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T Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)92 t-9600 <br /> I )r <br /> Analytical FAX(916)921-0100 <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 9113/99 <br /> 1912 Business Park Dr,Ste 100 Project Number 077 41 844 008 Received 9114/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 9/24/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DIIS LUFT/Quality Control <br /> Sequota 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(continued2 _ 9090223-BLKI___ <br /> Surrogate a a a-Trifluorololuene 9/2//99 100 9 53 ug/1 600-140 953 <br /> LCS 9090223-BSI <br /> Benzene 9/21/99 100 946 ug/l 700-130 946 <br /> Toluene 100 9 17 700-130 917 <br /> Ethylbenzene too 9 15 700-130 915 <br /> Xylenes(total) 300 273 700-130 91 0 <br /> Methyl tett-butyl ether 100 978 70 0-130-_- 97 8 <br /> Surrogate a,a a-Tnfluorotoluene 100 929 600-140 92 9 <br /> Matrix Spike 9090223-MS1 5909173-01 <br /> Benzene 9/21/99 100 ND 983 ug/1 600-140 983 <br /> Toluene 100 ND 972 600-140 972 <br /> X�nzene 10 0 ND 965 600-140 965 <br /> (total) 30 0 ND 28 8 60 0-140 96 0 <br /> M yl tett-butyl ether _ 100 ND 11 1 600 111 <br /> Surrogate a a,a-Trifluorotoluene 100 109 600-140 109 <br /> Matnx Spike Dup 9090223-MSD1 5909173-01 <br /> Benzene 9/21/99 too ND 992 ug/l 60 0-140 99 2 25 0 0 911 <br /> Toluene 100 ND 9 87 600-140 987 25 0 153 <br /> Ethylbenzene 10 0 ND 982 600-140 982 25 0 175 <br /> Xylenes(total) 300 ND 29 3 600-140 977 25 0 176 <br /> Methyl tert-butyl ether 10 0 ND _ 115 600-140 115 _ 25 0 _ 354 _ <br /> Surrogate a,a a-Trtfluorotoluene 100 10 7 60 0-140 107 <br /> Batch 9090224 Date Prepared 9/22/99 Extraction Method EPA 5030B(PIT) <br /> Blank 9090224-BLK1 <br /> Purgeable Hydrocarbons 9/22/99 ND ug/l 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 _ 5 00 <br /> Surrog_ate a a a-Trifluorotoluene /00 960 600-140 960 <br /> LCS 9090224-BS 1 <br /> Benzene 9/22/99 100 886 ug/l 70 0-130 $8 6 <br /> Toluene 10 0 9 04 700-130 904 <br /> Ethylbenzene 10 0 894 700-130 894 <br /> Xyle es(total) 30 0 268 700-130 893 <br /> Se a Analytical -Sacramento *Refer to end of report for text of notes and definitions <br /> Page 8 of 12 <br />