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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccarnpbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Soil Control Lab WorkOrder: 2507322 <br /> Date Prepared: 07/08/2025 BatchID: 320794 <br /> Date Analyzed: 07/09/2025 Extraction Method: SW3050 B <br /> Instrument: ICP-MS4 Analytical Method: SW6020 <br /> Matrix: Soil Unit: mg/kg <br /> Project: 5060352-01;Central Valley Compost(WM- Sample ID: MB/LCS/LCSD-320794 <br /> Lathrop)(Altamont) <br /> QC Summary Report for Metals <br /> Analyte MB MDL RL SPK MB IS/SS MB IS/SS <br /> Result Val %REC Limits <br /> Arsenic ND 0.10 0.50 - <br /> Cadmium ND 0.073 0.50 - <br /> Chromium ND 0.14 0.50 - <br /> Copper ND 0.15 0.50 - <br /> Lead ND 0.11 0.50 - <br /> Mercury ND 0.040 0.050 - <br /> Molybdenum ND 0.089 0.50 - <br /> Nickel ND 0.25 0.50 - <br /> Selenium ND 0.20 0.50 - <br /> Zinc ND 1.5 5.0 - - - <br /> Surrogate Recovery <br /> Terbium 510 500 102 70-130 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Arsenic 49 49 50 98 99 75-125 0.503 20 <br /> Cadmium 50 49 50 100 98 75-125 1.90 20 <br /> Chromium 51 50 50 101 100 75-125 0.994 20 <br /> Copper 50 50 50 101 100 75-125 0.185 20 <br /> Lead 49 48 50 97 97 75-125 0.571 20 <br /> Mercury 1.2 1.2 1.25 98 99 75-125 1.62 20 <br /> Molybdenum 50 50 50 101 99 75-125 1.52 20 <br /> Nickel 50 51 50 101 101 75-125 0.429 20 <br /> Selenium 50 51 50 99 101 75-125 1.64 20 <br /> Zinc 500 510 500 101 101 75-125 0.0553 20 <br /> Surrogate Recovery <br /> Terbium 510 510 500 102 101 70-130 1.13 20 <br /> CA ELAP 1644 •ORELAP(NELAP)4033 <br /> Page 5 of 10 <br />