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Sequoia CA 404 N Lane <br /> Walnut Creek CA 94598 <br /> (925)988-9600 <br /> a- -N <br /> Analytical www sequoliabs FAX alabs c 73 <br /> qucom <br /> Secor-Rancho Cordova Project Arco <br /> 13017 Kilgore Rd,Ste #100 Project Number Arco#595,Stockton Reported <br /> IIII Rancho Cordova CA,95670 Project Manager Clint Harms 03-Aug-01 14 02 <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 1G26001 -EPA 5030B PIT <br /> Blank(1G26001-BLK4)__ -_ Prepared&Analyzed 30-Jul-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> oluene ND 050 <br /> ihylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> L <br /> rogale a a a-Trifluoroioluene _ 251 300 _ 83 7 70-130 <br /> S(1G26001-BS4) Prepared&Analyzed 30-Jul-01 <br /> Benzene 21 3 050 ug/l 200 106 70-130 <br /> Ioluene 21 0 0 50 n 200 105 70-130 <br /> thylbenzene 214 050 200 107 70-130 <br /> Xylenes(total) 59 6 0 50 600 993 70-130 <br /> e a a a-Trifluorotoluene 294 300 980 70-130 <br /> Latrix Spike(1G26001-MSi) Source W107364-12 Prepared 26-Jul-01 Analyzed 28-Jul-01 <br /> Benzene 22 7 -- 050 ug/l 200 ND 114 70-130 --- mm <br /> tylbenzene <br /> uene 215 0 50 200 ND 108 70-130 <br /> 227 050 200 ND 114 70-130 <br /> Xylenes(total) 628 050 600 ND 105 70-130 <br /> turrogate a,a a-Trruorololuene 324 300 108 70-130 <br /> Matrix Spike Dup(1G26001-MSDI) Source W107364-12 Prepared 26-Jul-01 Analyzed 28-Jul-01 <br /> e 19 3 050 ug/l 200 ND 965 70-130 162 20 <br />(tobinyuEn.zene <br /> 186 050 200 ND 93 0 70-130 145 20 <br /> 195 050 200 ND 975 70-130 152 20 <br /> Xylenes(total) 527 050 60 0 ND 878 70-130 175 20 <br /> 1"ll-9-te a a a-Triuorotoluene 276 300 920 70-130 <br /> 'equala Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 7 <br /> 1 <br />