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KLE/NFELOER �Bright People.Right Solutions. • Thickened edges should be used along outside edges of concrete pavements. Edge thickness should be at least 2 inches greater than the concrete pavement thickness and taper to the actual concrete pavement thickness 36 inches inward from the edge. Integral curbs may be used in lieu of thickened edges. • Overfinishing of concrete pavements should be avoided. Typically, a broom or burlap drag finish should be used. • Adequate drainage (both surface and subsurface) should be provided such that the subgrade soils and aggregate base materials are not allowed to become wet. Pavement sections should be isolated from intrusion of water at all locations where pavements are adjacent to irrigated landscaping or areas that may pond water. For long-term performance, pavement edge drains should be placed to collect water and to convey it to a storm drain or other drainage facility. As an alternative, but one that tends to be less effective, edge barriers, such as concrete curbs, polyethylene membranes and the like, should be placed that extend a minimum of 4 inches below the aggregate base and into the subgrade soil. Additional details regarding these systems can be provided upon request. • Periodic maintenance should be performed to repair degraded areas and seal cracks with appropriate filler. 5.10 STORM DRAINAGE SYSTEMS 5.10.1 Basins Two percolation tests were performed by a representative from our firm on April 18, 2020 along the northern edge of the site at depths of approximately 3 and 5 feet below existing grade. The approximate locations of the test holes are shown on Figures 2 and 3. The following table presents the calculated percolation rates in gallons per square foot per day (gfd)for the tests based on the last 30 minutes of the tests. 20210067.001A/ST020R111447 Page 31 of 37 May 11, 2020 ©2020 Kleinfelder www.kleinfelder.com