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SunStar 25712 Commercentre Drive <br /> Laboratories, Inc. Lake Forest,California 92630 <br /> PROVIDING QUAuTY ANALYTICAL SERVICES NATIoNWine 949.297.5020 Phone <br /> 949.297.5027 Fax <br /> Brusca Associates Inc. Project: Anderson Barn Grover Ranch <br /> PO Box 332 Project Number: 260-004 Reported: <br /> Roseville CA,95661 Project Manager: Joe Brusca 07/10/23 10:36 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> SunStar Laboratories,Inc. <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 23EO345-EPA 5030 GCMS <br /> Blank(23E0345-BLKI) Prepared:05/18/23 Analyzed:05/19/23 <br /> p-Isopropyltoluene ND 1.0 ug/l <br /> Methylene chloride ND 5.0 <br /> Naphthalene ND 1.0 <br /> n-Propylbenzene ND 1.0 <br /> Styrene ND 1.0 <br /> 1,1,2,2-Tetrachloroethane ND 1.0 <br /> 1,1,1,2-Tetrachloroethane ND 1.0 <br /> Tetrachloroethene ND 1.0 <br /> 1,2,3-Trichlorobenzene ND 1.0 <br /> 1,2,4-Trichlorobenzene ND 1.0 <br /> 1,1,2-Trichloroethane ND 1.0 <br /> 1,1,1-Trichloroethane ND 1.0 <br /> Trichloroethene ND 1.0 <br /> Trichlorofluoromethane ND 1.0 <br /> 1,2,3-Trichloropropane ND 1.0 <br /> 1,3,5-Trimethylbenzene ND 1.0 <br /> 1,2,4-Trimethylbenzene ND 1.0 <br /> Vinyl chloride ND 0.50 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> m,p-Xylene ND 2.0 <br /> o-Xylene ND 0.50 <br /> Methyl tert-butyl ether ND 1.0 <br /> Acetone ND 5.0 <br /> Methyl ethyl ketone ND 5.0 <br /> Methyl isobutyl ketone ND 5.0 <br /> 2-Hexanone(MBK) ND 5.0 <br /> Surrogate:4-Bromofluorobenzene 17.6 20.0 87.8 76.7-116 <br /> Surrogate:Dibromofluoromethane 20.7 20.0 104 78.7-127 <br /> Surrogate:Toluene-d8 21.3 20.0 106 84.7-108 <br /> SunStar 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 /> Rebecca Traficanto,Project Manager Page 116 of 124 <br />