs on hold. If groundwater is encountered, one groundwater sample will be collected from the boring and analyzed for the same parameters as above. 3.3 Absorbent Material and Rags Near Transformer Following cleaning of the area and removal of absorbent material and rags by others, if the concrete surrounding the transformer is observed to be cracked or damaged, one soil boring will be installed in the area to assess potential impacts to the Site, utilizing a Geoprobe® direct push method. If no damage or deterioration to the concrete is observed, a soil boring will not be advanced here. If installed, the boring will be advanced to the water table or a depth of 10 feet bgs if groundwater is not encountered. Soil samples will be collected continuously in 4-foot intervals and screened utilizing a PID. Soil samples will be selected for laboratory analysis based on either the sample from greater than 5 feet bgs which exhibits the highest PID reading, the sample from the groundwater table interface, or the sample from the total depth (if no elevated PID readings or groundwater are encountered). In addition, a second sample may be collected to document soil conditions from near-surface soils beneath the concrete. The samples will be submitted for analysis of TPH-GRO and TPH-DRO via California methods, VOCs, and PCBs on a 72-hour TAT, with PNAs on hold. If groundwater is encountered, one groundwater sample will be collected from the boring and analyzed for the same parameters as above. The location of the Site is shown on Figure 1 and the proposed soil boring locations are shown on Figure 2. Encore Environmental Consortium, LLC