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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 08/07/20 16:16 <br />Volatile Organic Compounds by GC/MS - Quality Control <br />Analyte Result <br />Retliomrtiitng <br />Units <br />Spike Source <br />Level Result VoREC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch AAG0221 - EPA 8260B <br />LCS (AAG0221-BS1) Prepared &Analyzed: 07/27/20 <br />Surrogate: Dibromofluoromethane 14.3 ugh 12.5 115 70-130 <br />Surrogate: Toluene-d8 12.4 12.5 99.3 70-130 <br />Surrogate: 4-Bromofluorobenzene 12.0 12.5 96.3 70-130 <br />Benzene 20.7 0.5 20.0 103 80-120 <br />Toluene 192 0.5 20.0 95.8 80-120 <br />1,1-Dichloroethene 24.1 0.5 20.0 120 80-120 <br />Trichloroethene 20.1 0.5 20.0 101 80-120 <br />Chlorobenzene 21.1 0.5 20.0 106 80-120 <br />LCS Dup (AAG0221-BSD1) Prepared &Analyzed: 07/27/20 <br />Surrogate: Dibromofluoramethane 14.3 ug/l 12.5 114 70-130 <br />Surrogate: Toluene-d8 13.2 12.5 105 70-130 <br />Surrogate. 4-Bromolluorobenzene 12.3 12.5 98.3 70-130 <br />Benzene 20.8 0.5 20.0 104 80-120 0.531 15 <br />Toluene 21.0 0.5 20.0 105 80-120 8.87 15 <br />1,1-Dichloroethene 24.1 0.5 20.0 120 80-120 0.208 15 <br />Trichloroethene 20.8 0.5 20.0 104 80-120 3.52 15 <br />Chlorobenzene 21.5 0.5 20.0 107 80-120 1.64 15 <br />Matrix Spike (AAG0221-MS1) Source: 2007105-01 Prepared &Analyzed: 07/27/20 <br />Surrogate: Dibromofluoromethane 13.8 ugh 12.5 110 70-130 <br />Surrogate: Toluene-d8 13.3 12.5 107 70-130 <br />Surrogate: 4-Bromofluorobenzene 12.4 12.5 99.0 70-130 <br />Benzene 18.9 0.5 20.0 0.6 91.7 80-120 <br />Toluene 19.4 0.5 20.0 0.4 94.6 80-120 <br />1,1-Dichloroethene 20.3 0.5 20.0 ND 101 80-120 <br />Trichloroethene 17.8 0.5 20.0 ND 89.0 80-120 <br />Chlorobenzene 19.8 0.5 20.0 ND 98.8 80-120 <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 7 of 18