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McCampbell Analytical, Inc. <br />"When Quality Counts" <br />1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.mccampbell.com / E-mail: main@mccampbell.com <br /> <br />Quality Control Report <br />Client: Excelchem Environmental Labs <br />Date Prepared: 07/26/2022 <br />Date Analyzed: 07/26/2022 - 07/31/2022 <br />Instrument: GC19, GC7 <br />Matrix: Soil <br />Project: 2207177 <br />WorkOrder: 2207E34 <br />BatchID: 250384 <br />Extraction Method: 5W5035 <br />Analytical Method: SW8021B/8015Bm <br />Unit: mg/Kg <br />Sample ID: MB/LCS/LCSD-250384 <br />QC Summary Report for SW8021B/8015Bm <br />Analyte MB <br />Result <br />MDL RL SPK <br />Val <br />MB SS <br />%REC <br />MB SS <br />Limits <br />TPH(g) (C6-C12) ND 0.55 1.0 <br />MTBE ND 0.0026 0.050 <br />Benzene ND 0.0018 0.0050 <br />Toluene ND 0.0022 0.0050 <br />Ethylbenzene ND 0.0015 0.0050 <br />m,p-Xylene ND 0.0026 0.010 <br />o-Xylene ND 0.00098 0.0050 <br />Surrogate Recovery <br />2-Fluorotoluene 0.077 0.1 77 75-134 <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />%REC <br />LCSD <br />%REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />TPH(btex) 0.55 0.61 0.60 92 101 82-118 9.08 20 <br />MTBE 0.094 0.091 0.10 94 91 61-119 3.57 20 <br />Benzene 0.087 0.091 0.10 87 91 77-128 4.15 20 <br />Toluene 0.093 0.098 0.10 93 98 74-132 4.98 20 <br />Ethylbenzene 0.091 0.093 0.10 91 93 84-127 1.82 20 <br />m,p-Xylene 0.18 0.19 0.20 92 96 80-120 3.24 20 <br />o-Xylene 0.093 0.094 0.10 93 94 80-120 0.126 20 <br />Surrogate Recovery <br />2-Fluorotoluene 0.081 0.083 0.10 81 83 75-134 1.83 20 <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 5 of 9