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SUBGRADE OBSERVATION REPORT rerracon <br /> Report Number: 81231004.0001 <br /> Service Date: 08/16/23 21905 64th Ave W, Ste 100 <br /> Report Date: 08/25/23 Mountlake Terrace, WA 98043-2251 <br /> 425-771-3304 <br /> Client Project <br /> The Boeing Company Blg 40-31 PRIT PRAT <br /> Attn: David Duffy 3003 W Casino Road <br /> 3003 W Casino Rd Everett, WA <br /> Everett, WA 98204-1910 <br /> Project Number: 81231004 <br /> Permit Number: B2305-038 <br /> Time Onsite: 7:30 - 11:00 <br /> Attachments: Photo Log and Block Diagram <br /> General Information <br /> A Terracon representative visited the site at the request of The Boeing Company to observe the subgrade for a pad foundation. WA Patriot <br /> Construction performed the earthwork activities. <br /> The construction documents referenced for this inspection include: Prit/Prat 40-05 Transformation Project Building 40-031 Sheet G2z <br /> Subgrade Observation <br /> We observed that the exposed subgrade for the pad foundation at building 40-031 consisted of a silty sand with trace gravel (glacial till). Field <br /> observations were performed with a 1/2-inch T-probe advanced manually until refusal ranging from 0 to 1 inch. Probing was performed on prepared <br /> subgrade in regular intervals for the full area of the observed location. Any soils which appeared as fill or unsuitable for the foundation loadings <br /> were removed until suitable soils were found. The subgrade present was firm and non-yielding and appeared to be suitable for the foundation <br /> loading. <br /> Compliance Statement <br /> Based on our observations and/or tests fill placement activities as detailed above appear to be completed in general accordance with the project <br /> plans and specifications. <br /> Services: <br /> Terracon Rep.: Mason Millard <br /> Reported To: <br /> Contractor: <br /> Report Distribution: <br /> (1)The Boeing Company,David Duffy (1)Washington Patriot Construction, <br /> Kristin Bonney <br /> (1)Washington Patriot Construction, Reviewed By: <br /> Mirhael Vnse <br /> 3arom Gray <br /> Group Manager <br /> The tests were performed in general accordance with applicable ASTM,AASHTO,or DOT test methods. This report is exclusively for the use of the client indicated above <br /> and shall not be reproduced except in full without the written consent of our company. Test results transmitted herein are only applicable to the actual samples tested at <br /> the location(s)referenced and are not necessarily indicative of the properties of other apparently similar or identical materials. <br /> D11010,04-29-22 Rev.3 Page 1 of 1 <br />