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2.2 Scope of Work <br /> Del Tech will complete the shallow hand auguring in the excavated area and the angular boring <br /> along the building. The deep borings would be completed by Osterburg & Stewart drilling <br /> company of Modesto, they will use a truck mounted hollow stem auger drilling rig to complete <br /> the borings.. The subsurface geologic investigation and logging of the soil borings will be <br /> completed by Tim McDonald of Geological Technics Inc. of Modesto, under the direct <br /> supervision of Ray Kablanow, registered geologist. All of the cuttings produced from this event <br /> will be placed on a sheet plastic consisting of 6 mil polyurethane. Soil sampling intervals for <br /> the deep borings will be collected in 5 foot intervals and screened with a photo ionization <br /> detector for the presence of volatile aeromatics. These soil samples will also be logged for their <br /> geological characteristics. Samples submitted to the laboratory will be analyzed for the presence <br /> of TPH- GasolineB.T.X.E. (EPA Method 8015 Mod.), Total Recoverable Petroleum <br /> Hydrocarbons TRPH (C5-C40), Halogenated Hydrocarbons (EPA Method 80 10) and Five Metals <br /> (Cadmium, Chromium, Lead, Nickel and Zinc). Each of these samples will be selected from <br /> appropriate horizons representing the vertical geologic strata and by held indications of <br /> contamination. Four soil samples will be selected from the anticipated eight samples collect in <br /> each deep boring and submitted to a state certified laboratory for analysis. The shallow soil <br /> borings will also be logged in a five foot interval and the bottom sample will be submitted to the <br /> laboratory for the same analysis as the deeper borings. All of the borings will be pressure grouted <br /> with neat cement and finished off to grade with the use of a trimmie pipe. Each of the samples <br /> will be extracted with a driven tube sampler utilizing 2 x 6 inch brass tubes. To ensure sample <br /> integrity all drilling equipment and the drive sampler will be decontaminated with a steam cleaner <br /> between each sample point. The brass tubes containing the soil samples will be sealed with teflon <br /> tape, clean end caps, duct tape, labeled and placed in a chilled ice chest with a Chain-of-Custody <br /> and transported to Sherwood Analytical Laboratory in Hilmar, California; DHS Certification <br /> #1400. Each sample will be analyzed for total petroleum hydrocarbon products (in the gasoline <br /> range) by modified EPA Method 8015, minimum detection limit 1 mg/kg, Benzene, Toluene, <br /> Ethyl Benzene, Total Xylene EPA Method 8020 minimum detection limit 3 ug/kg., Total <br /> Recoverable Petroleum Hydrocarbons TRPH EPA Method 3540/8015 Mod. minimum detection <br /> limit 5.0 mg/Kg,Halogenated Hydrocarbons EPA Method 8010 minimum detection limit 5 ug/Kg <br /> 4 <br />