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OTTO ROSENAU & ASSOCIATES, INC. Geotechnical Engineering, Construction Inspection & Materials Testing CONCRETE REPORT Job Number: 22-0835 Report Number: RC448519 Permit Number: B2208-t98.1 09 Project: Middle Earth Holdings Foundation Client: Helion Energy, Inc. Address: 1313 75th Street SW, Everett Date: 12/15/2022 Inspector(s): John Fraser Description/Location: Project Rat Slab on Grade Rebar Verified: Yes Mfg: Placement Data Design 0 Actual ❑ Batch Weights/Cubic Yard Supplier: Cadman Cement(lbs/type): 515# Type: PLC Mix Number: P5C44436 Fine Agg. (lbs): 1276# Slump Spec: 6"±1" Coarse Agg. (lbs/size): 1614##57 Slag (lbs): W/C Ratio Spec: 0.43 Coarse Agg. (lbs/size): 294##8 Air Spec: NA Coarse Agg. (lbs/size): Total Yards: 26 Fly Ash (lbs): 85# Placed Via: Boom Pump Water(Ibs or gal): 265# Consolidated: Yes Admixtures (specify): 7 oz. GLENIUM 7500,6 oz. POZZOLITH 80 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: 1-4 3:15 pm 10.00 13 gal. 5.25' NA% 59°F 53°F 507 1345231 Weather: Inside Slump Range: 5"-7" Air% Range: NA Date Samples Picked Up: 12/16/2022 Initial Curing Method: ASTM c31,Exclude c31-12.1.5 Initial Curing Tmp: ASTM c31,Exclude c31-10.12 Comments Placed per ACI criteria REINFORCING/PLACEMENT: Conforms:W Does Not Conform: ❑ COMPRESSIVE TEST RESULTS Fracture Type Specimen Test Field Age Size Daily Average Weight Max Load Strength (other Number Date Cure (Days) (in.) Area (Sq.In.) Diam. (In.) (Lbs.) (Lbs.) (psi) than cone) 1 12/22/2022 7 4 x 8 12.57 4.00 8.7 61,580 4900 5 2 01/12/2023 28 4 x 8 12.57 4.00 8.7 89,630 7130 5 3 01/12/2023 28 4 x 8 12.57 4.00 8.8 89,520 7120 5 4 01/12/2023 28 4 x 8 12.57 4.00 8.7 86,580 6890 5 28-day Average PSI: 7050 *=Discarded Tested in general accordance to: ASTMC39 ❑./ ASTMC617 ❑ ASTMC1231 ❑ Copies to: Date: 2023.01 .19 ❑ Client ❑d Engineer WOthers ��tc cw 05:41 :41 -08'00' ❑d Owner ❑d Contractor Technical Responsibility: ❑ Architect ❑./ 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-62-04 (Rev 09/06) Page 1 of 1