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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 12) (916)921-9600 <br /> AFAX 921-0i00 <br /> Analytical <br /> www sequoquolalabs corn <br /> �1 <br /> SECOR International-Rancho Cordova Project Former Chevron 9-8632,Tracy,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43469 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Bill Brasher 06/15/01 13 20 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC R?D <br /> Analyte Result Limit Units Level Result %kEc limits RPD Limit Notes <br /> Batch IF06002- EPA 5030B McOH <br /> LCS(I F06002-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-Tr fluorololuene 0 668 0 600 111 40-140 <br /> Matrix Spike(11706002-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) 2 52 00050 240 ND 105 50-150 <br /> Wale a a a-Trruorotoluene 0 636 0 600 106 40-140 <br /> Matrix Spike Dup(IF06002-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 �W <br /> Toluene 0 754 00050 0 800 ND 942 50-150 642 20 <br /> Ethylbenzene 0 780 00050 0 800 ND 975 50-150 717 20 <br /> Xylenes(total) 236 00050 240 ND 983 50-150 656 20 <br /> Surrogate a a a-Trifluorotoluene 0.590 0 600 983 40-140 <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 he reproduced in its entirety <br /> Page 17 of 18 <br />