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819 Striker Avenue,Suite 8 <br /> Sequoia Sauam 916 95834 <br /> (9!6)9292 1-9600 <br /> 4 FAX(916)92 l-0100 <br /> Ci) <br /> C„) Analytical www,sequoialabs.com <br /> --9 <br /> GctLier-Ryan-Dublin Project: Chevron 9-0557,Stockton,CA Sampled: 5/17/00 <br /> 6747 Sierra Court,Ste. I Project Number: 386843 Received: 5/22/00 <br /> Dublin,CA 94568 Project Manager: Deanna L. Harding Reported: 6/6/00 <br /> Tatai Purgeable Hydrocarbons-(CgC12),BTEX add=MTBE-by°DHS,LUFT/Quality-Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Anal zed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 0050322 Date Prepared: 5/26/00 Extraction Method: EPA 5030E(MeOH) <br /> Blank 0050322-BLKI <br /> Purgeable Hydrocarbons 5/26/00 ND ug/l 50.0 <br /> Benzene ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene " ND " 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl Cert-butyl ether ND 2.50 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 11.0 60.0-140 110 <br /> LCS 0050322-BS 1 <br /> Benzene 5/26/00 10.0 10.4 ug/1 70.0-130 104 <br /> Toluene „ 10.0 10.4 70.0-130 104 <br /> Ethylbenzene 10.0 10.4 70.0-130 104 <br /> Xylenes(total) 30.0 31.3 70.0-130 104 <br /> Methyl tert-butyl ether 10.0 10.5 70.0-130 105 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 10.6 60.0-140 106 <br /> Matrix Strike_ _ 0050322-MS1 5005322-04 <br /> .Matrix <br /> - - -- --5126/00 16-6-ND�I0:2�ug/1�6010-140�102 <br /> Toluene 10.0 ND 9.73 to60.0-140 973 <br /> Ethylbenzene 10.0 ND 10.1 60.0-140 101 <br /> Xylenes(tom) 30.0 ND 30.3 " 60.0-140 101 <br /> Methyl tert-butyl ether 10.0 ND 11.4 60.0-140 114 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 11.5 60.0-140 115 <br /> Matrix Spike Dup 0050322-MSD1 S005322-04 <br /> Benzene 5126/00 10.0 ND 9.89 ugll 60.0-140 98.9 25.0 3.04 <br /> Toluene 10.0 ND 9.88 to60.0-140 98.8 25.0 1.53 <br /> Ethylbenzene 10.0 ND 10.5 n 60.0-140 105 25.0 3.88 <br /> Xylenes(total) 30.0 ND 31.3 60.0-140 104 25.0 2.93 <br /> Methyl tert-butyl ether 10.0 ND 11.8 n 60,0-140 118 25.0 3.45 <br /> Surrogate: a,a,a-Triuorotoluene 10.0 10.7 60.0-140 107 <br /> Batch: 0050324 Date Prepared: 5/26100 Extraction Method: EPA 50308 e0 <br /> Blank 0050324-BLKI <br /> Purgeable Hydrocarbons 5/26100 ND to 50.0 <br /> BenzeneIt 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 2.50 • <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 5 of 8 <br />