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SLuoia 8t9 Striker Avenue Suite 8 ' <br /> [] Sacramento CA 95834 <br /> 1 (916)921-9600 <br /> Analytical FAX(916)alabs92 1 I corn www sequoilabs com ' <br /> • <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA ' <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky " 08/20/01 18 00 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD i <br /> Analyte Result Limit Units bevel Result %REC Limits RPD Limit Notes <br /> Batch 1080189- EPA 5030B(PIT) <br /> Blank(1080189-BLK1) Prepared&Analyzed 08/15/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 ' <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) — ND 050 — <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a,a a-Trifluorotoluene f 118 100 118 60-140 <br /> _LCS(1080189-BS1) Prepared&Analyzed 08/15/01 <br /> Benzene 9 54 0 50 ug/l too 95 4 70-130 <br /> Toluene 954 0 50 l0 0 95 4 70-130 <br /> Ethylbenzene 950 050 too 950 70-130 ., <br /> Xylenes(total) 268 050 300 893 70-130 <br /> Methyl tert-butyl ether 13 0 25 10 0 130 70-110 <br /> Surrogate a a a-Trifluorotoluene 120 100 110 60-140 <br /> Matrix Spike(1080189-MSI) Source 5108070-06 Prepared&Analyzed 08/15/01 _ <br /> Benzene 9 93 050 ug/I 100 ND 993 60-140 <br /> Toluene _ Wo, 0 50 10 0 ND -100 60-140 , <br /> Ethylbenzene 10 0 0 50 100 ND 100 60-140 <br /> Xylenes(total) 285 0 50 " 300 ND 95 0 60-140 <br /> Methyl cert-butyl ether 112 25 10 0 ND 112 60-140 <br /> Surrogate a,aa-Triuorotoluene 119 100 119 60-140 <br /> pole"up(i080189-iviau1) aource S108070-06 Prepared&Analyzed 08/15/01 <br /> Benzene 993 050 ug/l IO 0 ND 993 60-140 0 00 25 <br /> Toluene 999 050 " 100 ND 999 60-140 0 100 25 <br /> Ethylbenzene 995 0 50 too ND 995 60-140 0 501 25 <br /> Xylenes(total) W --— 281 4 50 300 ND 93 7 60-140 141 25 <br /> Methyl tert-butyl ether 11 1 25 100 ND 111 60-140 0 897 25 <br /> Surrogate a a,a-Trii luorotoluene 11 7 100 117 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 10 of 13 , <br />