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. • 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> 4D-V Analytical FAX(916)9z1-0100 <br /> SECOR International-Sacramento Protect ARCO 434, Lodi,CA Sampled 1/21/00 <br /> 9912 Business Park Dr Ste 100 Project Number 077 41909 050 Received 1121/00 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 2/3/00 <br /> MTBE by EPA Method 8260A/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 /> Batch 0010243 Date Prepared 1/26100 Extraction Method EPA 5030B IPS <br /> Blank 0010243-BLKI <br /> Methyl tert-butyl ether 1/26/00 — —_ ND - ug/l — 2 00 <br /> Surrogate 1 2-DCA-d4 T - 500 556 600-140 111 <br /> Blank 0010243-BLK2 <br /> Methyl tett-butyl ether t/27/00 _ ND ug/I 200 - <br /> Surrogate i 2-DCA-d4 — 500 u S40 600-140 108 <br /> LCS 0010243-BS 1 <br /> Methyl tent-_butyl ether1126/00 _ 50 0 - _ _51 8_ ug/l �___70 0-130 _ 104 <br /> _ _ _ _ - <br /> Surrogate 12-DCA-d4 v 1150 0 57 2 — 1160 0-140 114 <br /> t�imLCS Du 0010243-BSD1 <br /> tert-butyl ether 1/26/00 500 536 ug/l 700-130 107 250 284 _ <br /> SuNWate 12-DCA-d4 500 592 600-140 118 — <br /> Matrix_Sp i ke 0010243-MS1 5001274-01 <br /> _Methyl tert-butyl ether _ _ 1/26100 50 0 —ND 546 ug/I 600-140 109 _ _ — <br /> Surrogate 1,2-DCA-d4 500 592 600-140 118 <br /> Matrix Spike Dun 0010243-MSD1 5001274-01 <br /> Methyl tent-butyl ether I/26100 500 ND 558 ug/l 600-140 112 25 0 271 <br /> Surrogate 1,2-DCA d4 500 602 60 0-140 120 <br /> 0 <br /> Sequoia Analytical-Sacramento 'Refer to end of report for text of notes and definitions <br /> Page 7of8 <br />