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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX`916' cion <br /> wwww sequolalabalabs corn <br /> SECOR International -Rancho Cordova Project Former Chevron 9-8632,Tracy,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43506 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Bill Brasher 06/15/01 13 38 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %R.EC RPD <br /> Analyte Result Limit Units Level Result %REG Limits RPD Limit Noies <br /> Batch 1 F06002 - EPA 5030B McOH <br /> i <br /> LCS(lF06002-BS2) _ Prepared 06/06/01 Analyzed 06/07/01 _ <br /> Benzene 0 730 00050 mgfkg 0 800 912 50-150 <br /> Toluene 0 768 00050 0 800 960 50-150 <br /> Ethylbenzene 0 808 00050 0 800 101 50-150 <br /> Xylenes(total) 241 00050 240 100 50-150 <br /> Surrogate a a a-Tnfluorotoluene 0 668 0 600 111 40-140 <br /> Matrix Spike(IF06002-MSI) _ Source W106082-01 Prepared 06/05/01 Analyzed 06/06/01 <br /> Benzene 0 756 00050 mgfkg 0 800 ND 94 5 50-150 <br /> Toluene 0 804 00050 0 800 ND 100 50-150 <br /> Ethylbenzene 0 838 00050 0 800 ND 105 50-150 <br /> X,.lenes(total) 252 00050 240 ND 105 50-150 <br /> w9-TI <br /> a a a Trifluorotoluene 0 636 0 600 106 40-140 <br /> Matrix Spike Dup(lF06002-MSDI) Source W106082-01 Prepared 06/05/01 Analyzed 06/06/01 <br /> Benzene 0 712 00050 mg/kg 0 800 ND 890 50-150 599 20 <br /> Toluene 0 754 00050 0 800 ND 942 50-150 642 20 <br /> Ethylbenzene 0 780 00050 0 800 ND 975 50-150 7 17 20 <br /> Xylenes(total) 2 36 00050 240 ND 983 50-150 656 20 <br /> Surrogate a a a Trifluorotoluene 0 590 0 600 983 40-140 <br /> jala 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 14 of 15 <br />