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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# GBG2990403 Date Analyzed 04/03/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units V91L <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> ' pg/L pg/L 4g/L pg/L % R 3083 %R RPD 1 %R <br /> Menzene 8020 <0 50 40 ND 1 35 1 89 1 37 1 92 1 42 1 25 1 81-115 I <br /> `Toluene8020 0 50 40 ND 37 93 38 94 1 4 25 1 82-114 <br /> 1 I 1 < 1 1 1 I 1 I 1 I 1 l <br /> 4 1 1 1 1 1 1 1 1 1 1 1 I <br /> ;Ethyl Benzene 8020 <0 50 40 ND 1 36 90 36 90 02 25 81-115 <br /> I <br /> 'Xylenes 1 8020 <0 50 120 ND 111 93 114 95 1 24 I 25 1 84-114 1 <br /> 1 Y ! 1 1 1 1 1 1 1 1 1 1 1 <br /> `Gasoline 1 8015 <50 D 1 500 ND 427 85 436 137 1 2 1 25 1 75-125 ` <br /> 1 1 I 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 I 1 1 1 <br /> Note LCS and LCSD results reported for the following Parameters <br /> All <br /> Definition of Terms <br /> na Not Analyzed 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 /> 1 <br /> 1 <br />