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KLEINFELDER 4.3.2 MONITORING SCHEDULE The pilot test system will be monitored hourly to track the performance of the technology. Monitoring protocol will serve the following objectives: • determine the volume of soil gas being removed • determine location/dynamics of system influence • evaluate radius of influence of the system • determined the flow/pressure potential of the vent and sparge well The following table summarizes the monitoring schedule for the pilot test system. TABLE 4-1 SVE/AS MONITORING SCHEDULE S' Com onent Pararneter`: Method Fre uenc Vent Well Flow Thermal Anemometer Hourly Vacuum Fixed Vacuum Gauge Hourly Monitoring Wells (MW-DIS-1,AS/SVE-1,AS/SVE-2,NP-1, Pressure Magnahelic Gauge Hourly NP-2,and MW-DIS-9) Flow Micro-rotometer Sparge Wells Flaw Anemometer Hourly Pressure Pressure Gauge Hourl The radius of influence of the sparge well will also be evaluated by performing a bubble flux test in MW-DIS-1. The test will involve lowering a specially designed conduit into the monitoring well while the air sparge well is operating. The conduit is equipped with a conical capture head to measure the depth of the initial intersection of airflow through the well screen from the sparge well. The conduit is connected to 1/4-inch tubing and a rotameter to monitor the flow passing through the capture head. The apparatus is lowered until the initial flux point is determined; the depth is then recorded. The interception depth is then compared to the lateral and vertical distance from the sparge well and a parabola is drawn through the points to approximate the air path of the sparge well. This method was developed based on our experience of other similar air I sparging projects, and has proven accurate and reliable. { 1228012002R476 Page 16 of 26 Copyright 2002 Kleinfelder,Inc. May 17,2002 I