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Accordingly, the non-authorized waste rock materials will be excavated/removed from atop the <br /> liner system using excavation techniques selected specifically to minimize or preclude damage to <br /> the underlying composite liner system; and the excavated materials will be transported upslope <br /> to the designated staging/stockpile area for interim storage and stabilization. <br /> VRI anticipates that placement of the material will be carded out in a manner that minimizes the <br /> areal extent of the stockpile; that is, efforts will be focused on stacking the material or placing it in <br /> lifts to minimize the stockpile footprint area and to consolidate/stabilize same. <br /> Post-CAP management of the stockpiled material will be dependent on findings relative to the <br /> extent of damage, if any, to the composite liner system. VRI will, at that time, make a <br /> determination as to whether the materials constitute stockpiled "ore" feedstock for future milling <br /> operations; or, alternatively, will be subject to "abandonment in place" (i.e., not a component of <br /> future operations). In the event of the latter, VRI will address the stockpile in a manner not <br /> inconsistent with reclamation obligations specified within DRMS Permit No. M2009-076. <br /> 1.6 Management of Solid Matrix Tailing Materials <br /> The surface of the solid matrix tailing material, at this juncture, remains largely exposed, excepting <br /> minor portions which may underlie the toe run-out zone of the emplaced non-approved waste rock <br /> materials. Inasmuch as there is no evidence of the emplaced waste rock materials having had <br /> direct contact with the composite liner system in the area underlying the tailing material, Venture <br /> will not attempt to remove or otherwise significantly disturb the tailing matrix material. This can <br /> be readily accomplished as the interface between the two materials is visually discernible and <br /> observation of the interface can be utilized to guide field (excavation) activities. To the extent <br /> minor quantities of tailing may be encountered/excavated, the material will be managed in the <br /> same manner as that employed for the non-approved waste rock materials. <br /> 1.6 Groundwater Monitoring <br /> As a component of the previously approved Technical Revision 3, VRI voluntarily committed to <br /> an enhanced groundwater quality monitoring program. The enhanced program increased the <br /> groundwater monitoring frequency from a previously approved quarterly (i.e., once every three <br /> months) interval to what is currently a monthly frequency. This enhanced groundwater monitoring <br /> program was undertaken by VRI to provide more timely detection of potential seepage, if any, <br /> attributable to the potential compromise of the composite liner system. <br /> To date (i.e., since approval of Technical Revision 3), three (3) groundwater monitoring events <br /> have been carried out, on the following dates, with the results as indicated below in Table 1-2: <br /> Enhanced Groundwater Monitoring Program Results (copies of monitor well sampling reports <br /> have been previously provided to DRMS under separate cover; however, duplicate <br /> documentation is herein provided as Attachment III: Groundwater Monitoring Reports). <br /> 8 <br />