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KLE/NFELOER \\ J/Bright People.RIghY So7etFons. V calculated pavement section. However, the soils beneath the planned cement or lime-treatment section should be at above optimum moisture content prior to lime treating. Table 5-5 Asphalt Concrete Pavement Sections —Lime Treated Subgrade Asphalt Concrete Class 2 Aggregate Base Traffic Index inches inches Lime-Treated Soil (inches) 5 3'/2 4 12 (minimum) 6 3'/2 4 14 7 4 4 15 8 5 4 17 9 5'/Z 5'/2 18 (maximum) The pavement sections provided above are contingent on the following recommendations being implemented during and following construction. • All trench backfills, including utility and sprinkler lines, should be properly placed and adequately compacted at above optimum moisture content to provide a stable subgrade. All backfill within the streets should be completed prior to cement/lime treating the street subgrade. • Lime-treated subgrade should be kept moist by periodic watering until aggregate base is placed if it will be placed within three days. If aggregate base will not be placed within three days, a sealing compound should be placed on the lime-treated subgrade. • Aggregate base material should conform to the specifications stated in Section 26 of the Caltrans Standard Specifications and be compacted as engineered fill to at least 95 percent relative compaction. • Asphalt paving materials and placement methods should conform to Section 39 of the Caltrans Standard Specifications, latest edition. • 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 20210067.001A/ST020R111447 Page 28 of 37 May 11, 2020 ©2020 Kleinfelder www.kleinfelder.com