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McCampbell Analytical, Inc. ‘^.14e "When Quality Counts" 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: main@mccampbell.com Quality Control Report Client: Atlas Technical Consultants Date Prepared: 02/18/2021 Date Analyzed: 02/18/2021 Instrument: GC48 Matrix: Soil Project: 91-57962-PW; FUHSD WorkOrder: 2102A42 BatchID: 215584 Extraction Method: SW3550B Analytical Method: SW8270C Unit: mg/Kg Sample ID: MB/LCS/LCSD-215584 QC Summary Report for SW8270C Analyte LCS Result LCSD Result SPK Val LCS %REC LCSD %REC LCS/LCSD Limits RPD RPD Limit 1,1-Biphenyl 0.0543 0.0531 0.062 87 85 60-130 2.23 30 1,2,4-Trichlorobenzene 1.12 1.10 1.25 89 88 60-130 1.63 30 1,2-Dichlorobenzene 1.01 1.03 1.25 81 82 60-130 1.85 30 1,2-Diphenylhydrazine 1.11 1.05 1.25 89 84 60-130 5.98 30 1,3-Dichlorobenzene 1.04 1.03 1.25 83 82 60-130 0.911 30 1,4-Dichlorobenzene 0.870 0.949 1.25 70 76 60-130 8.66 30 1-Methylnaphthalene 0.0530 0.0496 0.062 85 79 70-130 6.59 30 2,3,4,6-Tetrachlorophenol 1.09 1.09 1.25 87 87 60-130 0.186 30 2,4,5-Trichlorophenol 0.0544 0.0544 0.062 87 87 60-130 0.160 30 2,4,6-Trichlorophenol 0.0526 0.0520 0.062 84 83 60-130 0.997 30 2,4-Dichlorophenol 0.0570 0.0529 0.062 91 85 60-130 7.42 30 2,4-Dimethylphenol 1.12 1.07 1.25 90 86 70-130 4.32 30 2,4-Dinitrophenol 0.455 0.500 1.25 36 40 15-130 9.38 30 2,4-Dinitrotoluene 0.0532 0.0538 0.062 85 86 70-130 0.991 30 2,6-Dinitrotoluene 0.0534 0.0527 0.062 86 84 60-130 1.39 30 2-Chloronaphthalene 1.19 1.14 1.25 95 91 60-130 4.73 30 2-Chlorophenol 0.0592 0.0582 0.062 95 93 60-130 1.65 30 2-Methylnaphthalene 0.0531 0.0498 0.062 85 80 70-130 6.42 30 2-Methylphenol (o-Cresol) 1.20 1.30 1.25 96 104 60-130 8.57 30 2-Nitroaniline 5.76 5.85 6.25 92 94 70-130 1.61 30 2-Nitrophenol 6.04 5.78 6.25 97 92 70-130 4.44 30 3 & 4-Methylphenol (m,p-Cresol) 1.14 1.15 1.25 91 92 60-130 1.08 30 3,3-Dichlorobenzidine 0.0399 0.0377 0.062 64 60 40-130 5.54 30 3-Nitroaniline 4.46 4.65 6.25 71 74 50-130 4.22 30 4,6-Dinitro-2-methylphenol 3.92 3.93 6.25 63 63 20-130 0.275 30 4-Bromophenyl Phenyl Ether 1.14 1.11 1.25 91 89 60-130 2.81 30 4-Chloro-3-methylphenol 1.06 0.994 1.25 85 80 70-130 6.41 30 4-Chloroaniline 0.0322 0.0315 0.062 52 50 40-130 2.31 30 4-Chlorophenyl Phenyl Ether 1.07 1.06 1.25 86 84 70-130 1.72 30 4-Nitroaniline 5.00 5.08 6.25 80 81 60-130 1.69 30 4-Nitrophenol 3.50 3.40 6.25 56,F2 54,F2 60-130 2.90 30 Acenaphthene 0.0515 0.0500 0.062 82 80 60-130 2.86 30 Acenaphthylene 0.0534 0.0523 0.062 85 84 60-130 2.03 30 Acetochlor 1.05 0.999 1.25 84 80 60-130 4.70 30 Anthracene 0.0561 0.0528 0.062 90 84 60-130 6.08 30 Benzidine 1.46 1.51 6.25 23 24 20-130 3.40 30 Benzo (a) anthracene 0.0551 0.0525 0.062 88 84 70-130 4.82 30 Benzo (a) pyrene 0.0552 0.0530 0.062 88 85 70-130 3.98 30 (Cont.) CA ELAP 1644 • NELAP 40330RELAP Page 54 of 68