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OTTO ROSENAU & ASSOCIATES, INC. Geotechnical Engineering, Construction Inspection & Materials Testing CONCRETE REPORT Job Number: 22-0835b Report Number: RC452781 Permit Number: B2208-109 Project: Middle Earth Holdings Foundation-Phase 2 Client: Helion Energy, Inc. Address: 1313 75th St SW, Everett Date: 02/22/2023 Inspector(s): John Fraser Description/Location: Project Foundation slab. Concrete delivered and tested as delivered from mixing plant per contractor request Ref: ORA report#452780. **Per project design requirements, Boron Carbide powder w/Glenium added to specified concrete loads ***See notes for admixture details Rebar Verified: Yes 2/22/2023 John Fraser(Grade 60) Mfg: Cascade Placement Data Design Actual ❑ Batch Weights/Cubic Yard Supplier: Cadman Cement(lbs/type): 465# Type: PLC Mix Number: PPECC51K Fine Agg. (lbs): 1482# Slump Spec: 29"±3" Coarse Agg. (lbs/size): 1388##8 Slag (lbs): W/C Ratio Spec: .381 Coarse Agg. (lbs/size): Air Spec: n/a Coarse Agg. (lbs/size): Total Yards: 480 Fly Ash (lbs): 310# Placed Via: Tailgate Water(Ibs or gal): 35 gal. Consolidated: No Admixtures (specify): 45 oz.GLENIUM 7500, 16 oz.VMA 358 Required Strength: 5000 psi @ 28 days Sampling and Testing Data Time Cubic Water Slump Air% Conc.Temp Ambient Truck Ticket ASTM C 172, C 31 Made Yards Added C 143 C 231 C 1064 Temp No. No. Cast Samples: 1-7 4:15 am 9.00 10 gal. 32" n/a 60°F 33°F 507 1361168 Cast Samples: 8-11 5:00 am 80.00 5 gal. 29" n/a 59°F 33°F 347 1361174 Cast Samples: 12-15 7:00 am 150.00 5 gal. 28.25" n/a 58°F 34°F 506 1361185 Cast Samples: 16-19 9:00 am 225.00 0 gal. 27.5" n/a 58°F 33°F 366 1361215 Cast Samples: 20-23 11:00 am 300.00 0 gal. 27.25" n/a 59°F 35°F 507 1361275 Cast Samples: 24-27 11:45 am 400.00 0 gal. 28.75" n/a 55°F 35°F 366 1361298 Cast Samples: 28-31 1:00 pm 480.00 0 gal. 27.5" n/a 57°F 36°F 430 1361314 Weather: Inside Slump Range: n/a Air% Range: n/a Date Samples Picked Up: 2/23/2023 Initial Curing Method: ASTM c31,Exclude c31-12.1.5 Initial Curing Tmp: ASTM c31,Exclude c31-10.1.2 Comments The samples represented in this report reflect the concrete mix after Boron Carbide(BC)was added prior to placement in the structural slab. -Per EOR direction, (20) bags of BC were added to each mixer as they arrived for delivery *The 5th and 4th from last mixers had only(10)bags each added, as the supply of BC had run low **The 3rd. 2nd from last and the last mixer had no BC added, as the supply had run out. EOR was aware and approved placement of all noted concrete mix REINFORCING/PLACEMENT: Conforms:❑� Does Not Conform: ❑ See attached for additional test results Copies to: �/ �� Date: 2023.03.09 ❑ Client ❑d Engineer WOthers sm" 13:24:40 _08'00' ❑d Owner ❑d Contractor Technical Responsibility: ❑ Architect ❑d Building Dept Isaac Ruoff, Project Manager This report applies only to the items tested or reported and is the exclusive property of Otto Rosenau&Associates, Inc. Reproduction of this report except in full,without written permission from our firm is strictly prohibited. 6747 M.L. King Way S.,Seattle,Washington 98118-Phone(206)725-4600-Fax(206)723-2221 Form No.:ADMIN-62c-04 (Rev 09/06) Page 1 of 2