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Michael Astrof <br /> From: dbrucepe@comcast.net <br /> Sent: Thursday, January 10, 2013 6:20 PM <br /> To: Michael Astrof <br /> Subject: Geotechnical Evalua!fon 6027 Glenwood Ave duplex <br /> City of Everett <br /> c/o Mike Astrof <br /> S7�d"�' <br /> 6027 Glenwood Ave. � <br /> # c �2os-o�a g y� � � <br /> This Engineer performed an onsite geotechnical evaluation Jan. 10, 2013 regarding foundation <br /> subgrade. I understand that the City of Everett has concerns . <br /> The site had been excavated, and formwork with rebar had been placed. <br /> The soil subgrade consists of dense, native slightly silty Sands with gravels. This soil easily provides <br /> 3,OOOp.s.f. bearing capacity. <br /> However, several specific locations ( within the formwork) contained "mushy" zones -due to <br /> oversaturation of the soil by recent rains. <br /> I recommend the following, before I can approve placing concrete: <br /> -As discussed onsite, hand dig, or "scoop" out the "mushy" soils to result in firm native subgrade. <br /> -Use crushed rock, properly tamped - such that no "spongy spots" are evident to this Engineer. <br /> -I understand that some pumping of ponded rainwater may be required - in order to result in a clean, <br /> dense subgrade under the concrete. <br /> -Use a 6 sack ( minimum) concrete mix in order to provide a "better than average" quality foundation. <br /> -Note that overnight temperatures are predicted to be below freezing - hence, protection of the <br /> concrete will be required. <br /> -I understand that concrete is planned for Monday Jan. 14, 2013 afternoon. <br /> -I will reinspect the above work Monday - and verify that I am satisfied with the entire subgrade - <br /> before "signing ofP' regarding concrete placement. <br /> - If subgrade conditions meet my recommendations, I will write an approval letter with my Engineering <br /> Stamp at the Monday time of placing concret2. <br /> Please forward this inspection report to the appropriate City of Everett inspector. Have him call me if <br /> he has any questions, or comments. <br />