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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 CLS Work Order #: 2110960 <br />Gold River, CA 95670 <br /> Project Manager: Bryan Yates COC #: <br />Volatile Organic Compounds by EPA Method 8260B <br />Analyte <br />Reporting <br />Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />MW-3 (2110960-03) Water Sampled: 09/14/21 09:50 Received: 09/20/21 13:45 <br />Naphthalene ND 0.50 gg/L 1 2108023 09/22/21 09/22/21 EPA 8260B <br />Benzene 4.1 0.50 Is 11 <br />Toluene ND 0.50 /I /I <br />Ethylbenzene ND 0.50 <br />Xylenes (total) ND 1.0 <br />Di-isopropyl ether ND 0.50 <br />Ethyl tert-butyl ether 2.1 0.50 <br />Methyl tert-butyl ether 4.5 0.50 <br />tert-Amyl methyl ether ND 0.50 <br />tert-Butyl alcohol 450 5.0 <br />1,2-Dichloroethane ND 0.50 It <br />Surrogate: 1,2-Dichloroethane-d4 119 % 66-135 <br />Surrogate: Toluene-d8 100% 72-125 ff <br />Surrogate: 4-Bromofluorobenzene 108 % 73-125 <br />MW-4 (2110960-04) Water Sampled: 09/14/21 10:35 Received: 09/20/21 13:45 <br />Naphthalene ND 0.50 p.g/I., 1 2108023 09/22/21 09/22/21 EPA 8260B <br />Benzene 1.5 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 2.0 0.50 <br />Methyl tert-butyl ether 3.3 0.50 <br />tert-Amyl methyl ether ND 0.50 II II II II II II <br />tert-Butyl alcohol 940 5.0 <br />1,2-Dichloroethane ND 0.50 ,. . .. ,. <br />Surrogate: 1,2-Dichloroethane-d4 114% 66-135 <br />Surrogate: Toluene-d8 99% 72-125 <br />Surrogate: 4-Bromoiluorobenzene 109 % 73-125 <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.colifornialab.com <br />Small Business #2916 I ELAP #1233 I NAICS #541380 I CA SWRCB ELAP Accreditation/Registration Number 1233