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COU <br /> ' LAS CORE LABORATORIES <br /> RIES <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 DiLutton FactorDate Time <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 /> ' 1,1-Dichtoroethane 8 70 8 02 10 000000 0 87 0 66-126 <br /> 8 22 <br /> Toluene 9 01 8 87 10 000000 0 90 1 72-132 <br /> 2 21 <br /> ' Trichloroethene 9 24 9 32 10 000000 0 92 4 74-134 <br /> 1 24 <br /> ' Test Method EPA 82606 Batch 6467 Analyst am <br /> Method Description Volatile Organics (Client List) Units ug/L <br /> ' LCS Laboratory Control Sample 09042404 _ 05/27/1999 1507 <br /> Parameter/Test Description QC Result QC Result True Value prig Value Calc Result * Limits <br /> Benzene 10 96 10 000000 109 6 67-127 <br /> %,Lch[orcetheno <br /> orobenzene 9 99 10 000000 99 9 68-128 <br /> Dichloroethane 7 01 10 000000 70 1 66 126 <br /> uene l0 99 10 000000 109 9 72-132 <br /> 10 85 10 000000 108 5 74-134 <br /> MB Method Blank 05/27/1999 1549 <br /> Parameter/Test Description QC Result QC Result True Value Oris Value Calc Result * Limits <br /> Aratein 11 38 — <br /> rylonitrtle 0 <br /> Acetone 7 34 <br /> Benzene 0 <br /> Bromobenzene 0 <br /> Bromochtoromethane C <br /> BromodichLoromethane 0 <br /> Bromoform 0 <br /> ' Bromomethane 0 <br /> Methyl-t-Sutyl Ether (MTBE) 0 28 <br /> Methyl ethyl ketone (2 Butanone) 1 51 <br /> n-Butylbenzene 0 <br /> sec-Butylbenzene 0 <br /> tert ButyLbenzene 0 <br /> Carbon disulfide 0 52 <br /> Carbon tetrachloride (Freon 10) 0 <br /> Chlorobenzene 0 <br /> ' Chloroethane 0 <br /> 2-Chloroethytvinyl ether 0 <br /> Chloroform 0 <br /> Chloromethane 0 <br /> 2-Chlorotoluenc 0 <br /> 4-Chlorotoluene 0 <br /> Dibromochloromethane 0 <br /> 1,2-Dibromoethane (LDB) 0 <br /> Dibromo-3 chloropropane 0 <br /> omomethane 0 <br /> Page 35 <br /> * /_/ REC, R=RPD, A=ABS Diff D=/ Diff <br />