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Road <br /> Sequoia an Carl Industrial 4070 <br /> San Carlos CA 94970 <br /> Analytical <br /> 4D- 4 (650)232-9600 <br /> qwrAnalytical _ FAX(650)2329612 <br /> www sequoislabs com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) L208029 <br /> 6747 Sierra Court. Suite 1 Project Number Former Unocal 42859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Total Purgeable Hydrocarbons (C6-00) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limn Units Level I Result %REC Limits RPD Limit Notes <br /> Batch 2H22004- EPA 5030B lP/T] <br /> Laboratory Control Sample (2H22004-BSI) Prepared&Analvzed 08/22/02 - <br /> Surrogate a,a a-Triuorotoluene 108 u9/1 100 108 70-130 <br /> Laboratory Control Sample (2H22004-BS2) Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 276 50 ug/1 250 110 70-130 <br /> Surrogate a a a-Triuorotoluene 172 100 172 70-130 S-02 <br /> Matrix Spike(2H22004-MS1) ry Source MLHO343-03 Prepared&Analvzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 495 50 ug/I 550 ND 900 60-'140 <br /> Benzene M y 842 0% 660 ND 128 60-140 <br /> Toluene 417 050 397 ND 105 60-140 <br /> Ethylbenzene 868 _ 050 920 ND 943 60-140 <br /> Xylenes(total) 443 050 461 ND 958 60-140 <br /> Surrogate a a a-Triuorotoluene 5 75 100 57.5 70-130 QM-07 <br /> Matrix Spike Dup(2H22004_MSD1)_ Source MLH0343=03_Prepared&Analyzed__08/22_/02 _ <br /> Gasoline Range Organics(C6-C10) 457 50 ugA 550 ND 831 60-140 798 25 <br /> Benzene—_-T __ ___8 52 0 50__ _6 60—ND;_ 129---60-140=1 18_ - ,25_ <br /> Toluene 427 050 397 ND 108 60-140 237 25 <br /> -Ethylbenzene-- -- ��- -----8 95 =-tet=0 50- - "- --9 2V-=ND-=---97 3---60-140 -=3 06- -`25 -- <br /> Xylenes(tots]) 44 1 050 461 ND 954 60-140 0 452 25 <br /> Surrogate a a o-Trt)?uorotoluene 116 100 126 70-130 <br /> Batch 2H23003-EPA 5030B ED <br /> Blank(2H23003-BLKI) Prepared&Analyzed 08/23/02 <br /> Gasoline Range Organics(C6-CIO) ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl ten-butyl ether ND 25 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless otherwise stared results are reported on a iver weight basis <br /> This analytical report must be reproduced in its entirety; <br /> Page 21 of 25 <br />