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TRENCH GRIT SAMPLE RESULTS - 03 <br /> Collected date/time: 09/05/25 08:00 L1895744 <br /> Preparation by Method 22CCRA2 <br /> Result Qualifier RDL Dilution Analysis Batch FP1 <br /> Analyte date/time <br /> FTC]STLC Extraction - 1 09/07/2025 02:22 WG2595690 <br /> Final pH 5.31 1 09/07/2025 02:22 WG2595690 <br /> Mercury by Method 7470A FSS <br /> Result Qualifier RDL Dilution Analysis Batch FCn] <br /> Analyte mg/I mg/I date/time <br /> Mercury ND 0.00200 10 09/10/202514:51 WG2597103 <br /> Metals (ICP) by Method 6010D <br /> FQCIResult Qualifier RDL Dilution Analysis Batch <br /> Analyte mg/I mg/I date/time <br /> Antimony 0.0903 B 0.0900 9 09/11/202515:45 WG2597751 7GI <br /> Arsenic ND 0.0900 9 09/11/202515:45 WG2597751 <br /> Barium 1.58 0.0450 9 09/11/202515:45 WG2597751 <br /> Beryllium ND 0.0180 9 09/11/202515:45 WG2597751 JAI <br /> Cadmium ND 0.0180 9 09/11/202515:45 WG2597751 <br /> Chromium 0.256 0.0900 9 09/11/202515:45 WG2597751 Fq <br /> Cobalt ND 0.0900 9 09/11/202515:45 WG2597751 <br /> Copper ND 0.0900 9 09/11/202515:45 WG2597751 <br /> Lead 0.158 0.0540 9 09/11/202515:45 WG2597751 <br /> Molybdenum 0.0697 0.0450 9 09/11/202515:45 WG2597751 <br /> Nickel 0.332 0.0900 9 09/11/202515:45 WG2597751 <br /> Selenium ND 0.0900 9 09/11/202515:45 WG2597751 <br /> Silver ND 0.0450 9 09/11/202515:45 WG2597751 <br /> Thallium ND 0.0900 9 09111/202515:45 WG2597751 <br /> Vanadium ND 0.180 9 09/11/202515:45 WG2597751 <br /> Zinc 12.6 0.450 9 09/11/202515:45 WG2597751 <br /> ACCOUNT: PROJECT: S DG: DATE/TIME: PAGE: <br /> UniFirst Corporation-Wilmington,MA UNIFIRST 370-CA L1895744 09/23/25 10:17 12 of 53 <br />