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1 <br /> i i <br /> 08 Jude 1998 <br /> AGE-NC Project No 95-0173 <br /> Page 6 of 7 <br /> 10 Log borings in accordance with the Unified Soil Classification System (USCS, as per Visual <br /> Classification of Soils, 1986, Bureau of Reclamation Engineering and Research Center) <br /> 1 I Analyze selected soil samples for TPH-g, TPH-d, BTE&X, MTBE, DIPE, TBA, ETBE, <br /> TAME, ethanol and methanol in accordance with the appropriate EPA methods <br /> 4 2 INSTALLATION/DEVELOPMENT OF GROUND WATER MONITORING WELLS <br /> The following procedures will be toliowed for each boring completed as a ground water monitoring <br /> well <br /> I CVi7j�i��e single ails dual-completed wells utiiiziilg two-inch dia.victer PVC casing and <br /> 0 020-inch slotted screen A filter pack (43 Lonestar Sand) will be Installed in the annular <br /> space around the casing Surge the well to settle the filter pack An approximate three-foot <br /> bentonite plug will be installed over the filter pack and the remaining annular space will be <br /> grouted to the surface with portland cement A traffic rated well box will be installed over <br /> . each well Typical well design is illustrated on Figure 3 <br /> 2 Place cuttings generated during drilling activities on plastic sheeting on-site and cover <br /> Disposal alternatives will be evaluated pending laboratory analysis <br /> 3 Containerize rinseate generated during drilling activities in properly labeled D O T -approved <br /> 55-gallon drums, and stored on-site in an area lacking general public access <br /> 4 Develop new monitoring wells utilizing a submersible pump until water is essentially <br /> sediment free <br /> 5 Survey the top of each well casing to the nearest 1/100th of a foot to determine the elevation <br /> relative to a benchmark of known elevation <br /> 43 GROUND WATER SAMPLING <br /> Upon completion of installation procedures, ground water samples will be collected from each new <br /> well <br /> I No sooner than 48 hours after installation of ground water monitoring wells, measure to the <br /> nearest 0 01 foot, the static water level in all wells at the site <br /> i2 Purge each well using a dedicated bailer or submersible pump At least three well volumes <br /> Advanced Geoltnvtrotunentai,Inc <br />