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All fuel tanks will have secondary containment. Some are double walled, others will be located <br /> within bermed or lined areas that have over 110%of the volume of the largest stored tank. Any <br /> spills of fuel or other hazardous material will be reported to the Division as soon as they are <br /> discovered. <br /> No night mining activities are scheduled for the operation; however, portable lighting may be <br /> used within the permit area from time to time. Portable lights will only be used for equipment <br /> maintenance within permitted hours of winter months while daylight hours are shorter. Portable <br /> toilets will be used for employees. All mining structures currently on-site are shown on Map C- <br /> 1. The portable mining equipment such as loaders, dozers,trucks and excavators will be <br /> serviced on-site as needed. Upon reclamation, all portable equipment will be removed from the <br /> site. <br /> It is extremely unlikely that any toxic or acid-producing materials will be encountered during the <br /> mining operation as none were encountered in the past and the mined material is alluvial in <br /> nature. However, in the event that such materials are encountered,they will be covered with <br /> overburden and topsoil from on-site resources to depths outlined in the reclamation plan and no <br /> more mining will occur in the area. <br /> The Operator will clearly mark the permit boundary with stakes surveyed on-site.No <br /> Trespassing signs are posted along all boundaries. Speed limits and other traffic control signs are <br /> found throughout the site and around the operation area. Water and/or magnesium chloride is <br /> applied to all roads to keep dust down while mine vehicle traffic occurs. <br /> County Roads 24, 24A, and 10 will be used to access the site. Only existing access points from <br /> these roads will be utilized, see Map C-2 for access locations. When possible, internal roads will <br /> be used and/or improved rather than building new roads across the site. No hauling will be <br /> necessary from the site,thus no acceleration or deceleration lanes are required. <br /> The Box Creek Placer Mine will use multiple sediment sumps to trap all runoff from a 100 year <br /> 24-hour rain event within the active mining areas. These sediment settling/storm water ponds <br /> are located throughout the site and will be regraded during reclamation, see Maps C-2 and F-1. <br /> Slopes in the area of drainages will be maintained at or shallower than 2H:IV. Additional <br /> Box Creek Placer Mine c.rcg 1r icki and Assonants.PLLC <br /> September 2018 D-9 <br />