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819 Striker Avenue suite 8 <br /> - � i V Sacramento CA 99600 <br /> (916)921 9600 <br /> FAX(916)921-0100 <br /> Analytical www senuoialabs corn <br /> i <br /> Delta Environmental Con sultants(Cameron Park) Project ARCO 2168,Stockton,CA <br /> 3330 Cameron Park Dr ProjectNumber N/A Reported <br /> Cameron Park CA,95682 ProjectManager Jay Johnson 03/02/01 15 32 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Ltmtt Units Level Result °1REC Limits RPD Limit Notes <br /> Batch 1020282 -EPA 5030B [P/Tl <br /> Blank(1020282-BLKI) Prepared&Analyzed 02/27/01 <br /> Tert-butyl alcohol ND 200 ugA <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl test-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 <br /> 1,2-Dichloroethane ND 200 --�— <br /> Surrogate 1 2-DCA-d4 527 500 105 60-140 <br /> LCS 1020282-BS1 Prepared&Analyzed 02/27/01 <br /> Methyl tert-butyl ether 576 200 ugA 500 115 60440 <br /> 500 104 60-140 <br /> Oso <br /> gate 1 2-DCA d4-� 521 <br /> Dup(1020282-BSDI) -- Prepared& Analyzed 02/27/01 <br /> Methyl tent-butyl ether 603 200 ug/l 500 121 60-140 458 25 <br /> Surrogate 12-DCA-d4 535 — 50 0 107 60-140 <br /> Matrix Spike(1020282-MSI) Source S102255-02 Prepared&Analvzed 02/27/01 <br /> Methyl tert-butyl ether 56 1 200 ug/1F 500 ND 112 60-140 <br /> Surrogate 1 2-DCA-d4 506 500 101 60-140 <br /> Matrix Spike Dup(1020282-MSDI) Source S102255-02 Prepared&Analyzed 02/27/01 _ <br /> Methyl tert-butyl ether 585 200 ug/1 500 ND 117 60-140 4 19 25 <br /> Surrogate 12-DCA-d4 508 500 102 60-140 <br /> Batch 1020305-EPA 5030B [P/Tl <br /> Blank(1020305-BLK1) _ Prepared&Analyzed 02/28/01 <br /> Tert-butyl alcohol ND 200 ugA <br /> Methyl tert-butyl ether ND 200 " t <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 " <br /> 1,2 Dichloroethane ND 200 -� - _ <br /> Surrogate 12-DCA-d4 511 F " 500 ~-- 102 60-140 <br /> ooia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> castody document This analytical repo?t must be reproduced in its entirety <br /> Page 13 of 16 <br />