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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: Graben,Inc. WorkOrder: 1905831 <br /> Date Prepared: 5/15/19 BatchID: 177948 <br /> Date Analyzed: 5/15/19-5/16/19 Extraction Method: SW5035 <br /> Instrument: GC19 Analytical Method: SW8021B/801513m <br /> Matrix: Soil Unit: mg/Kg <br /> Project: 250 Catalpa Sample ID: MB/LCS/LCSD-177948 <br /> QC Summary Report for SW8021B/8015Bm <br /> Analyte MB MDL RL SPK MB SS MB SS <br /> Result Val %REC Limits <br /> TPH(g)(C6-C12) 0.15,J 0.090 1.0 - - - <br /> MTBE ND 0.0023 0.050 - - - <br /> Benzene ND 0.0010 0.0050 - - - <br /> Toluene ND 0.0012 0.0050 - - - <br /> Ethylbenzene ND 0.0020 0.0050 - - - <br /> m,p-Xylene ND 0.0013 0.010 - - - <br /> o-Xylene ND 0.0013 0.0050 - - - <br /> Surrogate Recovery <br /> 2-Fluorotoluene 0.090 0.10 90 75-134 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> TPH(btex) 0.55 0.59 0.60 92 98 82-118 6.18 20 <br /> MTBE 0.086 0.081 0.10 86 81 61-119 5.81 20 <br /> Benzene 0.095 0.10 0.10 95 101 77-128 6.35 20 <br /> Toluene 0.098 0.10 0.10 98 103 74-132 5.36 20 <br /> Ethylbenzene 0.098 0.10 0.10 98 102 84-127 4.00 20 <br /> m,p-Xylene 0.20 0.21 0.20 99 104 80-120 4.21 20 <br /> o-Xylene 0.097 0.10 0.10 97 101 80-120 4.00 20 <br /> Surrogate Recovery <br /> 2-Fluorotoluene 0.092 0.093 0.10 92 93 75-134 0.980 20 <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 9 of 14 <br />