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control plan is described in more detail in Section 4.0 of this report and in the project <br /> plans. <br /> 3.2.3 M.R.#3—Source Control of Pollution <br /> The proposed project consists of track and field improvements to an existing school <br /> site,and subsequently,is not subject to the water quality source control requirements as <br /> defined in the 2010 Stormwater Management Manual for commercial developments. <br /> Upon review of Volume IV of the manual, there are no known activities that are <br /> potential sources of pollutants in stormwater. <br /> 3.2.4 M.R.#4—Preservation of Natural Drainage Systems and Outfalls <br /> As previously mentioned, the existing drainage system will primarily remain in place. <br /> Currently, stormwater runoff from the project area flows east through a series of catch <br /> basins and pipes to the existing storm detention pond near the school's east property <br /> line. Stormwater runoff released from the pond discharges into the drainage system in <br /> East Casino Road. Upon project completion, stormwater runoff will continue to flow <br /> east to the site's existing discharge location in East Casino Road. No diversion of <br /> stormwater runoff is proposed. <br /> 3.2.5 M.R.#5—On-site Stormwater Management <br /> Stormwater management Best Management Practices(BMP's)have been implemented <br /> throughout the project site to infiltrate, retain, and disperse stormwater runoff on-site <br /> without causing flooding or erosion impacts. <br /> 4.0 ESC ANALYSIS AND DESIGN <br /> The proposed development will comply with guidelines set forth, in the 2010 Stormwater <br /> Management Manual. The plans include erosion/sedimentation control features designed to <br /> prevent sediment-laden runoff from leaving the site and/or adversely affecting critical water <br /> resources during construction. <br /> 4.1 ESC Plan Analysis and Design <br /> Temporary erosion control facilities will be installed prior to any construction activities. The <br /> construction period is scheduled from late May to late August,which should significantly reduce <br /> the likelihood of discharging turbid stormwater downstream. Erosion control best management <br /> practices will include silt fencing, catch basin inlet protection, straw mulch, and plastic covering. <br /> Existing paved driveways and other hard surfaced areas will be utilized for construction access to <br /> minimize erosion/sedimentation. The most effective erosion control measure is to maintain <br /> adequate groundcover. Maintaining cover measures over disturbed soils will greatly reduce <br /> turbid runoff and sediment transport. These best management practices are incorporated into the <br /> erosion control design. <br /> The erosion potential of the site is influenced by four major factors: soil characteristics, <br /> vegetative cover, topography, and climate. Erosion/sedimentation control is achieved by a <br /> combination of structural measures,cover measures,and construction practices that are tailored to <br /> fit the specific site. An erosion and sedimentation control plan has been prepared for the <br /> Contractor's use during construction and is included with the engineering plan submittal. <br /> Technical Information Report <br /> Cascade High School—Track Replacement Project 4 Integrityworks Consulting Engineers,LLC <br /> Project No.212104 <br />