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Sun Star 25712 Commercentre Drive <br /> Laboratories, Inc. Lake Forest,California 92630 <br /> PR!]V1DING QOALnv ANnrr7ieAc SEsvices NA'rlOWwmi- 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 08/23/23 14:47 <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 23HO284-EPA 5030 GCMS <br /> Blank(23H0284-BLKI) Prepared:08/21/23 Analyzed:08/22/23 <br /> 1,2,4-Trimethylbenzene ND 2.5 ug/kg <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 /> Tert-amyl methyl ether ND 10 " <br /> Tert-butyl alcohol ND 25 <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-butyl ether ND 10 <br /> Methyl tert-butyl ether ND 10 " <br /> Acetone ND 2.5 <br /> Methyl ethyl ketone ND 5.0 <br /> Methyl isobutyl ketone ND 5.0 <br /> 2-Hexanone(MBK) ND 2.5 " <br /> Surrogate:4-Bromofluorobenzene 46.8 50.0 93.5 81.9-128 <br /> Surrogate:Dibromofluoromethane 53.8 50.0 108 73-126 <br /> Surrogate:Toluene-d8 49.4 50.0 98.8 80.4-121 <br /> LCS(23H0284-BS1) Prepared:08/21/23 Analyzed:08/22/23 <br /> Chlorobenzene 45.9 2.5 ug/kg 50.0 91.7 65.2-124 <br /> 1,1-Dichloroethene 51.5 2.5 50.0 103 60.9-131 <br /> Trichloroethene 48.4 2.5 50.0 96.7 62.1-126 <br /> Benzene 45.1 2.5 50.0 90.3 65.3-127 <br /> Toluene 46.2 2.5 50.0 92.4 64.3-122 <br /> Surrogate:4-Bromofluorobenzene 49.6 50.0 99.3 81.9-128 <br /> Surrogate:Dibromofluoromethane 54.5 50.0 109 73-126 <br /> Surrogate:Toluene-d8 51.2 50.0 102 80.4-121 <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 /> 7 <br /> Rebecca Traficanto,Project Manager Page 88 of 90 <br />