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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 /> Blank(AJ53925-BLK1) Prepared&Analyzed: 10/10/25 <br /> Methyl ethyl ketone ND 5.0 ug/kg <br /> Methyl isobutyl ketone ND 5.0 ug/kg <br /> Surrogate:Dibromofluoromethane 51.8 ug/kg 50.0 104 70-130 <br /> Surrogate:Toluene-d8 48.4 ug/kg 50.0 96.8 70-130 <br /> Surrogate:Bromofluorobenzene 44.7 ug/kg 50.0 89.4 70-130 <br /> LCS(AJ53925-BS1) Prepared&Analyzed: 10/10/25 <br /> Dichlorodifluoromethane 70.6 2.5 ug/kg 100 70.6 70-130 <br /> Chloromethane 90.4 2.5 ug/kg 100 90.4 70-130 <br /> Vinyl chloride 92.2 2.5 ug/kg 100 92.2 70-130 <br /> Bromomethane 102 2.5 ug/kg 100 102 70-130 <br /> Chloroethane 113 2.5 ug/kg 100 113 70-130 <br /> Trichlorofluoromethane 93.0 2.5 ug/kg 100 93.0 70-130 <br /> 1,1-Dichloroethene 96.2 2.5 ug/kg 100 96.2 70-130 <br /> 1,1,2-Trichlorotrifluoroethane 95.0 2.5 ug/kg 100 95.0 70-130 <br /> Tert-butyl alcohol 3010 100 ug/kg 3000 100 70-130 <br /> Methylene chloride 107 2.5 ug/kg 100 107 70-130 <br /> Carbon disulfide 93.3 2.5 ug/kg 100 93.3 70-130 <br /> Methyl tert-butyl ether 114 2.5 ug/kg 100 114 70-130 <br /> trans-1,2-Dichloroethene 106 2.5 ug/kg 100 106 70-130 <br /> 1,1-Dichloroethane 101 2.5 ug/kg 100 101 70-130 <br /> Di-isopropyl ether 100 2.5 ug/kg 100 100 70-130 <br /> cis-1,2-Dichloroethene 101 2.5 ug/kg 100 101 70-130 <br /> 2,2-Dichloropropane 105 2.5 ug/kg 100 105 70-130 <br /> Chloroform 101 2.5 ug/kg 100 101 70-130 <br /> Bromochloromethane 99.0 2.5 ug/kg 100 99.0 70-130 <br /> Tetrahydrofuran 97.4 2.5 ug/kg 100 97.4 70-130 <br /> 1,1,1-Trichloroethane 101 2.5 ug/kg 100 101 70-130 <br /> 1,2-Dichloroethane 100 2.5 ug/kg 100 100 70-130 <br /> 1,1-Dichloropropene 101 2.5 ug/kg 100 101 70-130 <br /> Carbon tetrachloride 101 2.5 ug/kg 100 101 70-130 <br /> Benzene 101 2.5 ug/kg 100 101 70-130 <br /> Tert-amyl methyl ether 99.6 2.5 ug/kg 100 99.6 70-130 <br /> Trichloroethene 99.8 2.5 ug/kg 100 99.8 70-130 <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 6 of 18 <br />