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U eliminate the need for the Piceance Site evaporation pond and the Parachute Site MVR purge pond altogether and to minimize the size of the Parachute Site evaporation pond. Because American Soda's ability to completely eliminate the Piceance Site evaporation pond and the Parachute Site MVR purge pond is not certain, it is assumed that these ponds will be constructed and operated as proposed. American Soda will configure all process ponds to facilitate the installation of netting to exclude waterfowl and other birds. Pond configurations may include multiple cells to reduce span distances and to provide sufficient berm area for anchoring and support structures. At the time that a pond or individual cell is constructed, support structures for netting will be installed as part of the pond construction. Netting with a maximum mesh size of 2 inches will be installed over all active process ponds or cells. Netting installation on a pond or cell will be completed prior to the time that process fluids are stored in the pond or cell. American Soda will monitor process pond chemistries on a quarterly basis. At a minimum, TDS and sodium concentrations and pH will be monitored, and additional parameters could be added if it is determined that other constituents in :he pond inflow streams could represent a hazard to waterfowl. Monitoring results will be provided to the BLM, the CDOW, and the FWS on an annual basis or upon request. If monitoring results indicate that chemical conditions that are hazardous to birds do not develop in the ponds or pond cells, American Soda may request relief from the netting requirements. American Soda could remove existing netting and/or eliminate the installation of netting on subsequent ponds or cells upon approval from BLM and/or FWS, as appropriate. Other ponds, including raw water storage ponds and stormwater retention ponds, would also be constructed at the Piceance Site and the Parachute Site. These ponds would not constitute a threat to birds because they will not contain process water, and no mitigation is necessary for these ponds. There may be reasons to modify this Migratory Bird Mitigation Plan in the future based on the success of the activities implemented, changes in migratory bird resource management priorities and objectives, improved mitigation methods or technology, or other reasons. For example, if monitoring results indicate that anticipated hazardous conditions do not develop in the ponds, the netting requirement could conceivably be changed to a monitoring requirement, as appropriate. It should be understood that American Soda, the BLM, and the CDOW view wildlife mitigation as a dynamic process and assume that future modifications to the Migratory Bird Mitigation Plan are possible throughout the life of the project. Any such modifications would be developed through consultation among the parties. Wildlife M~tiRation Plan 3-2 Yankee Gulch Sodium Minerak Project American Soda, L.L.P.