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Sequoia 819 Avenue, S <br /> Sacramento, <br /> 958mento, CA 95$34 <br /> (916) 921-9600 <br /> Analytical FAX(9]6) 921-0100 <br /> SECOR Intemational-Sacramento Project ARCO 2093,Tracy,CA Sampled 9/16/99 <br /> 9912 Business Park Dr,Ste 100 Project Number 07141944 005 Received 9/21199 <br /> er <br /> Sacramento CA 95827 Prolcet Mane Rusty Benkos Re orted 1015199 <br /> Total Purgeable Hydrocarbons(C&02),BTEC and MTBE by DHS LUF1;/Qu3lity Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Reco-- RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank continued 90902 2-BLK1 <br /> Surrogate a a a-Trlfluorotoluene 9/24199 10 0 9 G3 ug/l 600-140 963 <br /> !&k 9092232-BSI <br /> Benzene 9124199 10 0 9 54 ug/l 700-130 954 <br /> Toluene 10 0 9 24 700-130 924 <br /> Ethylbenzcne 10 0 9 19 700-130 919 <br /> Xylenes(total) " 300 273 " 700-130 910 <br /> Methyl tert-butyl ether 10 0 893 r 700-130 893 <br /> Surragare a,a,a-Trcfluorotoluene 100 980 600-140 98 0 <br /> Matrix Spike919( 0282,-MS1 $909306-04 <br /> Benzene 9/24199 10 0 ND 947 ug/I 60 0-140 94 7 <br /> Toluene 100 ND 9 15 600-140 91.5 <br /> E lben2ene " 10 0 ND 925 600-140 92S <br /> S(tow) 30 0 ND 27 6 60 0-140 92.0 <br /> I tert butyl ether 100 ND 109 " 600-140 109 <br /> Surrogate a,a,a-Trr1luorotoluene " 100 940 60 0 140 94 0 <br /> Matrix Spike Dup 9090282-M D1 S909306-04 <br /> Beaune 9124199 too ND 943 ugll 60 0-140 94 3 25 0 0.423 <br /> Toluene " too ND 9 11 60 0-140 91.1 250 0.438 <br /> Ethvibenzene 10 0 ND 9 21 600-140 921 250 0 433 <br /> Xylenes(total) 300 ND 277 600-140 92 3 250 0 326 <br /> Methyl tent-butyl ether 100 ND 114 600-140 114 250- 449 <br /> Surrogate a,a,a-Trsfluororoluene J00 915 60 0-140 91.5 <br /> swqwis Analytical-Sacramento •Refer to end of report for text of notes and def nihons <br /> page 6 of 7 <br /> OT/8 d Dus/uI0f103S Wd00 SO 66, ST (SON <br />