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® Sequoia 8i9 Striker Avenue 8 <br /> 958 <br /> Sacramento CA 95834 <br /> (916) 921-9600 <br /> A FAX(916)921-0100 <br /> ftotfnal ytical wnvw sequolalabs com <br /> • J <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA, 95682 Project Manager .Tay Johnson 04/04/02 13 51 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2430350-EPA 5030B [PIT) <br /> Blank(030350-BLKI) Prepared&Analyzed 03/27/02 <br /> Tert-butyl alcohol ND 5 0 ug/1 <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether NO 050 " <br /> Tort-amyl methyl ether ND 050 " <br /> Surrogate 12-DCA-d4 v 331 250 732 60-140 <br /> LCS(2030350-BSI) Prepared&Analyzed 03/27/02 <br /> Methyl tert-butyl ether 326 050 ug/l 250 130 60-140 <br /> Surrogate 1 2-DCA-d4 _ 303 11250 121 60-140 <br /> dk�trix Spike(203 03 50-MS 1) Source 5203419-09 Prepared &Analyzed 03/27/02 <br /> 'qWethyl tert-butyl ether 314 050 ug1] 250 ND 126 60-140 <br /> Surrogate 12-DCA-d4 304 11250 122 60-140 <br /> _Matrix Spike Dup(2030350-MSD1) _ _ Source 5203419-09 Prepared&Analyzed 03/27/02 <br /> Methyl tert-butyl ether 31 6 050 ugA 250 ND 126 60-140 0 635 25 <br /> Surrogate 12-DCA-d4 323 _ 250 129 60-140 _ W <br /> gtioia Analytical- Sacramento The results 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 8 of 9 <br />