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R" KLEINFELDER <br /> The soil probes will be advanced using a truck mounted geoprobe rig. The geoprobe utilizes a <br /> pneumatically driven stainless steel push probe assembly for the advancement of the borehole. <br /> Soil samples will be collected at approximately 1 foot, 5 feet, 10, 15, 20, and 25 feet bgs. The <br /> soil samples will be field screened with a photoionization detector(PID). <br /> While sampling, an experienced environmental geologist will classify the subsurface soils <br /> generated by the advancing push probe. Soil samples will be collected by cutting out the desired <br /> interval from a continuous core interval (successive 4 foot acetate liners) and sealing the ends <br /> with Teflon sheeting and tight fitting plastic caps. Each sample will be individually labeled and <br /> placed in an iced cooler pending transport to the analytical laboratory under chain of custody <br /> protocols. The borings will be closed in accordance with San Joaquin County PHS/EHD <br /> guidelines by grouting to the surface. No further concrete or asphalt patching is proposed to <br /> finish the probe locations at this time. Any waste soil generated by the geoprobe and rinseate <br /> water from the decontamination procedures will be contained and left on site pending laboratory <br /> analysis of the soil samples. <br /> The 3 soil samples collected from each of the 3 probe locations will labeled, logged on a chain of <br /> custody, and stored in an iced cooler for transportation to the analyzing laboratory. A total of 9 <br /> soil samples is proposed to be analyzed at this time. <br /> Laboratory Analysis <br /> A total of 9 soil samples will be collected from the soil probes. The soil samples will be <br /> submitted to a laboratory certified by the State of California for the proposed analyses. At this <br /> time Kleinfelder proposes to use Sequoia Analytical (Sequoia) of Sacramento, California. The <br /> soil samples will be analyzed for: <br /> • Volatile Hydrocarbons by EPA Method 8260 <br /> • Fuel Fingerprint by EPA Method 8015M <br /> • CAM17 Metals by EPA Methods <br /> The samples will be analyzed on standard 10 day laboratory turnaround time. Sample analysis <br /> can be expedited for additional fees upon request. <br /> 2.3 Geophysical Survev <br /> A limited investigation will be performed in the area of a reported possible underground storage <br /> tank (UST). The investigation will be performed utilizing a magnetic geophysical survey <br /> method. The magnetic survey will aid in possibly determining subsurface structure locations <br /> without any physical intrusive methods. <br /> 02 01PhOP.ENV/STO2P112 Page2of6 <br /> Copyright 2002,Kleinfelder,Inc. <br /> September 30,2002 <br />