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CALIFORNIA LABORATORY SERVICES <br /> Committed. Responsive. Flexible. <br /> Page 17 of 20 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 /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2105984-EPA 3050B <br /> Blank(2105984-BLK1) Prepared&Analyzed:07/21/21 <br /> Arsenic ND 2.0 mg/kg <br /> LCS(2105984-BS1) Prepared&Analyzed:07/21/21 <br /> Arsenic 83.7 2.0 mg/kg 100 84 75-125 <br /> Matrix Spike(2105984-MS1) Source:21G1148-03 Prepared&Analyzed:07/21/21 <br /> Arsenic 58.4 2.0 mg/kg 100 3.29 55 75-125 QM-5 <br /> Matrix Spike Dup(2105984-MSD1) Source:21G1148-03 Prepared&Analyzed:07/21/21 <br /> Arsenic 61.9 2.0 mg/kg 100 3.29 59 75-125 6 30 QM-5 <br /> Batch 2106070-EPA 3050B <br /> Blank(2106070-BLK1) Prepared&Analyzed:07/23/21 <br /> Arsenic ND 2.0 mg/kg <br /> LCS(2106070-BSI) Prepared&Analyzed:07/23/21 <br /> Arsenic 107 2.0 mg/kg 100 107 75-125 <br /> Matrix Spike(2106070-MS1) Source:21G1148-29 Prepared&Analyzed:07/23/21 <br /> Arsenic 97.5 2.0 mg/kg 100 ND 97 75-125 <br /> Matrix Spike Dup(2106070-MSD1) Source:21G1148-29 Prepared&Analyzed:07/23/21 <br /> Arsenic 97.7 2.0 mg/kg 100 ND 98 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 1 CA SWRCB ELAP Accreditation/Registration Number 1233 <br />