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W(Cul[ , <br /> Southwest, line. <br /> 9.0 LABORATORY ANALYSIS <br /> A total of 12 soil samples and 3 groundwater samples were submitted for laboratory analyses. <br /> The soil samples were submitted to a State-certified laboratory for analysis of NH3-N by EPA <br /> Method 350.2 and pH by EPA Method 9045. The water samples were analyzed in the field for pH <br /> and submitted to a State-certified laboratory for analysis of NH3-N by EPA Method 350.2. The <br /> soil sample analytical results are summarized in Table 1, and the results of the NH3-N and pH <br /> analyses of the soil samples are depicted on Figure 5. The groundwater sample analytical results <br /> are summarized in Table 2, and the results of the NH3-N and pH analyses of the water samples <br /> are depicted on Figure 6. A copy of the laboratory analytical reports and the chain of custody <br /> records are included in Appendix B. <br /> NH3-N concentrations in the soil samples collected in the soil borings at 5 feet bgs ranged from 7 <br /> to 8 mg/kg, at 10 feet bgs from 46 to 158 mg/kg, at 15 feet from 14 to 32 mg/kg, and at 20 feet <br /> bgs from 3 to 6 mg/kg. No ammonia odors from the soil samples were noted. The pH values in <br /> the soil samples collected in the soil borings at 5 feet bgs ranged from 7.59 to 8.3 0, at 10 feet bgs <br /> from 7.07 to 7.43, at 15 feet bgs from 7.60 to 7.97, and at 20 feet 8.36 to 8.95. <br /> NH3-N concentrations in the water samples collected from the three on-site and two near-by <br /> monitoring wells ranged from non-detect with a method detection limit (MDL) of 0.200 mg/l to <br /> 0.393 mg/l. The pH values of the water samples ranged from 6.9 to 7.2. <br /> 10.0 DISPOSITION OF DRILL CUTTINGS AND WASTE WATER <br /> Seven drums of drill cuttings were generated during the drilling operation and one drum of waste <br /> water was generated by steam-cleaning the augers. During the well development approximately <br /> 600 gallons of water were purged from the five wells and shipped under Uniform Hazardous Waste <br /> Manifest 22970533 to Riverbank Oil Transfer Facility in Riverbank, CA (CAL000190816) by <br /> American Valley Waste Oil hauler (CAL000827878). Each drum was labeled with the site name <br /> and address, generation date, and type and source of the material it contained. The seven drums of <br /> soil cuttings are pending shipment as non-hazardous to Forward Landfill in Stockton, California. <br /> 725.PRI.00 Page 7 December 4,2003 <br />