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ZO <br /> Sampling Protocols <br /> Jt711i.ng <br /> Permits will be obtained as necessary for all wells(including borings)before <br /> drilling begins. The sail boring will be accomplished using a mobile mounted <br /> drilling rig employing the use of a hollow stem flight auger no icss than? 114-inch <br /> wy i.d. and 8 718-inch o.d. <br /> All drilling equipment will be thoroughly steam-cleaned before drilling begins to <br /> prevent the introduction of contamination from off site and between borings to <br /> prevent cross contamination. _. <br /> ` The borings will be logged under the direct supervision of a registered engineering <br /> geologist using the Unified Soil Classification System. The color, texture; <br /> moisture, plasticity (if applicable), coasistency� of the each materials, blow count, <br /> characteristics, and any evidence of contamination will be <br /> pertinent soil or bedrock <br /> Herein. x`.11 water-bearing zones and the depths at which they were encountered will <br /> be noted on these logs. <br /> All bonng�.will be drilled in such a manner as to prevent cross contamination <br /> between strata. Exploratory soil borings within the unsaturated zone will be <br /> backfilled with a concrete slurry mixture. <br /> Borings into the saturated zone will be drilled to a maximum of 20 feet beneath the <br /> top of the aquifer being explored. A.rj p:.rching layers encountered will be <br /> investigated to a maximum thicluness of five feet and will be backfilled with <br /> concrete slurry, after a bentonite sal has been placed. 'if a deeper aquifer is to be <br /> st be grouted into place to seal off the upper <br /> investigated, conductor casing will fir <br /> aquifer(s), in series if necessary and drilling will proceed through the conductor <br /> casing after the grout has been allowed to set properly. If evidence of <br /> contamination is noted during the drilling, the drilling will be halted until.the <br /> responsible professional determines the advisability of deeper drilling. <br /> Upon termination, the boring into the saturated zone will be completed as moll- <br /> toring wells and backfilled with concrete grout, after a bentonite seat has been <br /> placed. The boring for the monitoring well will be of a diameter at least four <br /> - <br /> casing to be used. <br /> inches greater than the two inch diameter of the well <br />