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Quality Control Report <br />McCampbell Analytical, Inc.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"When Quality Counts" <br />Client:AdvancedGeo, Inc. <br />Project:Pilkington <br />Date Analyzed:02/02/2021 - 02/03/2021 <br />Date Prepared:02/02/2021 <br />WorkOrder:2102062 <br />BatchID:214294 <br />Analytical Method:SW8021B/8015Bm <br />Unit:mg/Kg <br />Sample ID:MB/LCS/LCSD-214294 <br />2102062-013AMS/MSD <br />Instrument:GC19, GC7 <br />Matrix:Soil <br />Extraction Method:SW5035 <br />QC Summary Report for SW8021B/8015Bm <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)0.635 0.633 0.60 106 106 82-118 0.301 20 <br />MTBE 0.0766 0.0804 0.10 77 80 61-119 4.85 20 <br />Benzene 0.0963 0.106 0.10 96 106 77-128 9.21 20 <br />Toluene 0.102 0.111 0.10 102 111 74-132 8.44 20 <br />Ethylbenzene 0.106 0.112 0.10 106 112 84-127 5.02 20 <br />m,p-Xylene 0.218 0.228 0.20 109 114 80-120 4.58 20 <br />o-Xylene 0.104 0.108 0.10 104 108 80-120 3.93 20 <br />Surrogate Recovery <br />2-Fluorotoluene 0.0950 0.103 0.10 95 103 75-134 8.53 20 <br />Analyte MS <br />Result <br />MSD <br />Result <br />SPK <br />Val <br />SPKRef <br />Val <br />MS <br />%REC <br />MSD <br />%REC <br />MS/MSD <br /> Limits <br />RPD RPD <br />Limit <br />MS <br />DF <br />TPH(btex)0.451 0.442 0.60 ND 75 74 58-129 2.13 201 <br />MTBE 0.0908 0.0791 0.10 ND 85 74 47-118 13.8 201 <br />Benzene 0.0988 0.0962 0.10 ND 99 96 55-129 2.62 201 <br />Toluene 0.0998 0.0972 0.10 ND 100 97 56-130 2.58 201 <br />Ethylbenzene 0.0990 0.0964 0.10 ND 99 96 63-129 2.63 201 <br />m,p-Xylene 0.199 0.202 0.20 ND 99 101 80-120 1.73 201 <br />o-Xylene 0.101 0.104 0.10 ND 101 104 80-120 3.09 201 <br />Surrogate Recovery <br />2-Fluorotoluene 0.0881 0.0871 0.101 88 87 62-126 1.19 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 139 of 154