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E ntech Analytical Labs, Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch 9 GBG2990624 Date Analyzed 06/24/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units n/L <br /> PARAMETER Method T MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> ggfL 49/L µgfl, ug(L % R AWL %R RPD %R <br /> 'Benzene ; 8020 1 <0 50 5- 0 1 ND 45 1 90 40 ; 80 11 1 ; 25 73-117 1 <br /> I 1 1 1 1 1 1 1 1 1 1 I <br /> 1 1 1 1 ! 1 1 1 1 1 ! <br /> ;Toluene ; 8020 ;4 <0 50 ; 250 ND ; 28 ; 111 ; 27 1; 107 3 8 ; 25 ; 78-122 <br /> ; 1 1 t 1 1 1 1 1 I Ethyl Benzene 8020 1; <0 50 50 ; ND 53 106 5 2 1; 105 1 .3 ; 25 1 77-114 <br /> 'Xylenes. 8020 <0 50 € 250 1 ND 29 116 1 28 113 1 25 25 l 79-120 <br /> l 1 <br /> Gasoline ' ' ' <br /> $015 � <50 0 S00 ; ND ; -1SS 98 ; 463 1 93 5 3 25 1; 75-€25 ; <br /> iaaa-TFT(SS)-PID 1 8020 100% 1010/0 99% 65-135 <br /> ;aaa-TFT(SS)-F1D ; 8015 ; 103% 103°a 102°'0 65-135 <br /> Vote LCS and LCSD results reported for the following Parameters <br /> 411 <br /> is <br /> Definition of Terms <br /> na Not Anal-,zed in QC batch <br /> MB Method Blank <br /> SA Spike Added <br /> SR Sample Result <br /> RPD(%) Duplicate Analysis- Relative Percent Difference <br /> SP Spike Result <br /> SP(%R) Spike% Recovery <br /> SPD Spike Duplicate Result <br /> SPD(%R) Spike% Recovery <br /> NC Not Calculated <br /> r <br />