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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> _ M c C a m p b e I I Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Soil Control Lab WorkOrder: 2606935 <br /> Date Prepared: 06/16/2026 BatchID: 343916 <br /> Date Analyzed: 06/16/2026 Extraction Method: SW3050 B <br /> Instrument: ICP-MS5 Analytical Method: SW6020B <br /> Matrix: Soil Unit: mg/kg <br /> Project: 6060062-01;Earthcare of Marin(RWO 25053) Sample ID: MB/LCS/LCSD-343916 <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 0.100 0.500 - - - <br /> Cadmium ND 0.0630 0.500 - - - <br /> Chromium ND 0.110 0.500 - - - <br /> Copper ND 0.150 0.500 - - - <br /> Lead ND 0.110 0.500 - - - <br /> Mercury ND 0.0410 0.0500 - - - <br /> Molybdenum ND 0.110 0.500 - - - <br /> Nickel ND 0.160 0.500 - - - <br /> Selenium ND 0.160 0.500 - - - <br /> Zinc ND 1.80 5.00 - - - <br /> Surrogate Recovery <br /> Terbium 493 500 99 70-130 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Arsenic 48.3 50.8 50 97 102 75-125 5.13 20 <br /> Cadmium 47.8 50.2 50 96 100 75-125 4.84 20 <br /> Chromium 49.7 50.5 50 99 101 75-125 1.72 20 <br /> Copper 48.3 50.8 50 97 102 75-125 4.97 20 <br /> Lead 48.8 50.4 50 98 101 75-125 3.19 20 <br /> Mercury 1.20 1.23 1.25 96 99 75-125 3.13 20 <br /> Molybdenum 46.5 49.4 50 93 99 75-125 6.13 20 <br /> Nickel 48.3 50.8 50 97 102 75-125 5.12 20 <br /> Selenium 49.3 51.2 50 99 102 75-125 3.74 20 <br /> Zinc 484 506 500 97 101 75-125 4.37 20 <br /> Surrogate Recovery <br /> Terbium 488 504 500 98 101 70-130 3.23 20 <br /> CA ELAP 1644•ORELAP(NELAP)4033 <br /> Page 5 of 11 <br />