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4 <br /> 819 Striker Avenue Suite 8 ' <br /> Sequoia Sacramento u.95600 <br /> FAX(916)921-0 too <br /> Analytical www sequolalabs corn ' <br /> SECOR international-Rancho Cordova Project ARCO 595,Stockton,CA ' <br /> 3017 Kilgore Road,Suite 100 Project Number NIA ,, Reported <br /> Rancho Cordova CA, 95670 - Project Manager-Rusty Benkosky 08/08/01 18 06 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source % EC RPD <br /> Analyte Result Limit Units Level Result %RF=C Limits RPI] Limit Notes <br /> Batch 1080063- EPA 5030E (MeOH) <br /> Blank(1080063-BLK1) Prepared&Analyzed 08/02/01 <br /> Purgeable Hydrocarbons ND 1 0 mg/kg <br /> Benzene Nil 00050 ' <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 __ — <br /> Surrogate a a a-Triuorotoluene 0201 0200 100 60-140 <br /> r , <br /> LCS(1080063-BSI) Prepared&Analyzed 08/02/01 <br /> Benzene 0 224 00050 mg/kg 0200 112 70-130 <br /> Toluene 0 221 00050 0200 110 70-130 <br /> Ethylbenzene 0207 00050 0200 104 70-130 <br /> Xylenes(total) 0 665 00050 0 600 1 i 1 70-130 <br /> Surrogate a a a-Trifluarotoluene 0 210 0200 105 60-140 <br /> Matrix Spike(1080063-MSI) Source 5107309-28 Prepared&Analyzed 08/02/01 <br /> Benzene 0 176 00050 mg/kg 0200 ND 880 60-140 <br /> Toluene _ 0 180 _ _ 0_0050 " 0200 _ _ND90 0__ 60-140 <br /> Ethylbenzene v 0 174 -00050 0200 ND 87 0 - 60-140 <br /> Xylenes(total) 0 557 00050 0 600 ND 928 60-140 ' <br /> Surrogate a a a-Triuorololuene 0202 0200 101 60-140 <br /> Matrix Spike Dup(1080063-MSD1) Source S107309-28' Prepared&Analyzed 08/02/01 ' <br /> Benzene 0 176 00050 mg/kg 0200 ND 88 0 60-140 000 25 <br /> Toluene 0 182 00050 0200 ND 910 60-140 1 t0 25 <br /> Ethylbenzene 0 175 00050 0200 ND 875 60-140 0 573 25 <br /> Xylenes(total) 0 565 100050 0 600 ND 942 60-140 1 43 25 <br /> Surrogate a a a-Triuorotoluene 0 216 0200 108 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance ivith the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 13 of 15 ' <br />