SITE INFORMATION AND CORRESPONDENCE FILE 1

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There are two quick disconnect sampling ports in each well head which can be used to sample either vapors (concentration in ppm) or pressure (vacuum in inches of H2O). The lower one is at the top of the well casing and measures or samples the air dilution. The higher one is at the top of the extraction tube and measures or samples the extraction vacuum or vapors. System Turn On and Baseline Performance Installation consisted of connecting all piping, electrical and phone lines. In addition a seal water makeup line was added to provide a constant supply of sealwater to the liquid ring pump. Repairs were also made to items that had minor shipping damage. After an initial break-in period the liquid ring pump influent and dilution valves were adjusted to begin vapor and liquid recovery. This test was conducted by first closing all the well head valves except for the one at the test well which received maximum system vacuum (> 100" H2O). Then vacuum readings were collected at that well to determine the maximum vacuum that a particular well could develop. Each well was tested in turn. The results of this test are presented in Table 1. Table 1. Initial Vacuum Developed At Each Well Well Y.D. Wellhead Vacuum (" HZO) Casing Vacuum (" H20) VE-1 I 2.8 I NA MW-1 >100 >100 MW-2 I 82 68 MW-3 >100 I 90 MW-5 I 20 5 MW-7 24 12 MW-8 I >100 >100 MW-9 .20 3.2 MW-10 I 34 20 For this test the bioslurp tube was modified by disconnecting all the vertical length of tube within the well except for a five foot section of slurptube which was left attached to the wellhead compression fitting to assure a seal. Vacuum readings were collected via a magnehelic gauge attached to the upper(wellhead vacuum) and lower (casing vacuum) sampling ports respectively. This test configuration assured that slurp tube was above the top of the water table and as such not affected by water entering the tube. 385