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�• 3.0 RECOMMENDATIONS <br /> Potential environmental impacts for Audit area III include pesticides in soil and groundwater <br /> from past agricultural use, heavy metals in soil and groundwater from possible receipt of river dredge <br /> tailings, petroleum coke, and copper concentrate storage, and lowered pH values in soil from bulk coal <br /> stockpiling operations. There is also potential for hydrocarbons and volatile organic compounds in soil <br /> and groundwater beneath the site due to lubricant storage and fueling operations and the close proximity <br /> of the Port of Stockton fuel terminal. The site is presently developed as a bulk materials distribution <br /> ' facility. <br /> The following recommendations are presented based on past land use and current on site <br /> operations: <br /> ' • To evaluate potential impacts on soil from bulk materials stockpiling and handling, soil <br /> I borings should be conducted near the petroleum coke and former copper concentrate <br /> stockpiles and beneath the conveyors. Soil samples should be analyzed for CAM metals <br /> (STLC); <br /> ( � • To evaluate potential impacts on soil from drum storage and fueling operations, soil <br /> borings should be conducted near each of these areas. Soil samples should be analyzed <br /> for purgeable and purgeable aromatic halocarbons, and total petroleum hydrocarbons; <br /> • I To evaluate potential impacts in groundwater from current operations, two monitoring <br /> wells should be installed. The wells should be placed both upgradient and <br /> Idowngradient of existing operations. Groundwater samples should be analyzed for <br /> CAM metals, chlorinated and organophosphate pesticides, total petroleum <br /> hydrocarbons, purgeable and purgeable aromatic halocarbons. <br /> • If the establishment of baseline conditions is desired for this parcel, soil and <br /> groundwater analysis should be expanded to include chlorinated and organophosphate <br /> pesticides, elemental sulphur, and sulphates. Groundwater samples should also be <br /> analyzed for sulfides. <br /> 1 <br /> • PSA04.007 14 <br />