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I I <br /> Sequoia 1551 Industrial Road <br /> San Carios,CA 94070-4111 <br /> 1650'232-9610 <br /> Analytical <br /> FAX(651)232-9612 <br /> EnvuronmeMtal Resolutions Project Tosco(1) Sampled 5/10/99t05/11/99 <br /> 74 Dagntal Drive,Suite 6 Project Number Tosco 76#5886/ERI.JOB#205504T7 Received 5/11/99 <br /> Novato,CA 94949 Project Manager Keith Romstad Reported 5/25/99 <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal Analyzed Level Result Result Units Recov Limits % Lumt % Nates* <br /> Batch 9050059 Date Prevared. 5113/99 Extraction Method EPA 5030$rPM <br /> Blank 9050059-BLKI <br /> Purgeable Hydrocarbons as Gasoline 5/13/99 ND ug/l 500 <br /> $enene ND " 0.500 <br /> Toluene ND 0.500 <br /> Ethylbeuzene " ND 0.500 <br /> Xylenes(total) ND O.SQO <br /> Surrogate sa,a-Tnfluorotoluene <br /> 100 752 600-140 752 <br /> LC--S- 9_BS1 <br /> Purgeable Hydrocarbons as Gasoline 5/13/99 250 259 ug/1 700-130 104 <br /> Surrogate aa a-Tnfluorotoluene " 100 761 600-140 761 <br /> _Matrix Snake 9050059_MS1 L905078-04 <br /> AftWeable Hydrocarbons as Gasoline 5113/99 250 994 377 119/1 600-140 111 <br /> gate a,a,a-Tnfluorotoluene ff 100 7 50 N 600-140 750 <br /> Matrix Spike Dun 9050059-MSD/ L905078-04 <br /> Pur9cable Hydrocarbons as Gasoline 5/13/99 250 994 357 119/1 600-140 103 250 7.48 <br /> Surrogate a,aa-Tnfluorotoluene " 100 768 N600-140 768 <br /> Batch: 9050069 Date Prepared: 5/15199 Extraction Method: EPA 5030E Wn <br /> Blank 9050069-BLKI <br /> Purgeable Hydrocarbons as Gasoline 5/15/99 ND 119/1 Soo <br /> Benzetne ND 0.500 <br /> Toluene M ND " 0.500 <br /> Ediylbenzene ND 0500 <br /> Xylenes(total) ND 0.500 <br /> Surrogate a,aa-Tnfluorotoluene <br /> 100 897 600-140 89 7 <br /> LCS 9050069-BS1 <br /> Purgeable Hydrocarbons as Gasoline 5/15/99 2S0 281 ug/1 700-130 112 <br /> Surrogate a,a,a-Tris luorotoluene " 100 834 600-140 834 <br /> Matrix Spike 9050069-MSI L905093-01 <br /> Purgeable Hydrocarbons as Gasoline 5/15/99 250 ND 273 119/1 600-140 109 <br /> Surrogate aaa-Thfluorotoluene " 100 862 600-140 862 <br /> Matrix Spike Duo 9050069-MSD1 L905093-01 <br /> Purgeable Hydrocarbons as Gasoline 5/15/99 250 ND 274 ug/1 600-140 110 250 0.913 <br /> Surrogate a,a,a-Tnfluorotoluene 100 840 " 600-140 840 <br /> 9eaquoia Analytical-San Carlos *Refer to end of report for text of notes and definrtions <br /> Page 4 of 6 <br />