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Excelchem Laboratories, Inc. <br />Ancon Environmental <br /> Project: Stockton Diesel Spill <br />570 Business Park Dr. Project Number: 1043326 <br /> Date Reported: <br />Lincoln, CA 95678 Project Manager: Nolan Ryan 08/07/20 16:16 <br />Volatile Organic Compounds by GC/MS - Quality Control <br />Analyte Result Limit <br />Reporting <br />Units <br />Spike Source <br />Level Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch AAG-0200 - EPA 8260B <br />Matrix Spike (AAG0200-MS1) Source: 2007132-01 Prepared & Analyzed: 07/26/20 <br />Surrogate: Dibrornofluoromethane 34.0 ug/kg 50.0 68.0 70-130 S-GC <br />Surrogate: Toluene-d8 51.0 50.0 102 70-130 <br />Surrogate: 4-Bromofluorobenzene 53.1 50.0 106 70-130 <br />Benzene 0.02 0.005 mg/kg 0.0200 ND 80.5 80-120 <br />Toluene 0.02 0.005 0.0200 ND 79.5 80-120 QR-07 <br />1,1-Dichloroethene 0.02 0.005 0.0200 ND 87.4 80-120 <br />Chlorobenzene 0.02 0.005 0.0200 ND 78.8 80-120 QR-07 <br />Trichloroethene 0.03 0.005 0.0200 ND 142 80-120 QR-07 <br />Matrix Spike Dup (AAG0200-MSD1) Source: 2007132-01 Prepared & Analyzed: 07/26/20 <br />Surrogate: Dibromofluoromethane 32.0 ug/kg 50.0 63.9 70-130 S-GC <br />Surrogate: Toluene-d8 51.2 50.0 102 70-130 <br />Surrogate: 4-Bromofluorobenzene 53.0 50.0 106 70-130 <br />Benzene 0.02 0.005 mg/kg 0.0200 ND 95.5 80-120 17.1 15 QR-03 <br />Toluene 0.02 0.005 0.0200 ND 93.8 80-120 16.5 15 QR-03 <br />1,1-Dichloroethene 0.02 0.005 0.0200 ND 101 80-120 14.0 15 <br />Chlorobenzene 0.02 0.005 0.0200 ND 92.1 80-120 15.6 15 QR-03 <br />Trichlonaethene 0.03 0.005 II 0.0200 ND 167 80-120 16.3 15 QM-11 <br />Batch A AG0221 - EPA 8260B <br />Blank (A^G0221-BLK1) Prepared & Analyzed: 07/27/20 <br />Surrogate: Dibromofluoromethane 14.4 ugh 12.5 115 70-130 <br />Surrogate: Toluene-d8 13.2 12.5 106 70-130 <br />Surrogate: 4-Bromofluorobenzene 13.5 12.5 108 70-130 <br />Benzene ND 0.5 <br />Toluene ND 0.5 <br />Ethylbenzene ND 0.5 <br />m,p-Xylene ND 1.0 <br />o-Xylene ND 0.5 <br />Xylenes, total ND 1.0 <br />1,1-Dichloroethene ND 0.5 <br />Trichloroethene ND 0.5 <br />Chlorobenzene ND 0.5 <br />Naphthalene ND 0.5 <br />Excelchem Laboratories. Inc. The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br /> <br />Laboratory Representative Page 6 of 18