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• The original design expectations and/or limitations as associated with a composite liner system <br /> comprised of(in ascending order): a self-sealing woven geosynthetic bentonite clay underliner, a <br /> 60-mil HDPE liner,and a non-woven geofabric-wrapped HDPE drainage net; <br /> • The general characteristics of the residual"process"solutions contained within the tailing storage <br /> facility, as derived from gravity separation processes and/or meteoric precipitation; <br /> • The general characteristics of the emplaced material(waste rock),as derived from an adjacent and <br /> upgradient area within the prescribed/approved area of disturbance; and, <br /> • Recognition of the specialized expertise required to effectuate a corrective action of this nature, as <br /> well as the necessity to identify various decision points and action-based alternatives that are <br /> critical to the overall success of the corrective action program. <br /> Given the above considerations, and in line with the proposed corrective action measures previously <br /> outlined in conceptual format in our letter of May 20, 2016,Venture provides incremental level detail and <br /> timelines for a staged(phased)corrective action program as follows. <br /> TASK 1 <br /> LOGISTICAL ASSESSMENT AND REMOVAL ACTION PLAN AND SPECIFICATIONS <br /> Objective: To assess all logistical parameters associated with site-specific requirements, contractor <br /> capabilities and availability, and in order to formulate contract specifications and performance guidelines <br /> for submittal to and acceptance by the Division. <br /> Timeline: Within 120 days of receipt of Division approval of this corrective action plan (i.e., this letter <br /> response to Adequacy Review No. 1). <br /> Venture is already engaged in direct contact with:(a)geosynthetic liner installation,repair,and certification <br /> experts;and,(b)general contractors capable of providing the specialized expertise and equipment necessary <br /> to effectuate removal of the non-approved material from atop the liner system. Information gained from <br /> these discussions is being utilized to formulate a general (conceptual) removal methodology and identify <br /> the appropriate liner integrity testing methodology(ies), from which Venture can outline the framework of <br /> the planned removal action,to be submitted to the Division as a separate document entitled"TR-3 Removal <br /> Action Specifications". <br /> With the framework defined,Venture will coordinate with the prospective civil/earthworks contractor(s)to <br /> complete requisite site inspection(s)and thereafter submit bids to accomplish the removal effort in general <br /> accordance with Venture's defined framework (and/or any valid contractor-recommended modifications <br /> thereto). <br /> Venture then anticipates completing both a technical and cost evaluation of the bids received. Based on the <br /> final selected removal methodology, Venture will prepare and submit (not later than 120 days following <br /> Division acceptance of this Plan) a detailed document entitled "TR-3 Removal Action Plan and <br /> 2 <br />