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t <br /> 404 N Wiget Lane <br /> DS e qu o i a Walnut Geek CA 94598 <br /> (925)98&9600FAX(925)988-9673 <br /> , - Analytical www sequolalabs t <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 0 9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12-Mar-01 08 00 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> --Sequoia Analytical=Walnut Creek <br /> Reporting--------- Spi c—Sourcc—%REC-----------RP]) <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1C04001 -EPA 5030B [PIT] <br /> Blank(lC04001-BLK1) Prepared&Analyzed 04-Mar-01 <br /> t _ <br /> Purgeable Hydrocarbons _ _ _ -_ _ ND _ -- _50-_ug/l-_ -- <br /> Benzene ND 0 50 <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-Tnfluorotoluene 305 300 102 70-130 <br /> LCS(1C04001-BS1) Prepared&Analyzed 04-Mar-01 - <br /> Benzene 205 050 ug/1 200 103 70-130 <br /> Toluene 214 050 " 200 107 70-130 <br /> Ethylbenzene - 219 050 200 109 _ t 70-130 <br /> Xylenes(total) 6518 0 50 " 600 110 70-130 <br /> Surrogate a,qa-Tnfluorotoluene 320 11300 107 70-130 <br /> Matrix Spike(1C04001-MS1) Source W103066-12 Prepared&Analyzed 04-Mar-01 <br /> Benzene _21_2 0 50 ug/l _ 2_0 0___ND_ _106___ 70_-130 _ <br /> Toluene- — - --_ _- - - 220 —=050- --" -� --200 ND �110 70-130 <br /> -Ethylbenzene— __ —_ _ TY__--22 4— �0 50----"µ." _-20 0 ND__l l2-7a 130—_ <br /> Xylenes(total) 677 050 600 ND 113 70-130 <br /> Surrogate a qa-Tnfluonato&eiw- - 321 300 107 70-130 <br /> i <br /> Matrix Spike Dup(1C0400I-MSD 1) Source W103066-12 Prepared&Analyzed 04-Mar-01 <br /> ------Benzene 20 8 0 50—ug/1 20 0 ND 10470-1301 90— <br /> Toluene <br /> 0 Toluene 21 5 050 200 ND 108 70-130 230 20 <br /> Ethylbenzene 219 050 200 ND 109 70-130 226 20 <br /> Xylenes(total) 664 050 600 ND 111 70-130 194 20 <br /> Surrogate aa,a-Tnfluorotoluene 319 300 106 70-130 <br /> i <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the aamples analyzed in accordance with the chain o <br /> - - custody document This analytical report must be reproduced to its entirety <br /> Page 10 of 21 <br />