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819 Stoker Avenue Suite 8 <br /> 1 Sequoia Sacramenta,CA 95834 <br /> (916)921-9600 <br /> 921-0100 <br /> Analytical <br /> FAX equ alabsc corn www sequaia]aUs corn <br /> • <br /> Stratus Environmental Project ARCO 2168, Stockton,CA Sampled 6/22100 <br /> 3330 Cameron Park Drive, Ste 550 Project Number N/A Received 6/23/00 <br /> Cameron Park,CA 95682 Prolect'vlanager Jay Johnson Reported 7/11/00 <br /> Volatile Oxygenate Compounds by 1rPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Emits Recov Limits % Limit % Notes* <br /> Batch 0060286 Date Prepared 6/29/00 Extraction Method EPA 5030E 1P/JT <br /> Blank 0060286-B LKI <br /> Pert-butyl alcohol 6/29100 ND ug/1 200 <br /> Methyl tert-butyl ether ND 2 00 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tett-amyl methyl ether ND 200 <br /> Ethanol _ ND_ _ 3000 _ <br /> Surrogate I 2-DCA-d4 50 0 '14 600-140 103 <br /> LCS 0060286-BSI <br /> Methyl Cert-butyl ether 6/29/00 500 500 ug/l 700-130 100 <br /> Surrogate 1,2-DCA-d4 „ 500 528 600-740 106 <br /> LCS Dup 0060286-BSD1 <br /> Nghwl tert-butyl ether _ 6129/00 500 49 6 ug/1 _ 700-130 992 250 0 903 <br /> gate 1 2-DCA-d4 11 .500 52 8 600-140 106 41 <br /> Matrix Spike 0060286-AISI S006320-05 <br /> Methyl tort-Butyl ether _ 6129/00 500 ND 520 ug/1 600-140 104 <br /> Surrogate 12-DCA-d4 50 0 __-- 53$ 600-140 108 ---- <br /> Matrix Spike Duni 0060286-MSD1 5006320-OS <br /> Methyl tert-butyl ether _6/29/00 500 ND 53 6 ug/1 60 0-140107 250 284 <br /> Surrogate 1 2-DCA-d4 500 56 4 " 600-140 113 <br /> Batch 0060288 Date Prepared 7/3/00 Extraction Method EPA 503013 [P/TI <br /> Blank 0060288-13 LKI <br /> Tert-butyl alcohol 7/3/00 ND ug/1 200 <br /> Methyl tert-butyl ether SID 200 <br /> Di-isopropyl ether " Nl) 200 <br /> Ethyl tent-butyl ether TSD 200 <br /> Tert-amyl methyl ether PSD 200 <br /> Ethanol PSD 3000 <br /> Surrogate 1 2-DCA44 50 0 ---- 5Y, 6 600-140 111 Y - <br /> LCs 0060288-BSI <br /> Methyl tert-butyl ether �_ 713/00 500 460 ug/1 700-130 920 <br /> Surf agate 1 2-DCA-d450 0 560 60 0-140 112 <br /> LCS Dup 0060288-BSDI <br /> Methyl tert-butyl ether 7/3100 500 446 ug/I 700-130 892 250 3 09 <br /> SIW Analytical-Sacramento *Refer to end ofreport for text of notes and definitions <br /> Page 13 of 15 <br />