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4 ' Sequoia <br />� Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-4111 <br />(650) 232-9600 <br />FAX (650) 232-9612 <br />ame Tech Services Project Shell(1) Sampled 5/25/99 <br />1680 Rogers Avenue Project Number Shell 620 W Charter Way, Stockton Received 5/26/99 <br />San Jose, CA 95112 Project Manager Fran Thie Reported 6/22/99 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFTIQualaity Control <br />Sequoia Analytical - San Carlos <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes <br />Batch 9060026 <br />Date Prepared <br />614199 <br />Extraction Method EPA 5030B [PITI <br />Blank <br />Extraction Method EPA 5030E [PIT] <br />Blank <br />9060026-BLKI <br />Purgeable Hydrocarbons as Gasoline <br />6/6/99 <br />ND <br />ug/l 500 <br />Benzene <br />I,ND <br />Purgeable Hydrocarbons as Gasoline <br />6/4/99 <br />ND <br />ND <br />ug/1 <br />500 <br />ND <br />if0 500 <br />Benzene <br />41ND <br />ND <br />to0 500 <br />Methyl tert-butyl ether <br />to0 <br />500 <br />500 _ <br />~ <br />Surrogate a,a,a-Trifluorotoluene <br />Toluene <br />103 <br />700-130 103 <br />ND <br />0 500 <br />Ethylbenzene <br />ND <br />0 500 <br />Xylenes (total) <br />ND <br />0 500 <br />tert-butyl ether <br />ND <br />_ <br />_ 500 <br />_Methyl _ <br />Surrogate a a a-Trifluorotoluene <br />10 0 <br />106 <br />700-130 <br />106 <br />LCS <br />9060026-BS1 <br />Benzene <br />6/4/99 <br />100 <br />11 1 <br />ug/l <br />700-130 <br />111 <br />Toluene <br />100 <br />11 1 <br />700-130 <br />ill <br />Ethylbenzene <br />100 <br />114 <br />700-130 <br />114 <br />Xylenes (total) <br />_ <br />30_0 _ <br />324 <br />700-130 <br />1_08 <br />0rogate a a a-Tr{fluoro toluene _ <br />of <br />100 <br />10 7 <br />of70Y-T30 <br />107 <br />2trix Spike <br />9060026 -MSI <br />L906081-01 <br />Benzene <br />6/4/99 <br />100 <br />ND <br />10 6 <br />ug/l <br />600-140 <br />106 <br />Toluene <br />100 <br />ND <br />104 <br />It <br />600-140 <br />104 <br />Ethylbenzene <br />" <br />100 <br />ND <br />10 8 <br />600-140 <br />108 <br />Xylenes (total) <br />" <br />300 <br />ND <br />307 <br />" <br />_ 600-140 <br />_102 <br />Surrogate a a,a-Triuorotoluene <br />10 0 <br />957 <br />700-130 <br />95 7 <br />Spike Dun <br />9060026-MSD1 L906081-01 <br />_Matrix <br />Benzene <br />6/4/99 <br />100 <br />ND <br />100 <br />ug/l <br />600-140 <br />100 <br />25 0 5 83 <br />Toluene <br />11100 <br />ND <br />9 94 <br />11600-140 <br />99 4 <br />250 452 <br />Ethylbenzene <br />11100 <br />ND <br />104 <br />600-140 <br />104 <br />250 377 <br />Xylenes (total) <br />" <br />300 <br />ND <br />296 <br />600-140 <br />987 <br />250 329 <br />_ <br />Surrogate a,a,a-Trifluorotoluene <br />_ <br />"� <br />10 0 <br />950 <br />to <br />700-130 <br />95 0 <br />Batch 9060035 <br />Date Prepared: 6/6/99 <br />Extraction Method EPA 5030B [PITI <br />Blank <br />9060035-BLKI <br />Purgeable Hydrocarbons as Gasoline <br />6/6/99 <br />ND <br />ug/l 500 <br />Benzene <br />I,ND <br />0,0 500 <br />Toluene <br />ND <br />to0 500 <br />Ethylbenzene <br />ND <br />if0 500 <br />Xylenes (total) <br />ND <br />to0 500 <br />Methyl tert-butyl ether <br />ND <br />500 _ <br />~ <br />Surrogate a,a,a-Trifluorotoluene <br />100 <br />103 <br />700-130 103 <br />om Analytical - San Carlos *Refer to end of report for text of notes and definitions <br />Page 12 of 16 <br />0 <br />