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Sequoia SS9 <br /> Sacramento, CA 95834 <br /> 4 (916) 921-9600 <br /> 4Analytical FAX(916)92 1-0100 <br /> EMCON/Pmnacle-Sacramento Project ARCO 2130,Stockton,CA Sampled 9/2199 <br /> 1433 N Market Blvd Project Number 21775-229 003 Received 9/3/99 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 9120/99 <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 Limits % Limit % Notes* <br /> Blank(continued) 9090086-BLKl <br /> Surrogate a,a a-Trifluorotoluene 919199 100 101 14911 600-140 101 <br /> i�CS 9090086-135 I <br /> Benzene 9/9199 100 998 ug/l 700-130 998 <br /> Toluene 100 978 700-130 97 8 <br /> Ethylbenzene too 993 700-130 993 <br /> Xylenes(total) 300 28 3 700-130 94 3 <br /> Methyl tert-butyl ether too 101 700-130 101 <br /> Surrogate a,a a-Triuorotoluene 100 104 600-140 104 <br /> Matrix Sgtke 9090086-MSI 5909070-07 <br /> Benzene 919199 100 ND 102 ug/l 60 0-140 102 <br /> Toluene 100 ND 9 89 600-140 989 <br /> #Ethlbenzene 10 0 ND 10 2 600-140 102 <br /> es(total) 300 ND 27 7 60 0-140 92 3 <br /> yl tent-butyl ether 100 ND 107 600-140 107 <br /> Surrogate a a,a-Trtfluorotoluene 100 105 600-140 105 <br /> i <br /> Matrix Spike D11p 9090086-MSD1 5909070-07 <br /> Benzene 919/99 100 ND 102 ug/1 600-140 102 25 0 0 <br /> Toluene „ 100 ND 949 600-140 949 25 0 4 I3 <br /> Ethylbenzene Ittoo ND 102 600-140 102 25 0 0 <br /> Xylenes(total) 300 ND 275 600-140 917 25 0 0 652 <br /> Methyl tert-butyl ether too ND 107 600-140 107 25 0 0 <br /> Surrogate a a,a-Trifluorotoluene 100 103 600-140 103 <br /> Batch. 9090087 Date Prepared, 9110192 <br /> Blank 9090087-BLKI <br /> Purgeable Hydrocarbons 9/10199 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene " ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) SVD 0 500 <br /> Methyl tent-butyl ether ND 500 <br /> Surrogate a,a,a-Tnfluorotoluene 100 106 600-140 106 <br /> lACS 9090087-BS1 <br /> Benzene 9110199 100 950 ug/l 70 0-13D 95 0 <br /> Toluene 100 9 52 700-130 952 <br /> Ethylbenzene 100 9 61 70 0-130 96 1 <br /> Xylenes(total) 300 28 8 700-130 960 <br /> aia Analytical—Sacramento *Refer to end of report for text of notes and definitions <br /> ,p Page 7 of 12 <br />