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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 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 Result <br />Reporting <br />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 />Blank (2108763-BLKI) Prepared & Analyzed: 10/19/21 <br />Naphthalene ND 5.0 gg/kg <br />Benzene ND 5.0 <br />Toluene ND 5.0 <br />Ethylbenzene ND 5.0 <br />Xylenes (total) ND 10 <br />Di-isopropyl ether ND 5.0 <br />Ethyl tert-butyl ether ND 5.0 <br />Methyl tert-butyl ether ND 5.0 <br />tert-Amyl methyl ether ND 5.0 <br />tert-Butyl alcohol ND 50 <br />1,2-Dichloroethane ND 5.0 <br />1,2-Dibromoethane (EDB) ND 5.0 <br />Surrogate: 1,2-Dichloroethane-d4 36.1 30.0 120 50-125 <br />Surrogate: Toluene-d8 27.9 30.0 93 62-125 <br />Surrogate: 4-Bromofluorobenzene 29.6 30.0 99 50-128 <br />LCS (2108763-BS1) Prepared & Analyzed: 10/19/21 <br />Benzene 20.4 5.0 gg/kg 20.0 102 64-135 <br />Toluene 20.7 5.0 20.0 104 61-138 <br />Surrogate: 1,2-Dichloroethane-d4 33.6 30.0 112 50-125 <br />Surrogate: Toluene-d8 32.0 30.0 107 62-125 <br />Surrogate: 4-Bromofluorobenzene 28.3 It 30.0 94 50-128 <br />LCS Dup (2108763-BSDI) Prepared & Analyzed: 10/19/21 <br />Benzene 21.2 5.0 gg/kg 20.0 106 64-135 4 30 <br />Toluene 21.3 5.0 20.0 106 61-138 3 30 <br />Surrogate: 1,2-Dichloroethane-d4 33.6 30.0 112 50-125 <br />Surrogate: Toluene-d8 32.2 30.0 107 62-125 <br />Surrogate: 4-Bromofluorobenzene 29.0 30.0 97 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