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OTTO ROSENAU & ASSOCIATES, INC. <br />Geotechnical Engineering, Construction Inspection & Materials Testing <br />CONCRETE REPORT <br />Job Number: 23-0102 Report Number: RC453065 Permit Number: B2204-072 <br />Project: Helion Energy Control Room Client: Helion Energy, Inc. <br />Address: 1415 75th St SW, Everett Date: 02/24/2023 <br />Inspector(s): Paul Kanikkeberg <br />Description/Location: Slab on grade infill between gridline 5.1 and gridline 6.1. Verified reinforcing steel clearances from subgrade and <br />in between mats. <br />Rebar Verified: Yes 2/24/2023 Paul Kanikkeberg (Grade 60) Mfg: Cascade <br />Placement Data <br />Supplier: <br />Stanwood Redi-Mix <br />Mix Number: <br />55420C <br />Slump Spec: <br />5" Max <br />W/C Ratio Spec: <br />0.44 <br />Air Spec: <br />N/A <br />Total Yards: <br />6 <br />Placed Via: <br />Wheelbarrow <br />Consolidated: <br />Yes <br />Required Strength: <br />4000 psi @ 28 days <br />Design 0 <br />Actual ❑ Batch Weights/Cubic Yard <br />Cement (Ibs/type): <br />439# Type: t/tt <br />Fine Agg. (Ibs): <br />1532# <br />Coarse Agg. (Ibs/size): <br />1732# 3/4" Slag (Ibs): 75# <br />Coarse Agg. (Ibs/size): <br />198# 3/8" <br />Coarse Agg. (Ibs/size): <br />Fly Ash (Ibs): <br />Water (Ibs or gal): <br />13.2Gal <br />Admixtures (specify): <br />66 oz. GLENIUM 7500, 15.7 oz. POZZOLITH 80 <br />Sampling and Testing Data <br />Time <br />Cubic <br />Water <br />Slump <br />Air % <br />Conc.Temp <br />Ambient <br />Truck <br />Ticket <br />ASTM C 172, C 31 <br />Made <br />Yards <br />Added <br />C 143 <br />C 231 <br />C 1064 <br />Temp <br />No. <br />No. <br />Cast Samples: 1-4 <br />10:30 am <br />6.00 <br />10 gal. <br />5" <br />N/A <br />51 °F <br />60°F <br />209 <br />210701 <br />Weather: Inside Slump Range: 4 1/2" - 5" Air % Range: N/A <br />Date Samples Picked Up: 2/27/2023 Initial Curing Method: ASTM c31, Exclude c31-12.1.5 Initial Curing Tmp: ASTM c31, Exclude c31-10.1.2 <br />Comments <br />REINFORCING/PLACEMENT: Conforms: E Does Not Conform: ❑ <br />COMPRESSIVE TEST RESULTS Fracture Type <br />Specimen Test Field Age Size Daily Average Weight Max Load Strength (other <br />Number Date Cure (Days) (in.) Area (Sq.ln.) Diam. (In.) (Lbs.) (Lbs.) (psi) than cone) <br />1 03/03/2023 7 4 x 8 12.62 4.01 8.7 38,960 3090 5 <br />= Discarded <br />Tested in general accordance to: ASTMC39 ❑d ASTMC617 ❑ ASTMC1231 ❑ <br />Copies to: Date: 2023.03.07 <br />❑,e Client ❑d Engineer ❑ Others (J� � C <br />❑d Owner ❑d Contractor Technical Responsibility: 05:27: 6 '08�00� <br />❑ Architect ❑� Building Dept Isaac Ruoff, Project Manager <br />This report applies only to the items tested or reported and is the exclusive property of Otto Rosenau & Associates, Inc. Reproduction of this <br />report except in full, without written permission from our firm is strictly prohibited. <br />6747 M.L. King Way S., Seattle, Washington 98118 - Phone (206) 725-4600 - Fax (206) 723-2221 <br />Form No.: ADMIN-62-04 (Rev 09/06) Page 1 of 1 <br />