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COR-030000 Stormwater Management Plan <br />Miguel County. The individual mine access roads are also dirt and gravel and are <br />40 maintained by Denison. All vehicles entering and exiting the sites will be limited to these <br />designated access roads. Road maintenance activities include using motor graders when <br />necessary. <br />7? W&vle JKanagement andl>irpa.r4 1ffc"4Ye Concrete Washout (,¢I. C.I c)7? <br />i) Solid Waste <br />The majority of solid waste will be collected, removed from site, and properly <br />disposed. If larger quantities are generated than can be handled by individuals on <br />site, then dumpsters will be provided in convenient, level locations away from traffic <br />areas, drainage areas, or retention areas. A licensed company will be contracted to <br />empty the dumpsters, as needed. The site project managers will be responsible for <br />monitoring the site to ensure that all site personnel and subcontractors use the proper <br />waste disposal practices and facilities. <br />ii) Concrete washout activities <br />No concrete pouring activities are anticipated for this project; therefore a concrete <br />wash-out is not designed. If needed in the future for concrete activities, one will be <br />designated to capture waste water and waste products resulting from the cleaning of <br />concrete and masonry equipment. A concrete wash-out may not be necessary if all <br />wash-out operations are performed off-site. If a concrete wash-out is needed, it will <br />be installed or provided prior to any activities that include the handling of materials <br />containing cement (e.g. concrete, masonry, etc.) Concrete wash-outs may include <br />small excavations located near the point of concrete masonry placement, geotextile <br />bags, water tight vessels such as rigid children's pools, small dumpsters, buckets, or a <br />mobile disposal unit, etc. Concrete wash-outs require appropriate access control, <br />tracking and containment. Signs will be placed at the washout area and elsewhere as <br />necessary to clearly indicate the location of the Concrete washout. If needed, the <br />designated washout facility or facilities will be installed on site and the locations <br />added to the site plan. <br />Maintenance may include the removal and proper disposal of excess material, <br />cleaning or replacing the tracking material and general structural integrity of the <br />installation, as needed. Concrete wash-outs will be cleaned of excess water and <br />solids on a regular basis to maintain the proper function of the BMP. The hardened <br />concrete and/or excess wash water shall be hauled away by an approved contractor to <br />a designated facility designed to receive such materials. <br />No concrete waste will be discharged directly onto the ground without a containment <br />feature. Concrete washout water shall not be discharged to state surface waters or to <br />storm sewer systems. If unlined pits are used to contain concrete washout water, the <br />following management practices must be implemented: <br />Denison Mines (USA) Corp. Sunday Mines SWMP <br />20