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1534 Willow Pass Road,Pittsburg,CA 94565-1701 M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 ' "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com Quality Control Report Client: AdvancedGeo,Inc. WorkOrder: 2503L69 Date Prepared: 03/31/2025 BatchID: 314331 Date Analyzed: 04/01/2025 Extraction Method: SW5030B Instrument: GC49 Analytical Method: SW8260D Matrix: Soil Unit: mg/kg Project: SUSD-Weber Institute Sample ID: MB/LCS/LCSD-314331 QC Summary Report for SW8260D Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD Result Result Val %REC %REC Limits Limit Acetone 0.19 0.19 0.20 96 95 60-140 1.45 30 tert-Amyl methyl ether(TAME) 0.012 0.014 0.020 62 69 50-140 9.28 30 Benzene 0.015 0.017 0.020 76 83 60-140 8.58 30 Bromobenzene 0.018 0.017 0.020 90 87 60-140 3.69 30 Bromochlorom ethane 0.015 0.016 0.020 75 80 60-140 7.16 30 Bromodichloromethane 0.015 0.015 0.020 74 76 60-140 3.72 30 Bromoform 0.011 0.012 0.020 55 59 40-140 5.53 30 Bromomethane 0.016 0.019 0.020 79 95 30-140 19.2 30 2-Butanone(MEK) 0.060 0.048 0.080 75 60 50-140 22.5 30 t-Butyl alcohol(TBA) 0.054 0.059 0.080 68 74 50-140 8.21 30 n-Butyl benzene 0.023 0.022 0.020 113 110 60-150 2.99 30 sec-Butyl benzene 0.024 0.022 0.020 119 111 60-150 7.31 30 tert-Butyl benzene 0.023 0.021 0.020 113 105 60-140 7.52 30 Carbon Disulfide 0.015 0.019 0.020 75 93 50-140 21.3 30 Carbon Tetrachloride 0.015 0.017 0.020 77 83 60-140 7.50 30 Chlorobenzene 0.017 0.017 0.020 86 86 60-140 0.299 30 Chloroethane 0.013 0.016 0.020 65 80 50-140 21.1 30 Chloroform 0.016 0.017 0.020 79 83 60-140 5.38 30 Chloromethane 0.0093 0.012 0.020 47 62 20-140 28.2 30 2-Chlorotoluene 0.021 0.020 0.020 106 98 60-140 6.95 30 4-Chlorotoluene 0.021 0.020 0.020 104 100 60-140 4.23 30 Dibromochloromethane 0.015 0.015 0.020 73 74 50-140 1.68 30 1,2-Dibromo-3-chloropropane 0.0058 0.0056 0.010 58 56 30-140 3.96 30 1,2-Dibromoethane(EDB) 0.0075 0.0075 0.010 75 75 40-140 0.0412 30 Dibromomethane 0.015 0.016 0.020 75 77 60-140 2.99 30 1,2-Dichlorobenzene 0.018 0.017 0.020 91 86 60-140 4.93 30 1,3-Dichlorobenzene 0.019 0.018 0.020 94 89 60-140 5.43 30 1,4-Dichlorobenzene 0.018 0.018 0.020 92 88 60-140 3.58 30 Dichlorodifluoromethane 0.0048 0.0067 0.020 24 34 10-140 33.1,F2 30 1,1-Dichloroethane 0.016 0.017 0.020 78 86 60-140 8.97 30 1,2-Dichloroethane(1,2-DCA) 0.014 0.015 0.020 69 75 60-140 7.92 30 1,1-Dichloroethene 0.015 0.018 0.020 76 89 60-140 16.1 30 cis-1,2-Dichloroethene 0.016 0.017 0.020 80 86 60-140 6.68 30 trans-1,2-Dichloroethene 0.015 0.018 0.020 75 90 60-140 18.6 30 1,2-Dichloropropane 0.016 0.017 0.020 81 86 60-140 5.79 30 1,3-Dichloropropane 0.016 0.017 0.020 82 83 60-140 1.43 30 2,2-Dichloropropane 0.016 0.018 0.020 82 89 60-140 8.10 30 1,1-Dichloropropene 0.016 0.018 0.020 80 88 60-140 9.80 30 (Cont.) CA ELAP 1644•NELAP 4033ORELAP