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Sequoia SI9 acra r Avenue Suite 8 <br /> Sacramento,CA 95834 <br /> 4(D (916)921-9600 <br /> �,,,� Analytical FAX egUO alabs c 00 <br /> WWW sequaialabs tom <br /> EMCON/IT-Sacramento Project ARCO 2186, Stockton,CA Sampled 413/00 <br /> 1433N Market Blvd,#1 Project Number 803883 Received 413/00 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 4117/00 <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 /> [Analyte Analyzed Level Result Result Units Recov Liruts % Limit % Notcs" <br /> Blank continued 0040091-BLK1 <br /> Surrogate a,a,a-Trifluorotoluene 4/10/00 100 11 1 u9/1 600-140 111 <br /> LCS 0040091-BSI <br /> Benzene 4110100 100 9 18 ug/l 700-130 918 <br /> Toluene 100 9 23 700-130 92 3 <br /> Ethylbenzene 100 968 700-130 968 <br /> Xylenes(total) 300 28 8 700-130 960 <br /> Methyl tert-butyl ether 100 9 08 700-130 908 <br /> Surrogate a,a,a-Trifluorotoluene 100 113 600-140 113 <br /> Matrix S1ike 0040091-MS1 5003387-09 <br /> Benzene 4/10/00 100 ND 9 16 ug/1 600-140 91 6 <br /> Toluene 100 ND 928 600-140 928 <br /> 0etbenzene 100 ND 990 600-140 990 <br /> es(total) 300 ND 29 6 600-140 987 <br /> yl tert-butyl ether _ 100 ND 11 7 600-140 117 <br /> Surrogate a a a-Trifluorotoluene 100 112 600-140 112 <br /> Matrix Spike Dup 0040091-MSD1 5003387-09 <br /> Benzene 4/10100 100 ND 9 13 ug/1 600-140 913 250 0 328 <br /> Toluene 100 ND 930 600-140 93 0 250 0 215 <br /> Ethylbenzene 100 ND 9 83 600-140 98 3 250 0 710 <br /> Xylenes(total) 300 ND 29 4 600-140 980 250 0 712 <br /> _Methyl tert-butyl ether 100 ND 10 6 600-140 106 250 9 87 <br /> Surrogate a a,a-Trifluorotoluene 100 108 600-140 108 <br /> Batch 0040105 Date Prepared 4/12/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0040105-BLKI <br /> Purgeable Hydrocarbons 4/12/00 ND ug/1 500 <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 100 929 600-140 92 9 <br /> LCS 0040105-BSI <br /> Benzene 4112100 100 974 ug/l 700-130 974 <br /> Toluene 100 970 700-130 970 <br /> Ethylbenzene 100 9 87 700-130 98 7 <br /> es(total) 300 292 700-130 973 <br /> Se ota Analytical- Sacramento *Refer to end of report for text of notes and definitions <br /> Page 6 of 9 <br />