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' KLEINFEL <br /> �`■ DER <br /> ' 6. CONCLUSIONS AND RECOMMENDATIONS <br /> ' Kleinfelder conducted this limited phase II environmental site assessment of selected areas of the <br /> proposed Tracy Multimodal Station to evaluate the presence of selected contaminants. A total of <br /> fifteen (15) soil samples and six groundwater samples were collected from six drilled Hydropunch <br /> IITM soil borings and one combination environmental/geotechnical boring. Thirteen (13) soil and <br /> six groundwater samples were subsequently analyzed for selected analytes based on suspected <br /> contaminants that might be present. <br /> 6.1 SOIL ASSESSMENT <br /> In general, concentrations of the analytes in the seven sample locations ranged as follows. Where <br /> noted,ND indicates none detected at the detection limit noted. <br /> • Fuel Fingerprint/Total Extractable Petroleum Hydrocarbons: <br /> • JP-4 [none detected] <br /> • JP-5 [none detected] <br /> • Kerosene [none detected] <br /> • Diesel [none detected] <br /> • Lubricating Oil [none detected] <br /> ' Unidentified Extractable Hydrocarbons [ND to 87 mg/kg] <br /> • CAM 17 Metals,ND except: <br /> • Barium [91 to 250 mg/kg] <br /> ' Chromium [19 to 33 mg/kg] <br /> • Cobalt [7.3 to 12 mg/kg] <br /> • Copper [2.5 to 42 mg/kg] <br /> • Lead [ND to 50 mg/kg] <br /> • Mercury [0.032 to 0.34 mg/kg] <br /> • Nickel [25 to 43 mg/kg] <br /> ' Thallium [ND to I 1 mg/kg] <br /> • Vanadium [25 to 38 mg/kg] <br /> • Zinc [35 to 95 mg/kg] <br /> ' • Volatile Organics by EPA Method 8260 <br /> • Toluene [ND to 0.11 mg/kg] <br /> • Methylene Chloride [0.85 to 2.1 mg/kg] <br /> • Semi-Volatile Organics by EPA 8270 (Polynuclear Aromatic Hydrocarbons) [none detected] <br /> 204054-0 LEO 1/2018R299 Page I 1 of 15 <br /> ' 0 1998,Kleinfelder, Inc. May 8, 1998 <br />