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CALIFORNIA LABORATORY SERVICES <br /> <br />Committed. Responsive. Flexible. <br /> <br />09/27/21 14:52 <br />APEX Envirotech Inc. - Gold River Project: Waterloo Food and Fuel <br />11291 Pyrites Wy. Suite B <br /> Project Number: WFF02.001-QM <br /> <br />CLS Work Order #: 2110960 <br />Gold River, CA 95670 <br /> <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 2108025- EPA 5030 Water MS <br />Blank (2108025-BLK1) Prepared & Analyzed: 09/24/21 <br />Naphthalene ND 0.50 p.g/L <br />Benzene ND 0.50 <br />Toluene ND 0.50 <br />Ethylbenzene ND 0.50 <br />Xylenes (total) ND 1.0 <br />Di-isopropyl ether ND 0.50 <br />Ethyl tert-butyl ether ND 0.50 <br />Methyl tert-butyl ether ND 0.50 <br />tert-Amyl methyl ether ND 0.50 <br />tert-Butyl alcohol ND 5.0 <br />1,2-Dichloroethane ND 0.50 <br />I,2-Dibromoethane (EDB) ND 0.50 <br />Surrogate: 1,2-Dichloroethane-d4 11.9 10.0 119 66-135 <br />Surrogate: Toluene-d8 9.92 II 10.0 99 72-125 <br />Surrogate: 4-Bromofiuorobenzene 11.3 " 10.0 113 73-125 <br />LCS (2108025-BS1) Prepared & Analyzed: 09/24/21 <br />Benzene <br />Methyl tert-butyl ether <br />18.4 <br />19.5 <br />0.50 <br />0.50 <br />pg/L <br />i I <br /> <br />20.0 92 <br /> <br />20.0 98 <br />52-130 <br />52-130 <br />Surrogate: 1,2-Dichloroethane-d4 10.5 II 10.0 105 66-135 <br />Surrogate: Toluene-d8 10.0 II 10.0 100 72-125 <br />Surrogate: 4-Bromofluorobenzene 9.13 " 10.0 91 73-125 <br />LCS Dup (2108025-BSD1) Prepared & Analyzed: 09/24/21 <br />Benzene 18.2 0.50 p.g/L 20.0 91 52-130 1 30 <br />Methyl tert-butyl ether 19.1 0.50 20.0 95 52-130 2 30 <br />Surrogate: 1,2-Dichloroethane-d4 10.6 10.0 106 66-135 <br />Surrogate: Toluene-d8 9.97 10.0 100 72-125 <br />Surrogate: 4-Bromofluorobenzene 9.74 10.0 97 73-125 <br />3249 Fitzgerald Road, Rancho Cordova, CA 95742 1 800.638.7301 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