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Enuirmimental Consultant ~ 7hu Jun 1992 <br />waterisediment quality in the proposed tailings impoundment: <br />assumptions about environmental quality of Gastineau Channel <br />resulting from proposed disposal methods: and discussion of <br />alternative and more preventive treatment, disposal and <br />processing options not considered. <br />Job: Review of Phelps Dodge's Aquifer Protection Permit <br />Application for tl~e Copper Queen Concentrator failings Storage <br />Area, Bisbee, Rrizona <br />Client: Arizona Toxics Information and She Border Ecology Project <br />Contacts: Michael Gregory, Arizona Toxics Information and Dick <br />Kamp, Border Ecology Project <br />Summary: The Copper Queen is a large open pit, dump leach <br />copper operation in southern Arizona that no longer is in the <br />active extraction stage but has a number of on-going dump leach <br />operations. Phelps Dodge's application, requested by the Arizona <br />Department of Environmental Quality, addressed the closing of <br />this facility in anticipation of opening another open pit <br />operation nearby. A groundwater plume with elevated <br />concentrations of sulfate and total dissolved solids extends <br />southwestward from the concentrator tailings storage area over a <br />7-square-mine area, is moving toward the Bisbee and Naco well <br />fields and the Mexican border at a rate of B.5 to 0.B feet per <br />day, and has adversely affected private drinking water wells. My <br />comments addressed all technical aspects of the application, <br />including evaluation of the hydrogeologic model used to predict <br />extent of the discharge impact area, characterization of <br />discharge, migration of contaminants to underlying groundwater, <br />unit design, alternative discharge control measures, <br />identification of constituents of concern, interpretation of <br />leach test results, points of compliance for groundwater <br />mmiitoring, interpretation of soil and water quality data, <br />monitoring plan considerations, Snd concerns Doer radioactivity <br />and hazardous constituents at the site. <br />Job: Technical evaluation of geochemical aspects of the Penn Mine <br />Facility, California. <br />Client: Sierra Club Legal Defense Fund mi behalf of The Committee <br />to Saue t}ie Mokelumne River <br />Contact: Maria Savasta-]{ennedy, Sierra Club Legal Defense Fund <br />and Bill Jennings, Committee to Saue the Mokelumne <br />Summary: Penn Mine is an abandoned copper and zinc mine near <br />5:4f1 pm <br /> <br />Page 7 of 11 <br />