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CALIFORNIA LABORATORY SERVICES <br /> <br />Committed. Responsive. Flexible. <br /> <br />10/20/21 15:04 <br />APEX Envirotech Inc. - Gold River Project: Waterloo Food and Fuel <br />11291 Pyrites Wy. Suite B <br /> Project Number: WFF52.001 <br /> CLS Work Order #: 21J0672 <br />Gold River, CA 95670 <br /> Project Manager: Bryan Yates COC #: <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte <br />Reporting <br />Result Limit Units <br />Spike Source <br />Level Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch 2108763 - EPA 5030 Soil MS <br />Matrix Spike (2108763-MS1) Source: 21J0672-01 Prepared & Analyzed: 10/19/21 <br />Benzene <br />Toluene <br /> <br />22.6 5.0 <br /> <br />22.9 5.0 <br />µg/kg <br />le <br /> <br />20.0 ND 113 <br /> <br />20.0 ND 115 <br />58-139 <br />58-139 <br />Surrogate: 1,2-Dichloroethane-d4 34.7 30.0 116 50-125 <br />Surrogate: Toluene-d8 34.5 30.0 115 62-125 <br />Surrogate: 4-Brornofluoroben2ene 24.8 11 30.0 83 50-128 <br />Matrix Spike Dup (2108763-MSD1) Source: 21J0672-01 Prepared & Analyzed: 10/19/21 <br />Benzene 22.5 5.0 µg/kg 20.0 ND 113 58-139 0.09 30 <br />Toluene 22.5 5.0 20.0 ND 113 58-139 2 30 <br />Surrogate: 1,2-Dichloroethane-d4 33.3 11 30.0 111 50-125 <br />Surrogate: Toluene-d8 33.4 30.0 111 62-125 <br />Surrogate: 4-Bromofluorobenzene 26.5 30.0 88 50-128 <br />3249 Fitzgerald Road, Rancho Cordova, CA 95742 I 800.638.7301 I Tel: 916.638.7301 x102 I Fax: 916.638.4510 I www.californialab.com <br />Small Business #2916 I ELAP #1233 I NAICS #541380 I CA SWRCB ELAP Accreditation/Registration Number 1233