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<br />' 4.0 Evaluation of Salt Management Alternatives <br />Various management alternatives were developed to address the salt in the mine water <br />' discharges (Outfalla 001, 002, and 004) at PCC'e Palisade, Colorado facility. The various salt <br />management alternatives are summarized in Section 4.1. These alternatives were subsequently <br />' evaluated based on three screening criteria which included effectiveness, implementability, and <br />coat. <br />' 4.1 Identification of Alternatives <br />A variety of management alternatives were developed to address the mine water discharges. <br />' These alternatives were developed based on information provided by PCC, relevant technical <br />literature, end Earth Sciences' experience azth managing similar types oC waters. Salt manage- <br />' went alternatives for the mine waters are summarized below: <br />' MAl - OffSite Management at an Approved Treatment! <br />Disposal Facility. <br />' MA2 - On-Site Treatment Utilizing Reverse Osmosis (RO) and <br />Direct Discharge. <br />' MA3 - On-Site Treatment Utilizing Demineralization Ion <br />Exchange and Direct Discharge. <br />' MA4 - On-Site Management Utilizing Natural Evaporation <br />With no Discharge. <br />' MA5 - On-Site Management Utilizing Assisted Evaporation <br />With no Discharge. <br />' MA6 - On-Site Management Utilizing UI. <br />' 4.2 Alternative Screening Criteria <br />The management alternatives were screened using effectiveness, implementability, and coat es <br />t the evaluation criteria. This screening process wea utilized to provide a rational nonbiased <br />basis for selection of a technically feasible and cost-effective management alternative for <br />' management of salt in the mine water discharges. Applicable state and Cederal regulations <br />were also considered in the selection process where appropriate. Evaluation of an alternative's <br />effectiveneae included an assessment of the approximate time required for implementation, an <br />1 <br />