5109 SOUND AVE 2017-08-02 - Laserfiche WebLink

July 21, 2014 Two Single-Family residences L&A 1ob No. 14-065 Page 9 TEMPORARY DRAINAGE AND EROSION CONTROL The onsite surficial topsoil, disturbed soil and weathered soil contain a high percentage of fines which are sensitive to moisture and can be easily disturbed by construction traffic. A layer of clean, 2-to-4-inch quarry spails should be placed over areas of frequent traffic, such as the entrance to the site, as required, to protect the subgrade soils from disturbance by construction traffic. A silt fence should be installed along the downhill sides of construction areas to minimize transport of sediment onto neighboring properties or the streets. The bottom of the filter cloth of the silt fences should be anchored in a trench filled with onsite soil. Intercepting ditches or trench drains should be installed around construction areas, as required, to intercept and drain away storm runoff and near-surface groundwater seepage. Water captured by such ditches or trench drains may be discharged into a nearby storm inlet. The storm inlet should be covered with a non-woven filter fabric sock to prevent sediment from entering the storm sewer system. The filter sock should be cleaned frequently during construction to prevent clogging, and should be rcmoved after completion of construction. Spoil soils should be hauled off of the site as soon as possible. Spoil soils and imported structural fill material to be stored on site shauld be covered with plastic tarps securely weighted down with sandbags, as required, for protection against erosion. LIU & ASSOClATES, INC.