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CALIFORNIA LABORATORY SERVICES <br />Committed. Responsive. Flexible. <br />'age 17 of 20 %.P 07/23/21 14:52 <br />Wallace Kuhl & Associates- West Sacramento Project: Westlake Villages E, G, H, I, J <br />3050 Industrial Boulevard Project Number: 13221.02 CLS Work Order #: 21G1148 <br />West Sacramento, CA 95691 Project Manager: Dennis Nakamoto COC #: <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Reporting Spike Source %REC RPD <br />nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 2105984 - EPA 3050B <br />Blank (2105984-BLK1) <br />Prepared & Analyzed: 07/21/21 <br />Arsenic <br />LCS (2105984-BS1) <br />ND 2.0 mg/kg <br />Prepared & Analyzed: 07/21/21 <br />Arsenic <br />Matrix Spike (2105984-MS1) <br />83.7 2.0 mg/kg <br />Source: 21G1148-03 <br />100 84 <br />Prepared & Analyzed: 07/21/21 <br />75-125 <br />Arsenic <br />Matrix Spike Dup (2105984-MSD1) <br />58.4 2.0 mg/kg <br />Source: 21G1148-03 <br />100 3.29 55 <br />Prepared & Analyzed: 07/21/21 <br />75-125 QM -5 <br />Arsenic <br />Batch 2106070 - EPA 3050B <br />61.9 2.0 mg/kg <br />100 3.29 59 <br />75-125 6 30 QM -5 <br />Blank (2106070-BLK1) <br />Prepared & Analyzed: 07/23/21 <br />Arsenic <br />LCS (2106070 -BSI) <br />ND 2.0 mg/kg <br />Prepared & Analyzed: 07/23/21 <br />Arsenic <br />Matrix Spike (2106070-MS1) <br />107 2.0 mg/kg <br />Source: 21G1148-29 <br />100 107 <br />Prepared & Analyzed: 07/23/21 <br />75-125 <br />Arsenic <br />Matrix Spike Dup (2106070-MSD1) <br />97.5 2.0 mg/kg <br />Source: 21G1148-29 <br />100 ND 97 <br />Prepared & Analyzed: 07/23/21 <br />75-125 <br />Arsenic <br />97.7 2.0 mg/kg <br />100 ND 98 <br />75-125 0.3 30 <br />3249 Fitzgerald Road, Rancho Cordova, CA 95742 1 800.638.7301 1 Tel: 916.638.7301 x102 1 Fax: 916.638.4510 1 www.californialob.com <br />Small Business #2916 1 ELAP #1233 1 NAICS #541380 ICA SWRCB ELAP Accreditation/Registration Number 1233 <br />