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�- 30 November 2000 ` AGE-NC Project No. 99-0657 Page 2 of 4 For each sample,both ends of the leading or other selected sleeve were covered with Teflon sheets, capped and sealed with tape.The samples were labeled,stored on ice and transported under chain-of- custody to McCampbelI Analytical laboratories, Inc. (MAL), a State of California Department of Health Services (DHS)-certified analytical laboratory. 2.2. LOGGING i6. Soil was extruded from a second brass sleeve or from the unpreserved portions of the soil in the core barrel samples and were screened for the presence of organic vapor using an organic vapor meter �. (OVM) equipped with a photo-ionization detector (PID: Thermo Environmental 580A, 10.0 eV, calibrated to isobutylene),and the OVM readings were recorded on the boring log.The soil was then visually described in accordance with the Unified Soil Classification System (see Appendix A). 2.3. WELL AND BORING COMPLETION Borings MW-5 through MW-8 were completed as ground water monitoring wells using two-inch .��-- diameter PVC casing with 0.020-inch slotted screen installed from approximately 30 feet to 10 feet bsg and with blank casing extended to the surface(boring MW-5 was backfilled from 35 to 30 feet with PEL-plug bentonite). The filter pack (No. 3112 Lonestar sand) was installed from 30 feet to +- approximately 8 feet bsg. A nominal 2-foot bentonite pellet plug was then installed above the filter pack and hydrated. The wells were then grouted from 6 feet to 0.5 feet bsg with portland cement. Water-tight, traffic-rated well boxes were then installed over the wells (a ground water monitoring 'r well design is shown in Figure 4). 2.4. LABORATORY ANALYSES OF SOIL SAMPLES Selected soil samples were analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA LN Method 8015 Modified; • Volatile aromatic hydrocarbons: benzene, toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA Method 8020; and • Oxygenated compounds:di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE),methyl tertiary-butyl ether(MTBE),tertiary-amyl methyl ether(TAME)and tertiary butanol(TBA) in accordance with 8260-Modified, respectively. r ar Advanced GeoEnviroamental,Inc.