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project. <br /> • Upon completing excavation and hauling activities, grade <br /> excavation slopes to a maximum 3:1 gradient. Salvaged <br /> topsoil, previously placed in the perimeter berms, will be <br /> spread over the disturbed areas. <br /> • Perform disturbed area reclamation as suggested. This will <br /> include the application of seeding mix and straw mulch. This <br /> scenario will maximize and expedite the revegetation of the <br /> disturbed areas while minimizing the potential for erosion or <br /> stormwater runoff and/or erosion. <br /> C. Estimates of Area Involved <br /> Total area disturbed= 12 acres <br /> Borrow excavation= 11 acres <br /> Haul Road= 1.0 acres <br /> D. Runoff Coefficients and <br /> Soil Data <br /> Runoff coefficients were taken from the "Standard Requirements for <br /> Storm Drainage Design Criteria and Construction Standards" by the <br /> Weld County Tri- Area Sanitation District. The C values are: <br /> Undeveloped condition, l0yr. Storm: 0.25 <br /> The site soils are identified by the Soil Conservation Service as <br /> belonging to the Osgood Series which are described as deep well <br /> drained soils that formed in wind-blown sand deposits. These soils are <br /> well drained with low runoff potential and exhibit a high to very high <br /> saturated hydraulic conductivity. Per the Soil Conservation <br /> Service, due to their sandy nature, low organic content and <br /> droughtiness, Osgood soils are best suited for rangeland use <br /> - this is the current use of the borrow area. <br /> E. Existing Vegetation <br /> The site is currently has a small patch of farmland used for sugar beets <br /> F. Potential Pollution Sources <br />