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Sequoia <br />4D <br />�w Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-41 11 <br />(650) 232-9600 <br />FAX (650) 232-9612 <br />7an <br />me Tech Services Project Shell(l) Sampled 5/25/99 <br />0 Rogers Avenue Project Number Shell 620 W Charter Way, Stockton Received 5/26/99 <br />Jose, CA 95112 Proiect Manager Fran Thie Reported 6122/99 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT/Quality Control <br />Sequoia Analytical - San Carlos <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />knalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes' <br />Blank (continued <br />9060040-BLKI <br />__ <br />_ _ <br />Surrogate a,a,a-Trifluorotoluene <br />6/9/99 <br />100 <br />_ _ <br />_ <br />105 <br />ug/1 <br />70 0-130 <br />105 <br />LCS <br />9060040-BS1 <br />Benzene <br />619/99 <br />105 <br />ug/l <br />700-130 <br />105 <br />Toluene <br />104 <br />71700-130 <br />104 <br />Ethylbenzene <br />105 <br />700-130 <br />105 <br />Xylenes (total) <br />_ <br />31 7 <br />" <br />_70 0-130 <br />106 <br />Surrogate a,a,a-Trifluorotoluene <br />100 <br />102 <br />700-130 <br />102 <br />Matrix Spike <br />9060040 -MSI <br />L905528-02 <br />Benzene <br />6/9/99 <br />100 <br />ND <br />9 78 <br />ug/l <br />600-140 <br />978 <br />Toluene <br />100 <br />ND <br />9 82 <br />600-140 <br />982 <br />Ethylbenzene <br />100 <br />ND <br />973 <br />600-140 <br />97.3 <br />Xylenes (total) <br />30_0 <br />ND <br />295 <br />_ <br />_ _60 0-14_0 <br />_98 3 <br />Surrogate a a a-Trifluorotoluene _ <br />100 <br />906 <br />700-130 <br />90 6 <br />Matrix Spike Dup <br />9060040-MSDI <br />L905528-02 <br />Benzene <br />6/9/99 <br />100 <br />ND <br />996 <br />ug/l <br />600-140 <br />996 <br />250 182 <br />Toluene <br />11100 <br />ND <br />100 <br />" <br />600-140 <br />100 <br />250 182 <br />Ethylbenzene <br />100 <br />ND <br />995 <br />" <br />600-140 <br />995 <br />250 2 24 <br />Xylenes (total) <br />300 <br />ND <br />302 <br />" <br />60 0-140 <br />101 <br />250 _ 271 <br />Surrogate a,a a-Trifluorotoluene <br />100 <br />892 <br />of700-130 <br />892 <br />Batch 9060088 <br />Date Prepared <br />6115199 <br />Extraction Method EPA 5030E <br />fP/Tl <br />Blank <br />9060088-BLKI <br />Purgeahle Hydrocarbons as Gasoline <br />6/IS/99 <br />ND <br />ug/l <br />500 <br />Benzene <br />ND <br />to0 <br />500 <br />Toluene <br />ND <br />to0 <br />500 <br />Ethylbenzene <br />ND <br />0 500 <br />Xylenes (total) <br />ND <br />0 500 <br />Methyl tent -butyl ether <br />ND <br />500 <br />Surrogate a,a,a-Triuorotoluene <br />100 <br />108 <br />700-130 <br />108 <br />LCS <br />9060088-BS1 <br />Purgeable Hydrocarbons as Gasoline <br />6115/99 <br />250 <br />230 <br />ug/1 <br />700-130 <br />920 <br />Surrogate a,a,a-Tnfluorotoluene <br />100 <br />167 <br />700-130 <br />167 <br />3 <br />Matrix Spike <br />9060088 -MSI <br />L905530-05 <br />Purgeable Hydrocarbons as Gasoline <br />6/16/99 <br />250 <br />ND <br />179 <br />ug/l <br />_60 0-140 <br />_ 716 <br />Surrogate a,a,a-Tr:fluorotoluene <br />If100 <br />110 <br />700-130 <br />110 <br />oia Analytical - San Carlos *Refer to end of report for text of notes and definitions <br />Page 14 of 16 <br />