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r. <br /> 819 Striker Avenue Suite 8 <br /> 1 Sequoia Sacramento CA 9 9600 <br /> (916)921 9600 <br /> FAX(916)921-0100 <br /> Analytical www 5equoialabs corn <br /> SECOR International-Rancho Cordova Project ARCO 434,Lodt,CA Sampled 4128100 <br /> 3017 Ktigore Road,Suite 100 Project Number N/A Received 512100 <br /> Rancho Cordova,CA 95670 Pro ect Manager Rusty Benkosky Reported 5115100 <br /> MTBE 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 0050105 Date Prepared 519100 Extraction Method EPA 50308 IPITI <br /> Blank 0050105-BLK1 <br /> Methyl tert-butyl ether 519/00 ND ug/l 200 <br /> Surrogate 12-DCA-d4 11500 618 600-140 124 <br /> LCS 0050105-BS1 <br /> Methyl tert-butyl ether 5/9100 500 482 ug/1 700-130 96 4 <br /> Surrogate 12-DCA-d4 " 500 642 600-140 128 <br /> Matrix Spike 0050105-MSI 5005014-01 <br /> Methyl tert-butyl ether 519100 500 ND 502 ug/l 600-140 100 _ __--- <br /> Surrogate 1 2-DCA-d4 11500 556 600-140 111 <br /> Spike Duo 0050105-MSD1 S005014-01 <br /> NW tert-butyl ether 519100 500 ND 528 ug/l 600-140 106 250 583 <br /> Surrogate 1,2-DCA-d4 11500 590 " 600-140 118 <br /> Batch 0050119 Date Prepared 5110100 Extraction Method EPA 5030B PIT <br /> Blank 0050119-BLK1 <br /> Methyl tert-butyl ether 5110100 ND_ ug11 200 <br /> Surrogate 1,2-DCA-d4 11 500 568 600-140 114 <br /> LCS 0050119-BS1 <br /> Methyl tert-butyl ether 5110100 500 464 ug/1 700-130 928 <br /> Surrogate 1,2-DCA-d4 500 602 600-140 120 <br /> _Matrix Spike 0050119-MSI 5005157-51 <br /> Methyl tert-butyl ether5110100 500 ND 450 ug/1 60 0-140 90 0 ___ _` __ _ <br /> Surrogate 1,2-DCA-d4 _ 11 50 0 494 r' 600-140 �98 8 <br /> Matrix Spike Dap 0050119-MSD1 5005157-51 <br /> Methyl tert-butyl ether 5110100 500 ND 484 ug/1 600-140 _ 968 250 728 <br /> Surrogate 1,2-DCA-d4 500 540 't 600-140 108 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 7 of 8 <br />