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PART I <br /> Permit No.: COR400000 <br /> Control measures for erosion and sediment control may include, but are not <br /> limited to, wattles/sediment control logs, silt fences, earthen dikes, drainage <br /> swales, sediment traps, subsurface drains, pipe slope drains, inlet protection, <br /> outlet protection, gabions, sediment basins, temporary vegetation, permanent <br /> vegetation, mulching, geotextiles, sod stabilization, slope roughening, maintaining <br /> existing vegetation, protection of trees, and preservation of mature vegetation. <br /> Specific non-structural control measures must meet the requirements listed below. <br /> Specific control measures must meet the requirements listed below. <br /> (a) Vehicle tracking controls shall either be implemented to minimize vehicle <br /> tracking of sediment from disturbed areas, or the areas where vehicle tracking <br /> occurs shall meet subsection Part 1.B.1.a.i(b); <br /> (b) Stormwater runoff from all disturbed areas and soil storage areas for which <br /> permanent or temporary stabilization is not implemented, must flow to at least <br /> one control measure to minimize sediment in the discharge. This may be <br /> accomplished through filtering, settling, or straining. The control measure <br /> must be selected, designed, installed and adequately sized in accordance with <br /> good engineering, hydrologic and pollution control practices. The control <br /> measure(s) must contain or filter flows in order to prevent the bypass of flows <br /> without treatment and must be appropriate for stormwater runoff from <br /> disturbed areas and for the expected flow rate, duration, and flow conditions <br /> (i.e., sheet or concentrated flow); <br /> (c) Outlets that withdraw water from or near the surface shall be installed when <br /> discharging from basins and impoundments, unless infeasible. <br /> (d) Maintain pre-existing vegetation or equivalent control measures for areas <br /> within 50 horizontal feet of receiving waters as defined by this permit, unless <br /> infeasible. <br /> (e) Soil compaction must be minimized for areas where infiltration control <br /> measures will occur or where final stabilization will be achieved through <br /> vegetative cover. <br /> (f) Unless infeasible, topsoil shall be preserved for those areas of a site that will <br /> utilize vegetative final stabilization. <br /> (g) Minimize the amount of soil exposed during construction activity, including the <br /> disturbance of steep slopes. <br /> ii. Practices for Other Common Pollutants <br /> (a) Bulk storage, 55 gallons or greater, for petroleum products and other liquid <br /> chemicals must have secondary containment, or equivalent protection, in order <br /> to contain spills and to prevent spilled material from entering state waters. <br /> (b) Control measures designed for concrete washout waste must be implemented. <br /> This includes washout waste discharged to the ground as authorized under this <br /> permit and washout waste from concrete trucks and masonry operations <br /> contained on site. The permittee must ensure the washing activities do not <br /> contribute pollutants to stormwater runoff, or receiving waters in accordance <br /> Part I.A.1.b.ii. Discharges that may reach groundwater must flow through soil <br /> Page 7 of 33 <br />