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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.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Kirkwood Meadows Public Untility District WorkOrder: 2604713 <br /> Date Prepared: 04/10/2026 BatchID: 339451 <br /> Date Analyzed: 04/13/2026 Extraction Method: SW3050 B <br /> Instrument: ICP-MS5 Analytical Method: SW6020B <br /> Matrix: Soil Unit: mg/kg <br /> Project: Kirkwood WWTP Sample ID: MB/LCS/LCSD-339451 <br /> QC Summary Report for Metals <br /> Analyte MB MDL RL SPK MB IS/SS MB IS/SS <br /> Result Val %REC Limits <br /> Antimony ND 0.0940 0.500 <br /> Arsenic ND 0.100 0.500 <br /> Barium ND 0.700 5.00 - <br /> Beryllium ND 0.0630 0.500 - <br /> Cadmium ND 0.0630 0.500 - <br /> Chromium ND 0.110 0.500 - <br /> Cobalt ND 0.0610 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 /> Silver ND 0.0620 0.500 - <br /> Thallium ND 0.0690 0.500 - - <br /> Vanadium ND 0.0920 0.500 - - <br /> Zinc ND 1.80 5.00 - - - <br /> Surrogate Recovery <br /> Terbium 584 500 117 70-130 <br /> (Cont.) <br /> CA ELAP 1644.ORELAP(NELAP)4033 <br /> Page 25 of 36 <br />