Laserfiche WebLink
t. e . <br /> ATTACHMENT B <br /> I <br /> BOREHOLE DRILLING <br /> Boreholes are drilled by a licensed drilling subcontractor, using a truck-mounted drilling rig <br /> equipped with nominal 8-inch-diameter hollow-stem augers Boreholes are drilled by continuous <br /> coring to a predetermined depth below the -round surface Borehole depths are based on site <br /> conditions, including but not limited to conditions such as depth to water, topography, and depth <br /> to bedrock <br /> To prevent cross contamination during drilling, all equipment is steam cleaned prior to and <br /> between use at each borehole <br />