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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 MB MDL RL SPK MB IS/SS MB IS/SS <br /> Result Val %REC Limits <br /> Surrogate Recovery <br /> 2-Fluorophenol 1.4 1.25 108 70-130 <br /> Phenol-d5 1.1 1.25 90 70-130 <br /> Nitrobenzene-d5 1.3 1.25 104 60-130 <br /> 2-Fluorobiphenyl 1.2 1.25 100 60-130 <br /> 2,4,6-Tribromophenol 1.1 1.25 90 30-130 <br /> 4-TerphenyW14 1.5 1.25 117 40-130 <br /> (Cont.) <br /> CA ELAP 1644.ORELAP(NELAP)4033 <br /> Page 21 of 36 <br />