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£0. ;N1E44%41'WR and a deionized water rinse, replaced in the hole, and the soil sample was collected by augering. Each sample was placed in a clean plastic trash bag within a bucket and mixed thoroughly before being split into laboratory supplied glass containers appropriate for each analysis. All samples were labeled and placed in a chilled cooler with ice and transported, along with chain-of-custody ' documents to separate laboratories. The WESTON samples were transported for analysis to Sequoia Analytical Laboratory and the Board samples were transported to AnLab. Both laboratories are located in Sacramento, California and are certified by the State of California to ' perform the required analyses. During hand augering, soil samples were collected continuously for lithologic description of soil. The samples were described using the Unified Soil Classification System (USCS)and a lithologic log of each boring was produced. The boring logs are presented in Appendix A of this report. An equipment rinse sample (SB2-EB) was collected in the field to check decontamination procedures. After collection of one of the soil samples, the hand auger was decontaminated as discussed above. The equipment rinse sample was then prepared by pouring deionized water ' through the auger bucket and into a laboratory prepared container. The equipment rinse sample was placed on ice for transport to the lab along with the other samples. ' Soil samples were submitted for extraction by TCLP and for analysis using the following EPA methods: ' EPA Method EPA Method Analysis Used by WESTON Used by the Board Nitrate as N 300.0 353.2 Ammonia as N 350.3 350.1 ' After sampling was completed, the hand auger borings were backfilled and compacted with the ' soil cuttings that were removed except where clay was encountered. A dark grey clay layer was encountered in all three borings between 0.5 and 3 feet in thickness. The borings were backfilled across the clay layer with bentonite chips which were hydrated in order to prevent ' vertical migration of water along the boring. 3.0 RESULTS Table 1 provides a summary of the analytical results. The results represent leachable quantities of ammonia and nitrate (as N) in soil. The results from both the Board and WESTON split ' sample analyses have been included in the table for comparison. Results for ammonia as N and nitrate as N have been added together to simplify comparison between the two sets of samples. The Board's total leachable nitrogen results were significantly higher than the WESTON sample results. Total nitrogen results for the Board samples varied from 121% to 192% of the WESTON sample results. ' L'ROJEC"UNCWLIBSMA 3 NIM