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M-93-080/Calhan Pit Jan 11, 1994 page 2 6. Exhibit D also mentions an underlying layer of shale. Not being an ideal medium for deep-rooted grasses, I am concerned about mining down to this layer and then backfilling it with an insufficient thickness of overburden, before topsoiling. What is the expected depth of replaced overburden, and/or any special steps taken to insure adequate revegetation at these areas? 7. Exhibit E states that this pit will be covered by the Brick Institute of America Group 8tormwater Discharge Permit #1024. Please provide evidence that this site is indeed covered under this group permit. 8. Given that the above-mentioned permit is acceptable, the Division will not require evidence of an individual pit stormwater permit from CDOH. Regardless, the Division must see the stormwater Management Plan. This is important inasmuch as Exhibit E says there will be no earth dams and the grading of the pit floor will facilitate positive drainage toward Bracket Creek. Attention should be given in such plan to situations involving heavy storm events, fuel or lubricant storage and spills, etc. Also, based on local well data, please state what the approximate depth to groundwater is. 9. Text in Exhibit E touches on Phases I, II and III. Please provide more specific information on Phases II and III, especially in regard to actual locations and timing of activities. As mentioned above, this information should be reflected on the mining map. 10. Exhibit F, the Reclamation Map, needs to show information on the applicant's best projection of the extent of necessary reclamation, final contours, site drainage, stockpile locations, etc., for Phase II and III. 11. Exhibit G states that the applicant has covered this operation's need for acquiring or applying for a NPDES permit through a Brick Institute of America Group stormwater Discharge Permit #1024. Does this mean that the pit would otherwise require a NPDES permit? 12. The reclamation costs in Exhibit L should reflect any mobilization/demobilization of equipment. The figures I calculate will include them, since the bond must cover outside contracting of reclamation. I recognize that the applicant can reclaim less expensively during mining, with on-site equipment, than can a contractor.