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1534 Willow Pass Road,Pittsburg,CA 94565-1701 M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com Quality Control Report Client: GHD Services,Inc. WorkOrder: 1910846 Date Prepared: 10/17/19 BatchID: 187314 Date Analyzed: 10/17/19 Extraction Method: SW5030B Instrument: GC38 Analytical Method: SW8260B Matrix: Soil Unit: mg/kg Project: 11202858-07.00;Chevron 372736-UDC Removal Sample ID: MB/LCS/LCSD-187314 QC Summary Report for SW8260B Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD Result Result Val %REC %REC Limits Limit Acetone 0.29 0.27 0.20 143,1`2 135,1`2 59-127 5.78 20 tert-Amyl methyl ether(TAME) 0.018 0.017 0.020 90 84 54-98 7.01 20 Benzene 0.020 0.018 0.020 98 92 71-115 6.34 20 Bromobenzene 0.020 0.020 0.020 98 99 69-120 1.22 20 Bromochloromethane 0.022 0.021 0.020 111 104 63-117 6.96 20 Bromodichloromethane 0.018 0.017 0.020 90 84 61-109 6.60 20 Bromoform 0.014 0.014 0.020 69 71 46-87 3.38 20 Bromomethane 0.017 0.016 0.020 87 80 22-195 8.25 20 2-Butanone(MEK) 0.085 0.081 0.080 106 101 53-124 5.19 20 t-Butyl alcohol(TBA) 0.082 0.077 0.080 102 97 29-142 5.37 20 n-Butyl benzene 0.025 0.025 0.020 124 127 102-169 1.97 20 sec-Butyl benzene 0.025 0.025 0.020 124 127 100-166 2.79 20 tert-Butyl benzene 0.023 0.024 0.020 117 118 91-153 1.46 20 Carbon Disulfide 0.020 0.018 0.020 98 92 60-125 6.38 20 Carbon Tetrachloride 0.020 0.019 0.020 100 94 69-124 5.69 20 Chlorobenzene 0.019 0.019 0.020 95 96 73-116 1.05 20 Chloroethane 0.014 0.014 0.020 72 68 47-140 5.57 20 Chloroform 0.021 0.019 0.020 103 96 69-118 6.31 20 Chloromethane 0.014 0.013 0.020 69 64 30-132 7.76 20 2-Chlorotoluene 0.022 0.022 0.020 109 109 75-147 0 20 4-Chlorotoluene 0.021 0.021 0.020 104 106 75-137 1.78 20 Dibromochlorom ethane 0.016 0.016 0.020 81 82 57-105 0.613 20 1,2-Dibromo-3-chloropropane 0.0075 0.0074 0.010 75 74 36-103 1.09 20 1,2-Dibromoethane(EDB) 0.0090 0.0090 0.010 90 90 66-101 0 20 Dibromomethane 0.019 0.018 0.020 96 90 61-103 6.63 20 1,2-Dichlorobenzene 0.017 0.017 0.020 84 84 59-104 0 20 1,3-Dichlorobenzene 0.020 0.021 0.020 101 104 70-133 2.70 20 1,4-Dichlorobenzene 0.019 0.019 0.020 93 97 68-123 3.52 20 Dichlorodifluoromethane 0.0080 0.0080 0.020 40 40 13-107 0 20 1,1-Dichloroethane 0.020 0.019 0.020 100 93 69-118 6.43 20 1,2-Dichloroethane(1,2-DCA) 0.020 0.018 0.020 99 92 59-112 6.77 20 1,1-Dichloroethene 0.020 0.018 0.020 98 91 69-126 6.52 20 cis-1,2-Dichloroethene 0.020 0.019 0.020 99 93 69-116 6.08 20 trans-1,2-Dichloroethene 0.020 0.018 0.020 98 92 73-116 6.31 20 1,2-Dichloropropane 0.019 0.018 0.020 96 90 65-111 6.33 20 1,3-Dichloropropane 0.020 0.020 0.020 102 102 67-110 0 20 2,2-Dichloropropane 0.020 0.018 0.020 99 92 65-125 7.36 20 1,1-Dichloropropene 0.020 0.018 0.020 99 92 70-123 7.29 20 (Cont.) CA ELAP 1644•NELAP 4033ORELAP Page 20 of 29