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lyzed by Central Coast for the 10 VOCs specified in the Guidelines. <br /> The lower detection limits for these tests are listed under "Air" in <br /> Table 1 of Appendix A. Appendix D contains the analytical methods for <br /> determining the presence of the 10 VOCs specified in the Guidelines. <br /> 2.5 RESULTS <br /> Analytical results are summarized in Tables 2, 3, and 4. Complete <br /> analytical reports are included in Appendix E. Appendix F presents <br /> the field information, including date and time of sampling, landfill <br /> gas well purge volumes and times, and names of sampling technicians <br /> for each landfill gas and integrated surface walk sample. Appendix G <br /> presents chain-of-custody records for the samples. <br /> 2.5.1 MaJ or Landfill Gas Com on{�ents <br /> The gas monitoring wells located in areas with buried refuse, con- <br /> tained methane from about 6.6 to 40 percent (Table 2) . Nitrogen in <br /> the wells ranged from 26 to 65 percent. Carbon dioxide ranged from 20 <br /> to 35 percent by volume. By-products of anaerobic degradation, <br /> methane and carbon dioxide are generally the major landfill gas com- <br /> ponents in areas of decomposing refuse. <br /> 2.5.2 Volatile Organic Com op unds <br /> The gas monitoring well samples contained vinyl chloride, benzene, <br /> 1,2-dichloroethane, methylene chloride, tetrachloroethylene, <br /> 1, 1,1-trichloroethane, trichloroethylene, and chloroform; ethylene <br /> dibromide and carbon tetrachloride were not detected (see Table 3) . <br /> Vinyl chloride and chloroform were only detected in Well W-5. <br /> 2.5.3 Landfill Gas Emissions <br /> One integrated surface walk was conducted at the site. Analytical <br /> results for the surface walk sample (SW-1) are presented in Table 4. <br /> PJ9 9390304.00D 2-5 Rev. 0 09/20/88 <br />