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819 Striker Avenue Suite 8 1 <br /> Sequoia Sacramento C 95834 <br /> (99 t 6)922 1-96009600 <br /> FAX(916)921-0100 <br /> a- — Analytical �seguoiatabs corn <br /> _ M <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 r Project Manager-Rusty Benkosky 08/20/01 18 00 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> - - - ��Sequola Analytical-Sacramento - — - <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1080180- EPA 5030B (PIT) <br /> Blank(1080180-BLKI) Prepared&Analyzed 08/15/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylberizene ND 050 " <br /> i <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Triuorotoluene 106 �" 1190 106 60-140 <br /> LC_S(1080180-BSI)_ Prepared&Analyzed 08/15/01 <br /> Benzene 110 050 ug/l 100 110 70-130 <br /> Toluene 102 0 50 100 102 70-130 <br /> Ethylbenzene 993 050 100 993 01 70-130 <br /> Xylenes(total) 303 050 300 101 70-130 <br /> Methyl tert-butyl ether 933 2 5 10 0 933 70-130 <br /> Surrogate a a a-Trifluorotoluene 11 7 100 117 60-140 <br /> Matrix Spike(1080180-MSI) Source S108088-14 Prepared&Analyzed 08/15/01 <br /> Benzene f40- 0 50 ug(l 10 0 3 1 109 60-140 T <br /> Toluene 12 2 050 too-- 076 114 60-140 <br /> Ethylbenzene 418 W 050 t 0 0 33 880 60-140 <br /> Xylenes(total) 54 1 050 300 26 93 7 60-140 <br /> Methyl tort-butyl ether 525 25 100 24 285 60-140 QM-4X <br /> Surrogate a a a-Triuorotoluene 125 100 115 60-140 <br /> r_ nenoo . n------A P A--I.mrd AOi1GlA1 <br /> ITAMLI NA Spd.0 LAUD Ii1VOV 100-IVIJU 2) Oo'A ce 51000100-1' t ICvw Cuu rvuuy.CU <br /> Benzene 14 7 050 ug/l 100 3 l 116 60-140 488 25 <br /> Toluene 127 050 100 076 119 60-140 402 25 <br /> Ethylbenzene 409- 050 100 33 790 60-140 2 18 25 _ <br /> Xylenes(total) 523 050 300 26 877 60-140 338 25 <br /> Methyl tent-butyl ether 55 5 25 100 24 315 60-140 5 56 25 QM4X <br /> Surrogate a a a-Triuorotoluene� 135 too 135 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of 13 <br />