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404 N WgetLane <br /> ;,,4iSequoia Walnut Creek CA 94598 <br /> +� <br /> corn(925)988 9600 <br /> Analytics - - - — - - - FAX(925)988 9673 <br /> `.a www sequoialabs co <br /> 7cor-Rancho Cordova Project Arco <br /> 17 Kilgore Rd Ste #100 Project Number Arco# 4932,Stockton Reported <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 31-Jul-01 1056 <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 /> talyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> 3atch 1G24005- EPA 50308 McOH <br /> nk(IG24005-BLK1) Prepared 24-Jul-01 Analysed 25-Jul-Ol <br /> geable Hydrocarbons ND 10 mglkg <br /> krizene ND 00050 <br /> lUene ND 00050 ; <br /> ylbenzene ND 00050 <br /> (ylenes(total) ND 00050 <br /> gate a a a-Tnfluorololuene 0 638 0 600 106 40-140 <br /> tso(IG24005-BSI) <br /> Prepared 24-Jul-01 Analyzed 25-Jul-01 <br /> enc 0 816 0 0050 ritg/kg0 8 <br /> - 00 102 50-150 <br /> bene 0 856 00050 0 800 107 50-150 <br /> ylbenzene 0 880 00050 0 800 110 50-I50 <br /> Kyles (total) 267 00050 240 111 50-150 <br /> a a a-Triuorotoluene 0 800 0 600 _ 133 40-140 ---- <br /> Matrix Spike(IG24005-MSI) Source W107340-02 Prepared 24-Jul-01 Analyzed 25-Jul-01 <br /> ne 0 782 00050 mg/kg 0 800 ND 978 50-150 <br /> acne 0 816 00050 0 800 ND 102 50-150 <br /> F0 854 00050 0 800 ND 107 50-150 <br /> X enes(total) 257 00050 240 ND 107 50-150 <br /> gale a a a-Triuorotoluene 0 662 0 600 110 40-140 — <br /> Matrix Spike Dup(IG24005-MSD1) Source W107340-02 Prepared 24-Jul-0I Analyzed 25-Jul-01 <br /> 0 806 00050 mglkg 0 800 ND 101 50-150 302 20 <br /> uenc 0 850 00050 0 800 ND 106 50-150 408 20 <br /> Ethylbenzene 0 886 00050 0 800 ND 111 50-150 368 20 <br /> lenes(total) 265 00050 240 ND 110 50-150 307 20 <br /> ogate a a a-Triuorotoluene 0 688 0 600 115 40-140 <br /> a Analytical - Walnut Creek The results in this report apply to the samples analyred in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br /> 4?x <br />