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May 09 13 11 : 06a p. 5 <br /> , i <br /> Test#2— Pool Base (At Deep Section Centerline) <br /> DCP Depth Per Blow Avg. / N-Va�ue Estimated Load <br /> 659 MM (25.9") 36.3 MM/ N—8.5 3125 PSF <br /> Test#3—Pool West End (Flat Zone) <br /> DCP Depth I'er Blow Avq. 1 N-Value Estimated Load <br /> 1000 MM (39.4") 69,2 MM / N —4.3 1458 PSF <br /> IVote: Although test#1 indicates generally acceptable capacity, it only represents the composite <br /> average of soil below 2 feet within the area tested. It should be noted that the first hammer drop or <br /> set blow, penetrated over 560 MM, or 22" of soil. This upper layer of very soft su►face soil may <br /> settle as construction loads are applieci. It is therefore recommended that the area represented by <br /> Test#1, be corrected to increase consolidation and load-bearing capacity of the soils. <br /> As recommended, the contractor completed the soil correction, and the soils were retested on <br /> May 7, 2013 as follows: <br /> Test#4—Soif Correction Zone Test (Reference Test#1) <br /> DCP Depth Per Blow Avq. / N-Va1ue Estimafed Load <br /> 894 MM (35.2") 53.2 MM/ N — 5.75 1917 PSF <br /> In our opinion, with the noted soil correction, the observed and tested sub-grade soils are <br /> acceptab{e, and would be expected to meet a target bearing capacity of 1200/13d0 PSF, for the <br /> proposed construction. Our observations and subsequent soil evaluation for the project is limited in <br /> scope to soil conditions observed within the pool excavation, and to the depths achieved by shallow <br /> probes and dynamic cone penetrometer tests. Therefore, we are unable to assess sub-grade soils <br /> at an elevation, which may be encountered by borings conducted as part of a standard subsurface <br /> geotechnical investigation. <br /> Sincerely, <br /> Itco Alfied Engineering Company Reviewed By: <br /> � z,�?�� ���G��y��'�ed� <br /> Gary Standish Gordon J. Kopacek, P.E. <br /> Senior{nspector Minnesota Reg. #7254 <br /> CC: City of Orono Suilding lnspections <br /> #701 - 1 / #605— 1 1/2 I#610—'/4 I#304/ (4) DCP/ #612—60 1/2 <br />