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t COULAB CORE LABORATORIES <br /> Q U A L I T Y C 0 N T R 0 L R E S U L T S <br /> Job Number 990877 Report Date 05/31/1999 <br /> ' CUSTOMER IT Group PROJECT Southland - Martinez ATTN Shelby Lathrop <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> ' MB Method Blank 05/28/1999 1848 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> 1,1-Dichloroethane 0 <br /> 1,2 Dichloroethane 0 <br /> 1,1-Dichloroethene 0 <br /> ' cis-1,2-DschLoroethene 0 <br /> trans-1,2-Dichloroethene 0 <br /> 1,2-Dichloropropane 0 <br /> cis-1,3-D>ichLoropropene 0 <br /> trans-1,3-Dichloropropene 0 <br /> ' 1,3-Dichloropropane D <br /> 2,2-Dichloropropane 0 <br /> 1,1-DichLoropropene D <br /> Lthylbenzene 0 <br /> ' Hexachlorobutadiene 0 <br /> 2-Mexanone 0 <br /> Iodomethane 0 <br /> Isopropylbenzene 0 <br /> p Isopropyltoluene 0 <br /> Methylene chloride 0 <br /> ethyl-2-pentanore (MIRK) 0 <br /> �hthalene 0 <br /> Propylbenzene 0 <br /> ' Styrene 0 <br /> 1,1,1,2-7etrachforoethane 0 <br /> 1,1,2,2-Tetrachloroethane. 0 <br /> Tetrachloroethene 0 <br /> Toluene 0 <br /> 1,2,3-Trichloroberizene C <br /> 1,2,4-Trichlorobenzene 0 <br /> 1,1,1-Trichloroethane C <br /> 1,1,2-Trichloroethane 0 <br /> ' Trichloroethene 0 <br /> Trichlorofluoromethane (Freon 11) 0 <br /> 1,1,2-Trichlorotrifluoroethane(Freonll3) 0 <br /> 1,2,3-Trichloropropane 0 <br /> 1,2,4-Trimethylbenzene 0 <br /> 1,3,5-Trimethylbenzene 0 <br /> Vinyl acetate 0 <br /> Vinyl chloride 0 <br /> m&p-xylenes 0 <br /> ne <br /> Tetrah0 <br /> etrahydrofuran 0 <br /> M5 Matrix Spike 09042404 990912-3 05/29/1999 0028 <br /> Parameter/Test Description QC Result OC Result True Value Orig Value Calc Result * Limits <br /> Benzene 10 86 10 000000 0 108 6 67-127 <br /> Chlorobenzene 10 43 10 000000 0 104 3 68-128 <br /> 1,1 Dichloroethane 11 01 10 000000 0 110 1 66-126 <br /> Toluene 10 82 10 000000 0 108 2 72-132 <br /> Trichloroethene 11 07 10 000000 0 110 7 74-134 <br /> Page 41 <br /> " /=/ RLC, R=RPD A-ABS Diff D=/ Diff <br />