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819 Striker Avenue Suite 8 <br /> Sequoia <br /> Sacramento 9 195834 <br /> FAX(916) 921-0100 <br /> Analytical www sequoialabs corn <br /> SECOR International-Rancho Cordova Project Chevron 9-6171,Stockton,CA <br /> 3017 Kilgore Road, Suite 100 Project Number 077 43512 251 Reported <br /> Rancho Cordova CA,95670 Project Manager Bill Brasher 07/12/01 18 32 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IF25005- EPA 5030B McOH <br /> Matrix Spike(1F25005-MS1) Source W106461-01 Prepared 06/25/01 Analyzed 06/28/01 <br /> Benzene 0 752 00050 mgfkg 0 800 ND 94 0 50-150 <br /> Toluene 0 800 00050 0 800 ND 100 50-150 <br /> Ethylbenzene 0 842 00050 0 800 ND 105 50-150 <br /> Xylenes(total) 255 00050 240 ND 106 50-150 <br /> Surrogate a a a-Triuorotoluene 0 508 0 600 84 7 40-130 <br /> Matrix Spike Dup(1F25005-MSD1) Source W106461-01 Prepared 06/25/01 Analyzed 06/28/01 <br /> Benzene 0 734 00050 mg/kg 0 800 ND 918 50-150 242 20 <br /> Toluene 0 782 00050 0 800 ND 978 50-150 228 20 <br /> Ethylbenzene 0 830 00050 0 800 ND 104 50-150 1 44 20 <br /> Xylenes(total) 249 00050 240 ND 104 50-150 238 20 <br /> ate a a a-Trruorotoluene 0 500 0 600 83 3 40-140 <br /> oia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the thorn of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />