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E <br /> i <br /> Mr. Michael Infurna <br /> October 24, 2005 <br /> Page 3 <br /> 1.� <br /> Table 1. Well Construction Details <br /> li #: Borehole Total <br /> Depth Well Total Depth Screen Interval Casing Diameter <br /> Well ID ft b s ft b s 0.020 slotted;(ft b s) (Sch 40 PVC <br /> i� VEW-1 and VEW-2 60 60 20-60 3-inch <br /> The location of VEW-1 is in the center of the hydrocarbon impacts, at the <br /> y <br /> southern end of the former 4,000 gallon gasoline underground storage tank (UST) <br /> i <br /> as shown on Figure 2. <br /> The location of VEW-2 is located to be on the edge of the hydrocarbon impacts in <br /> soil amin <br /> s detered by the location of soil boring B7,which contained elevated <br /> j concentrations of hydrocarbons. <br /> 1 � <br /> i PHASE II —SVE AND AS PILOT TESTING <br /> I' An SVE pilot test will be conducted on VEW-1. The vacuum pressure in VEW-2, <br /> which will be located approximately 20 ft southeast of VEW-1,will be used to <br /> determine the radius of influence of VEW-1. The vacuum in the well,recorded in <br /> inches of mercury (in Hg),will be recorded throughout the pilot test. <br /> i <br /> An AS pilot test will be conducted on MW-1. A pipe with 2 ft of well screen will <br />} be placed in the monitoring well approximately 10 ft below the water level. The <br /> pipe will be attached to an air compressor and air will be injected into the water. <br /> During the AS pilot test the pressure in well VEW-1 will be recorded along with <br /> dissolved oxygen. <br /> f <br /> The results of these tests will be used to estimate the effectiveness of these <br /> technologies as well as model a capture zone. The pilot test will consist of <br /> �+ operating the SVE system independently for an eight-hour period, operating the <br /> AS system for an eight-hour period, and operating the combined system for <br /> 11 10 days followed by shut down of the system to determine rebound effects. <br /> Groundwater samples will be collected prior to starting the test and following <br /> l <br /> shutdown of the system from wells VEW-1 and MW-1. <br /> SCOPE OF WORK <br /> rj The scope of work for this site will be completed in accordance with Industry <br /> accepted standards and protocols and BC Standard Operating Procedures,which <br /> were previously provided in Appendix A (compact disk) of Brown and Caldwell's <br /> July 14, 2005 Workplan. <br /> P:\28000\128253-T&T Trucking SVF.,\Work Plan sve 2.doc <br /> l <br />