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SS 1 (1 <br /> Sequoia WalCA 404 N 11lane <br /> Walnut Creek, CA 94598 <br /> Analytical FAX(925)988-9600 <br /> (925)988-9673 <br /> Gettler Ryan,Inc -Dublin Project Tosca <br /> 6747 Sierra Court Suite J Project Number Tosco(Unocal)#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 23-Nov-99 16 42 <br /> -T--r Total Purgeable Hydrocarbons(C6-C12}; BTEX and MTBE-by DHS LUFT- Quality-Control Y <br /> - - - - - - Sequoia Analytical - Walnut Creek I - - - <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Luruts RPD Limit Notes <br /> Batch 9K05002. Prepared 05-Nov-99 Usmg EPA 5030B [PIT] <br /> Blank(9K05002-BLK1) <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> \Methyl tart-butyl ether ND 25 " <br /> Surrogate a aa-Trrtfluorotoluene 299 300 997 700.130 <br /> LCS(9K05002-BSI) <br /> Benzene 237 050 ugJl 20 0 1 t9 70-130 <br /> 1 oluenc 193 050 " 200 965 70-130 <br /> Ethylbenzene 204 050 200 102 70-130 . <br /> \ylenes(total) 679 050 600 113 70-130 <br /> Suriogale o u a-Di luorotoluene 264 300 880 70-130 <br /> LCS Dull (9KO5002-BSDI) <br /> Benzene 251 050 ugll 200 126 70-130 574 20 <br /> Toluene 207 0 50 200 104 70-130 700 20 <br /> Ethylbenzene 20 9 0 50 200 104 70-130 242 20 <br /> \vlene%(total) 717 050 600 119 70.130 5 59 20 <br /> Surrogate a a a Trifluorotoluene 281 300 93 7 70-130 <br /> Batch 9KO8001 Prepared 08-Nov-99 Using EPA 5030E [PIT] <br /> BLink(9Kt18001-BLKI) <br /> Purvtble Hydroa,trbons ND 50 ug/I <br /> Benzene ND 050 <br /> lolu'n' ND 0 50 <br /> Ltlrvlbuizen, ND 050 <br /> \vkneN(total) ND 0 50 " <br /> NlLthvl tent-butyl i th�r ND 25 <br /> Surrogate carr-Prifluoiotoluene 273 300 910 70-130 <br /> Sequoia Analytical- Walnut Creek The results in das report apply to tie uanples analyzed to accordn"ce with the than o <br /> custody document This analytical reporr must be reproduced in i is entire* <br /> 4+eeg"eyro4letanL',g����� Page 15 of 19 <br />