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' I; V II i it methods are contained within the approved DMG permit application. Best management practices foi the areas listed in Section 5 are described in detail below. i III -Trailer and Topsoil Stockpile SAE I The trailer pad and adjacent topsoil stockpile constitute a small disturbed area isolated from drainage control access to the sediment pond. The existing approved runoff control for this area includes a stockpile containment ditch, and berms and graveled road surfaces for the trailer pad. The topsoil has adequate vegetation to limit erosion. In addition, the containment ditch is designed to contain the 10 year, 24'hour - - -storm event: Designs forthe containment ditch are attached in Exhibit 1. I The topsoil stockpile containment ditch and graveled road provide adequate stormwater sediment control. The containment ditch and mad , as designed and maintained, provide ]ow potential for significant adverse impacts to State waters. -Mine Access Road (Lower Section} Storm runoff from the lower section of the mine access road (approximately 1130 feet length,! 20 feet width) is not controlled under effluent limitations. Energy Fuels maintains a gravel surface on the toad, and maintains the road and associated ditches. The road has not shown indications of significant erosion'or deposition of sediment to adjacent drainages. ' '. Storm runoff and sediment wntrol are being provided by maintenance of the existing road surface. The road access, as designed and maintained, affords low potential for significant adverse effects to State waters. I -Sediment Pond Embankment l'h~tslope l The mine site contains one sediment pond with an embankment and associated outslope. In order to control erosion and runoff from the pond embanlanent outslopes, embanlm~ent top and outslope have' been revegetated. ~ j The total area of the pond embanlmtent top and outslope is relatively small and well vegetated. Since no discharge other than stormwater runoff occurs from this area, and vegetative cover is maintained, there is low potential for significant effects to State waters. -Santa Fe Leases No. 1 and No. 2 j Storm runoff at the Santa Fe leases (3.32 acres total) is controlled by containing runoff in tliiee designed; non-discharging sumps. The sumps are designed to contain the runoff from the 10 year, 24 hour event in the separate lease areas. Design calculations for the sumps and associated drainage control structures are included in Exhibit 1. Energy Fuels is currently in process of completing final reclamation of both Santa Fe leases lin ' accordance with the DMG permit application. Concurrently, Energy Fuels is working with the DMG and'the Santa Fe Railway Co. to verify and agree on post-reclamation drainage and sediment control. Any revisions , to the existing permit will be submitted to the Department of Health as an amendment request following initial approval of any revisions by the DMG. Given the small area and flat terrain of the railroad yards, and compaction of the yard surfaces, there is low potential for significant adverse effects to State waters from storm mnoff. i ' i r ,I -Burlington Loadout Lease '!, The Burlington lease area is a small (3 acre) site with anon-discharging sump to control storm '..runoff according to the DMG permit. This site has been completely reclaimed by Energy Fuels, nofifica6on o£which has been submitted to DMG as a request for full bond release: Since completion,of reclamation; theaite'and adjacent lands have been purchased by the City of Trinidad. The City bas completely re-worked. . the sde m preparation for their plans for an industrial site. ',Y '{ 3~it~ -~ i { Ya E A w~YS f ~ ~ ~ ~ ~ 1 S,~ ;. 52 nrr ~ 'i. r t a.` H~ I < Y `fiN ~ ' f 1 i Yelr n a x E , '-e w{ . ~ ~ ! rat t :"~' uA sf ~ a t ~ t> . ._ e 7 t i :~:a{fib ~2[wtl N4 $.a"..A d..~b4~ ~v~~b.. ~~~A