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ntech Analytical Labs, Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> I Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch# WGCMS990807 Date analyzed 08/07199* <br /> Matrix Water Spiked Sample Blank Spike <br /> Units ug/L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> µg/L µg/L µg/L %R 1182 %R RPD ; %R <br /> 11-Dichloroethene ; 8240/8260 ; 25 ; ND 1 26 ; 102 ; 28 ; 110 ; 7 9 ; 25 ; 50-150 <br /> Methyl-tert-buryl ether 8240/8260 25 ND 32 130 27 108 185 25 50-150 ; <br /> I , <br /> :Benzene 8240/8260 25 ND 27 107 28 112 44 25 50-150 1 <br /> 'Trichloroethene ' 8240/8260 ' 25 ND 28 111 ' 29 1 114 1 2 8 25 1 50-150 <br /> , <br /> 1Toluene 1 8240/8260 25 ' ND 1 26 106 ' 29 1 114 1 90 25 50-150 1 <br />' , <br /> 1Chlorobenzene 8240/8260 25 ND 1 27 109 29 I 115 5 7 I 25 50-150 <br /> 'Surrogates <br /> ;Dibromofluoromethane ' 8240/8260 ' ' 94% 1 108% ' 99% ' ' ' 65-135 ' <br /> (MTBE-d3 ' 8240/8260 ' ' 94% ' 118% 1 1 98% ' I ' 1 <br /> (Toluene-d8 8240/8260 1 ' 101% ' 98% 1 101% I 65-135 <br /> ' 8240/8260 93% 97% 1 98% 1 65-135 <br /> 4-Sromofluorobenzene , <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 /> r� <br />