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E <br />SECTION 76 <br />SPECIAL <br />Page 5 of 12 <br />(02/17) <br />B. The Contractor shall protect any existing survey monuments, groundwater wells, <br />bollards and other monitoring wells in or near the work area. Any existing items <br />damaged by the Contractor shall be repaired or replaced by the Contractor to its <br />original or better condition. <br />3.03 DRILLING <br />A. Drilling does not require EHD inspection. <br />B. The Contractor shall drill at the location shown on the drawings. Contractor shall <br />verify drilling location with the Engineer before drilling. <br />C. The Contractor shall decontaminate the drilling rig and drilling equipment before <br />drilling. <br />1. Decontamination <br />a. Decontamination shall be in accordance with ASTM D 5088 and ASTM <br />D 5608. The drill rods, drill bits, augers, temporary casing, well developing <br />equipment, tremie pipes, grout pumping lines, and other associated <br />equipment shall be cleaned with high-pressure hot water/steam prior to <br />drilling. Weighted measuring tapes used in previous projects shall also be <br />decontaminated. <br />b. Decontamination shall be performed either at a central decontamination <br />station or an area that is remote from, and cross- or down -gradient from, the <br />well being drilled. <br />2. If drilling equipment is found unclean by the Engineer, then the Contractor <br />shall clean the equipment at the site without charging drill rig down time. <br />D. Contractor shall clear the boring location of all brush and minor obstructions. <br />E. The Contractor's Geologist shall log the drilling at every 5 -foot intervals based on <br />the characterization of the samples. <br />F. If the borehole was over-drilled, the bottom of the hole shall be filled with sand to <br />raise the bottom of the hole. <br />LANDFILL AREA 5B -SEC 76 -GW Well Specs <br />