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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: Atlas Technical Consultants <br />Date Prepared: 02/22/2021 <br />Date Analyzed: 02/23/2021 <br />Instrument: GC19, GC3, GC7 <br />Matrix: Soil <br />Project: 91-57962-PW; FUHSD <br />WorkOrder: 2102A42 <br />BatchID: 215906 <br />Extraction Method: SW5035 <br />Analytical Method: SW8021B/8015Bm <br />Unit: mg/Kg <br />Sample ID: MB/LCS/LCSD-215906 <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 0.610 1.00 <br />MTBE ND 0.00340 0.0500 <br />Benzene ND 0.00190 0.00500 <br />Toluene ND 0.00240 0.00500 <br />Ethylbenzene ND 0.00170 0.00500 <br />m,p-Xylene ND 0.00260 0.0100 <br />o-Xylene ND 0.000910 0.00500 <br />Surrogate Recovery <br />2-Fluorotoluene 0.0940 0.1 94 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) 0.695 0.682 0.60 116 114 82-118 1.99 20 <br />MTBE 0.0755 0.0800 0.10 76 80 61-119 5.83 20 <br />Benzene 0.0961 0.106 0.10 96 106 77-128 9.96 20 <br />Toluene 0.100 0.109 0.10 100 109 74-132 8.92 20 <br />Ethylbenzene 0.105 0.112 0.10 105 112 84-127 6.31 20 <br />m,p-Xylene 0.219 0.237 0.20 110 118 80-120 7.77 20 <br />o-Xylene 0.103 0.110 0.10 103 110 80-120 7.31 20 <br />Surrogate Recovery <br />2-Fluorotoluene 0.0983 0.106 0.10 98 106 75-134 7.10 20 <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 60 of 68