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r r • rQ UAL 1 T Y C O N T R O L R ESU L T 5 Job Number 992709 Report Date 01/06/2000 CUSTOMER IT Group PROJECT Southland - Martinez ATTN Rhonda Teicheira QC Type Description Reag Code Lab ID Dilution Factor Date Time rMSD Matrix Spike Duplicate 09120801 992702-1 01/06/2000 0923 Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result * Limits F Gasoline Range Petroleum Hydrocarbons 1708 1764 1000 0 874 83 50-150 3 2 30 CCV Continuing Calibration Verification 09120801 01/06/2000 1041 Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F Gasoline Range Petroleum Hydrocarbons 947 1000 0 95 $0-120 r Test Method EPA 80218 Batch 10428 Analyst evd Method Description Volatile Organics -Aromatics Units ug/L . ] LCS Laboratory Control Sample 09111502 01/04/2000 1642 Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F P V Benzene 50 05 50 100 1 34-150 Ethylbenzene 48 70 50 97 4 32-160 Methyl-t-Butyl Ether (MTBE) 230 42 250 92 2 50-150 Toluene 48 60 50 97 2 46-14B Xylenes (total) 155 11 150 103 4 75-125 [—L CD Laboratory Control Sample Duplicate 09111502 01/04/2000 170$ Parameter/Test Description OC Result OC Result True Value Orig Value Calc Result * Limits F Benzene 50 59 50 05 50 101 2 39-150 1 1 20 Ethylbenzene 49 37 4B 70 50 98 7 32-160 1 4 20 ,Met1yL-t-Bu1yL Ether (MTBE) 254 31 230 42 250 101 7 50-150 9 9 25 Toluene 49 34 48 60 50 98.7 46-148 1 5 20 Xylenes (total) 158 02 155 11 150 105 3 75-125 1 9 20 MB Method Blank I 01/04/2000 1800 ' Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result * Limits F Benzene 0 00 Ethylbenzene 0 00 1 Methyl-t-Butyl Ether (MTBE) 0 00 Toluene 0 00 nes (total) 0 00 , it 'I if Page 8 * %_% REC, R=RPD, A=ABSIDiff D=% Diff I II t