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� t McDowell&Davis TowingV Vertical Soil Contamination Invest gation of California for hazardous materials work. The samples shall be analyzed for Total Petroleum Hydrocarbons (gasoline) by 5030 Luft. BTX&E (Benzene, Toluene, Xylene, and Ethyl Benzene) and MTBE by method 8020 and the Oxygenated Compounds. The minimum detection limits used for each analyte will be .005 mg/kg for BTX&E, 0.01 mg/Kg for the Oxygenated compounds (0.1 mg/Kg for tertiary-Butanol), and 1.0 mg/Kg for gasoline. Analyses are to be conducted by GeoAnalytical Laboratories, Inc., in Modesto, California. All rinse water will be contained on site and will be the responsibility of the property owner for disposal. Drill cuttings are not produced by this method. 2.3 Groundwater Sampling Groundwater is not expected to be encountered in this phase of work. If it is encountered and sampled a travel blank, provided by the laboratory, will accompany the sample vials from the time they are picked up from the lab to the time they are delivered to the lab. This travel blank will be listed on the Chain of Custody, but will be analyzed only if all samples contained the same contaminants. All sampling equipment, including the stainless steel Geoprobe® screen point, used by sampling personnel, will be disassembled and steam cleaned prior to commencement of sampling. These procedures will also be followed between each boring. The groundwater samples will be analyzed or extracted within 14 days according to their EPA methods. The samples shall be analyzed for Total Petroleum Hydrocarbons (gasoline), BTX&E (Benzene, Toluene, Xylene, and Ethyl Benzene) and MTBE by EPA Method 8020, and Oxygenated Compounds. The minimum detection limits used for each analyte will be .0005 mg/1 for BTX&E, 0.001 mg/l for the Oxygenated compounds (0.010 for tertiary-Butanol), and 0.05 mg/l for gasoline. Analysis will be conducted by GeoAnalytical Laboratories, Inc. in Modesto, California. 4