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The location of nine (9) monitoring wells designed to evaluate water quality, groundwater flow <br />conditions, and saturated thickness in the backfilled pit areas upgradient of the Trench Drain are <br />shown on Figure 2.05.6(3)-1. The wells will be constructed with 4 inch PVC extending from the <br />surface through the backfill and into the undisturbed pit floor. The wells are designed to be <br />screened above the contact between the backfill and the undisturbed pit floor. <br />All of the monitoring wells will be 4" in diameter with the total well depths as follows: <br />Well Name <br />Total Estimated Depth (ft) <br />MW BF -59 <br />31 <br />MW BF -60 <br />54 <br />MW BF -61 <br />85 <br />MW BF -62 <br />64 <br />MW BF -63 <br />99 <br />MW BF -64 <br />129 <br />MW BF -65 <br />127 <br />MW BF -66 <br />111 <br />MW BF -67 <br />107 <br />Attachment 2.05.6(3)-4 Revised: October 2016 (TR -74) <br />Page 2 <br />