PERMFILE126866 - Laserfiche WebLink

Home Browse Search

The berms will be constructed to a minimum height of four (4) feet and a minunum width of twenty-one (21) feet from toe to toe at the base of the trapezoidal shaped berm. The berms may become proportionately lazger if the overburden and topsoil adjacent to the excavation is of sufficient quantity to justify the size without a long haul distance. The berm will be compacted to approximately to 95% of optimum and then seeded with western wheat grass to stabilize the soil for the long-term need of these earthen sediment control facility structures. This type of earthen structures will be used wherever the potential of erosion is present due to the topography. As noted in your review the pit is bisected by a lazge drainage and this type of earthen structure will be used to control the sedimentation from reaching into the waterways. This should help to prevent any sediment from reaching the major drainages. 3.) The applicant Leone Sand and Gravel, LLC will prepaze a Storm Water Management Plan (SWMP) and a Spill Prevention Control and Counter measure (SPCC) plan, for this site. As you know each SPCC plan, while unique to the facility it covers, must include certain elements. The elements required are that the SPCC plan be cazefully thought out, prepared in accordance with good engineering practices, and should address operating procedures that prevent oil spills; control measures installed to prevent a spill from reaching navigatable waters; and counter measures to contain, cleanup, and mitigate the effects of an oil spill that reaches navigable waters. To meet the above requirements a Storm Water Management Plan and a Fuel Berm Management Plan, plus a Spill Prevention Control and Counter Measure Plan will be done for this site. A permit from the Colorado dept. of Health & Environment Water Quality Control Division will also be obtained. Copies of all of the above plans and permits will also be sent to the Division of Minerals & Geology. Containers of lubricants and fuel will be stored on site. To contain the fluids if a tank should fail an earthen berm will have been constructed azound the tanks. The size of the berm will be lazge enough to hold 110% of the maximum storage of all the tanks and small containers. The capacity of the bermed area will be calculated as follows: Convert to cubic feet use 0.13368 to go from gallons to cubic feet. Therefore for example if a fuel has a capacity of 2000 gallons the formula to figure the bermed azea is 2000 gallons x 0.13368 = 267.36 cubic feet Assume a 3-foot deep bermed area Then to figure the azea of the containment area you would divide 3' into 267.36 c.f. = 89.12 sf Say the fuel tank is 10 feet dia. then divide 10' into 89.12 sf = 8.91 ft round up to 9 ft. Then a container 10' x 9' x 3 fr. deep = 270 cf is 100 % capacity then increase by 10% 270 cf x 1.10 = 297 cf say 300 cf 300cf = 10' x 3' deep x (X) 300cf/ 30sf = X THEREFORE X = 10 ft.