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LFR Levine-Fricke Revised The decision to terminate the test will be based primarily on the level of equilibration of pressure with each of the momtonng wells However, it is possible that the constant rate test may run for as long as 8 to 24 bows or as little as 1 hour Equilibration in the monitoring wells is defined as less duan 10 percent change between readings for two consecutive measurements taken 15 minutes apart If the levels do not appear to be equilibrating after several hours of operation, the data will be reviewed and a decision will be made in the field as to whether to continue the test As shown in Table 1, field VOC morulonng will be conducted more frequently during the early portion of the constant rate test to establish an adequate data set of VOC removal rates at the beginning and end of the test A laboratory sample will be collected at the end of each constant rate test. Vacuum responses will also be recorded at each monitoring well more frequently at the beginning of each test, decreasing at an approximate logarithmic rate over time because the rate of vacuum response typically decreases with time at a corresponding rate Data collected during the step and the constant rate tests will be analyzed as discussed in Section 5.5, Phase I Data Analysis 5.4 SVE Fest Equipment A range of extraction and inStrumeritation equipment will be used to perform the SVE • pilot test The extraction blower, piping, and treatment equipment will be configured to provide maximum flexibility so that a range of tests can be performed Mayor test equipment is described below. 5.4.1 Blower Assembly An SVE blower assembly will be used to pull vacuum from the subsurface This system will consist of a blower capable of providing a range of vacuum and flow rates up to i the maximum specified capacity, as described below A 100-SCM positive displacement style blower will be used during the test_ The blower system will include a dilution air inlet and a recycle loop for mr-reased operational flexibility The adjustable dilution air unlet valve will allow ambient air to be drawn into the blower system inlet to dilute vapor extracted from the SVE well This will be necessary if VOC vapor concentrations exceed the operational capabilities of the emission control devices A pitot tube and rotameter type air flow meter will measure the dilution air flow rates. A recycle loop will allow the discharge from the blower to be recycled back to the blower inlet The recycle loop can be used to decrease the overall flow rate extracted from the SVE wells without decreasing pressure A moisture separator and a particulate air filter will be positioned upstream of the blower to remove entrained water or particulates from the air stream. Page 16 wp-svEGS-Ludi mv4U123 act irr 02-PiOT d 82T0t790GOET 01 9060 2S9 019 3X3184 3NIO31 2,W1 ad OS 9T z0, 60 Jnf