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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento 0 583 <br /> 94 <br /> (9 t 6)9221-960p <br /> 1 4 FAX(9 16)921-0 100 <br /> I)— Analytical www sequolalabs corn <br /> 1WF 0 <br /> SECOR International - Rancho Cordova Project ARCO 2133, Stockton,CA <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 09/10/01 14 56 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Ruporli% Spike Source %REC RPD <br /> Analyte Result Limit UMS Level Result %REC Limits RPD Limit Notes <br /> Batch 1090033- EPA 5030B (P/T) <br /> Blank(1090033-BLKI) Prepared&Analyzed 09/04/01 <br /> Purgeable Hydrocarbons ND 50 ugJl <br /> Benzene ND 050 <br /> toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND -- --2-5 - - --- _ ----- --- —F <br /> Surrogate a a a-Trifluorotoluene 857 100 857 60 140 <br /> LCS(1090033-BSI) _ _ -_ --- _m __Prepared&Analyzed 09/04/01---- <br /> Benzene <br /> 9/04/01 _-Benzene 106 050 ug/1 10 0 106 70-130 <br /> Toluene 9 52 050 100 95 2 70-130 <br /> Ethylbenzene 961 050 100 96 1 70-130 <br /> Xylenes(total) 279 050 300 93 0 70-130 <br /> Methyl ten-butyl ether 943 25 100 943 70-130 <br /> Surrogate aaa-Tr ftuormoluene 8 17 - 100 81 7 60-140 <br /> -=Matrix SPjtke(1090033-MS1) ____ Source S108411=01 -- Prepared&Analyzed 09/04/01 - -- <br /> Benzene 936 0 50 ug/1 10 0 ND 93 6 60-140 <br /> Toluene 8 53 -0 50 10 0 ND 85 3=60-140 <br /> Ethylbenzene 873 050 10 0 ND 873 60-140 <br /> Xylenes(total) - - - - 253 - 0 5o _ - 300 ND --- 84 3 - 60-140- - <br /> Methyl tett-butyl ether 110 2 5 100 ND 110 60-140 — <br /> Surrogate aaa-TriJluorotoluene mm 744 100 744 60-140 <br /> Matrix Spike Dup(1090033-_MSD_I) _Source S_108411_-01 Prepared&Analyzed 09/04/01 <br /> Benzene 10 9 050 ug11 100 ND 109 60-140 15 2 25 <br /> Toluene 992 050 100 ND 992 60-140 151 25 <br /> Ethylbenzene 101 050 100 ND 101 60-140 146 25 <br /> Xylenes(total) 292 050 300 ND 973 60-140 14 3 25 <br /> Methyl tent-butyl ether 1 1 0 25 t 0 0 ND 110 60-140 000 25 <br /> Surrogate a a a-Trtuorotoluene 897 100 897 60-140 <br /> Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of 13 <br />