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1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />?_ M c C a m iDb e I l Anal tical Inc. Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />"When Quality Counts rr http://www,mccampbell.com / E-mail: main@mccampbell.com <br />CA ELAP 1644 <br />Page 9 of 13 <br />QC Summary Report for E524.2 <br />Quality Control Report <br />Client: <br />AdvancedGeo, Inc. <br />WorkOrder: <br />2105883 <br />Date Prepared: <br />05/19/2021 <br />BatchlD: <br />221779 <br />Date Analyzed: <br />05/19/2021 <br />Extraction Method: <br />E524.2 <br />Instrument: <br />GC18 <br />Analytical Method: <br />E524.2 <br />Matrix: <br />Drinking Water <br />Unit: <br />µg/L <br />Project: <br />Mills Property <br />Sample ID: <br />MB/LCS/LCSD-221779 <br />CA ELAP 1644 <br />Page 9 of 13 <br />QC Summary Report for E524.2 <br />Analyte <br />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 <br />RPD <br />Limit <br />cis- 1,3-Dichloropropene <br />trans- 1,3-Dichloropropene <br />Diisopropyl ether (DIPE) <br />Ethylbenzene <br />3.74 <br />3.68 <br />4.09 <br />3.74 <br />3.69 <br />3.55 <br />4.12 <br />3.70 <br />4 <br />4 <br />4 <br />4 <br />93 <br />92 <br />102 <br />93 <br />92 <br />89 <br />103 <br />93 <br />70-130 <br />70-130 <br />70-130 <br />70-130 <br />1.25 <br />3.65 <br />0.697 <br />0.850 <br />20 <br />20 <br />20 <br />20 <br />Ethyl tert-butyl ether (ETBE) <br />3.97 <br />4.01 <br />4 <br />99 <br />100 <br />70-130 <br />1.08 <br />20 <br />Freon 113 <br />4.42 <br />4.60 <br />4 <br />110 <br />115 <br />70-130 <br />4.03 <br />20 <br />Hexachlorobutadiene <br />3.79 <br />3.59 <br />4 <br />95 <br />90 <br />70-130 <br />5.31 <br />20 <br />2-Hexanone <br />3.16 <br />2.82 <br />4 <br />79 <br />70 <br />70-130 <br />11.4 <br />20 <br />Isopropyl benzene <br />3.93 <br />3.77 <br />4 <br />98 <br />94 <br />70-130 <br />4.27 <br />20 <br />4 -Isopropyl toluene <br />3.81 <br />3.67 <br />4 <br />95 <br />92 <br />70-130 <br />3.65 <br />20 <br />Methyl -t -butyl ether (MTBE) <br />4.52 <br />4.53 <br />4 <br />113 <br />113 <br />70-130 <br />0.368 <br />20 <br />Methylene chloride <br />4.37 <br />4.36 <br />4 <br />109 <br />109 <br />70-130 <br />0.286 <br />20 <br />4-Methyl-2-pentanone (MIBK) <br />3.47 <br />3.44 <br />4 <br />87 <br />86 <br />70-130 <br />0.786 <br />20 <br />Naphthalene <br />4.21 <br />3.91 <br />4 <br />105 <br />98 <br />70-130 <br />7.45 <br />20 <br />n -Propyl benzene <br />3.76 <br />3.59 <br />4 <br />94 <br />90 <br />70-130 <br />4.68 <br />20 <br />Styrene <br />3.46 <br />3.28 <br />4 <br />86 <br />82 <br />70-130 <br />5.24 <br />20 <br />1,1,1,2 -Tetrachloroethane <br />4.03 <br />3.95 <br />4 <br />101 <br />99 <br />70-130 <br />2.07 <br />20 <br />1,1,2,2 -Tetrachloroethane <br />4.03 <br />3.85 <br />4 <br />101 <br />96 <br />70-130 <br />4.55 <br />20 <br />Tetrachloroethene <br />3.70 <br />3.70 <br />4 <br />92 <br />92 <br />70-130 <br />0.129 <br />20 <br />Toluene <br />1,2,3-Trichlorobenzene <br />3.86 <br />3.97 <br />3.84 <br />3.67 <br />4 <br />4 <br />97 <br />99 <br />96 <br />92 <br />70-130 <br />70-130 <br />0.549 <br />7.90 <br />20 <br />20 <br />1,2,4-Trichlorobenzene <br />3.88 <br />3.69 <br />4 <br />97 <br />92 <br />70-130 <br />4.99 <br />20 <br />1,1,1 -Trichloroethane <br />3.95 <br />4.01 <br />4 <br />99 <br />100 <br />70-130 <br />1.64 <br />20 <br />1,1,2 -Trichloroethane <br />4.19 <br />4.10 <br />4 <br />105 <br />102 <br />70-130 <br />2.18 <br />20 <br />Trichloroethene <br />4.17 <br />4.25 <br />4 <br />104 <br />106 <br />70-130 <br />1.89 <br />20 <br />Trichlorofluoromethane <br />4.34 <br />4.36 <br />4 <br />109 <br />109 <br />70-130 <br />0.453 <br />20 <br />1,2,4-Trimethylbenzene <br />3.87 <br />3.70 <br />4 <br />97 <br />93 <br />70-130 <br />4.33 <br />20 <br />1,3,5-Trimethylbenzene <br />3.90 <br />3.73 <br />4 <br />97 <br />93 <br />70-130 <br />4.37 <br />20 <br />Vinyl chloride <br />2.18 <br />2.21 <br />2 <br />109 <br />110 <br />70-130 <br />1.32 <br />20 <br />m,p-Xylene <br />7.82 <br />7.72 <br />8 <br />98 <br />97 <br />70-130 <br />1.31 <br />20 <br />o -Xylene <br />3.86 <br />3.71 <br />4 <br />96 <br />93 <br />70-130 <br />4.02 <br />20 <br />Surrogate Recovery <br />Dibromofluoromethane <br />25.6 <br />25.5 <br />25 <br />102 <br />102 <br />70-130 <br />0.340 <br />20 <br />Toluene -d8 <br />22.7 <br />22.6 <br />25 <br />91 <br />90 <br />70-130 <br />0.713 <br />20 <br />4 -BFB <br />2.77 <br />2.56 <br />2.5 <br />111 <br />102 <br />70-130 <br />7.94 <br />20 <br />CA ELAP 1644 <br />Page 9 of 13 <br />