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Entech Analytical Labs, Inc 525 Del Re-- Avenue, Suite E <br /> Sunnvrale, CA 94086 <br /> ' QUALITY CONTROL RESULTS SUMMARY <br /> ' METHOD Gas Chromatography <br /> Date Anal,-zed 09,09197 <br /> QC Batch# GBG5970909 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µg/l- <br /> E , F QC L[VATS <br /> [PARAMETER Method# MB SA SR SP SP ; SPD SPD RPD I (ADVI`�ORY) <br /> % R µs/L %R RPD I °/aR <br /> (Benzene 1 8020 I <0 5 I 10 I ND 1 98 I 98 I 108 1 108 I 96 I 25 1 50-150 i <br /> I <br /> :Toluene { 8020 : <0 5 : 10 I ND : 101 : 101 : 1 1 3 : 113 : 114 : 25 : 50-150 : <br /> ' :Ethyl Benzene 8020 I <0 5 i 10 1 ND i 100 1 100 1 11 1 111 1 10 9 1 25 I 50-150 <br /> 1 I I I I I I I I I I I I <br /> Xylenes I 8020 I <0 5 i 30 I ND I 30 i 100 i 34 I 113 I 12 5 1 25 I 50-150 <br /> Gasoline E 8015 <50 0 i 625 i ND i 586 94 i 578 92 1 4 25 i 50-150 <br /> v <br /> Definition of Tetras <br /> na Not Analyzed In QC batch <br /> MB Method Blank <br /> SA Spike Added <br /> ' SR Sample Result <br /> RPD(%) Duplicate Analvsis- 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 />