1632 46TH ST SE 2020-06-18 - Laserfiche WebLink

July 3, 2017 Single-Family Residence 1,&A Job No. 17-079 Page 8 The surficial topsoil and weathered soil contain a high percentage of fines and can be easily disturbed when saturated. Earthwork in the wet winter season can cause significant complications for construction work. To minimize weather-related complications, grading and foundation construction work should proceed and be completed during the dryer period from April l to October 31st, if possible. Erosion protection and drainage control measures recommended in this report should be implemented for site stabilization if construction is to be carried out beyond the above dryer period. TEMPORARY DRAINAGE AND EROSION CONTROL The mite surficial weak soils are sensitive to moisture and can be easily disturbed by construction traffic. A layer of clean, 2-to-4-inch quarry spalls 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. A traffic. A silt fence should be installed along the downhill sides of construction areas to min* ze transport of sediment by storm runoff onto neighboring properties or the street The bottom of the filter cloth of the silt fence 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 interceptor trench drains may be discharged into a storm inlet if one is nearby. The storm inlet into which collected stormwater is to be discharged should be covered with a non-woven filter fabric sock to prevent sediment LIU .& ASSOCIATES, INC.