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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: 2606A69 <br /> Date Prepared: 06/17/2026 BatchID: 343989 <br /> Date Analyzed: 06/17/2026 Extraction Method: SW3050 B <br /> Instrument: ICP-MS6 Analytical Method: SW6020B <br /> Matrix: Soil Unit: mg/kg <br /> Project: 6060161-01;Central Valley Compost(WM-Lathrop) Sample ID: MB/LCS/LCSD-343989 <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 2.04,J 1.80 5.00 - - - <br /> Surrogate Recovery <br /> Terbium 498 500 99 70-130 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Arsenic 49.5 51.4 50 99 103 75-125 3.88 20 <br /> Cadmium 48.9 50.7 50 98 101 75-125 3.59 20 <br /> Chromium 50.0 52.1 50 100 104 75-125 4.09 20 <br /> Copper 50.6 52.3 50 101 105 75-125 3.23 20 <br /> Lead 49.4 51.0 50 99 102 75-125 3.29 20 <br /> Mercury 1.20 1.25 1.25 96 100 75-125 4.00 20 <br /> Molybdenum 48.6 50.1 50 97 100 75-125 3.03 20 <br /> Nickel 50.0 52.6 50 100 105 75-125 5.01 20 <br /> Selenium 49.7 52.2 50 99 104 75-125 4.93 20 <br /> Zinc 505 522 500 101 104 75-125 3.24 20 <br /> Surrogate Recovery <br /> Terbium 496 508 500 99 102 70-130 2.40 20 <br /> CA ELAP 1644 •ORELAP(NELAP)4033 <br /> Page 5 of 11 <br />