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3.4 RESULTS <br />Table 5 summarizes the analytical results. Complete analytical <br />reports are included in Appendix E. Appendix F contains field infor- <br />mation including EMCON's sample identification number and date and <br />time of sample collection. Wind data recorded during ambient air <br />sampling are included in Appendix G. The data indicate that the wind <br />was predominantly from west to northwest with an average wind speed of <br />3.8 miles per hour. <br />Benzene, methylene chloride, tetrachloroethylene, carbon tetrachlo- <br />ride, 1,1,1 -trichloroethane, and trichloroethylene were detected in <br />one or more ambient air samples. Benzene, carbon tetrachloride, and <br />1,1,1 -trichloroethane concentrations were at or below their respective <br />regulatory detection limits. Methylene chloride, carbon tetrachlo- <br />ride, and trichloroethylene were detected only in downwind ambient air <br />samples. The concentrations of the other VOCs (benzene, tetrachloro- <br />ethylene, and 1,1,1 -trichloroethane) were relatively similar in upwind <br />and downwind ambient air. <br />PJ9 9390405.00D 3-2 Rev. 0 09/07/88 <br />Emcon Associates <br />