1401 MERRILL CREEK PKY #15 2016-01-01 MF Import

FF Deyelopment LP December I,2006 Page 2 repons hu been provided to you during construction and also has been forwarded to the on-site FF Development Construction ot7ice. FILL MATERUL EVALUATION AND REWIIRED COMPACTiON On-site soils werc used as fill and backfill at the site. We evaluated fill placement activities within the Pod 2 area where Building Nos. 10 and 15 are located during the mass grading period on 7 occasions bctween July 19, and July 28, 2005 (refer to field report Nos. 24 through 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 Society for Testing and Materials (ASTM) D1557 testing procedure. 7'he 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 perCortning in-place density tests and by probing with a %:-inch diameter probe rod. Fill was generally compacted to at least 95 percent of the MDD in areu beneath Building Nos. I O and I S during the mass grading period. Based on our obscrvations and evaluations, it is our opinion that the fill placed within the footprint of Building Nos. 10 and I S during the mass grading period were compacted in gene2l accordance with our recommendations and the project plans and specifications. SOIL BEARING VERIFICATION Buflding Nos. 10, 12 through 15 We evaluated the footing subgrade soils at Building Nos. 10 and 12 through IS 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 15 on 13 occasions between November 18, 2005 and April 27, 2006 (rcfer to field report Nos. 93 through 97, 101, 102, 127, 129, 130, 132, 133, and 137). Based on our evaluation,the footing subgrade soils werc firm and the backfill placed are compacted to at least 95 percent of MDD. Based on our nbservations, it is our opinion that soil bearing pressure of 2,500 psf was achieved in the footing subgrade of E3uilding Nos. 10 and 12 through 15 and the slab subgrade was prepared in general accordance with our rccommendations and the project plans and specitications. We lrust this lener meets your curt.:nt necds and provides the necessary infortnation for the certificate of occupancy for Duilding Nos. 10 a�id 12 through 15. Please call if you have any questions or when we may be of further service. � File,Yo. 76J0-l1(1a-03 r,7FOENGINEEIIS�