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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(AJ53925-BS1) Prepared&Analyzed: 10/10/25 <br /> n-Butylbenzene 108 2.5 ug/kg 100 108 70-130 <br /> 1,2-Dibromo-3-chloropropane 101 2.5 ug/kg 100 101 70-130 <br /> 1,2,4-Trichlorobenzene 104 2.5 ug/kg 100 104 70-130 <br /> Naphthalene 100 2.5 ug/kg 100 100 70-130 <br /> Hexachlorobutadiene 107 2.5 ug/kg 100 107 70-130 <br /> 1,2,3-Trichlorobenzene 103 2.5 ug/kg 100 103 70-130 <br /> Acetone 2970 100 ug/kg 3000 98.8 70-130 <br /> Methyl ethyl ketone 244 5.0 ug/kg 250 97.6 70-130 <br /> Methyl isobutyl ketone 245 5.0 ug/kg 250 97.8 70-130 <br /> Surrogate:Dibromofluoromethane 49.4 ug/kg 50.0 98.8 70-130 <br /> Surrogate:Toluene-& 50.0 ug/kg 50.0 100 70-130 <br /> Surrogate:Bromofluorobenzene 52.0 ug/kg 50.0 104 70-130 <br /> LCS Dup(AJ53925-BSDI) Prepared&Analyzed: 10/10/25 <br /> Dichlorodifluoromethane 70.0 2.5 ug/kg 100 70.0 70-130 0.889 25 <br /> Chloromethane 90.0 2.5 ug/kg 100 90.0 70-130 0.388 25 <br /> Vinyl chloride 92.5 2.5 ug/kg 100 92.5 70-130 0.271 25 <br /> Bromomethane 93.2 2.5 ug/kg 100 93.2 70-130 8.63 25 <br /> Chloroethane 105 2.5 ug/kg 100 105 70-130 6.63 25 <br /> Trichlorofluoromethane 94.1 2.5 ug/kg 100 94.1 70-130 1.20 25 <br /> 1,1-Dichloroethene 96.8 2.5 ug/kg 100 96.8 70-130 0.596 25 <br /> 1,1,2-Trichlorotrifluoroethane 97.0 2.5 ug/kg 100 97.0 70-130 2.11 25 <br /> Tert-butyl alcohol 2550 100 ug/kg 3000 84.9 70-130 16.5 25 <br /> Methylene chloride 109 2.5 ug/kg 100 109 70-130 2.62 25 <br /> Carbon disulfide 94.6 2.5 ug/kg 100 94.6 70-130 1.38 30 <br /> Methyl tert-butyl ether 100 2.5 ug/kg 100 100 70-130 12.7 25 <br /> trans-1,2-Dichloroethene 87.4 2.5 ug/kg 100 87.4 70-130 18.8 25 <br /> 1,1-Dichloroethane 99.9 2.5 ug/kg 100 99.9 70-130 0.971 25 <br /> Di-isopropyl ether 101 2.5 ug/kg 100 101 70-130 0.846 25 <br /> cis-1,2-Dichloroethene 101 2.5 ug/kg 100 101 70-130 0.620 25 <br /> 2,2-Dichloropropane 103 2.5 ug/kg 100 103 70-130 2.14 25 <br /> Chloroform 101 2.5 ug/kg 100 101 70-130 0.570 25 <br /> Bromochloromethane 99.9 2.5 ug/kg 100 99.9 70-130 0.880 25 <br /> Tetrahydrof Iran 100 2.5 ug/kg 100 100 70-130 2.66 25 <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 8 of 18 <br />