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Mr. James Dillie Adequacy Letter, Apache Mine Permit No. M78-009 Page 4 suppression unless there is no available water on site; then RBC will purchase water from off site. RBC did not indicate where the water will be purchased This problem must be addressed becaase water rights issues may be involved Revise Frhibit G to reflect yoar response. A new Mining Plan (Exhibit D) has been provided to the Division, as part of the response to a Permit Disturbance Variance in July 1999. Exhibit D, unchanged from the draft version, has been incorporated into the attached replacement pages for the permit amendment. Exhibit G is not changed with regard to this issue. Specifically, Page 9 of Exhibit D was changed as follows in response to this comment. Dust generated during the stockpiling and hauling processes will be controlled effectively by water spraying. Disturbed area runoff water from the e~ pit or erosion control dams will be used for dust suppression . In the event that there is no on-site water then 1tBC will purchase water from a legal, local offsite source or municipality. Additionally, calcium lignosulfonate may be applied as a road binder and dust palliative, if appropriate. The lignosulfonate will be applied as a liquid additive during water spraying of the road. The lignosulfonate will be diluted with water and applied at the rate of 0.25 to 0.5 bulk gallons per square yard and worked into the upper 1 to 6 inches of the road base. Lignosulfouate regenerates with water spraying for approaimately 2 to 3 years. Item S As approved, the Mining Plan states that "in order to prevent water from collecting in the mining area, small diversion ditches will be created to carry the water around the working area and into the prinwry drainage course " and also states "if water does collect in the pits during periods of heavy precipitation, it will be pumped back into the normal drainage system. " Diversion ditches were not observed during the pre-operation inspection or when the site was re-inspected Do you stilt intend to construct diversion ditches? Is the water in the pits pumped back into the normal drainage system? A new Mining Plan (Exhibit D) has been provided to the Division, as part of the response to a Permit Disturbance Variance in July 1999. Exhibit D, unchanged from the draft version, has been incorporated into the attached replacement pages for the permit amendment. Specifically, Page 9 of Exhibit D was changed as follows in response to this comment. . In order to prevent undisturbed area runoff water