3505 SHORE AVE 2016-01-01 MF Import

Geotechnfcal Engineering Lctter 3505 Shore Avenue Deck Addidon Evered,Wssh�ngton May 26,2010 NGA File No.827110 Pege 10 values incacporate safery factors of 1.5 and 2.0 applied to the�stimated ultimate values for frictioml end passive resistance, rospectivcly. To achieve this value of passive rosistana, the foundations should be poured "neaY' against the native medium dense soils or compected fill should be placed against lhe faoting. We r.commend that ttw upper one•foot of soil be neglected whea calculating the passiw resistence. Structural�ll General: We do not anticipate large scale fill placement for this projxt; however, fill placed benwth foundations, pavement, or other settlemcnt-sensitive sWctures should be placed as swctural Sll. Shuctural fill, by definition, is placed in accordance with pisscribal methods and standuds, end is monitored by an experiencxd geoeechn�cal professiot al or soils technician. Field monitoring procedures would include the perfotmance of a �epresentative number of in-place density tests to document the attainment of thc dcsired degree of relative compaction. The azca lo rxeive the fill should be suitably prepared as described in the Site Preprracioo and Greding subsection prior to be�nning fdl plecement. M�terisls: Shuctural fill should consist of e good quality, gtanular soil, fra of organics and othcr delderious material and be well�aded to a maximum siu of about thrce inches. All-weether fill s6ould contain no more than five-percent fines(soil finer ihan U.S.No.200 sieve,based on thal fracdon passing thc U.S. 3/4-inch sieve). The use of on-site non�organic soils as sttucturel SII should gene�ally be feasible,but will bc dependent on moisture conteut of the soil at the time construcGon lakes place. 'Cbe on-site soils should be able to be used as suuctutal fill pro�ided these materials are near the optimum moisturc content. We should be ceteined ta evaluate proposed sWctural fill materials prior to construction. Fill Placement: Following subgrade prepardtion, placemenl of stn�ctural fill may proceed. All filling should be accomplishcd in uniform lifis up to eiE;ht inches thick. Eech lift should be sprcad evenly and be thoroughly compacted prior to placement of su�scquent lifts. All structural fill undedying building arees and pavement subgrade should be compactcd to a minimum of 95 percent of its maximum dry deasity. Maximum dry density, in this letta, rofers tu that density ae detrnnined by the ASTM D-1557 Compaction Test procedure. The moistwe contcnt of the soils to be compacted should be within about two percent oC optimum so that a readily compactable wndition exisu. It mey be necessary to over- NF_LSON GEOTECHNlCAL ASSOCIATES, INC. � 1'�(� 1 /