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s) A <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)9Z 19600 <br /> FAX(916)921 0100 <br /> Analytical www seduoialabs corn <br /> so <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 05/24/01 17 25 <br /> Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Rowlt Limit Units Uvel Result %RLC Limits RPD I imit Notes <br /> Batch 1050194- EPA 5030B(P/T) <br /> Blank(1050194-BLKI) _ _Prepared&Analyzed 05/14/01 <br /> Purgeable Hydrocarbons ND 500 ug/1 <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Tr fluorotoluene 957 1100 95 7 60-140 - <br /> LCS(1050194-BS1) Prepared&Analyzed 05/14/01 <br /> Benzene 863 0 500 ug/1 100 863 70-130 <br /> WInne. 10I 0500 100 101 70-130 <br /> 10 8 0 500 100 108 70-130 <br /> Xylenes(total) 320 0 500 300 107 70-130 <br /> Methyl tert-butyl ether 7 83 2 50 100 78 3 70-130 <br /> Surrogate a a a-Trifluorotoluene 984 11100 984 60-140 <br /> _Matrix Spike(1050194-M_S1) _ Source 5105123-05 Prepared&Analyzed 05/14/01 <br /> Benzene 843 0 500 ugA l0 0 ND 843 60-140 <br /> Toluene 994 0 500 100 ND 994 60-140 <br /> Ethylbenzene 108 0 500 " 100 ND 108 60-140 <br /> Xylenes(total) 319 0 500 300 ND 106 60-140 <br /> Methyl tert-butyl ether 828 250 100 ND 828 60-140 <br /> Surrogate a,a,a-Trifluorotoluerte 916 100 916 60-140 <br /> Matrix Spike_Dup(1050194-MSD1) _ Source 5105123-05 Prepared&Analyzed 05/14/01 <br /> Benzonc 887 0 500 ug/1 100 ND 887 60-140 5 09 25 <br /> Toluene 105 0 500 100 ND 105 60-140 548 25 <br /> Ethylbenzene 1 1 4 0 500 " loo ND 114 60-140 541 25 <br /> Xylenes(total) 336 0 500 300 ND 112 60-140 5 19 25 <br /> Methyl tert-butyl ether 860 250 too ND 860 60-140 3 79 25 <br /> Surrogate a a a-Trruorotoluene 910 11100 910 60-140 <br /> oia 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 entirely <br /> Page 5 of 8 <br /> X9 <br />