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WG2596573 QUALITY CONTROL SUMMARY <br /> Wet Chemistry by Method 9045D L1895603-02 <br /> L1895382-02 Original Sample (OS) • Duplicate (DUP) <br /> (OS)L1895382-02 09/09/25 23:10•(DUP)R4271086-3 09/09/25 23:10 C p <br /> Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD PC <br /> Limits <br /> Analyte su su % % <br /> pH 7.70 7.67 1 0.390 1 FS <br /> Sample Narrative: <br /> OS:7.7 at 20.4C 4 <br /> Cn <br /> DUP:7.67 at 20.3C <br /> Sr <br /> Laboratory Control Sample (LCS) I <br /> (LCS)R4271086-1 09/09/25 23:10 ® <br /> Spike Amount LCS Result LCS Rec. Rec.Limits LCS Qualifier <br /> Analyte su su % % G I <br /> pH 10.0 9.95 99.5 99.0-101 <br /> Sample Narrative: $AI <br /> LCS:9.95 at 20.6C <br /> Fc <br /> ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br /> UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895603 09/23/25 10:16 17 of 53 <br />