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CALIFORNIA LABORATORY SERVICES <br /> Committed. Responsive. Flexible. <br /> Page 3 of 4 10/27/22 14:04 <br /> Premier Chemical Project: Chromium Treatment Tank Disposal <br /> P.O.Box 6148 Project Number: [none] CLS Work Order#:22J1151 <br /> Vacaville,CA 95696 Project Manager: Michael Montanus COC#:212162 <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 2209095-EPA 3050B <br /> Blank(2209095-BLK1) Prepared&Analyzed: 10/24/22 <br /> Chromium ND 0.50 mg/kg <br /> LCS(2209095-BS1) Prepared&Analyzed: 10/24/22 <br /> Chromium 52.8 0.50 mg/kg 50.0 106 75-125 <br /> Matrix Spike(2209095-MS1) Source:22JO948-01 Prepared&Analyzed: 10/24/22 <br /> Chromium 87.7 0.50 mg/kg 50.0 43.4 89 75-125 <br /> Matrix Spike Dup(2209095-MSD1) Source:22JO948-01 Prepared&Analyzed: 10/24/22 <br /> Chromium 89.2 0.50 mg/kg 50.0 43.4 92 75-125 2 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.californialab.com <br /> Small Business#2916 1 ELAP#1233 1 NAICS#541380 1 CA SWRCB ELAP Accreditation/Registration Number 1233 <br />