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r. • <br /> Sequoia 819 Straker Avenue Sutte8 <br /> 958 <br /> Sacramento CA 95834 <br /> 4 (916)921-9600 <br /> 4D 4 Analytical FAX(916)921-0 100 <br /> SECOR International-Sacramento Project ARCO 2093,Tracy,CA Sampled 2/29/00 <br /> 9912 Business Park Dr,Ste 100 Project Number N/A Received 3/l/00 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/10/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal to Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank continued _ _ 0030074-BLK1 _ - <br /> Surrogate aaa-Trefluorololuene 3/7/00 10 0 109 u9/1 60 0-190 109 <br /> LCS 0030074-B S I <br /> Benzene 317/00 100 984 ug/1 700-130 984 <br /> Toluene 100 975 700-130 975 <br /> Ethylbenzene too 999 700-130 999 <br /> Xyienes(total) 300 299 ;; 700-130 997 <br /> Methyl tert-butyl ether _ _ 100106 - _ 700-130 106 <br /> Surrogate -a a-Trifluorotoluene !0 0 10 7 60 D-140 107 <br /> Matrix Spike 0030074-MSI S002374-06 <br /> Benzene 3/7100 100 ND 102 ug/l 60 0-140 102 <br /> Toluene too ND 10 1 600-140 101 <br /> Ethylbenzene 100 ND 104 600-140 104 <br /> Xylenes(total) 300 ND 304 600-140 101 <br /> Methyl tert-butyl ether _ T 100 _ND 110 600-140 110 — <br /> Surrogale a a,a-Trtfluorotoluene 160 108 600-140 108 <br /> Matrix Spike Dup 0030074-MSDI 5002374-06 <br /> Benzene 3/7/00 100 ND 100 ugll 60 0-140 100 25 0 1 98 <br /> Toluene too ND 9 88 60 0-140 98 8 25 0 Z ZO <br /> Ethylbenzene 100 ND 101 600-140 101 250 293 <br /> Xylenes(total) 300 ND 302 600-140 101 250 0 <br /> Methyl tert-butyl ether 100 ND 1 l 8 600-140 _ 118 250 702 _ <br /> — — — — <br /> Surrogate aa a-Trejluorotoluene <br /> 10 0 10 6 " b0 0-140 106 <br /> Batch 0030086 Date Prepared _318100 Extraction Method EPA 5030E(Me0_I) <br /> Blank 0030086-BLK1 <br /> Purgeable Hydrocarbons 3/8/00 ND ugf i 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert_-butyl ether ___- __ _ ND - _ _ 250 <br /> Surrogate a a a-Trifluorotoluene 10 0 103 600-140 103 <br /> LCS 0030086-BS 1 <br /> Benzene 3/8/00 100 103 ug/l 70 0-130 103 <br /> Toluene 100 102 <br /> 70 0-130 102 <br /> Ethylbenzene 100 103 700-130 103 <br /> Xylenes(total) 300 309 700-130 103 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 6 of 9 <br />