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Veritas Construction Inc ES-4011.03 <br /> June 17, 2016 Page 5 <br /> Revised June 22, 2016 <br /> ' Erosion Hazard <br /> According to EMC 37.080(A)(3), erosion hazard areas are defined as the following: <br /> • "High or very high" risk of erosion: <br /> ' o Those areas defined as high and very high/severe risk of erosion in the Dames <br /> and Moore Methodology for the Inventory, Classification and Designation or <br /> Geologically Hazardous Areas, City of Everett, Washington, July 1, 1991; <br /> o Areas includingslopes of 25 to 40percent in Qva and Qal geologic units, and <br /> g g <br /> slopes greater than 40 percent in other (not Ova or Qal) geologic units, and; <br /> o Areas including slopes of greater than 40 percent in Qva and Qal geologic units. <br /> • "Medium" risk of erosion: <br /> ' o Those areas defined as medium risk of erosion in the Dames and Moore <br /> Methodology for the Inventory, Classification and Designation or Geologically <br /> Hazardous Areas, City of Everett, Washington, July 1, 1991, when they contain <br /> debris and mud flows, gullying or rifling, immature vegetation, or no vegetation, <br /> and; <br /> Ia Slopes of 25-40 percent in other (not Qva or Qal) geologic units. <br /> Based on the referenced critical area maps and our field observations, areas meeting these <br /> criteria are located mostly in the southwest area of the site and along the west and north <br /> margins of the property. <br /> It should be noted that based on our investigation and site reconnaissance, areas of <br /> widespread severe erosion were not present. In any case, erosion is a process that can be <br /> managed. In this respect, provided appropriate temporary erosion and sediment control <br /> (TESC) measures are incorporated into final designs, erosion potential can be adequately <br /> mitigated during construction. Based on our experience with similar projects in similar settings, <br /> the permanent landscaping and drainage control measures will adequately mitigate the <br /> ' potential for erosion with respect to the proposed final development. Site-specific TESC <br /> measures should be prepared by the project civil engineer within the submittal plan set. <br /> ESNW should review the final TESC plans prior to construction to see that appropriate means <br /> of controlling off-site sedimentation are implemented and to provide supplemental <br /> recommendations, as necessary. <br /> I <br /> Earth Solutions NW,LLC <br />