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06 August 2003 <br /> AGE-NC Project No. 03-1045 <br /> Page 6 of 6 <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br /> transported under chain-of-custody procedure to a DHS-certified laboratory.Each sample container <br /> will be labeled with the boring designation, time, date and sampler's initials. <br /> 4.2. 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 /> 4.3. BORING ABANDONMENT <br /> All probe borings will be permanently sealed to prevent vertical migration ofpotential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br /> 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 GeoEnvironmental,Inc. <br />