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Manganese -dissolved Molybdenum -dissolved Sodium -dissolved Selenium -dissolved Lead -dissolved Hazdness (as CaCO,) Alkalinity, total (as CaCO, to pH 4.5) Carbonate (as C0,) Bicazbonate (as HCO,) pH (pH units) Specific conductance (mmhos/cm) Chloride Hydroxide (as OH-) Sulfate (S0,) Total dissolved solids (at 180 degrees C) SAR (sodium absorption ratio) 2. There is no surface water monitoring described in the Application at the Keenesburg Mine Site (Sec 2.04.7). On December 18, 1989 Technical Revision #23 approved the deactivation of the CDPS permit with the Depaztment of Health concurring. Permit COG-850038 was later instated (re-instated), with an expiration date of 6/30/97. CEC has again proposed, and CDPHE approved, the expiration of the CDPS permit without renewal (see CDPHE letter, undated, Re: Request for Inactivation, Coors Energy Company -Keenesburg Mine, Colorado Dischazge Permit System (CDPS) No. COG-850038, Weld County, Division files). 3. The Division will require the sealing of drilled holes. Each hole, well or other underground opening is to be capped, sealed, backfilled, or otherwise properly managed. (Rule 4.07.3)(PAP, page 114c) 4. The Division proposes to continue with the approved exemption of certain small disturbed aeeas (topsand storage and reference azea sites) from the requirement for sediment ponds. This is because of the limited size of the aeeas, and that ponds and treatment facilities aze not necessary for drainage to meet the effluent limitations of Rule 4.05.2 and applicable State and Federal water quality standazds for receiving streams. No mixing of the surface drainage from these areas with a discharge from underground workings will occur. The small areas to be exempted are described in the Index Maps and Legal Description sections of the Permit and Application. [Rule 4.05.2(3)(b)(1)] Permit Renewa104 Findings 30 August 2001 Page 19 of 25 Pages