1401 MERRILL CREEK PKY #13 2016-01-01 MF Import

FF Development LP December 1,2006 Page 2 reports has been provided to you during construction and also has been fonvarded to the on-site FF Development Construction office. FILL MATERIAL EVALUATiON AND REQUIRED COMPACTION On-site soils were used as fill and backfill at the site. We evaluated fill placement activities within the 1'od 2 area where auilding Nos. 10 and 15 are located during the mass grading period on 7 occasions between July 19, and July 28, 2005 (refer ta field report Nos. 24 thmugh 31). We also completed 1 site visit on August 3, 2005 (refer to field report No. 35) to evaluate compaction of the fill placed within building No. 10 in the Pod 2 area. We evaluated the fill soil by perfortning laboratory testing that generally consisted of maximum dry density (MDD) evaluations per American Sociery for Testing and Materials (ASTM) D1557 testing procedure. The fill used within the building footprint area, generally consisted of the on-site glacial till and advance outwash soils. We evaluated the compaction of fill by observing placement procedures, by perfortning in-place density tests and 6y probing with a %,-inch diameter probe rod. Fill was generally compacted to at least 95 percent of the MDD in areas beneath Building Nos. 10 and I S during the mass grading period. Bazed on our observations and evaluations, it is our opinion that the fill placed within the footprint of Building Nos. 10 and 15 during the mass grading period were compacted in general accordance with our recommendations and the project plans and specifications. SOIL BEARING VERIFICATION Bullding Nos. 10, 12 through 15 We evaluated the footing subgrade soils at Duilding Nos. 10 and 12 through 15 and verified soil bearing on 12 occasions between September 6, 2005 and May 10, 2006 (refer to field report Nos. 57, 58, 67, 76, I 12, I 14, 1 I5, 125, 126, 136, 139 and 140). We also evaluated the backfill placed to support the upper building slab for building Nos 10 and 12 through IS on 13 occasions between November 18, 2005 and April 27, 2006 (refer to field report Nos. 93 through 97, 101, Ip2, 127, 129, 130, 132, 133, and 137). Based on our evaluation,the footing subgrade soils were firtn and the backfill placed are compacted to at least 95 peroent of MDD. Based on our observations, it is our opinion that soil bearing pressure of 2,500 psf was achieved in the footing subgrade of Building Nos. 10 and 12 through I S and the slab subgrade was prepared in general accordance with our recommendations and the project plans and specifications. We trust Ihis Ietter meets your current needs and provides the necessary information for the certificate of occupancy for Building Nos. 10 and 12 through I5. Please call if you have any questions or when we may be of further service. 2/ !S Fa�No. 7630-OOa-03 GEOENGINEERS�