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12 April 1996 <br /> AGE-NC Project No. 95-0137 <br /> Page 5 of 6 <br /> 9. Log borings in accordance with the Unified Soil Classification System. <br /> 10. Selected soil samples will be analyzed for TPH-g, TPH-d and BTE&X in accordance with the <br /> appropriate EPA methods. <br /> 11. Cuttings and rinseate generated during drilling activities will be placed on plastic and stored <br /> on-site in an area inaccessible to the general public. Disposal alternatives will be evaluated <br /> based on results of laboratory analyses. Convert the bore(s) as a two-inch diameter <br /> monitoring well(s) in accordance with the well design in Figure 3. <br /> 12. Develop new monitoring wells utilizing a submersible pump until water is essentially sediment <br /> free. <br /> 13. Survey the top of each well casing to the nearest 0.01-inches to determine the elevation <br /> relative to existing wells. <br /> 14. No sooner than 48 hours after installation of ground water monitoring wells, measure to the <br /> nearest 0.01 foot, the static water level in the new wells. <br /> 15. Using a dedicated bailer or submersible pump, surge and purge all wells. At least three well <br /> volumes of water will be removed from each well to stabilize temperature, pH, and <br /> conductivity; stabilization parameters will be measured at one-.}.yell volume intervals. Ground <br /> water samples will be collected using polyethylene disposable bailers; samples will be <br /> collected in 40-m1 VOA vials preserved with hydrochloric acid. <br /> 16. Label and log water samples on a chain-of-custody form. <br /> 17. Store the samples in a chilled container and transport under chain-of-custody procedure to <br /> a state-certified laboratory for analysis. Water samples will be analyzed for TPH-g, TPH-d <br /> and BTE&X, in accordance with EPA methods 5030/8015, 5030/8015 and 602, <br /> respectively. <br /> 18. Store purged water in properly labeled D.O.T. model 17H 55-gallon drums on-site in an area <br /> inaccessible to the general public, pending analytical results. <br /> 4.3. REPORTING <br /> A report detailing the results of the investigation will be prepared. The reportwill be in a format <br /> acceptable to the PHS-EHD and CVRWQCB. The report will be reviewed and signed by a California <br /> Registered Geologist. <br />