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Alpha Analytical Laboratories, Inc. email: rlientservices alpha-labs.com <br /> Corporate: 208 Mason Street I Ukiah, CA 95482 1 T, 707468-C401 l R 707468-5267 1 EL.AP# 1551 <br /> McCampbell Analytical/Alpha Quote 232557 Project Manager: Lab Reports <br /> 1534 Willow Pass Rd. Project: Soil Testing Reported: <br /> Pittsburg, CA 94565 Project Number: LLNL 13882-Disp 10/14/25 12:59 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte(s) Result Limit Units Level Result %REC Limits RPD Limit Flag <br /> Batch AJ53925-NB EPA 5030 Soil GCMS <br /> LCS Dup(AJ53925-BSD1) Prepared&Analyzed: 10/10/25 <br /> 1,2,4-Trimethylbenzene 105 2.5 ug/kg 100 105 70-130 2.42 25 <br /> sec-Butylbenzene 105 2.5 ug/kg 100 105 70-130 3.07 25 <br /> 1,3-Dichlorobenzene 105 2.5 ug/kg 100 105 70-130 2.28 25 <br /> p-Isopropyltoluene 105 2.5 ug/kg 100 105 70-130 3.28 25 <br /> 1,4-Dichlorobenzene 106 2.5 ug/kg 100 106 70-130 1.15 25 <br /> Ethyl tert-butyl ether 102 2.5 ug/kg 100 102 70-130 1.81 25 <br /> 1,2-Dichlorobenzene 106 2.5 ug/kg 100 106 70-130 0.889 25 <br /> n-Butylbenzene 106 2.5 ug/kg 100 106 70-130 2.27 25 <br /> 1,2-Dibromo-3-chloropropane 102 2.5 ug/kg 100 102 70-130 0.985 25 <br /> 1,2,4-Trichlorobenzene 103 2.5 ug/kg 100 103 70-130 0.314 25 <br /> Naphthalene 101 2.5 ug/kg 100 101 70-130 1.05 25 <br /> Hexachlorobutadiene 106 2.5 ug/kg 100 106 70-130 1.19 25 <br /> 1,2,3-Trichlorobenzene 104 2.5 ug/kg 100 104 70-130 0.848 25 <br /> Acetone 3040 100 ug/kg 3000 101 70-130 2.43 25 <br /> Methyl ethyl ketone 246 5.0 ug/kg 250 98.6 70-130 1.04 25 <br /> Methyl isobutyl ketone 248 5.0 ug/kg 250 99.0 70-130 1.19 25 <br /> Surrogate:Dibromofluoromethane 49.6 ug/kg 50.0 99.3 70-130 <br /> Surrogate:Toluene-d8 50.3 ug/kg 50.0 101 70-130 <br /> Surrogate:Bromofluorobenzene 51.8 ug/kg 50.0 104 70-130 <br /> MRL Check(AJ53925-MRLl) Prepared&Analyzed: 10/10/25 <br /> Dichlorodifluoromethane 5.80 2.5 ug/kg 2.50 232 50-200 <br /> Chloromethane 5.45 2.5 ug/kg 2.50 218 50-200 <br /> Vinyl chloride 4.72 2.5 ug/kg 2.50 189 50-200 <br /> Bromomethane 6.12 2.5 ug/kg 2.50 245 50-200 <br /> Chloroethane 3.48 2.5 ug/kg 2.50 139 50-200 <br /> Trichlorofluoromethane 4.08 2.5 ug/kg 2.50 163 50-200 <br /> 1,1-Dichloroethene 3.72 2.5 ug/kg 2.50 149 50-200 <br /> 1,1,2-Trichlorotrifluoroethane 2.58 2.5 ug/kg 2.50 103 50-200 <br /> Tert-butyl alcohol 199 100 ug/kg 75.0 266 50-200 <br /> Methylene chloride 15.8 2.5 ug/kg 2.50 630 50-200 <br /> Carbon disulfide 3.85 2.5 ug/kg 2.50 154 50-200 <br /> Methyl tert-butyl ether 3.52 2.5 ug/kg 2.50 141 50-200 <br /> trans-1,2-Dichloroethene 4.18 2.5 ug/kg 2.50 167 50-200 <br /> The results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. <br /> Page 10 of 18 <br />