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Qae <br />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: 02/18/2021 <br />Date Analyzed: 02/18/2021 <br />Instrument: GC18 <br />Matrix: Soil <br />Project: 91-57962-PW; FUHSD <br />WorkOrder: 2102A42 <br />BatchID: 215583 <br />Extraction Method: 5W5030B <br />Analytical Method: SW8260B <br />Unit: mg/kg <br />Sample ID: MB/LCS/LCSD-215583 <br />QC Summary Report for SW8260B <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />VoREC <br />LCSD <br />VOREC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />Acetone 0.289 0.290 0.20 144,F2 145,F2 60-140 0.218 20 <br />tert-Amyl methyl ether (TAME) 0.0165 0.0172 0.020 83 86 50-140 3.81 20 <br />Benzene 0.0163 0.0176 0.020 82 88 60-140 7.21 20 <br />Bromobenzene 0.0163 0.0175 0.020 82 88 60-140 7.09 20 <br />Bromochloromethane 0.0179 0.0190 0.020 90 95 60-140 6.05 20 <br />Bromodichloromethane 0.0168 0.0179 0.020 84 90 60-140 6.40 20 <br />Bromoforrn 0.0132 0.0138 0.020 66 69 40-140 4.38 20 <br />Bromomethane 0.0112 0.0110 0.020 56 55 30-140 1.26 20 <br />2-Butanone (MEK) 0.0779 0.0787 0.080 97 98 50-140 1.05 20 <br />t-Butyl alcohol (TBA) 0.0740 0.0619 0.080 92 77 50-140 17.8 20 <br />n-Butyl benzene 0.0219 0.0231 0.020 110 116 60-150 5.23 20 <br />sec-Butyl benzene 0.0211 0.0228 0.020 105 114 60-150 7.81 20 <br />tert-Butyl benzene 0.0189 0.0210 0.020 94 105 60-140 10.6 20 <br />Carbon Disulfide 0.0139 0.0148 0.020 70 74 50-140 5.91 20 <br />Carbon Tetrachloride 0.0127 0.0139 0.020 64 69 60-140 8.43 20 <br />Chlorobenzene 0.0166 0.0173 0.020 83 87 60-140 4.37 20 <br />Chloroethane 0.0139 0.0149 0.020 70 75 50-140 7.09 20 <br />Chloroform 0.0181 0.0191 0.020 90 95 60-140 5.46 20 <br />Chloromethane 0.0127 0.0146 0.020 64 73 20-140 13.6 20 <br />2-Chlorotoluene 0.0182 0.0191 0.020 91 95 60-140 4.92 20 <br />4-Chlorotoluene 0.0174 0.0187 0.020 87 93 60-140 7.29 20 <br />Dibromochloromethane 0.0150 0.0155 0.020 75 78 50-140 3.19 20 <br />1,2-Dibromo-3-chloropropane 0.00810 0.00721 0.010 81 72 30-140 11.6 20 <br />1,2-Dibromoethane (EDB) 0.00820 0.00855 0.010 82 85 40-140 4.12 20 <br />Dibromomethane 0.0174 0.0183 0.020 87 92 60-140 4.93 20 <br />1,2-Dichlorobenzene 0.0149 0.0158 0.020 75 79 60-140 5.61 20 <br />1,3-Dichlorobenzene 0.0180 0.0195 0.020 90 97 60-140 7.96 20 <br />1,4-Dichlorobenzene 0.0169 0.0178 0.020 84 89 60-140 5.60 20 <br />Dichlorodifluoromethane 0.00503 0.00537 0.020 25 27 10-140 6.42 20 <br />1,1-Dichloroethane 0.0174 0.0186 0.020 87 93 60-140 6.74 20 <br />1,2-Dichloroethane (1,2-DCA) 0.0174 0.0185 0.020 87 92 60-140 5.87 20 <br />1,1-Dichloroethene 0.0134 0.0144 0.020 67 72 60-140 7.15 20 <br />cis-1,2-Dichloroethene 0.0169 0.0181 0.020 84 90 60-140 6.80 20 <br />trans-1,2-Dichloroethene 0.0162 0.0173 0.020 81 86 60-140 6.39 20 <br />1,2-Dichloropropane 0.0173 0.0185 0.020 86 92 60-140 6.71 20 <br />1,3-Dichloropropane 0.0202 0.0206 0.020 101 103 60-140 2.17 20 <br />2,2-Dichloropropane 0.0188 0.0203 0.020 94 102 60-140 7.71 20 <br />1,1-Dichloropropene 0.0163 0.0175 0.020 81 88 60-140 7.34 20 <br />(Cont.) <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 48 of 68