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CALIFORNIA LABORATORY SERVICES <br />Committed. Responsive. Flexible. <br />Page 19 of 22 %.P 07/21/21 15:23 <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 #: 21G1076 <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 />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 2105942 - EPA 3050B <br />Blank (2105942-BLK1) Prepared & Analyzed: 07/20/21 <br />Arsenic ND 2.0 mg/kg <br />LCS (2105942-BS1) Prepared & Analyzed: 07/20/21 <br />Arsenic 9.71 2.0 mg/kg 10.0 97 75-125 <br />Matrix Spike (2105942-MS1) Source: 21G1076-02 Prepared & Analyzed: 07/20/21 <br />Arsenic 7.64 2.0 mg/kg 10.0 ND 76 75-125 <br />Matrix Spike Dup (2105942-MSD1) Source: 21G1076-02 Prepared & Analyzed: 07/20/21 <br />Arsenic 7.58 2.0 mg/kg 10.0 ND 76 75-125 0.7 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 1 CA SWRCB ELAP Accreditation/Registration Number 1233 <br />