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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 23EO355-EPA 5030 GCMS <br /> Blank(23E0355-BLKI) Prepared:05/18/23 Analyzed:05/22/23 <br /> 1,2,3-Trichloropropane ND 2.5 ug/kg <br /> 1,3,5-Trimethylbenzene ND 2.5 <br /> 1,2,4-Trimethylbenzene ND 2.5 <br /> Vinyl chloride ND 2.5 <br /> Benzene ND 2.5 <br /> Toluene ND 2.5 <br /> Ethylbenzene ND 2.5 <br /> m,p-Xylene ND 5.0 <br /> o-Xylene ND 2.5 <br /> Methyl tert-butyl ether ND 10 <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 52.1 50.0 104 75.4-139 <br /> Surrogate:Dibromofluoromethane 49.6 50.0 99.2 73.1-125 <br /> Surrogate:Toluene-d8 49.8 50.0 99.6 82.6-117 <br /> LCS(23E0355-BS1) Prepared:05/18/23 Analyzed:05/22/23 <br /> Chlorobenzene 56.4 2.5 ug/kg 50.0 113 65.2-124 <br /> 1,1-Dichloroethene 51.3 2.5 50.0 103 60.9-131 <br /> Trichloroethene 51.7 2.5 50.0 103 62.1-126 <br /> Benzene 52.1 2.5 50.0 104 65.3-127 <br /> Toluene 51.6 2.5 50.0 103 64.3-122 <br /> Surrogate:4-Bromofluorobenzene 51.3 50.0 103 75.4-139 <br /> Surrogate:Dibromofluoromethane 47.5 50.0 95.0 73.1-125 <br /> Surrogate:Toluene-d8 49.5 50.0 99.0 82.6-117 <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 119 of 124 <br />