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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-96W <br />(iN Analytical FAX(916)92 1-0 100 <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 9/13/99 <br /> 9912 Business Park Dr,Ste 100 Protect Number 077 41844 008 Received 9/i4/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 9/24/99 <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 /> LC5 continued 9090224-BS1 <br />_Methyl tert-_butyl ether _ 9/22/99 !0 0 __ 1! 7 ug/l —_ 700-130 I_I 7 ____ __ - _ <br /> Surrogate a a a-Trifluorotoluene 100 IO 3 60 0-140 143 <br /> Matrix Spike 9090224-MS1 5909193-02 <br /> Benzene 9/22/99 10 0 ND 8 83 ugll 60 0-140 88 3 <br /> Toluene 10 0 ND 880 600-140 880 <br /> Ethylbenzene 10 0 ND 889 600-140 889 <br /> Xylenes(total) 300 ND 268 600-140 893 <br /> Methyl tert-butyl ether 100 ND 13 6 _ 600-140 _1_36 <br /> Surrogate a a,a-Trifluorotoluene 100 10 8 60 0-140 108 <br /> Matrix Spike Dup 9090224-MSD1 5909193-02 <br /> Benzene 9/22199 10 0 ND 8 78 ug/l 60 0-140 87 8 25 0 0 568 <br /> Tob a 10 0 ND 882 60 0-140 882 25 0 0 227 <br /> ne 10 0 ND 893 600-140 893 25 0 0 449 <br /> X encs(tato/) 30 0 ND 26 2 60 0-140 873 25 0 227 <br /> Methyl tort-butyl ether 100 ND 142 600-140 142 25 0 432 _4 <br /> Surrogate a,a,a-Trifluorotoluene 100 102 600-140 102 <br /> Batch 9090242 Date Prepared 9/22199 Extraction Method EPA 5030E PIT <br /> Blank 9090242-BLKI <br /> Purgeabie Hydrocarbons 9122/99 ND ug/1 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 tent-butyl ether _ ND _ 500 <br /> Surrogate a,a,a-Trrfluorotoluene 100 10 3 60 0-140 103 <br /> LCS 9090242-BSI <br /> Benzene 9/22/99 10 0 9 47 ug/1 70 0-130 94 7 <br /> Toluene 100 926 700-130 926 <br /> Ethylbenzene 100 9 19 700-130 91 9 <br /> Xylenes(total) 300 273 700-130 91 0 <br /> Methyl tent-butyl ether _ too-- - __ _ 939 700-130 939 <br /> Surrogate a a a-Trifluorotoluene 10 0 101 600-140 101 <br /> Matrlx_Splke 9090242-MSI 5909173-10 <br /> Benzene 9/22199 10 0 ND 4 88 ug/1 GO 0-140 98 8 <br /> Toluene 100 ND 9 75 600-140 975 <br /> Ethv enzene to 0 ND 971 600-140 97 1 <br /> Se4iWa Analytical-Sacramento *Refer to end of report for test of notes and definitions <br /> Page 9 of 12 <br />