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Alpha Scientific Corporation <br /> Environmental Laboratories <br /> 12-03-2019 <br /> EPA 8260B <br /> Batch QA/QC Report <br /> Client: Advanced GeoEnvironmental, Inc Lab Job No: AE911080 <br /> Project: DBL Rentals Property <br /> Matrix: Soil Lab Sample I.D.: P1911075-1 <br /> Batch No: 1126-VOAS1 Date Analyzed: 11-26-2019 <br /> I.MS/MSD Report <br /> Unit: ppb <br /> Analyte Sample Spike MS MSD MS MSD %RPD %RPD %Rec <br /> Conc. Conc. %Rec. %Rec. Accept. Accept. <br /> Limit Limit <br /> 1,1- ND 20 20.9 19.8 104.5 99.0 5.4 30 70-130 <br /> Dichloroethene <br /> Benzene ND 20 22.9 21.2 114.5 106.0 7.7 30 70-130 <br /> Trichloro- ND 20 23.9 21.4 119.5 107.0 11.0 30 70-130 <br /> ethene <br /> Toluene ND 20 22.5 20.3 112.5 101.5 10.3 30 70-130 <br /> Chlorobenzene ND 20 22.7 20.4 113.5 102.0 10.7 30 70-130 <br /> II.LCS Result <br /> Unit: ppb <br /> Analyte LCS Value True Value Rec.% Accept. Limit <br /> 1,1-Dichloroethene 16.7 20.0 83.5 80-120 <br /> Benzene 20.2 20.0 101.0 80-120 <br /> Trichloro-ethene 21.7 20.0 108.5 80-120 <br /> Toluene 19.7 20.0 98.5 80-120 <br /> IL Chlorobenzene 20.1 20.0 100.5 80-120 <br /> ND: Not Detected(at the specified limit). <br /> 16760 Gridley Road,Cerritos, CA 90703 11 Phone(562) 809-8880 Asc90703@gmailxom <br />