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1 <br /> 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 /> OC Type Description Reag Code Lab ID Dilution Factor Date Ttme <br /> ' MS Matrix Spike 09042404 990877-21 05/27/1499 2147 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> ' Benzene 12 10 10 000000 4 74 73 6 67-127 <br /> Chlorobenzene 13 15 10 000000 4 92 82 3 68-128 <br /> 1,1-Dichloroethane 8 02 10 000000 0 80 2 66-126 <br /> Toluene 8 87 10 000000 0 88 7 72-132 <br /> ' Trichloroethene 9 32 10 000000 0 93 2 74-134 <br /> MSD Matrix Spike Duplicate 09042404 990877-21 05/27/1999 2230 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> Benzene 12 28 12 10 10 000000 4 74 75 4 67-127 <br /> ' 1 21 <br /> Chlorobenzene 13 60 13 15 10 000000 4 97 86 8 68 128 <br /> 3 21 <br /> 1,1 Dichloroethane 8 70 8 02 10 D00000 D 87 0 66-126 <br /> a 22 <br /> Toluene 9 01 a 81 10 000000 0 90 1 77 132 <br /> 2 21 <br /> chloruethere 9 24 9 32 10 000000 0 92 4 74 134 <br /> 1 24 <br /> ' Test Method EPA 82608 Batch 6477 Analyst am <br /> Method Description Volatile Organics (Client List) Units ug/L — —-� <br /> ' MS Matn x Spike 09042404 990856-5 05/25/1999 2136 <br /> Parameter/Test Description QC Result OC Result True Value Orig Value Calc Result Limits <br /> Benzene 10 09 10 000000 0 100 9 67-127 <br /> Chlorobenzene 10 25 10 000000 0 102 5 68-128 <br /> 1,1 Dichloroethane 12 10 10 000000 0 73 113 7 66-126 <br /> Toluene 10 39 10 000000 0 39 100 0 72-132 <br /> ' in chloroethene 10 03 10 000000 0 100 3 74-134 <br /> MSD Matrix Spike Duplicate 09042404 990856-5 05/25/1999 2219 <br /> ' Parameter/Test Description QC Resutt CC Result True Value Orig Value Calc Result * Limits <br /> Benzene 10 11 10 09 10 000000 0 101 1 67-127 <br /> 0 11 <br /> ' Chlorobenzene 10 29 10 25 10 000000 0 102 9 68 128 <br /> 0 13 <br /> 1,1-DiehlOroethane 11 99 12 10 10 000000 0 73 112 6 66 126 <br /> 1 14 <br /> Toluene i0 42 10 39 10 000000 0 30 100 3 72-132 <br /> 10 13 <br /> Trichloroethene 9 87 10 01 10 000000 0 98 7 74-134 <br /> 2 14 <br /> Page 37 <br /> " /-% REC, R=RPD A=ABS Diff D=/ Diff <br />