5107 SOUND AVE 2017-01-14 - Laserfiche WebLink

July 21, 2014 Two Single-Family residences L&A Job No. 14-065 Page 19 We recommend that a layer of compacted, 7/S-inch crushed rock base (CRB), be piaced for the driveways. This crushed rock base should be at least 6 inches thiek. The crushed rock base shauld be overlain with a 3-inch asphalt treated base (ATB) topped by a 2-inch- thick C1ass B asphalt concrete (AC) surficial course or 5-inch reinforced concrete pavement for the driveways. DRAINAGE CONTROL Bnilding Footprint Excavation Building fooiprint excavation for proposed residences, if encountering groundwater se�nag�, �houlc� h�� th� l��t�rr� c�f �xc�v��ior� sl��d sli�htly ar�d ditcY�es exc�vat�d a�c�ng '�ases oi ihe cu-t %anlcs �co cdi�ec� cc�llected groundwaier iYito su��p pi�s �oi�i whic� water can be pumped out. A layer of 2-inch crushed rock should be placed over footing bearing subgrade soils, as required, to protect the soils from disturbance by construction traffic. This crushed rock base should be built to a few inches above groundwater level, but not less than 6 inches thick. The crush rock base should be compacted in 12-inch lifts to a non-yielding state with a vibratory mechanical compactor. Runoff over Impervious Sarfaces Storm runoff over ixnpervious surfaces, such as roofs and paved driveways, should be collected by underground drain line systems connected to downspouts and by catch basins installed in paved driveways. Stormwater thus collected should be tightlined io discharge into a storm sewer or suitable stormwater disposal facilities such as infiltration trenches. LIU & A.SSOCIA�'ES, INC.