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819 Striker Avenue Suite 8 <br /> S e qu o 1 a Sacramento CA 95834 <br /> (916)921-%W <br /> Analytical <br /> FAX(916) 00 <br /> Hwww sequoislabs alabs com <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 39 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creep <br /> Reporting Spike Source %REC RPD <br /> [Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1F06002- EPA 5030B McOH <br /> LCS(IF06002-BS2) Prepared 06/06/01 Analyzed 06/07/01 <br /> Benzene 0 730 00050 mg/kg 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-Trifluorotoluene 0 668 0 600 111 40-140 <br /> Matrix Spike(1F06002-MSI) Source W106082-01 Prepared 06/05/01 Analyzed 06/06/01 <br /> Benzene 0 756 00050 mg/kg 0 800 ND 945 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 /> Xylenes(total) 252 00050 240 ND 105 50-150 <br /> gate a a a-Tnfluororoluene 0 636 0 G00 106 40-140 <br /> Matrix Spike Dup(1F06002-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) 236 00050 240 ND 98 3 50-150 656 20 <br /> Surrogate a a a-Trruorotoluene 0 590 0 600 98 3 40-140 <br /> Wawa Analytical-Sacramento The results in this report apply to the samples analyzed rn accordance with fire chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 14 of 15 <br />