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Sequoia 404 N CA Lane <br /> a Walnu#Creek CA 94598 <br /> (925)988-9600 <br /> 673 <br /> Analytical - w `quo 98bs com <br /> ,�,sequolalabs coin <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> -6747-Sierra Court-Scute J Project Number-Chevron#l-9_6171 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12-Jun-01 07 52 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source 'AREC RPD <br /> Analyte Result Limit Units Level Result %REC Lmnuts RPD Limit Notes <br /> Batch 1E31003--EPA 5030B PIT <br /> Blank(IE31003-BLK1) Prepared&Analyzed 31-May-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl Cert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 290 " 300 967 70-130 <br /> Blank(1E31003-BLK2) Prepared&Analyzed 02-Jun-Ol <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 1 • <br /> Ethylbewene ND 030 " <br /> Xylenes(total) ND 0 50 " - <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate 4aa-Tr7 luorotoluene 264 300 880 70-130 <br /> Blank(IE31003-BLK3) Prepared&Analyzed 04-Jun-01 <br /> Purgeable Hydrocarbons - --` ' - -ND— - ----50—50 --ug/I �- — — - — -- — -- ` <br /> Benzene ND 050 <br /> Toluene ND 050 - <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a a a-Tri luorotoluene 294 300 980 70-130 <br /> L_CS(I E31003-BS I) Prepared&Analyzed 31-May-Ol <br /> Benzene 214 050 ug/l 200 107 70-130 <br /> Toluene 191 050 200 905 70-130 <br /> Ethylbenzene 183 050 200 925 70-130 <br /> 551 0 50 _ 600 _ µ 91.8 70-130 _ <br /> Surrogate a a a-Trifluorotoluene 300 300 100 70-1.30 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the ch <br /> custody document This analytical report must be reproduced in its en <br /> Page 8 of 13 <br /> r9% <br />