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Sequoia CA 404 N Lane <br /> Walnut Creek CA 94598 <br /> (925)988-9600 <br /> Analytical www <br /> (925)988-9673 <br /> www sequoialabs corn <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd Ste #100 Project Number Arco 4 595, Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 29-Aug-Ol 11 26 <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 /> nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G20001 - EPA 5030B PIT <br /> lank(IG20001-BLK5) Prepared&Analyzed 20-Jul-01 <br /> urgeable Hydrocarbons(C6-C12) ND 50 ug/I <br /> Benzene ND 050 " <br /> Ioluene ND 050 <br /> thylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> LS <br /> agate a a a-Tri luorwoluene 291 300 970 70-130(1G20001-BSI) Prepared&Analyzed 20-Jul-01 <br /> enzene <br /> 208 050 ug/I 200 104 70-130 <br /> oluene 20 1 050 200 100 70-130 <br /> thylbenzene 21 8 050 200 109 70-130 <br /> Xylenes(total) 61 3 050 600 102 70-130 <br /> I*e a a a-Tri luorololuene 310 300 103 70-130 <br /> LCS(1G20001-BS2) Prepared&Analyzed 22-Jul-01 <br /> enzene 18 8 0 50 ug/l 200 940 70-130 <br /> oluene 18 6 0 50 20 0 93 0 70-130 <br /> thylbenzene 191 0 50 200 955 70-130 <br /> Xylenes(total) 536 0 50 600 893 70-130 <br /> V;ogwle- <br /> a a a-Tri)`luorotoluene 272 300 907 70-130 <br /> LCS(I G20001-BS3) Prepared&Analyzed 23-Jul-01 <br /> 21 5 050 ug/1 200 108 70-130 <br /> oluene <br /> 201 050 200 100 70-130 <br /> thyl:rizene 212 050 " 200 106 70-130 <br />—Xylenes(total) 59 1 0 50 i 600 985 70-130 - — <br /> V-9-i; <br /> a a a-Triuorotoluene 301 300 100 70-130 <br /> e a Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thus analytical report must be reproduced to its entirety <br /> Page 5 of 13 <br />