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EF C 0 1R 20 FIELD ACTIVITIES 2 1 ASISVETS System Installation and Operation The ASISVETS was Installed by SECOR in June — October 2005 based on plans prepared by Brown and Caldwell consultants and approved by Caltrans In June 2003 An as-built site plan of installed piping, AS/SVE system wells, and treatment area location is Included as Figure 3 Four AS wells constructed of 1-inch casing and two SVE wells with 6-Inch casing were installed between June 1 and 8, 2005, (Tables 1 and 2, and Figure 3) One sparge well (ASW-4) was installed to a depth of 96 feet below ground surface (bgs) with screen placed from 91 to 96 feet bgs Based on field conditions and soil contamination encountered during drilling above 60 feet, three remaining sparge wells (ASW-1, ASW-2, and ASW-3) were installed at a depth of 72 feet and screened from 67 to 72 feet bgs Similarly, based on field data, SVE well VEW-1 was installed to a depth of 40 feet bgs and screened from 20 to 40 feet bgs, and SVE well VEW-2 was installed to a depth of 40 feet bgs and screened from 30 to 40 feet bgs Two soil samples were collected for laboratory analysis at 15 and 40 feet in boring VEW-1 and at 35 and 42 feet in boring VEW-2 prior to constructing the wells Soil sample results are summarized in Table 2 One-inch acrylonitrile butadiene styrene {ABS, Duraplus} air sparge piping and 4-inch Schedule 80 polyvinyl chloride (PVC) SVE piping was attached at the wellheads and routed underground to an aboveground control box attached to the permit building wall where sample and flow ports, and flow, pressure and vacuum gauges are housed System piping was then routed aboveground from the control box along the building to a fenced and locked treatment compound in an adjacent parking lot IThe treatment compound is supplied with three-phase power from an adjacent pole- transformer and consists of the following 1) a King, Buck Technology (KBT) Model MMC- 5A, trailer-mounted 100-SCFM, 2) 5 hp SVE blower and catalytic oxidizer with 12 kw electric heater, 3) 7 5 hp Ingersoll-Rand rotary screw (RS) 28 SCFM compressor, 4) 385- gallon condensate-water tank, 5) 200 amp distribution panel, and 6) miscellaneous valves, piping, and gauges A Permit-to-Construct (PTC) was issued by the SJVAPCD in July 2005 System operation Is planned for November 2005 and the system will be serviced and monitored monthly Reports of operation data and treatment progress will be Included In quarterly OM&M reports , 11CALTRANS1Stockton-Shop 101GW Monitoringl3rd Qtr 2005103'05 OMBM_Final doc November 29,2005 Project No 940T 43148 00 3 SECOR International Incorporated