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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> _ M c C a m p b e I I 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: 339413 <br /> Date Analyzed: 04/10/2026 Extraction Method: SW3550B <br /> Instrument: GC48 Analytical Method: SW8270E <br /> Matrix: Soil Unit: mg/Kg <br /> Project: Kirkwood WWTP Sample ID: MB/LCS/LCSD-339413 <br /> QC Summary Report for SW8270E <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> 2,4-Dinitrophenol 0.75 0.80 1.25 60 64 15-130 6.02 30 <br /> 2,4-Dinitrotoluene 0.060 0.061 0.062 96 98 70-130 2.25 30 <br /> 2,6-Dichlorophenol 0.062 0.067 0.062 98 107 60-130 8.41 30 <br /> 2,6-Dinitrotoluene 0.064 0.062 0.062 102 100 60-130 1.83 30 <br /> Di-n-octyl Phthalate 1.5 1.6 1.25 118 126 60-130 6.60 30 <br /> 1,2-Diphenylhydrazine 1.4 1.5 1.25 114 120 60-130 5.61 30 <br /> Fluoranthene 0.064 0.071 0.062 103 113 70-130 10.0 30 <br /> Fluorene 0.069 0.068 0.062 110 109 60-130 0.988 30 <br /> Hexachlorobenzene 0.064 0.070 0.062 102 112 70-130 9.21 30 <br /> Hexachlorobutadiene 0.065 0.072 0.062 104 116 70-130 10.4 30 <br /> Hexachlorocyclopentadiene 7.2 7.0 6.25 115 112 60-130 3.43 30 <br /> Hexachloroethane 0.057 0.061 0.062 91 97 70-130 7.06 30 <br /> Indeno(1,2,3-cd)pyrene 0.057 0.062 0.062 91 99 70-130 7.88 30 <br /> Isophorone 1.5 1.7 1.25 123 138,F7 60-130 11.4 30 <br /> 1-Methyl naphthalene 0.060 0.067 0.062 96 108 70-130 11.1 30 <br /> 2-Methyl naphthalene 0.063 0.072 0.062 101 114 70-130 12.3 30 <br /> 2-Methylphenol(o-Cresol) 1.2 1.2 1.25 92 97 60-130 4.27 30 <br /> 3&4-Methylphenol(m,p-Cresol) 1.1 1.3 1.25 89 101 60-130 12.6 30 <br /> Naphthalene 0.063 0.070 0.062 101 113 70-130 10.8 30 <br /> 2-Nitroaniline 6.1 6.5 6.25 97 105 70-130 7.57 30 <br /> 3-Nitroaniline 5.2 5.2 6.25 83 83 50-130 0.223 30 <br /> 4-Nitroaniline 5.8 5.9 6.25 93 94 60-130 0.809 30 <br /> Nitrobenzene 1.2 1.3 1.25 95 107 60-130 11.9 30 <br /> 2-Nitrophenol 6.5 7.1 6.25 103 114 70-130 9.90 30 <br /> 4-Nitrophenol 5.5 5.5 6.25 87 88 60-130 1.28 30 <br /> N-Nitrosodimethylamine 1.0 1.1 1.25 80 86 70-130 7.73 30 <br /> N-Nitrosodi-n-propylamine 1.1 1.2 1.25 88 94 60-130 6.49 30 <br /> N-Nitrosodiphenylamine 1.2 1.4 1.25 100 108 70-130 8.38 30 <br /> Pentachlorophenol 0.31 0.34 0.31 98 107 50-130 8.74 30 <br /> Phenanthrene 0.066 0.072 0.062 106 115 60-130 8.12 30 <br /> Phenol 0.23 0.25 0.25 91 98 60-130 7.72 30 <br /> Pyrene 0.072 0.075 0.062 115 121 70-130 4.98 30 <br /> Pyridine 0.61 0.68 1.25 49,F5 54,F5 60-130 11.1 30 <br /> 2,3,4,6-Tetrachlorophenol 1.2 1.2 1.25 96 94 60-130 1.91 30 <br /> 1,2,4-Trichlorobenzene 1.2 1.4 1.25 98 108 60-130 10.0 30 <br /> 2,4,5-Trichlorophenol 0.060 0.060 0.062 95 96 60-130 0.867 30 <br /> 2,4,6-Trichlorophenol 0.058 0.054 0.062 93 87 60-130 6.10 30 <br /> (Cont.) <br /> CA ELAP 1644.ORELAP(NELAP)4033 <br /> Page 23 of 36 <br />