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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento c95834 <br /> Z) (916)921-96W <br /> 1-9b00 <br /> 1 4 FAX(916)921-0100 <br /> Analytical vvww sequoialabs com <br /> i <br /> SECOR International-Rancho Cordova Project ARCO 2133, Stockton,CA Sampled 5125100 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 5/26/00 <br /> Rancho Cordova,CA 95670 Project Mama er Rusty Benkosky Reported 6/9100 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE in Air(ppmv) by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br />[Arialyte_ Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0050325 Date Prepared 5126/00 Extraction Method_EPA 5030E(P/T� <br /> Blank 0050325-BLK1 <br /> Purgeable Hydrocarbons 5/26/00 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) — - - - _ -- -- - --_ — ND --�„ _ ---0 0120- - <br /> Methyl tert-butyl ether _ _ ND 0 140 <br /> Surrogate ar a a-Trrfluorololuene 0 00200 0 00204 —60 0=140=102 <br /> i <br /> Sequoia Analytical-Sacramento *Refer to end of report far text of notes and deftnitto <br /> Page 5 of 6 <br />