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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: 339406 <br /> Date Analyzed: 04/12/2026 Extraction Method: SW3550 B <br /> Instrument: GC9a Analytical Method: SW8015 B <br /> Matrix: Soil Unit: mg/Kg <br /> Project: Kirkwood WWTP Sample ID: MB/LCS/LCSD-339406 <br /> QC Report for SW8015B w/out SG Clean-Up <br /> Analyte MB MDL RL SPK MB IS/SS MB IS/SS <br /> Result Val %REC Limits <br /> TPH-Diesel(C10-C23) ND 1.1 2.0 - <br /> TPH-Motor Oil(C18-C36) ND 2.1 10 - - - <br /> Surrogate Recovery <br /> C9 22 25 87 76-153 <br /> Reagent-Blank Sample ID: GC9a_041226_0420 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> TPH-Diesel(C10-C23) 40 39 40 100 98 70-130 1.51 20 <br /> Surrogate Recovery <br /> C9 22 25 25 89 100 76-153 11.2 20 <br /> Reagent-Blank Sample ID for LCS: GC9a_041226_0420 Reagent-Blank Sample ID for LCSD: GC9a_041226_0420 <br /> CA ELAP 1644•ORELAP(NELAP)4033 <br /> Page 27 of 36 <br />