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equipment. Targeted weeds should be spot sprayed to minimize potential impacts to <br />surrounding desirable vegetation. Broadcast applications can be made to large weed <br />infestations where spot spray applications are not a practical means of control. All <br />herbicides must be applied under the supervision of a Colorado Licensed Commercial <br />Pesticide Applicator in compliance with applicable laws. Under the Colorado Pesticide <br />Applicators Act proper records must be kept of all herbicide applications. All records will <br />be compiled in an annual report and made available to CC&V. <br />3.4 Adaptive Management <br />Even with active weed management strategies, it often takes several seasons to bring <br />weed populations to an acceptable level. With well-established infestations it is likely <br />that a seed bank has developed in the soil capable of producing new plants for several <br />years. An infestation of weeds can easily re -invade treated areas in one growing season if <br />control and treatment activities are prematurely curtailed. Weed management efforts <br />should be carried out every growing season to achieve effective weed management within <br />the target area. Often the large up -front investment in weed management can be reduced <br />to a basic "maintenance" level of keeping noxious weeds in check on the site. <br />As with all weed management, this multi -season effort is best served by effective <br />documentation of infestations and control efforts and continued vigilance in successive <br />seasons of management. New species of noxious weeds may enter the treatment area and <br />may require different methods and timing for effective control. Monitoring should take <br />place regularly to identify new infestations and evaluate treatment effectiveness. <br />Monitoring is also important to document long-term effects of weed management. If <br />management activities are not reducing infestations on the mine, the plan needs to be <br />modified to more effectively target the problem. Continued evaluation and modification <br />to the Weed Management Plan (i.e. "adaptive management") provides for the most <br />successful weed management programs. <br />4 Pesticide Safety <br />Understanding a pesticide's chemical nature is also important in minimizing impacts to <br />non -target species, the applicator, endangered species, and pollinators; as well as <br />preventing surface water runoff hazards and leaching into groundwater. <br />All pesticides must be handled with care, and applied by Colorado licensed/qualified <br />personnel. Product labels will be read before use, and handling and application directions <br />followed. Equipment must be properly calibrated before herbicides are applied. Special <br />protective clothing is specified on the label and appropriate Personal Protective <br />Equipment (PPE) will be used. Empty containers will be disposed of promptly, safely and <br />accordance with product labeling. <br />Herbicides vary in the amount of time after an application before it is safe to re-enter the <br />treated area without protective clothing and equipment. The Restricted Entry Interval <br />("REI") is affected by the rate of application, size of the area treated and the amount of <br />time to be spent in the field. The REI applies to areas of used for grazing of cattle or other <br />livestock. For the safety of CC&V's employees and contractors, the REIs listed on <br />Cresson Project Weed Management Plan 6 <br />