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Excelchem Laboratories, Inc. <br />Ancon Environmental <br /> <br />Project: Stockton Diesel Spill <br />570 Business Park Dr. Project Number: 1043326 <br /> <br />Date Reported: <br />Lincoln, CA 95678 <br /> <br />Project Manager: Nolan Ryan 08/0720 16:16 <br />Volatile Organic Compounds by GC/MS - Quality Control <br />Analyte Result <br />Re?ionirtpg <br />Units <br />Spike Source <br />Level Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch A" G0200 - EPA 8260B <br />Blank (A^G0200-BLK1) Prepared & Analyzed: 07/26/20 <br />Surrogate: Dibromofluoromethane 53.0 ug/kg 50.0 106 70-130 <br />Surrogate: Toluene-d8 51.3 50.0 103 70-130 <br />Surrogate: 4-Bromolluorobenzene 56.6 50.0 113 70-130 <br />Benzene ND 0.005 mg/kg <br />Toluene ND 0.005 <br />Ethylbenzene ND 0.005 <br />m,p-Xylene ND 0.01 <br />o-Xylene ND 0.005 <br />Xylenes, total ND 0.01 <br />LCS (AAG0200-BS1) Prepared & Analyzed 07/26/20 <br />Surrogate: Dibromofluoromethane 53.2 ug/kg 50.0 106 70-130 <br />Surrogate: Toluene-d8 51.6 50.0 103 70-130 <br />Surrogate: 4-Bromofluorobenzene 52.0 50.0 104 70-130 <br />Benzene 0.02 0.005 mg/kg 0.0200 88.5 80-120 <br />Toluene 0.02 0.005 0.0200 89.4 80-120 <br />1,1-Dichloroethene 0.02 0.005 ,. 0.0200 91.7 80-120 <br />Chlombenzene 0.02 0.005 0.0200 89.8 80-120 <br />Trichloroethene 0.02 0.005 " 0.0200 92.1 80-120 <br />LCS Dup (A"G0200-BSD1) Prepared & Analyzed: 07/26/20 <br />Surrogate: Dibromofluoromethane 52.9 ug/kg 50.0 106 70-130 <br />Surrogate: Toluene-c18 52.0 50.0 104 70-130 <br />Surrogate: 4-Bromofluorobenzene 55.9 50.0 112 70-130 <br />Benzene 0.02 0.005 mg/kg 0.0200 84.5 80-120 4.63 15 <br />Toluene 0.02 0.005 0.0200 84.9 80-120 5.11 15 <br />1,1-Dichloroethene 0.02 0.005 II 0.0200 92.1 80-120 0.435 15 <br />Chlorobenzene 0.02 0.005 0.0200 86.1 80-120 4.21 15 <br />Trichloroethene 0.02 0.005 II 0.0200 91.3 80-120 0.873 15 <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 muyt be reproduced in its entirety. <br />Laboratory Representative Page 5 of 18