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REQUIRED PARAMETERS (ALL WELLS EXCEPT W-15) pH (FIELD) CALCIUM SULFATE MANGANESE COtJDUCTIVITY AT 25°C (FIELD) MAGNESIUM ALUMINUM ZINC TEMPERATURE (FIELD) AMMONIA NITRATE SODIUM TOTAL DISSOLVED SOLIDS IRON BICARBONATE REQUIRED PARAMETERS (WELL W-16) IN ADDITION TO THE ADOVE LISTED PARAMETERS, WELL W-16 (SPOIL AQUIFER WELL) AiIALYSES WILL INCLUDE ARSENIC, CADMIUM, LEAD, MERCURY AND SELENIUM. THE PERMITTEE MUST SUBMIT THE RESULTS OF THE ABOVE MONITORING PROGRAM TO THE DIVISION SEMI-ANNUALLY. The present mining operation is currently causing a negligible impact on the quantity and quality of ground water in Stollsteimer Creek (Exhibit 38 of Federal Lease permit revision application). The operation may have some impact on the quality of both ground and surface water in the future. To assist in the assessment of these impacts, the operator has installed a monitoring well in the southwestern portion of the backfilled cast Pit. The well has been installed in the lowest portion of the pit in order to monitor the spoil aquifer. Monitoring requirements for this well are included in the above stipulation. A discussion of possible ground water hydrologic impacts can be found in the Cumulative Hydrologic Impact Assessment within this document. With the acceptance of the above stipulation, the existing and proposed operations are in compliance with the requirements of this section. VI. Surface Water Hydrology - Rules 2.04.5, 2.04.7, 2.05.3(4), an Information pertaining to surface water quality and quantity can be found in Section 2.04.7, Volume I of the approved permit application and the Federal Lease permit revision application. Additional surface water hydrology information is provided in the approved permit application by Exhibits 29 and 34 and Maps 5, 7, 8, SA, 9, and 16. Surface hydrology information in the Federal Lease application is also provided by Exhibit 38 and Maps 6R1, 7R1, 8R1, and 8BR1. Information pertaining to sediment control structures can be found in Section 2.05, Volume I and Exhibit 22, Volume IV of the approved permit application, and in Volume, Section 2.05-19 through 22 of the Federal Lease permit revision document. The approved and proposed permit areas are drained by one perennial drainage, Stollsteimer Creek. Flows in Stollsteimer Creek vary seasonally. Highest flows occur during periods of snowmelt and intense thunderstorms. Stollsteimer Creek receives flow from numerous ephemeral drainages. This creek is dammed in numerous locations above the proposed permit area, the closest dam being located at Capote Lake, approximately 5 miles upstream. -15-