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02 June 2006 <br /> AGE-NC Project No. 06-1433 <br /> Page 5 of 5 <br /> Grab ground water samples will be collected using a Geoprobe water sampling assembly fitted with <br /> a pre-cleaned one-inch 0.010-inch slotted temporary well screen.Each ground water sample will be <br /> extracted by lowering Teflon tubing through the hollow center of the push rods into the screen <br /> section. <br /> Samples for BTEX,VOCs and TPH-g analysis will be collected in laboratory-supplied,40-m1 VOA <br /> vials, which may contain 0.5-m1 of hydrochloric acid as sample preservative. Samples for TPH-d <br /> analysis will be collected in laboratory-supplied one-liter glass containers. The labeled containers <br /> will be placed in a chilled container under ice and transported under chain of custody to a DHS- <br /> certified laboratory. <br /> 5.4. 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 /> 5.5. BORING ABANDONMENT <br /> All probe borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br /> grade. <br /> 6.0 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 />