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Sequoia <br />Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-4111 <br />(650) 232-9600 <br />FAX (650) 232-9612 <br />Blaine Tech Services <br />Project <br />Chevron(3) <br />Sampled <br />6121199 <br />1680 Rogers Avenue <br />Project Number <br />Chevron 9-5775/99062]R-3 <br />Received <br />6123199 <br />San Jose, CA 95112 <br />Project Manager <br />Christine Lithe <br />Reported <br />7112199 <br />Total'k4ieable,Ef di'ocarbons,(C6 C12), BT�EXL ii AITBE�by HS ISUFTIQuali€yCirniroI <br />eiauom Analytical -San Carlos <br />Date Spike Sample QC Reporting Litmt Recov RPD RPD <br />Analvte Analvzed Level Result Result Units Recov Limits % Limit % Notes* <br />Batch 9060151 <br />Blank <br />Purgeable Hydrocarbons as Gasoline <br />Benzene <br />Toluene <br />Ethylbenzene <br />Xylenes (total) <br />Methyl tert-butyl ether <br />Surrogate a,a,a-Trtfluorotoluene <br />Date Prepared 6/27199 <br />9060151-BLK1 <br />6/27/99 <br />Ff 100 <br />Extraction Method EPA 5030B fP/TI <br />ND <br />ug/l <br />500 <br />ND <br />It <br />0 500 <br />ND <br />It <br />0 500 <br />ND <br />" <br />0 500 <br />ND <br />600-140 <br />0 500 <br />ND <br />if100 <br />500 <br />793 <br />829 <br />700-130 793 <br />LCS 9060151 -BSI <br />Purgeable Hydrocarbons as Gasoline 6/27/99 250 249 ug/l 700-130 996 <br />Surrogate a,a,a-Trifluorotoluene rr100 988 1,700-130 988 <br />9060151 -MSI L906287-06 <br />as Gasoline 6/27/99 250 ND 269 ug/l 600-140 108 <br />Surrogate a,a,a-Trifluorotoluene 100 942 It700-130 942 <br />Matrix Spike Dup <br />9060151-MSD1 <br />L906287-06 <br />Purgeable Hydrocarbons as Gasoline <br />6/27199 <br />250 <br />ND <br />235 <br />ug/1 <br />600-140 <br />940 250 139 <br />Surrogate a a,a-Trifuorotoluene <br />if100 <br />829 <br />pp <br />700-130 <br />829 <br />Batch 9060153 <br />Date Prepared <br />6128/99 <br />Extraction Method EPA 5030E T91 <br />Blank <br />9060153-BLKI <br />Purgeable Hydrocarbons as Gasoline <br />6128/99 <br />ND <br />ug/l <br />500 <br />Benzene <br />" <br />ND <br />" <br />0 500 <br />Toluene <br />ND <br />0 500 <br />Ethylbenzene <br />ND <br />" <br />0 500 <br />Xylenes (total) <br />ND <br />0 500 <br />Methyl tert-butyl ether <br />ND <br />500 <br />_ <br />Surrogate a,a a-Trifluorotoluene <br />100 <br />103 <br />700-130 <br />103 <br />LCS <br />9060153 -BSI <br />Benzene <br />6128/99 <br />100 <br />9 24 <br />ugll <br />700-130 <br />924 <br />Toluene <br />100 <br />845 <br />700-130 <br />845 <br />Ethylbenzene <br />100 <br />898 <br />700-130 <br />898 <br />Xylenes (total) <br />300 <br />271 - <br />_ 700-130 <br />903 <br />Surrogate a,a a-Trifluorotoluene <br />100 <br />103 <br />700-130 <br />103 <br />Matrix Spike <br />9060153 -MSI <br />L906314-02 <br />Benzene <br />6/28/99 <br />100 <br />ND <br />8 94 <br />ug/l <br />600-140 <br />894 <br />Tdiuene <br />" <br />100 <br />ND <br />847 <br />" <br />600-140 <br />84.7 <br />Analytical - San Carlos <br />*Refer to end of report for text of notes and definitions <br />Page 7of11 <br />