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1. y _ ly , t F 21 December 1999 F `i AGE-NC Project No 98-0426 , Page 2 of 6 _ F McCampbell Analytical, Inc (MAI), a State of Califorriia Department of Health Services (DHS)- certified analytical laboratory t 22 LOGGING 11 J 1 i Soil was extruded from a second brass sleeve and screened for the presence of organic vapor using ' an organic vapor meter,equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene), and the readings were recorded on the boring log The soil ' was then visually described in accordance with the Unified Soil Classification System(see Appendix A -Boring Logs) 2 3 WELL AND BORING COMPLETION IBorings MW 1, MW2, and MW3 were completed as ground water monitoring wells using two-inch diameter PVC casing with 0 020-inch slotted screen installed from 35 feet to 15 feet bsg with blank casing extended to the surface The filter pack(No 3 Lonestar sand) was installed from 35 feet to • approximately 13 feef big The wells were then developed'uging a surge block to settle the sand pack A 2-foot bentonite pellet plug was then installed above the filter pack and hydrated The wells were then grouted to near the surface with portland cement Water-tight, traffic-rated well boxes were then installed over the wells 1 I j 1 , 2 4' "LABORATORY ANALYSES OF SOIL SAMPLES Selected soil samples were analyzed for 1 , � 1 , 4 Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA'S ' ' Methods 5030/8015m, and • Volatile aromatic hydrocarbons (benzene, toluene, ethylbenzene and total xylenes, BTEX) in accordance with EPA Method 8020 ' I r 1 25 MONITORING WELL PURGE PROCEDURES , On 26 October 1999, a Sohnst water level meter was used to measure the l depth to ground water in the three wells relative to the tops of the well casings The ground water elevations and gradient were • determined from these data(Table 1) ' r ' Advanced GeoEnviron mental,Inc 1 MI 1 � la ` r