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819 Striker Avenue Suite 8 <br /> 4 Sequoia 91° CA95834{916}921-9600 <br /> 100 <br /> Analytical FAX equo gabs2 1 com <br /> www sequoialabs coin <br /> k0EC <br /> OR International-Rancho Cordova Project Arco 4932, Stockton,CA <br /> 17 Kilgore Road,Suite 100 Project Number N/A Reported <br /> .Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/01/01 18 25 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting sptke Source %RLC RPD <br /> Analyte Result Limit Units Level Result %RLC I Imus RPD Limit NolLs <br /> Match 1070261 -EPA 5030B (MeOH) <br /> %ank(1070261-BLK1) Prepared&Anal vzed 07/25/01 <br /> 'urgeable Hydrocarbons - --- - - -- ------ ND--- - 10 mg/kg - - -------- --- --- -- - -- ---- -- --- —- -a <br /> tl.,.-.n, <br /> ND 00050 <br /> ue ND 00050 " <br /> Ethylbenzene ND 00050 <br /> lenes(total) ND 00050 <br /> ethyl tert-butyl ether ND 0 050 " <br /> Surrogate a a a-Tris luorotoluene 0 146 0200 730 v60-140 <br /> UzS(107026.1-BSI) _ Prepared&Analyzed 07/25/01 <br /> ene 0 188 00050 mg/]g 0200 940 70-130 <br /> Toluene 0 187 00050 0200 93 5 70-130 <br /> ne 0 174 00050 0200 870 70-130 <br /> 1 (total) 0 561 00050 0 600 93 5 70-130 <br /> Methyl tert-butyl ether 0 216 0 050 0200 108 70-130 <br /> rogate a a a-Triuorotoluene 0 195 0200 975 60-140 <br /> trix Spike(1070261-MS1) _ Source 5107224-03 Prepared&Analyzed 07/25/01 <br /> Benzene 0 187 00050 mg/kg 0200 ND 935 60-140 <br /> ty—ZInne <br /> 0189 00050 0200 ND 945 60-140 <br /> 0 180 00050 0200 ND 900 60-140 <br /> Xylenes(total) 0 587 00050 0 600 ND 978 60-140 <br /> ethyl tert-butyl ether 0 275 0 050 0200 ND 138 60-140 <br /> rogale a aa-Trtfluorotoluene 0 194 0200 970 60-140 <br /> Matrix Spike Dup(1070261-MSDi) Source 5107224-03 Prepared&Analyzed 07/25/01 _ <br /> Ve0 178 00050 mg/kg 0200 ND 890 60-140 493 25 <br /> oluene 0 180 00050 0200 ND 900 60-140 488 25 <br /> Ethylbenzene 0 170 00050 0200 ND 850 60-140 571 25 <br /> Iffyierics(Notal) 0 551 00050 0 600 ND 91 8 60-140 633 25 <br /> 7ethyl tert-butyl ether 0 265 0 050 0200 ND 132 60-140 370 25 <br /> Surrogate a,a,a-Trtfluorotoluene 0 194 0200 970 60-140 <br /> So is 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 be reproduced in its entirety <br /> ' Page 6 of 8 <br />