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rs <br /> Sampling- Protocols <br /> Drilling <br /> Permits were obtained for the borings and monitoring wells before the drilling beLatl, <br /> The soil borings wer, accomplished using a mobile mounted drilling rig emrtloyinc the- <br /> use <br /> heuse cf a hollow Mr., flight auger no less than 3-314 inch i.d. and 8-718 inch o.d. <br /> All drilling equipment was thoroughly steam cleaned before drilling began to prevent <br /> the introduction of contamination from off site, and between borings to prevent cross <br /> contamination. <br /> The borings were logged (Appendix A) under the direct supervision of a registered <br /> 64 engineering geologist using the Unified Soil Classification System. Tile color, texture, <br /> consistency of the earth materials, blow counts, per- <br /> moisture, plasticity (if applicable), <br /> tinent soil or bedrock characteristics, and any evidence of contamination were noted. <br /> All water-bearing zones and the depths at which they were encountered were noted on <br /> those logs. <br /> All borings were drilled in such a manner as to prevent cross contamination between <br /> strata. Exploratory soil borings within the unsaturated zone were backfilled with a f:vc <br /> percent(5%) Bentonite and cement grout with a Bentonite plug at the base. <br /> `t=, <br /> The cuttings from the drilling operation were containerized on site &—ing drilling for <br /> proper disposition. The proper method of disposal is dependent upon results of labo-a- <br /> tory analysis; this disposal is the responsibility of the client-unless other arrangements <br /> have been made. <br /> Well (,"onslructiolt <br /> l All materials used in well construction were thoroughly cleaned prior to introduction <br /> into the boring. A Bentonite grout was placed at the bottom of the boring as necessary. <br /> After the seal had been allowed to set long enough to support the weight of the casing, <br /> a two inch 12") diameter well casing (PVC) with end cap and factory perforations for <br /> placement in the saturated zone (taking into account seasonal variation) was placed in <br /> the boring. The screen and filter pack sizes are as noted in the well construction draw- <br /> ing. The easing and end caps were threaded; no PVC cement was used. The :filter pack <br /> ick <br /> extends 4-112' above the perforated eche filter e�rack followed by a cement groritonite seal two to six fect ut tothe <br /> was placed in the annular space above P <br /> -- - ---. --- -----surfsre._Seal_and filter pack elevations may vary based oil the underlying geology. <br /> 1'5 <br />