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Q UAL E T Y C O N T R O L R ESU L T 5 <br /> Job Number 992710 Report Date 01/06/2000 <br /> CUSTOMER ET Group PROJECT Southland - Martinez ATTN Rhonda Teicheira <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> CV ECa:Li:b:ra�ton Ver ifica#ion <br /> 09111501 01/06/2000 0227 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> 49 99 85-115 <br /> enzene 49 50 97 85-115 <br /> thylbenzene 48 47 70-130 <br /> Methyl-t-Butyl Ether (MTBE) 253 58 250 101 <br /> 50 100 85-115 <br /> Toluene 49 86 <br /> Toluene <br /> (total) 151 42 150 101 85-115 <br /> LC5 Laboratory Control Sample 09111502 01/06/2000 0845 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 50 47 50 100 9 39-150 <br /> thylbenzene 48 82 50 97 6 32-160 <br /> ethyl t-Butyl Ether (MTBE) 279 88 250 112 0 50-150 <br /> oluene 51 43 50 102 4 46-148 <br /> t <br /> (total) 154 69 150 103 1 75-125 <br /> Laboratory Control Sample Duplicate 09111502 01/06/2000 0830 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> r�Benzene <br /> 50 17 50 47 50 100 3 39-150 <br /> ** 0 6 20 <br /> Ethylbenzene 48 51 48 82 50 97 0 6 32-160 <br /> 6 20 <br /> ethyl-t-Butyl Ether (MTBE) 252 78 279 88 250 101 1 50-150 <br /> 10 2 25 <br /> Toluene 51 41 51 43 50 102 8 46-148 <br /> 0 0 20 <br /> ylenes (total) 153 14 154 69 150 102 1 75-125 <br /> 1 1 0 20 <br /> Ms Matrix Spike 09111501 992702-1 01/06/2000 1015 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 63 82 50 15 15 97 3 39-150 <br /> IthyLbenzene 52 06 50 2 56 99 0 32-160 <br /> ethyl-t-Butyl Ether (MTBE) 1161 26 250 1043 52 47 1 50-150 K <br /> Toluene 51 96 50 3 73 96 5 46-148 <br /> xylenes (total) 166 68 150 11 83 103 2 75-125 <br /> CV Calibration Verification 09111501 01/06/2000 1107 <br /> Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 50 61 50 101 85-115 <br /> E lbenxene 49 47 50 99 85-115 <br /> l-t-Butyl Ether (MTBE) 245 42 250 98 70-130 <br /> ne 51 10 50 102 85-115 <br /> O <br /> xylenes (total) 154 37 150 103 85-115 <br /> Page 10 * =% REC, R=RPD, A=ABS Diff , D=% Diff <br />