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11 SECTION 76 SPECIAL Page 9 of 12 (02/17) 17. Contractor shall try not to disturb the bentonite seal. 18. Contractor shall place neat cement in a single pour for wells up to 100 feet deep. For wells deeper than 100 feet, the Contractor shall pour neat cement in two pours, the second pour being at least 24 hours after the first pour. 19. Contractor shall place neat cement in the boring up to the existing grade. Contractor shall allow neat cement to settle overnight. After neat cement settlement, Contractor shall place additional neat cement to a level as indicated in the construction figures. 20. Contractor shall install the well enclosure and do the surface completion only after the neat cement has hardened. D. Contractor shall record the following information on the well completion log: 1. Depth to water -bearing zones 2. Total depth of bore hole 3. Depth from ground surface to top and bottom of the well screen interval 4. Depth from ground surface to top of the sand pack interval 5. Depth from ground surface to top of the bentonite plug 6. Height above the ground surface of the top of the well casing 7. Height above the ground surface of the top of the steel protective casing. 3.08 SURFACE COMPLETION A. Contractor shall clean well enclosure housing with high-pressure hot water/steam prior to installation to ensure that it is free of contamination. B. Contractor shall install well enclosure plumb. C. Contractor shall cut the well casing pipe to minimum required height. The well enclosure lid shall open and close smoothly providing space for pump discharge tubing and pump lead wires. D. Contractor shall remove the PVC end caps from the top of the casing and then install well plugs. E. Contractor shall place coarse sand in the annular space between the enclosure and the well casings. The sand shall be placed six inches below the top of the well casings. SP -22 LANDFILL AREA 5B -SEC 76 -GW Well Specs