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CALIFORNIA LABORATORY SERVICES <br /> Committed. Responsive. Flexible. <br /> Page 19 of 22 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 />