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with herbicide application, will be properly licensed and/or certified to apply restricted or <br />general use herbicides as per Colorado statute and certification and licensing procedures <br />administered through the Division of Plant Industry, Colorado Department of Agriculture. <br />SCC currently has a weed control program in effect at the Seneca Mine operations. The weed <br />control program incorporates the following aspects: <br />• Spring <br />- Spot spraying of Canada Thistle, Houndstongue, Henbane, Toadflax with 2-4 D Amine, and <br />Tordon 22 k (mixed per labelinstructionsl. <br />-Spot spraying of whitetop with Escort, 2-4 D, and surfactant (mixed per label instructionsl• <br />Table 22-8 includes a list of herbicides that will be used at the Seneca II-W Mine. <br />-Chemicals applied using trailer-mounted and backpack sprayers <br />• Fall <br />- Spot spraying of Canada Thistle with Banvel, 2-4 D Amine and Tordon 22 k (mixed per label <br />instructional. <br />Chemicals applied using trailer-mounted and backpack sprayers. <br />• Follow-up monitoring conducted the following spring and retreatment as necessary. <br />• Mapping required by EPA pesticide standards will be kept on an aerial photo at mine office. <br />Large scale use of herbicides is not being promoted; however, they have a high level of utility when <br />controlling problem perennial weeds in permanent revegetation areas requiring reseeding, or where <br />surface stability in a shrub establishment area is critical. Any herbicides used will be based on <br />recommendations in the most current Colorado Weed Control Guide issued by the Colorado State <br />University Cooperative Extension Service. Prior to the application of any new herbicide, approval of <br />their use will be requested from CMLRD. The herbicides will be used according to the label and will be <br />applied under the supervision of certified applicators. <br />Periodic inspections will be conducted to identify potentially new infestations of noxious weeds on the <br />mine site. Grubbing prior to seed formation when they occur as individuals or small patches will control <br />some species including Henbane and other biennials that reproduce by seed. Otherwise, spot spraying <br />during the spring weed control program will provide the control. Table 22-8 includes a list of herbicides <br />that will be used at the Seneca II-W Mine. <br />Controlled areas will be monitored for effectiveness of the treatments. Follow-up treatments <br />will be conducted as necessary. Because of the many variables that may impact the <br />effectiveness of the control program and the aggressiveness of certain weeds, monitoring for <br />level of control and needed retreatment are critical aspects of the overall control program. <br />Ongoing revegetation monitoring and qualitative observation of reclaimed areas by reclamation <br />personnel will identify retreatment areas and any new areas of established weeds requiring <br />PR03 32 Revised 11/02 <br />