1230 MADRONA AVE 2016-01-01 MF Import

April 10, 2005 Proposed Single-Pamily Residence LXcA Job No. SA019 Page 8 SITG I'RCl'ARA7'ION AND GrNGRAL GI2ADING Site preparniion forthe construction ofthc residence should inclnde clearing and grubbing within construction limits. Loose topsoil, fill and weathered should be completely siripped within the Uuilding pad and in areas subject to traffic and structural ]oad. The exposed soils should be compactcd to a non-yiclding statc with � vibratory compactor. 7'hc on-site soils contain a high perccntagc of fincs amd �rc very sensitivc to moisture. A layer of clean c�uarry spalls should be pinced ovcr excavated �reas und areas of frequent traCfic, as requirccl, lo protcct the subgrade soils from disturbance by construction traffic. Silt fences should bc crcctcd along thc downslopc boundarics of the sitc to prevent sediments bcing transporled onto adjoining properties or the slrcel. Thc bottom edge of the silt fencc shoidd Uc embcdded in a trcnch .md b;illastcd with crushed rock or gravcl. 1�,aCAYA"I'ION ANU I� ILL SLOI'TS Under no circumstancc should excavation slopes be slecper than the Iimits specified by ]ocal, stale mid federal safety regtd�itions if workers have to perform constructiai worlc in exenvated arcas. Unsupporled tcmporary cuts grcater than 4 fccl in height should be no stceper than 1- 1/41I:1V in the surficial topsoil, fill ancl wcathered soils, and no steeper ihan 1/21-I:1V in thc widrrlying, dcnsc to vc�7�-dcnsc, glacial drift and ndvancc ouhvash soils. Pcrmancnt cut banks should bc no stceper tlian 21I:IV in the surficial loose topsoil, fill m�d weathered soils, and no steehcr Ihun 1-3/4] 1:1 V in the underlying, dense to very-dense, glacial drift and advancc out�vash soils. 'I'he soil units and the stnbility of cut slopes shoiild be observcd and verified by a geotechnical eugineer duriug excavation. Permancnt lili cmbankments required to support structur�l or traffic loads should be constnictcd ��ith compacted structural iill placed o��er proof-rolled, undisturbed, dense to very-dense, glacial drin :.md/or ach�ance ouhvash soils aRer tlie unsuitaUle surficial soils are stripped. Permanent fill LIU �C ASSOCIAT�S, INC.