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r d M �`- s to - Y.�. ✓ }. 'rT' & -f!, �.. �r '.3�5' -r.r -�. <br /> • The filter pack consisted of clean #2-16 sand. This sand is <br /> compatible with a 0.010-inch slot size in accordance with the <br /> proposed ASTM monitoring well standards; <br /> • The well seal was made with 1!4-ii _h bentonite pellets; <br /> • The grout mix used to complete the wells consisted of cement <br /> sand, bentonite powder and clean water; <br /> • The well covers (traffic box) were set directly into the wet grout. <br /> The well casing was permanently marked with an identification <br /> • number and measuring point; and <br /> • Following completion of the wells, the top of each well was <br /> surveyed to determine elevation. <br /> Ptu%e Water Containment and Disposal <br /> Groundwater samples were collected with a HydroPunch. As a <br /> result, MVV-5 has not yet been developed or sampled. Although MW-6 <br /> has yet to be sampled, 55 gallons of water were purged immediately <br /> after drilling. Along with rinsate from equipment steam cleaning, <br /> the purge water was collected in drums for eventual disposal. A <br /> composite water sample was recently taken from these drums, and <br /> laboratory analysis showed non-detected TPH. <br /> Abmdoia ment of Bore Moles <br /> Three boreholes (B-17, B-18, and B-19) were backfilled with a grout <br /> mix consisting of sand, cement, bentonite powder, and clean water in <br /> the following ratios: <br /> • One 94-1b. sack of Portland cement; <br /> a Two sacks of Lonestar 120 sand; <br /> • 5 lbs. of bentonite powder; and <br /> • 4.5 to 6.5 gallons of clean water. <br /> Two soil borings, B-20 and B-21, were converted into monitoring <br /> wells. <br /> 2-5 <br />