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!D Sequoia 819 Striker Avenue, Suite 8 <br /> 4 <br /> Sacramento CA 95834 <br /> Analtical (916}921-9600 <br /> v >=Ax(916) 921-01oa <br /> NOi <br /> Upgradient Enviromental-Stockton Project Teresi Trucking Sampled 8119/99 <br /> P O Box 8002 Project Number N/A Received 8120199 <br /> Stockton,CA 95208 Project Manager Vic Cherven Reported 9/3/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9080207 Date Prepared 8/24199 Extraction Method EPA 5030B IP/TI <br /> Blank 9080207-BLKI _ - <br /> Tert-butyl alcohol 8/25/99 ND ug/1 200 <br /> Methyl tent-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 12-DCA-d4 500 530 600-140 106 <br /> LCS 9080207-BSI <br /> _Methyl tert-butyl ether 8/25/99 500 548 ugh 700-130 110 <br /> Surrogate 12-DCA-d4 11500 576 600-140 115 <br /> 5 Du 9080207-BSD1 <br /> hy1 ter#-butyl ether 8/25/99 500 _ 55 6 ug/I 700-130 1 11 25 0 0 905 <br /> Surrogate 12-DCA-d4� 11 500 568 600-140 114 <br /> Matrix Spike 9080207-MSI 5908237-01 <br /> _Methyl tert-butyl ether 8/25/99 500 ND 510 Ug/1 60 0-140 102 <br /> Surrogate 1,2-DCA-d4 11 500 530 600-140 106 <br /> Matrix Spike Dup 9080207-MSD1 5908237-01 <br /> Methyl tert-butyl ether 8/25/99 500 ND 528 ug/I 600-140 106 _2_5_0___3 85 <br /> Surrogate 1 2-DCA-d4 500 552 600-140 110 <br /> !Te—quoia Analytical- Sacramento .. *Refer to end of report for text of notes and def nttions <br /> Page 8 of 9 <br />