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• -12- • 1 I\%. Geology}• - Rules 2.04.5 and 2.04.6(2] (con't) ~ The coal in the surge pile will be exposed to surface runoff for short periods of tine. ?fa terial in the pile will normally be cycled within one day. There is therefore little potential for e::cessive leaching of material in the pile. The area of the surge pile accounts for only 3.5 percent of the total disturbed area. This is approximately the ratio of contribution cf leachate from the surge pile to the runoff from the rest cf the disturbed area. The leachate e,•ouid be appreciabl~• diluted in this case. All runoff from the surge pile and the bench area is contained with a sediment control system as described in the €ollocain~ section (~'. H._•drologic Balance: Surface dater) of this document. The syste:.caill prevent the runoff from entering the natural drainage. Runoff from the area caill be released into the natural drainage onl~• after it meets all applicable effluent standards. ~'. Hvdrolocic Balance: Surface Water - Rules 2.04.5. 2.04.7, 2.05.3(4 The information provided dealing with surface water quality, surface water euantity and sedimentation control was reviewed b}- the Division. This information can be found in Sections 2.4, x.2.6, and 4. 2.i o: Volu-~e 1 and Appendix ?1 of Volume IV of the application. The following comments are based on review of these materials. T_he applicant has supplied surface water oualit} data which is specifically required bti• Rule 2.04.7(2)(b)(ii). The analyses provided (Tables 4.2-6 and 4.2-7 and Figures 4.2-8 and 4.2-9) include a number of parameters in addition to those required by the Rules and Regulations. Data provided by the applicant are sufficient to make the required findings of compliance for this section. These data indicate that the baseline water is substandard in quality (according to ?lined Land F,eclamation standards of August 26, 1981]. The operation will have little effect o^ the quality of this water. The Division requires that monitoring of surface water continue during miring to verify these conclusions. The fcllowing discussior. explains the monitoring program, Surface water ouar,tiry and qualito will be monitored upstream and do~.•nstrea:. of the disturbance in ?ScClane Canyon and on East Salt Creek upstream and dotzstream of the confluence of ?1cClane Cam on and East Salt Creek. Salt Creek ?fining Company has agreed to establish a new monitoring site on East Salt Creek directly below the mouth of ?fcClane Car._von. The Division requires that Salt Creek ?lining Company locate the monitoring site on a nap and provide an adequate designation for reference. The location is subject to approval b}• the Division. This monitoring network will he sufficient to identify an}• effects of the operation or. surface t:ater.