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l 1534 Willow Pass Road,Pittsburg,CA 94565-1701 M c C a m p b e I l Analytic al, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 "When Quality Countsrr http://www.mccanTbell.com/E-mail:main@mccmVbell.com Quality Control Report Client: GHD Services,Inc. WorkOrder: 1910581 Date Prepared: 10/11/19 BatchID: 186992 Date Analyzed: 10/15/19 Extraction Method: SW5030B Instrument: GC16 Analytical Method: SW8260B Matrix: Soil Unit: mg/kg Project: 11202858-07.11;Chevron 372736-UDC Removal Sample ID: MB/LCS/LCSD-186992 1910581-003AMS/MSD QC Summary Report for SW8260B Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD Result Result Val %REC %REC Limits Limit Surrogate Recovery Dibromofluoromethane 0.10 0.10 0.12 83 82 66-112 0.992 20 Toluene-d8 0.14 0.14 0.12 113,F3 112,F3 92-109 1.64 20 4-BFB 0.010 0.010 0.012 82 83 72-112 0.561 20 Benzene-d6 0.097 0.092 0.10 97 92 81-126 5.27 20 Ethyl benzene-d10 0.13 0.13 0.10 135 133 92-138 1.47 20 1,2-DCB-d4 0.075 0.071 0.10 75 71 68-108 5.04 20 Analyte MS MS MSD SPK SPKRef MS MSD MS/MSD RPD RPD DF Result Result Val Val %REC %REC Limits Limit Acetone 1 0.17 0.17 0.20 ND 84 87 48-114 4.27 20 tert-Amyl methyl ether(TAME) 1 0.013 0.013 0.020 ND 66 66 44-94 0 20 Benzene 1 0.015 0.015 0.020 ND 73 74 50-115 1.37 20 Bromobenzene 1 0.014 0.014 0.020 ND 69 68 60-114 1.06 20 Bromochloromethane 1 0.013 0.014 0.020 ND 66 68 50-113 3.40 20 Bromodichloromethane 1 0.013 0.013 0.020 ND 65 66 46-109 2.13 20 Bromoform 1 0.0075 0.0089 0.020 ND 38 45 38-83 16.7 20 Bromomethane 1 0.014 0.014 0.020 ND 70 70 10-149 0 20 2-Butanone(MEK) 1 0.056 0.058 0.080 ND 71 72 46-111 2.66 20 t-Butyl alcohol(TBA) 1 0.052 0.051 0.080 ND 65 63 32-112 1.81 20 n-Butyl benzene 1 0.024 0.023 0.020 ND 118 117 71-156 1.31 20 sec-Butyl benzene 1 0.021 0.021 0.020 ND 103 103 28-190 0 20 tert-Butyl benzene 1 0.016 0.017 0.020 ND 79 83 69-145 5.57 20 Carbon Disulfide 1 0.014 0.014 0.020 ND 70 70 19-135 0 20 Carbon Tetrachloride 1 0.014 0.014 0.020 ND 69 69 51-120 0 20 Chlorobenzene 1 0.014 0.014 0.020 ND 68 70 63-108 2.93 20 Chloroethane 1 0.015 0.016 0.020 ND 77 78 40-122 2.24 20 Chloroform 1 0.015 0.015 0.020 ND 73 74 55-114 1.94 20 Chloromethane 1 0.015 0.016 0.020 ND 77 78 14-128 1.90 20 2-Chlorotoluene 1 0.016 0.016 0.020 ND 82 82 45-153 0 20 4-Chlorotoluene 1 0.016 0.016 0.020 ND 80 82 65-126 2.69 20 Dibromochloromethane 1 0.012 0.012 0.020 ND 60 62 48-97 3.80 20 1,2-Dibromo-3-chloropropane 1 0.0061 0.0062 0.010 ND 61 62 32-95 0.913 20 1,2-Dibromoethane(EDB) 1 0.0067 0.0068 0.010 ND 67 68 52-99 2.28 20 Dibromomethane 1 0.013 0.013 0.020 ND 63 64 50-100 1.31 20 1,2-Dichlorobenzene 1 0.013 0.013 0.020 ND 64 64 38-116 0 20 (Cont.) CA ELAP 1644•NELAP 4033ORELAP Page 56 of 72