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l 1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> M c C a m p b e I l Analytic al, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Countsrr http://www.mccanTbell.com/E-mail:main@mccmVbell.com <br /> Quality Control Report <br /> Client: GHD Services,Inc. WorkOrder: 1910581 <br /> Date Prepared: 10/11/19 BatchID: 186943 <br /> Date Analyzed: 10/11/19- 10/12/19 Extraction Method: SW5030B <br /> Instrument: GC16 Analytical Method: SW8260B <br /> Matrix: Soil Unit: mg/kg <br /> Project: 11202858-07.11;Chevron 372736-UDC Removal Sample ID: MB/LCS/LCSD-186943 <br /> QC Summary Report for SW8260B <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Surrogate Recovery <br /> Dibromofluoromethane 0.10 0.10 0.12 83 83 66-112 0 20 <br /> Toluene-d8 0.14 0.14 0.12 116,F3 115,F3 92-109 0.350 20 <br /> 4-BFB 0.011 0.010 0.012 86 82 72-112 4.26 20 <br /> Benzene-d6 0.088 0.10 0.10 88 101 81-126 13.4 20 <br /> Ethyl benzene-d10 0.13 0.17 0.10 134 174,F3 92-138 26.2,F3 20 <br /> 1,2-DCB-d4 0.075 0.078 0.10 75 78 68-108 3.23 20 <br /> (Cont.) <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 50 of 72 <br />