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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento c 95834 <br /> (9 16)921-9Wo <br /> FAX(916)921-0100 <br /> �,,,� Analytical www sequolalabs corn <br /> i <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 /> Analyte Result Limit Umts Level Result %REC Limits RPD Limit Notes <br /> Batch 1090050 - EPA 5030E (P/T) <br /> LCS(1090050-BS 1) - _--_ -_ _ - Prepared&Analyzed 09/05/01 — <br /> B--nzene 106 050 ugll 100 106 70-130 <br /> l oluene 102 050 100 102 70-130 <br /> Ethylbenzene 102 050 100 102 70-130 <br /> Xylenes(total) 302 050 300 101 70-130 <br /> Methyl cert-butyl ether 11 1 25 too 111 70_130 <br /> Surrogate a a a-Triuorololuene 942 - 100 942 60-140 <br /> Matrix Spike(1090050-MSI) - Source 5108348_13 Prepared&Analyzed 09/05/01 ---- <br /> Benzene <br /> _ _Benzene 107 0 50 ug/l 100 ND 107 60-140 <br /> Toluene 104 050 10 0 ND 104 60-140 <br /> Ethylbenzene 101 050 100 ND 101 60-140 <br /> Xylenes(total) 306 0 50 300 058 100 60-140 <br /> Methyl tent-butyl ether l2 8 2 5 too ND 128 60-140 <br /> Surrogate4a a a-Trfluorotoluene 9 72 100 972 60-140 <br /> Matrix Spike_D_up(1090450_-_M_S_D_1) _Source S108348_-l3 —_ Prepared&Analyzed 09/05/01 <br />- Benzene 11 4-050—ug/1-100—ND-114-60:140-633 25 <br /> Toluene 10 5 0 50 100 ND 105 60-1400-957 25 <br />=Ethylbcnzene 108 0 50 100 ND 108 60-140 670 25 <br /> Xylenes(total) 32 5 0 50 300 058 106 60-140 602 25 <br /> Methyl tent-butyl ether - - -136- - 25 _ __ 10 0 _ ND 136_ - 60-140 606 25 <br /> Surrogate a a a-Trrfluorotoluene 9 15� 100 915 60-140 <br /> Batch 1090060- EPA 50308 PIT <br /> Blank(1090060_BLK1) ___ _ (Prepared&Analyzed 09/06/01 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluororoluene 954 100 95 4 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chair <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 1 i of 13 <br />