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f* McCampbell Analytical, Inc. <br />"When Quality Counts" <br />1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.mccampbell.com / E-mail: main@mccampbell.com <br /> <br />Quality Control Report <br />Client: Atlas Technical Consultants <br />Date Prepared: 02/18/2021 <br />Date Analyzed: 02/19/2021 <br />Instrument: ICP-MS5 <br />Matrix: Soil <br />Project: 91-57962-PW; FUHSD <br />WorkOrder: 2102A42 <br />BatchID: 215590 <br />Extraction Method: SW3050B <br />Analytical Method: SW6020 <br />Unit: mg/kg <br />Sample ID: MB/LCS/LCSD-215590 <br />QC Summary Report for Metals <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />%REC <br />LCSD <br />%REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />Antimony 50.2 48.9 50 100 98 75-125 2.63 20 <br />Arsenic 54.3 53.3 50 109 107 75-125 1.85 20 <br />Barium 501 499 500 100 100 75-125 0.465 20 <br />Beryllium 48.5 47.5 50 97 95 75-125 2.13 20 <br />Cadmium 51.3 49.9 50 103 100 75-125 2.74 20 <br />Chromium 50.9 49.4 50 102 99 75-125 2.88 20 <br />Cobalt 50.2 48.9 50 100 98 75-125 2.69 20 <br />Copper 51.5 52.0 50 103 104 75-125 0.958 20 <br />Lead 51.4 50.7 50 103 101 75-125 1.25 20 <br />Mercury 1.24 1.24 1.25 99 100 75-125 0.483 20 <br />Molybdenum 51.1 50.1 50 102 100 75-125 2.10 20 <br />Nickel 53.0 52.4 50 106 105 75-125 1.14 20 <br />Selenium 52.9 51.5 50 106 103 75-125 2.78 20 <br />Silver 50.7 49.8 50 101 100 75-125 1.84 20 <br />Thallium 50.2 50.0 50 100 100 75-125 0.310 20 <br />Vanadium 51.8 49.2 50 104 98 75-125 5.14 20 <br />Zinc 532 521 500 107 104 75-125 2.17 20 <br />Surrogate Recovery <br />Terbium 514 523 500 103 105 70-130 1.85 20 <br />CA ELM 1644 • NELAP 40330RELAP <br />Page 58 of 68