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• 2.05.3 <br />• <br /> <br />PR-06 <br />~~~ROV~ <br />~~15/oZ <br />Run-off from the material storage area and haul road is directed to ditch D- <br />E1. Sediment traps will be installed in ditch D-E1 as shown on Map 21-1. <br />The sediment traps will be straw bales, silt fences or other approved devices. <br />The sediments traps will slow and remove sediment from the run-off from the <br />material storage area and haul road. The sample point for this SAE near the <br />dewatering valve for pond C. <br />Run-off from the pump station located near the Deer Trail Ditch will not be <br />contained in a sediment pond. The pump station is located below old State <br />Highway 133 in a location where sediment pond construction would be <br />difficult. Run-off from the area disturbed by the pump station construction <br />will be filtered through a sediment trap such as straw bales, silt fences or <br />other approved devices. The location of the sediment trap for the pump <br />house is presented on Map 21-1. <br />Run-off from the gob pile topsoil pile and the coverfill stockpile will not be <br />contained in a sediment pond. The rationale for the SAE for these two areas <br />is presented in Volume IV. The sample points for these two SAES will be <br />Ditch D-F3 beyond and to the east of the coverfill stockpile. <br />The vent shaft pad located in Freeman Gulch will be considered a small area <br />exemption. The operatorwill monitor the flow from the small area exemption <br />to assure compliance with 4.05.2(3). The operator will use its best efforts to <br />obtain samples. The samples will be analyzed for pH, conductivity and total <br />settleable solids. Samples will be in compliance if they contain settleable <br />solid levels of 0.5 mVl or less and the pH is greater than 6.5 and less than <br />9.0. <br />Run-off from the vent shaft pad does not go through a treatment facility such <br />as a sediment pond. Run-off from this pad will be filtered through one of <br />two sediment fences. Sedimenl fence #1 is 130-feet long with a tie back of <br />5-feet. Sediment fence #2 is 30-feet long with a tie back of 5-feet. Design <br />of the sediment fences is presented in Volume III, Exhibit 8 beginning on <br />page Exh-8 - 87. Flow will be routed to the sediment fences with a series of <br />berms as shown on Map 35. <br />2.05 - 32 - 8/01 <br />