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C. Provide an iso-settlement map showing the change in <br /> elevation from the map produced at the time of closure <br /> and the most recent topographic map with a maximum <br /> contour interval of two feet. <br /> FINAL SITE FACE <br /> Final landfill slopes are vegetated with Bromme grass. The <br /> vegetation helps stabilize slopes and reduce erosion. The rooting <br /> depth of the grass will not exceed the thickness of the one foot <br /> vegetative cover layer, so the clay barrier layer will not be <br /> disturbed. The site was hydroseeded at the beginning of the rainy <br /> season, therefore no irrigation was necessary. The grass will be <br /> fertilized annually as needed, but will not require irrigation <br /> other than natural rainfall . <br /> DRAINAGE CONTROL <br /> The drainage facilities are designed in accordance with the County <br /> of San Joaquin Department of Public works, Manual for Storm <br /> Drainage Design (January 1973 ) , except that the drainage facilities <br /> at the landfill are sized to accommodate the volume and peak flow <br /> rate expected from a storm having a 100 year-24 hour frequency <br /> instead of the 10 year frequency . The drainage facilities also <br /> 6 <br />