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• <br /> 16 June 2003 <br /> AGE-NC Project No. 03-1042 <br /> Page 5 of 5 <br /> chilled container under ice, to be transported under chain-of-custody procedure to a DHS-certified <br /> laboratory. <br /> Soil in the remaining brass sleeves will be visually classified by an AGE geologist in accordance <br /> with the Unified Soil Classification System(USCS).Additionally,the soil will be field-screened for <br /> the presence of volatile organic compounds using an organic vapor meter (OVM), equipped with <br /> photo-ionization detector(PID). <br /> 4.3. EQUIPMENT DECONTAMINATION <br /> Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. All probing rods will be cleaned prior to <br /> advancement at each probe boring location. <br /> 4.4. BORING ABANDONMENT <br /> The probe borings will be permanently sealed to prevent vertical migration of potential <br /> contaminants. Soil borings shall be abandoned by backfilling with portland cement from the total <br /> depth to surface grade. <br /> 5.0 REFERENCES <br /> California Division of Mines and Geology, 1981. Regional Geologic Map Series, Sacramento <br /> Quadrangle. <br /> Olmsted,F.H.,and G.H.Davis, 1961,Geologic Features and Groundwater Storage Capacity ofthe <br /> Sacramento Valley, California, U.S. Geological Survey Water Supply Paper 1497, 241p. <br /> Advanced GcoEnvironmental, Inc. (AGE) Excavation and Sampling Report 10 August 1998, <br /> 14210 West State Route Four, Stockton, California. <br />