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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Kirkwood Meadows Public Untility District WorkOrder: 2604713 <br /> Date Prepared: 04/10/2026 BatchID: 339405 <br /> Date Analyzed: 04/12/2026-04/13/2026 Extraction Method: SW5030B <br /> Instrument: GC45,GC49 Analytical Method: SW8260D <br /> Matrix: Soil Unit: mg/kg <br /> Project: Kirkwood WWTP Sample ID: MB/LCS/LCSD-339405 <br /> QC Summary Report for SW8260D <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> cis-1,3-Dichloropropene 0.017 0.016 0.020 84 81 60-140 3.62 30 <br /> trans-1,3-Dichloropropene 0.017 0.016 0.020 83 80 60-140 2.99 30 <br /> Diisopropyl ether(DIPE) 0.015 0.015 0.020 75 73 60-140 3.05 30 <br /> Ethylbenzene 0.019 0.019 0.020 96 95 60-140 1.38 30 <br /> Ethyl tert-butyl ether(ETBE) 0.015 0.015 0.020 76 74 60-140 2.21 30 <br /> Freon 113 0.015 0.015 0.020 74 73 50-140 1.50 30 <br /> Hexachlorobutadiene 0.023 0.023 0.020 113 113 60-140 0.102 30 <br /> Hexachloroethane 0.020 0.020 0.020 101 101 60-140 0.529 30 <br /> 2-Hexanone 0.014 0.013 0.020 68 67 40-140 1.52 30 <br /> Isopropyl benzene 0.023 0.022 0.020 114 ill 60-140 1.98 30 <br /> 4-Isopropyl toluene 0.024 0.023 0.020 120 117 60-150 2.52 30 <br /> Methyl-t-butyl ether(MTBE) 0.015 0.014 0.020 76 72 50-140 6.18 30 <br /> Methylene chloride 0.025 0.024 0.020 124 119 60-140 3.99 30 <br /> 4-Methyl-2-pentanone(MIBK) 0.013 0.012 0.020 63 60 50-140 5.23 30 <br /> Naphthalene 0.010 0.0098 0.020 52 49 30-140 5.94 30 <br /> n-Propyl benzene 0.022 0.022 0.020 ill 109 60-140 1.76 30 <br /> Styrene 0.018 0.018 0.020 89 88 60-140 0.966 30 <br /> 1,1,1,2-Tetrachloroethane 0.018 0.018 0.020 92 90 60-140 2.13 30 <br /> 1,1,2,2-Tetrachloroethane 0.017 0.017 0.020 86 83 40-140 3.88 30 <br /> Tetrachloroethene 0.020 0.020 0.020 101 98 60-140 2.91 30 <br /> Toluene 0.018 0.018 0.020 92 89 60-140 3.34 30 <br /> 1,2,3-Trichlorobenzene 0.013 0.012 0.020 63 61 40-140 2.82 30 <br /> 1,2,4-Trichlorobenzene 0.016 0.016 0.020 81 78 50-140 3.19 30 <br /> 1,1,1-Trichloroethane 0.018 0.017 0.020 88 86 60-140 2.21 30 <br /> 1,1,2-Trichloroethane 0.018 0.017 0.020 88 85 60-140 4.07 30 <br /> Trichloroethene 0.019 0.019 0.020 95 93 60-140 1.65 30 <br /> Trichlorofluoromethane 0.018 0.018 0.020 89 88 50-140 1.39 30 <br /> 1,2,3-Trichloropropane 0.0096 0.0093 0.010 96 93 60-130 3.49 30 <br /> 1,2,4-Tri methyl benzene 0.020 0.020 0.020 100 98 30-140 1.42 30 <br /> 1,3,5-Tri methyl benzene 0.022 0.022 0.020 111 109 60-140 1.90 30 <br /> Vinyl Chloride 0.0073 0.0072 0.010 73 72 30-140 1.58 30 <br /> m,p-Xylene 0.037 0.036 0.040 91 90 60-140 1.06 30 <br /> o-Xylene 0.017 0.017 0.020 86 84 60-140 2.06 30 <br /> (Cont.) <br /> CA ELAP 1644.ORELAP(NELAP)4033 <br /> Page 17 of 36 <br />