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i27 August 2004 <br /> AGE-NC Project No. 98-0440 . <br />' .'. Page./2 of b <br /> a 1407p6und hammer to advance the sampler. The number of blows,required to advance the'sampler <br /> over each 6-inch increment of the 18-inch sampling interval was recorded on.the boring logs. <br /> Sampling equipment-was washed in an Alconox solution and rinsed 'with water prior to.each . <br /> isampling ran to avoid cross-contamination. <br /> For each sample;both ends-of the leading or other selected sleeve were covered with Teflon sheets, <br />' capped and sealed with tape.-The samples were'labeled, stored on ice and:transported;under chain <br /> of,custody;to McCampbell Analytical, Inc. (MAI), a State of California'Department'of Health <br /> Services (DHS)-certified analyticai''laboratory.: <br /> F2.2. . LOGGING <br /> Soil was extruded from a sec6nd1brass sleeve or from the unpreservedportions of the soil in the core <br /> 'barrel samples and'were screened for the presence of organic vapor using,an organic vapor meter <br /> (OVM):equipped with a photo-ionization detector (PID: Thermo Environmental 580B, 10.0 eV, <br /> calibrated to isobutylene),and the OVM readings were recorded on the boring'log.-The soil was'then <br /> visually described in accordance.with the Unified Soil'Classification System (see Appendix C)'.". <br /> 2.3. WELL COMPLETIONS <br /> Borings MVLW1.1 and MW 12 were completed asground water monitoring welIs using two-inch <br /> diameter PVC casing with,0.020-inch slotted screen installed from approximately 5 feet to 25 feet <br />' bsg and' with blank eosin extended to the`surface. The filter pack o. '3 Lo' n­ ar son <br /> p (N d} was <br /> installed from 4 feet to approximately 25 feet bsg.A nomirial 2-foot bentonite chip"'wasthen installed , <br /> above the filter pack and'hydrated. Concr'etawas used to.'fi11 the annulus from 1 to.2 feet bsg. Water- - <br /> tight,traffic=rated'well bokes were then installed over.the wells.As-built well dia •ams are depicted <br /> on the,boring logs iri'Appendix C. ; <br /> 2.4._' -LABORATORY ANALYSES OF•SOIL,SAMPLES. <br /> Selected sowsamples.were analyzed for: <br /> • Total petroleum hydrocarbons quantified"as gasoline `and 'diesel (TPH-g and TPH-d,' ' <br /> e <br /> r <br /> ectivel <br /> p y).b s EPA Method 8015M; and <br /> y <br /> • i Benzene, toluene, ethylbenzene and total xylenes (BTEX) by EPA Method'8021.- , <br /> Advanced Geo Environment9l,,Inc- <br />