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Entech 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# GBG5970624 Date Analyzed 06/24/97 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µL / <br /> QC LIMITS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> Pg/1- Vg/L Rg/L %R µ8/L %R RPD I %R <br /> (Benzene 1 8020 Ti —05 1 25 I ND r 246 1 98 I 25 5 1 102 1 34 1 25 I 50-150 1 <br /> 1 1 I I I I 1 I 1 E f I I <br /> 1Toluene 1 5020 1 <0 5 r 25 1 ND 1 26 a 1 104 r 278 1 111 1 66 � 25 I 50-150 I <br /> :Ethyl Benzene E 8020 r <0 5 r 25 1 ND { 239 1 96 r 248 1 99 I 38 1 25 E 50-150 I <br /> I r r 1 I 1 1 I I i E E <br /> Xylenes I 8020 1 <0 5 1 75 E ND 1 68 r 91 I 71 I 95 I 43 E 25 1 50-150 1 <br /> GasolineI 1 1 I I I I I I 1 I I <br /> I 8015 � <50 0 r 625 I ND I 628 I 100 1 614 1 98 E 23 I 25 I 50-150 I <br /> • <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> MB Method BIank <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 />