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Sequoia <br />4%p Analytical <br />Blaine Tech Services <br />1680 Rogers Avenue <br />San Jose, CA 95112 <br />Project Shell(l) <br />Project Number Shell 620 W Charter Way, Stockton <br />'rotect Manager Fran Thee <br />1551 Industrial Road <br />San Carlos CA`94070-49 11 <br />(650) 232-9600 <br />FAX (650) 232-961 Z <br />Sampled 5/25/99 <br />Received 5/26/99 <br />Reported 6/22/99 <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 />Analyte Analyzed Level Result Result Units Recov Limits % Limit %Notes* <br />LCS 9060035 -BSI <br />Purgeable Hydrocarbons as Gasoline 6/6/99 250 255 ug/l 700-130 102 <br />Surrogate a,a,a-Trifluorotoluene 11100 171 " 700-130 171 2 <br />Matrix Spike 9060035-MS1 L905530-07 <br />Purgeable Hydrocarbons as Gasoline 6/6199 250 ND 246 ug/l 600-140 984 <br />Surrogate aa a-Trifluorotoluene Ff100 120 If700-130 120 <br />Matrix S ike Duo 9060035-MSD1 L905530-07 <br />Purgeable Hydrocarbons as Gasoline 6/6/99 250 ND 251 ug/l 600-140 100 250 161 _ <br />Surrogate a,a,a-Trit7uoroto1uene If100 112 700-130 112 <br />Batch 9060036 <br />Date Prepared „616/99 <br />Extraction Method EPA 5030B IPM <br />Blank <br />9060036-BLK1 <br />Purgeable Hydrocarbons as Gasoline <br />Purgeable Hydrocarbons as Gasoline <br />6/6199 <br />ND <br />ug/l Soo <br />Benzene <br />101 <br />ND <br />0 500 <br />Toluene <br />105 <br />ND <br />0 500 <br />Ethylbenzene <br />Matrix -Spike <br />ND <br />0 500 <br />Xylenes (total) <br />ND <br />0 500 <br />Methyl tert-butyl ether <br />_ <br />ND <br />500 <br />Surrogatea a,a-Trrfluorotoluene <br />10 0 <br />8 23 <br />_ <br />70 0-130 823 <br />LCS <br />9060036-BS1 <br />Purgeable Hydrocarbons as Gasoline <br />6/6/99 <br />250 <br />253 <br />ug/l <br />700-130 <br />101 <br />Surrogate a,a,a-Trifluorotoluene <br />11100 <br />105 <br />700-130 <br />105 <br />Matrix -Spike <br />9060036 -MSI <br />L905530-06 <br />Purgeable Hydrocarbons as Gasoline <br />6/6/99 <br />250 ND <br />248 <br />ug/l <br />600-140 <br />992 <br />Surrogate a,a,a-Trrfluorotoluene <br />to100 <br />844 <br />to700-130 <br />844 <br />Matrix Spike Duv <br />9060036-MSD1 L905530-06 <br />Purgeable Hydrocarbons as Gasoline <br />6/6/99 <br />250 ND <br />236 <br />ug/l <br />600-140 <br />944 250 496 <br />Surrogate a aa-Trifluorotoluene <br />it100 <br />863 <br />It700-130 <br />863 <br />Batch 9060040 <br />Date Prepared <br />617/99 <br />Extraction Method EPA 5030B IP/TI <br />Blank <br />9060040-BLK1 <br />Purgeable Hydrocarbons as Gasoline <br />6/7/99 <br />ND <br />ug/l <br />500 <br />Benzene <br />6/9/99 <br />ND <br />0 500 <br />Toluene <br />ND <br />0 500 <br />Ethylbenzene <br />ND <br />0 500 <br />Xylenes (total) <br />ND <br />0 500 <br />Methyl tert-butyl ether <br />ND <br />500 <br />Sequoia Analytical - San Carlos *Refer to end of report for text of notes and def nttronO <br />Page 13 of 16 <br />w <br />