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IEntech Analytical Labs, Inc 525 Del Rey Ave, Suite E <br /> i Sunnyvale, CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> Volatile Organic Compounds <br /> QC Batch# WGCMS990128 Date analyzed- 01/28/99 <br /> Matrix Water Spiked Sample Blank Spike <br /> Units ggfL <br /> 1 1 <br /> I PARAMETER Method# : SA SR t SP SP SPD SPD t RPD QC LIMITS <br /> pg/L µg/L µg/L %R µg/L %R - RPD 1 %R <br /> 1 I-Dichloroethene 8240/8260 25 1 ND 24 1 94 1 24 97 1 25 1 25 1 50-150 1- <br /> 1 � 1 <br /> 1 1 1 1 ! 1 , 1 1 <br /> 'Methyl-tert-butyl ether 1 8240/82601 1 1 25 1 ND 1 31 1 124 ' 31 1 126 1 1 3 ' 25 1 50-150 1 <br /> 1 1 1 1 1 1 1 E 1 1 1 1 <br /> 'Benzene 18240182601 25 1 ND 1 26 1 103 1 25 1 10116 1 25 1 50-150 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 <br /> 1lTnchloroethene 1 8240/82601 25 1 ND 1 30 1 119 1 29 1 115 1 34 1 25 1 50-150 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 <br /> I 'Toluene ' 824018260; 25 ND 29 1 114 ' 28 ' 110 1 36 11 25 1 50-150 ' <br /> 1 i 1 t 1 1 1 1 i 1 1 I <br /> 1Chlorobenzene 1824018260; 25 1 ND 1 26 1 104 1 25 1 100 1 31 1 25 1 50-150 1 <br /> 1 1 1 1 1 1 1 1 1 1 i i <br /> 1 1 1 1 1 t 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 i <br /> 1 1 1 1 1 S 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 f 1 1 <br /> / 1 <br /> I <br /> Definition of Terms <br /> ria Not Analyzed in QC batch <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 Duplicate%Recovery <br /> NC Not Calculated <br /> • <br /> 1 - - <br />