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Sequoia 819 Stnker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical www squoFAX equoiaabs labs c00 <br /> OW <br /> com <br /> Delta Environmental Consultants(Rancho Cordova Protect Arco 2130, Stockton, CA <br /> 3164 Gold Camp Drive Ste 200 ProjectNumber N/A [reported <br /> Rancho Cordova CA,95670 Protect Manager Jay Johnson 04/02/01 11 56 <br /> BTEX by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spoke Source %REC RPD <br /> Analyte Result Limit UmSs Lv ei Result %PEC Limits RPD Limit [votes <br /> Batch 1030379 -EPA 5030B [P/TJ <br /> Blank(1030379-BLKl) Prepared&,Analyzed 03/28/01 <br /> Benzene ND 200 ug/l <br /> Toluene ND 200 " <br /> Ethylbenzene ND 200 " <br /> Xylenes(total) ND 200 " <br /> Surrogate 1,2-DCA-d4 419 500 838 60-140 <br /> Surrogate Toluene-d8 53 7 500 107 60-140 <br /> Surrogate 4-BF8 558 -)00 112 60-140 <br /> LCS(1030379-BSI) Prepared Analyzed 03/28/01 <br /> Benzene 493 2 00 ug/1 50 0 98 6 70-130 <br /> Toluene $43 2 00 300 109 70-130 <br /> are 1,2-DCA-d4 420 500 840 60-140 -- <br /> Sur ogate Toluene-d8 53 3 500 107 60-140 <br /> Surrogate 4-BFB .567 .500 113 60-140 <br /> Matrix Spike(1030379-MSI) Source 5103323-01 Prepared&Analyzed 03/28/01 <br /> Benzene 491 200 ug/l 500 ND 982 70-130 <br /> Toluene 53 8 200 " 500 ND 108 70-130 <br /> Surrogate 1,2-DCA-d4 442 7, 500 884 60-140 <br /> Surrogate Toluene-d8 529 500 106 60-140 <br /> Surrogate 4-BFB -)60 500 112 60-140 <br /> Matrix Spike Dup(1030379-MSDI) Source S103323-01 Prepared&Analyzed 03/28/01 <br /> Benzene 493 200 ug/l 500 ND 986 70-130 0 407 25 <br /> Toluene 54 l 2 00 500 ND I08 70-130 0 556 25 <br /> Surrogate 1 2-DCA-d4 437 <br /> 500 874 60-140 <br /> Surrogate Toluene-d8 -533 500 107 60-140 <br /> Surrogate 4 BFB -�7 1 500 114 60-140 <br /> la 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 /> Pa.ge 10 of 14 <br />