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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916) 92 1-9600 <br /> Analytical <br /> FAX (916) 92 I-0 100 <br /> i <br /> ON/Pinnacle-Sacramento Project ARCO 548,Stockton,CA <br /> I433 N Market Blvd Sampled 6/28199 <br /> Project Number 21775-206 004 Received 6/28/99 <br /> Sacramento,CA 95834 Pro ect Manager Dave Foley P.— <br /> ed. 7114199 <br /> TotahPurgeable1 Hydro6rbbnsa(C6-,C12),BTEX grid MTBE by DHS-L'UFT/Quality Control, <br /> ~ 'Sequoia Analyttcal;rSacramento <br /> Date Spike Sample QC Reporting Limit Reco% RPD RPD <br /> Analyte Analyzed LevelResult Result Units Recov Limits :o <br /> Limit % Notes* <br /> Batch. 9Q701 13 DatePrepared. 7/7!99 <br /> Extractioa Method, <br /> Blank _ <br /> BT.Ki EPA 5030B(PIT) <br /> Purgeable Hydrocarbons 7/7/99 ND ug/! 500 <br /> Benzene <br /> Toluene <br /> ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> ND " 0.500 <br /> Methyl tent-butyl ether ND 5 00 <br /> Surrogate a,a a-Trifluorotoluene 10 0 8 l2 60 0-140 81 2 <br /> LCS 9079113-HS1 <br /> Benzene 7/7/99 10 0 <br /> Toluene 807 ug/) 700-130 807 <br /> 100 838 1. 700-130 838 <br /> .Ethylbenzene 10 0 $59 700-130 85 9 <br /> Xylenes(total) 300 25 9 70 0-130 85 3 <br /> Methyl tort-butyl ether 10 0 860 700-130 86 0 <br /> S to aaa-Trtfluorotoluene 10 0 799 600-140 799 <br /> Matrix Spike 9420-ll3JYIS1 S.9907011--01 <br /> Benzene 7/7/99 100 ND 916 ug/l 600-140 91 6 <br /> Toluene 100 ND 957 600-140 95 7 <br /> Ethylbenzene 100 ND 966 60 0-140 95 <br /> Xylenes(total) 300 ND 295 60 0-140 966 <br /> 3 <br /> Methyl tert-butyl ether 10 0 ND 12 0 600-140 120 <br /> Surrogate a a a-Trifluorotoluene 100 917 60 0-140 91 7 <br /> Matrix Spike DjW 9070113-MSDI S907 17-ol <br /> Benzene 7/7/99 100 ND 9 13 ug/l 600-140 9I 3 25 0 0 328 <br /> Toluene 100 ND 9 30 60 0-140 93 0 25 0 2 86 <br /> Ethylbenzene 100 ND 967 60 0-140 96 7 25 0 0 103 <br /> Xylenes(total) 300 ND 300 600-140 100 250 171 <br /> Methyl tert-butyl ether 100 ND 109 60 0-140 109 25 0 9 6I <br /> Surrogate a a,a-Trtfluorotoluene 100 9 15 60 0-140 91 S <br /> Batch. 907013! Rate-Prepared, 719199 <br /> k 4070137-,�jI,K1 E1Ktract�o11-Method. ,,,EPA 5030D(PIT) <br /> 3urgeable Hydrocarbons 7/12/99 ND ug/l 500 <br /> lenzene <br />'oluene �� <br /> ND 0 500 <br /> thylbenzene ND 0 500 <br /> ND 0 500 <br />.ylenes(total) ND 0 500 <br /> Rethyl tert-butyl ether ND 5 00 <br /> eq nalyt�cal-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 6 <br />