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KEI-P89-1104 .P3 April 4, 1990 Page 3 gallon drums and, depending on the laboratory results, disposed of by a licensed waste hauler or dumped into the City storm drain system. A water sample will be collected immediately following the purging activities using a clean Teflon bailer and will be promptly decanted into 40 ml VOA vials and/or one liter amber bottles as appropriate. Vials and/or bottles will be sealed with Teflon-lined screw caps, labeled and stored in a cooler on ice for delivery to a state certified laboratory. Properly executed Chain of Custody documentation will accompany the water sample. The sampling bailer will be cleaned with soap and a clean water rinse prior to use. The water sample will be analyzed by Sequoia Analytical Laboratory in Redwood City, California, a state certified laboratory, for TPH as gasoline and BTX&E using EPA analyti- cal methods recommended by the RWQCB, as specified in the Tri-Regional guidelines. Analytical results will be presented in tabular form, showing sample depth, results and detection limits. D. After the water sample has been satisfactorily collected, the well casing will be drilled out using 12-inch O.D. hollow stem auger (approximately 6-1/4 inch I.D. ) to the total depth of the casing. The casing will be pulled either as on continuous section or in separate pieces. All well abandonment activities will be conducted using West Hazmat of Rancho Cordova, California, a licensed water well drilling contractor. E. After the casing has been pulled, the well will be redrilled to the full depth of the well. The well will be abandoned by placing a tremie pipe to the base of the well and pressure grouting the well from the total depth to the surface using neat cement or a cement-bentonite mix. F. All soil materials that rise to the surface as a result of the grouting activities will be collected and stored in DOT- approved drums on-site. All soil and water generated during well destruction activities will be properly disposed of depending on the results of laboratory analyses. G. The vicinity of the water well will be restored to its original condition with the placement of asphaltic concrete.