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885 Jarvis Drive <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> 308 <br /> Analytical FAx -equo 78bs com <br /> www sequoialabs coni <br /> Blame Tech Services(Chev) Project Chevron 9-9840 Sampled 319/00 <br /> 1680 Rogers Avenue Project Number 000309-A2(4344 Waterloo Rd Stockton) Received 3/10100 <br /> San lose CA 95112 Project Manager Scott Boor Reported 3/29/00 11 45 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch OC23002 Date Prepared 3123100 Extraction Method EPA 5030B IPITI <br /> Blank OC23002-BLK1 <br /> Purgeable Hydrocarbons 3/23/00 ND ug/1 Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 250 <br /> Surrogate a a a-Trifluarotoluene 100 109 70-130 109 <br /> LCS OC23002-BSI <br /> Purgeable Hvdrocarbons 3/23/00 239 ug/1 70-130 <br /> Surrogate a a,a-Tr fluorotoluene 100 8 64 70-130 86 <br />. LCS Dup OC23002-BSD1 <br /> Purgeable Hydrocarbons 3123/00 240 ug/1 70-130 25 0 418 <br /> Surrogate a a a-Tr:Jluorotoluene 10 0 10 7 _ 70-130 107 <br /> Sequoia Analvticai-,Morgan Hill *Refer to end of report Jor text of notes and definitions <br /> Page 5 of 8 <br />