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i . <br />�.r <br /> Sampling Protocols <br /> Drilling <br /> permits will be obtained as necessary for all wells(including borings) before <br /> drilling begins. The soil boring will be accomplished using a mobile mounted <br /> drilling rig employing the use of a hollow stem flight auger no less than 3 114-inch <br /> 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 bctwccn borings to <br /> prevent cross contamination. <br /> The borings will be logged (figure 5) under the direct snpe:rvisii�n t)(,, registered <br /> engineering geologist using the Unified Soil (A:,ssificalion System. The color, <br /> texture, moisture, plasticity (if applicable), consistency of the earth materials, blow <br /> counts, pertinent soil or bedrock characteristics, and any evidence of contamination <br /> will be noted. All water-bearing zones and the depths at which they were <br /> encountered will be noted on these logs. <br /> All borings will be drilled in such a manner as to prevent cross contamination <br /> rings within the unsaturated zone will be <br /> between strata. Exploratory soil bo <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. Any perching layers encountered will be <br /> investigated to a maximum thickness of 5 feet and will be backfilled with concrete <br /> slurry, after a bentonite seal has been placed. if a deeper aquifer is to be <br /> investigated, conductor casing will first be grouted into place to seal off the upper <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 i <br /> -- responsible professional determines the advisability of deeper drilling. <br /> Upon termination, the boring into the saturated zone will be completed as <br /> monitoring wells and backfilled with concrete grout, after a bentonite seal has been <br /> placed. The boring for the monitoring well will be of a diameter at least 4 inches <br /> greater than the 2 inch diameter of the well casing to be used. <br /> The cuttings from the drilling operation will be containerized on-site during drilling <br /> ._... for proper disposition...The proper.method of disposal will be dependent upon <br />