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Request for Technical Revision — US 287 Geotechnical Investigation <br />Boring Completion and Anticipated Groundwater Conditions <br />Borings will be reclaimed as work progresses. After reaching final depth, the cored bedrock section (when <br />applicable) will be backfilled with bentonite chips; the remainder of the hole will be backfilled with drilling <br />cuttings. It is estimated that to advance the H03 coring system, up to 100 gallons of water could be used to <br />recover 10 feet of bedrock. Depending on the drilling method, the water may be recirculated in a mud pan <br />in an attempt to reduce loss or the water will remain on the surface where the boring is drilled. <br />At this time, Yeh does not plan or intend to monitor groundwater in the Quarry. Groundwater is not <br />anticipated to be encountered in any of the planned geotechnical borings due to the relatively shallow <br />nature of the borings and deep local drawdown within the adjacent strip pits. If drilling encounters <br />suspected contaminated subsurface conditions, drilling will be immediately halted, cuttings will be <br />contained on site for proper disposal, the boring will be backfilled with bentonite to full depth, and the <br />property owner will be notified. <br />Attachments <br />Boring Location Plans <br />