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The soils for this project were found to be Alderwood gravelly sandy loam. These soils <br /> have characteristics that do not allow infiltration. Due to the previous grading conducted in <br /> this area and portions of the new pavement slope being 15 percent, dispersion of the <br /> runoff is not feasible along the entire edge of the proposed improvements. However, as <br /> noted sheet flow dispersion will be utilized to the maximum extent feasible. <br /> Finally, any area of the site not proposed to be covered with impervious surfaces but <br /> graded or compacted will be treated to meet the criteria for DOE BMP T.5.13. Please <br /> refer to the engineering plans for the locations of the soil amendments and additional <br /> details. <br /> 8. SUMMARY <br /> This project proposes to construct less than 5,000 sf of new/replaced impervious surfaces <br /> including on-site and off-site areas. As a result, the use and land cover for less than 5,000 <br /> sf of the site will be converted from pervious lawn or gravel to impervious surfaces <br /> (pavement). Stormwater management techniques have been incorporated into the design <br /> to mitigate for this land conversion. In addition, based on the proposed improvements for <br /> the site drainage design the post developed runoff from the site is expected to match or <br /> slightly increase over the runoff from the existing system. Therefore, the stormwater <br /> design for this project has met or exceeded all the applicable Minimum Requirements 1-5. <br /> • <br /> Royell Manufacturing 15-0714 <br /> July 2017 Page 11 <br />