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' 30 April 2005 <br /> AGE-NC Project No 95-0141 <br /> Page 2 of 10 <br /> I Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler <br /> loaded with two pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected from the <br /> pilot borings at 5-foot intervals, beginning at 5 feet bsg,using a 140-pound hammer to advance the <br />' sampler The number of blows required to advance the sampler over each 6-inch increment of the <br /> 18-inch sampling interval was recorded on the boring logs After sample recovery,both ends of the <br /> second sleeve were covered with Teflon sheets, capped, and sealed with tape The sample sleeves <br />' were labeled, stored on ice, and transported under chain-of-custody to Cal Tech Environmental <br /> Laboratories(CTEL),a State of California Department of Health Services(DHS)-certified analytical <br /> laboratory Selected soil samples were analyzed for <br />' a Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br />' a Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tertiary-butyl ether <br /> (MTBE) in accordance with EPA Method 8260B, <br />' a The fuel additives di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE), tertiary-amyl <br /> methyl ether (TAME), tertiary butanol (TBA), 1,2-dichloroethane (1,2-DCA), and <br /> 1,2-dibromoethane (EDB) by EPA Method 8260B <br /> The sampling equipment was washed in an Alconox solution and rinsed with water prior to each <br />' sampling run to minimize cross-contamination <br />' 212 Logging <br /> Soil was extruded from a second brass sleeve The soil was then visually described in accordance <br />' with the Unified Soil Classification System (see Appendix B for boring log) <br />' 2 1 3 Well Completions <br />' Pilot boring MW-13 was completed as a ground water monitoring well using 2-inch diameter PVC <br /> casing with a 0 020-inch slotted screen installed from approximately 112 to 117 feet bsg The filter <br /> pack (No 3 Lonestar sand) was installed from 110 to 117 feet bsg, and a nominal 3-foot bentonite <br />' pellet plug was then installed above the filter pack and hydrated The well was then grouted to near <br /> the surface with portland cement,and a water-tight,traffic-rated well box was installed over the well <br /> An as-built well diagram is depicted on the boring log in Appendix B <br /> I <br />■ Advanced GeoEnvironmental,Inc <br />