4305 RUCKER AVE 2018-01-01 MF Import

�. li Nortli Coast Construction Compa�iy rebruary 6, 1975 I :: ; ". W -] 260-30 Page Three of the lot. Throughout the rernainder of ihe site, the subsurface soiLs �vere �� sandy silts to sands �vith occasional gravel. Seepage �vas observed at the t�ottom of the excavation apparently com- �� ing from the intertace bet�veen the fill material and soils in the bottom of the trenches. �. DISCUSSION AND RECOMh4ENDATIOi�� G2neral Basr.d on the results of our field esploration and laboratory testing, and engineeri�� analyses, it is our recommendation that the proposed build- '` ing be supported on granular compacted fill witl� the design bearing value of 4000 pounds per squarefoot. Foundations Due to the relatively fir�n conditions of the soils beneatli the footing excavaiions, it is our recommendatiun that the proposed structure be sup- ported on sl�allow footings bearing on structural fill with the design bearing value of 4000 psf and at tlie depths sliown on the building plans. Estimated maximwn total settlements sl�ould be on tUe order of one- half inch, with differential settlements less tl�an one-quarter inch. Footing excavations should be inspected by the SoiLs Engineex• prior to placing concrete to as;,ure that site conditio�ts are consistent «�ith our recommendations. Structural Fill Prior to placing fill, the excavations should be cleaned out of all soft and wet soil. The water seepage shotild be controlled Ly placing a layer of free draining gravel at the bottom of the trench, or with sump lwmps, or a comUination of both. The fill areas should extend a minimwu of 18 inches be}�ond all footing perimeters. I�'ill sliould consist of granular matcrial containing less than 5%o fines passing the No. 200 sieve. Fill should bc I)1�1CCCI 111 111131117U111 6-incl� lifts and compacted to at least 95`% of laboratory ma.ximum diy density per ASTM: D-1557-70. The structural fi!1 sLould be tested and approved b}� the Soils �ngiireer or his represenlative. Slab-on-Grade The proposed slab-on-�;rade should I�e sul�porled on a minimwu of 2 feet of stivcttn�al fill. Prior to placing fill, the etiisting surface should G�OS-.A33E�, INC.