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ntech Analytical Labs, Inc 525 Del Rev Avenue,Suite E <br /> Sunnvvale CA 94086 <br /> QUALITY CONTROL R-ESLLTS SUMMARY <br /> VIET1-IOD Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch# WGC4000210 Date Analyzed 02/10/00 <br /> Matrix Liquid Quality Con-of Sample Blank Spike <br /> Units �LWLitcr <br /> tPARANIETER Method= NIB SA SR SP SP SPD SPD % QC LIMITS <br /> µg/Liter ;tg/Liter µg/Liter Ii,-Liter % R pg/Liter %R RPD ', RRD %R <br /> :Benzene 802U <0 50 4 7 ND 5 1 110 48 103 6 2 25 70-130 <br /> ;Toluene 8020 <0 50 29 LD 30 103 30 102 1 4 25 ; 70-130 <br /> Ethyl Benzene 8020 <0 50 5 5 N D 5 8 105 ; 5 4 98 6 3 ; 25 70-130 <br /> Xylenes 1 8020 1 <0 50 32 1 ND 33 1106 33 � 103 1 2 6 25 � 70-130 <br /> :Gasoline 1 8015 1 <50 0 1 467 1 ND � 459 � 98 � 440 � 94 1 4 2 25 70-130 <br /> ;aaa-TFT(SS)-FID ; 3020 114% 109% 105% 65-135 <br /> ;aaa-TFT(SS)-PID 8015 103,10 107% 98% 65-135 <br /> I <br /> definition of Terms <br /> na Not Analvzed 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 />