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• This plan remains essentially unchanged except for the following changes: 6900 North Well -Streeter Fill -During the summer of 1984, the shallow 6900 north well collapsed. It was later determined that since this. well monitored only a small perched zone within the fill, reestablishment of the well would not be necessary. Refer to the 1984 Annual Report for additional details. 6900 South Well -Streeter Fill -_It was noted on March 21, 1986 that this piezometer well had also collapsed. This well was reestablished in the fall of 1986. For further details concerning this well, refer to the 1986 Annual Report. New Unner Good Sprine Creek Surface Water Monitoring Site This site replaced the Upper Good Spring Site to allow for mine expansion. Monitoring shall utilize any equipment, structures, devices or methods necessary to measure and sample accurately the quality and quantity of surface water. Refer to Map 37 for site location. These commitments have satisfied the requirements of Stipulation 1 in the Findings document. The proposed surface water monitoring plan includes monitoring required under the Colorado Wastewater Discharge Permit Number CO-0045161 issued by the Colorado Department of Public Health and Environment. Colowyo will measure the quantity and . quality of any discharges from the permit area in compliance with the NPDES Permit. The current permit is provided in Exhibit 7, Section 2. Colowyo will report the discharge in accordance with the Clean Water Act of 1977 under the NPDES Permit on a quarterly basis; therefore, Colowyo will plan to use the NPDES report for filing with the Division. All monitoring data is submitted in an annual report. Annual Hydrologic Reports for the period of January ls` through December 31s` will be submitted by April ls` of the following year. • 4.05-15 Revision Date: 11/17/05 Revision No.: MR-75