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06 August 2004 <br /> i AGE-NC Project No 95-0128 <br /> Page 9 of 11 <br />' TPH was not detected in soil samples collected from the borings Toluene, ethylbenzene and total <br /> xylenes were detected at maximum concentrations of 0 006 milligrams per kilogram(mg/kg),0 011 <br /> mg/kg and 0 04 mg/kg, respectively MTBE was detected at a maximum concentration of <br />' 0 028 mg/kg <br /> No additional analytes were detected at or above laboratory detection limits in the samples analyzed <br />' Analytical results of soil samples are summarized on Table 5 The laboratory reports(CTEL Project <br /> No CT214-0403141), QA/QC report and chain of custody forms are included in Appendix H <br /> GeoTracker confirmation pages of the submitted laboratory electronic deliverable format(EDF)files <br />' are Included in Appendix I <br />' 3 7 INSTALLATION OF UNDERGROUND SOIL VAPOR EXTRACTION AND <br /> GROUND WATER EXTRACTION LINES <br />' Betweenl9 and 20 May 2004, an approximately 18-Inch wide,8-inch thick and 150 foot long trench <br /> was cut out of the asphalt surface, the asphalt waste was transported to West Coast <br /> 10 ConcretelMatenals Inc , a concrete recycling facility located in Stockton, California Afterwards, a <br /> mini-trencher equipped with an 6-inch bucket trenching well was utilized to excavate soil in the <br />' above referenced trench-line to approximately 18-inches deep,excavation cuttings were temporarily <br /> stockpiled adjacent to the trenches on site A map depicting the on-site trench system is depicted on <br /> Figure 2a <br /> tA 1-Inch diameter,schedule 40 PVC piping(process piping)and 3/4-inch diameter,schedule 80 PVC <br /> electrical piping(electrical conduit)were installed in the on-site trench at approximately 18-inches <br />' bsg The PVC piping was utilized in the trench to connect the process piping system from each <br /> extraction well head to the ground water treatment system From the ground water extraction pump, <br /> electrical wiring was routed through Individual 3/4-inch diameter PVC conduit through the trench to <br />' the electrical control panel of the treatment system Following placement of all PVC piping, the <br /> trench was backfilled with the excavated soil to 4-inches bsg The remaining space was resurfaced <br /> with asphalt The piping was completed within the fenced enclosure at the site <br /> The SVE system network utilized two-inch diameter,schedule 40 PVC piping installed underground <br /> from each well-head A piping valve was installed at each well head to independently regulate the <br /> flow from any individual well The piping was completed within the fenced enclosure at the site <br /> AGE anticipates the completion of the SVE treatment system in the next sixty days The vapor <br /> extraction wells will be connected to the inlet of the vacuum blower through a moisture removal <br /> vessel or drum, the outlet from the vacuum blower will be routed through 1,000 pound carbon <br /> • vessels, for adsorption and treatment The low concentrations of exposed hydrocarbon vapors In the <br /> vapor well network will allow for the immediate use of carbon adsorption A Magnehelic vacuum <br /> Advanced GeoEnvirpnmental Inc <br /> 1 <br />