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q 819 Striker Avenue, Suite 8 <br /> 1a) <br /> Sacramento CA 95834 quoia <br /> (9 t 6)921-9600 <br /> FAX(916)921-0100 <br /> 41111io— <br /> Analytical www sequolalabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number NIA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 08/29/01 15 31 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Dotes <br /> Batch 1080252-EPA 5030B (PIT] <br /> LCS(1080252-BSI) Prepared&Analyzed 08/23/01 <br /> Methyl tert-butyl ether 53 3 20 ug/l 500 307 60-140 <br /> Surrogate 1 2-DCA-d4 495 .500 990 60-140 <br /> Matrix Spike(1080252-MSI) Source S108141-01 Prepared&Analyzed 08/23/01 <br /> Methyl tert-butyl ether 546 20 ug/l 500 ND 109 60-140 <br /> Surrogate 12-DCA-d4 504 11500 101 60-140 <br /> Matrix Spike Dug(1080252-MSD1) Source 5108141-01 Prepared&Analyzed 08/23/01 <br /> Methyl tent-butyl ether 51 7 20 ug/1 300 ND 103 60-140 5 46 25 <br /> Surrogate 12-DCA-d4 490 500 980 60-140 <br /> &tch 1080289- EPA 5030B {P/TI <br /> Blank(1080289-BLI.KI)___- A _ -_ Prepared&Analyzed 08/27/01 - <br /> Tart-butyl alcohol ND 200 ug/l <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 20 <br /> Surrogate 12-DCA-d4 _ 454 .500 908 60-140 <br /> L_CS(1080289-BS1) Prepared&Analyzed 08/27/01 <br /> Methyl tert-butyl ether 515 20 USI] 500 103 60-140 <br /> Surrogate 1 2-DCA-d4 _ -- ---- -- 465 � A _" ` ��-500 --- ----- 930 60-I40 �---_ --�-T - - -- -- <br /> Am <br /> equola Analytical - Sacramento The i esults in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 12 of 14 <br />