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819 Striker Avenue Suite 8 •� <br /> Sequoia <br /> Sacramento 92 9600 <br /> FAX(916)921-0100 <br /> iwrAnalytical www sequotalabs Com <br /> 0 <br /> SECOR International-Rancho Cordova Project ARCO 2133, Stockton,CA Sampled 4126/00 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Received 4/27/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkoslcy Reported 5110/00 <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 /> rAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0050021 Date Prepared 4128/00 Extraction Method EPA 50308 PIT <br /> Blank 0050021-BLKI <br /> Purgeable Hydrocarbons 4128100 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) - - -- _ — --- - -� -- ND - - - - 00120 --- - - - — - <br /> Methyl tert-butyl ether ND 0 140 <br /> Surrogate —aa a-Trtfluorotoluene 0 00200 000186 •' 60 0-440-F93 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and defrnittons <br /> Page 5 of 6 <br />