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rl m <br /> Sequoia 819 5tnker Avenue Suite s <br /> Sacramento,CA 95834 <br /> f 4 (916)921-9600 <br /> Analytical FAX(916)921-0100 <br />;ECOR International-Sacramento Project ARCO 2093 Tracy,CA Samplcd 1118/99 <br />>912 Bustnce,s Park Dr.Ste 1 DD Project Number NIA Received 11/10/99 <br /> iacraento,CA 95827 Project Manager Rusty Benkas Rtported 11(23/99 <br /> m <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE to Air by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Datc Spike Samplc QC Reporting Limit Recoy RPD RPD <br /> qma1 a Analyzed Lovel Result Rcsult Units Recov Luntts % Limit % Notes* <br /> Batch 9110176 Date Prepared 11/11/99 Extraction Method EPA 5030B McOH <br /> Blank 110176-BLK1 <br /> Purgcablc Hvdrocarbons 11/11/99 ND mglm'Air 10 o <br /> Ben��ene ND 0 Mo <br /> Toluene ND 00500 <br /> Eth)lbenzenc ND 00500 <br /> Xvlenes(total) ND 00500 <br /> Methyl tent-butyl ether ND 0 500 <br /> Surrogare a,a a-Trrfluvroeoluene 200 1 02 600-140 IOl <br /> LCS 911 il��76=BSI <br /> Bcnzcnc 11111/99 200 2 14 mglm'torr 70 0-130 I07 <br /> Toluene 200 2 14 700-130 107 <br /> Ethylbenzene 200 2 14 700-130 107 <br /> iftes(total) 600 6 83 700-130 114 <br /> MW I tert-butyl ether 200 -� 2 13 _ 700-130 107 <br /> Surrogate a,a a-Tr fluorotoluene 2 OO 201 600-140 100 <br /> LCS Dur 9110176-BSDi <br /> m�tn'Air 70 D-130 105 Z5 0 1 89 <br /> Berlccne 11/11/99 200 2 1 i <br /> Toluene 2 DO 2 10 700-130 105 25 0 189 <br /> Ethy lbenzene 200 211 ry 700-130 105 25 0 189 <br /> Xylenes(total) 600 672 700-130 112 25 0 177 <br /> Methyl tett-butyl edict 200 _ 198 —700-130 990 250 777- _ <br /> Surrogate a,ao-Trifluorotoluene 200 196 600-140 98 0 <br /> Sequoia Analytical-Sacramento *Refer ro end ojreportjor text ojnotes and deftur:ons <br /> page 4 of 6 <br /> big ous/lHIOf1035 wuir*oT 66. C2 AON <br />