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10 September 2004 <br /> AGE-NC Project No 03-1100 <br /> Page 5 of 10 <br /> 3 1 2 Laboratory Analysis of Soil Samples <br /> Selected soil samples were transported under chain of custody procedures to Cal Tech <br /> Environmental Laboratories (CTEL), a California Department of Health Services (DHS)-certified <br /> laboratory and analyzed for <br /> • TPH-g in accordance with EPA Method 8015 Modified, <br /> • BTEX In accordance with EPA Method 8260B, and <br /> • The oxygenated fuel additives methyl tertiary butyl ether (MTBE), tertiary butyl alcohol <br /> (TBA), dl-Isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl <br /> ether (TAME), 1,2-dichloroethane (1,2-DCA) and 1,2-dlbromoethane (EDB) by EPA <br /> Method 8260 Modified <br /> 3 1 3 Drilling Equipment E ment Decontamination and Borehole Abandonment <br /> p <br /> All hollow stem augers were cleaned prior to advancement in each boring location The sampling <br /> equipment was washed In Alconox solution and rinsed with water prior to each sampling run to <br /> avoid cross-contamination At the conclusion of soil boring activities, borings were completed as <br /> wells and a sanitary seal was installed to prevent vertical migration of contaminants <br /> 3 14 Well Completions <br /> The SVE soil borings were completed using two-inch diameter PVC casing with 0 020-inch slotted <br /> screen materials and blank casing extended to the surface,with a filter pack (No 3 Lonestar sand) <br /> In the following configurations <br /> • SVE1 was completed as a soil vapor extraction well, with the screen interval installed from <br /> approximately 12 feet to 27 feet bsg A filter pack was Installed from 10 feet to 27 feet bsg <br /> and a two foot transition seal of bentonite chips was then installed above the filter pack and <br /> hydrated, <br /> • SVE2 was completed as a soil vapor extraction well, with the screen Interval Installed from <br /> 30 feet to 35 feet bsg A filter pack was Installed from 28 feet to 35 feet bsg and a transition <br /> seal of two feet of bentonite chips was then Installed above the filter pack and hydrated, <br /> • SVE3 was completed as a soil vapor extraction well, with the screen Interval Installed from <br /> 15 feet to 20 feet bsg A filter pack was Installed from 13 feet to 20 feet bsg and a transition <br /> seal of two feet of bentonite chips was then Installed above the filter pack and hydrated, <br /> Advanced GeoEnviron mental,Inc <br />