Laserfiche WebLink
RULE 4 PERFORMANCE STANDARDS <br />4.05.8 Acid-forming and Toxic -Forming Spoil <br />Acid forming materials do not exist in significant quantities within the overburden to be removed by the <br />mining operations. A discussion on the overburden at the Colowyo operation has been conducted as set <br />forth in Section 2.04.6. A discussion of the overburden monitoring plan is set forth in Section 2.05. <br />Acid -Base Accounting shows that 19 feet out of 4,212 feet of analyzed over- and inter -burden has a net <br />acid -generating potential, and the average acid -neutralizing potential to acid -generating potential ratio is <br />strongly weighted toward acid -neutralizing in each borehole (Exhibit 6, Item 9). <br />4.05.9 Post -Mining Impoundments <br />Please see Section 4.05.9 in Volume 1. <br />4.05.10 Underground Mine Entry and Access Discharges <br />Colowyo currently conducts surface coal mining exclusively. <br />4.05.11 Groundwater Protection <br />Please see Section 4.05.11 in Volume 1. <br />4.05.12 Protection of Groundwater Recharge Capacity <br />Please see Section 4.05.11 in Volume 1. <br />Collom — Rule 4, Page 7 Revision Date: 3/3/16 <br />Revision No.: TR -108 <br />