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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> 4 a- ) (916)921 <br /> 1-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> rF <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 /> Reporting Spike Source %REC RPD <br /> LA,,1}11. Result I omit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090037 - EPA 5030E(P/T) <br /> Blank(1090037-BLKI) _ Prepared&_Ana1_y_z_ed 09/04_/01 <br /> Purgeable Hydrocarbons ND 50 ug/1 � <br /> Benzene ND 0 50 <br /> Toluene ND 0 50 " <br /> t-thylbenzene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Methyl Cert-butyl ether ND 2 5 <br /> Surrogate a a a-Trifluorotoluene 992 J 100 992 60-140 <br /> LCS(1090037-BS1) - _ _ Prepared&Analyzed 09/04/01 <br /> Benzene 8 17 0 50 ug/l 100 81 7 70-130 <br /> toluene 931 0 50 100 93 1 70-130 <br /> nzene 101 0 50 100 101 70-130 <br /> es(total) 305 0 50 300 102 70-130 <br /> Methyl tert-butyl ether 858 2 5 100 85 8 70-130 <br /> Surrogate a a a-Trifluorotoluene _ 10 4 100 104 60-140 <br /> L.CS Dup(1090037-BSD1) _ _ _Prepared&Analyzed 09104/01 _ <br /> Benzene 11 1 0 50 ug/l 100 111 70-130 304 25 QR-02 <br /> Toluene 103 0 50 100 103 70-130 10 1 25 <br /> Ethylbenzene 102 050 " 10 0 102 70-130 0 985 25 <br /> Xylenes(total) 31 4 0 50 300 105 70-130 291 25 <br /> Methyl ten-butyl ether W 6 2 5 100 106 70-130 21 1 25 <br /> Surrogate aaa-Trifluorotoluene 101 " 100 101 60-140 <br /> Batch 1090050- EPA 50308 PIT) <br /> Blank(1090050-BLKI) _ _ Prepared&Analyzed 09/05/01 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 933 100 933 60-140 <br /> 1a Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />