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404 N V figet Lane <br /> Sequoia "'a'"` `( 94598 <br /> 9225)9eek 988&99 <br /> FAX(925)988-%73 <br /> 1-5)- 600 <br /> Analytical www seguolalabsCOM <br /> er Ryan,hlc -Dublin Project Chevron <br /> I <br /> 7 Sl M Court Suite J Project Number Chevron#9-2033 Reported <br /> hn CA,94568 Project Manager Deanna L Harding 02-Jan-01 47 35 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br />[Analyte Result Lunt Units Level Result %REC Lim is RPD Lunit Notes <br /> Batch OL11002-EPA 5030B [PIT] <br /> Blank(OL11002-BLKI) Prepared&Analyzed ll-Dec-00 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 5 " <br /> Surrogate gga-Tnfluorotoluenne 318 300 109 70-130 <br /> LCS(OL11002-BSI) Prepared&Analyzed 11-Dec-0O <br /> Benzene 179 050 ug/l 200 895 70-130 <br /> Toluene 180 050 " 200 900 70-130 <br /> Ethylbenzene 180 050 200 900 70-130 <br /> yddmes(total) 541 050 600 902 70-130 <br /> 3wo'gate ima-Trnfluorotoluene 179 300 930 70-130 <br /> Matra Sp&e(OL11002 MSl) Source W012061-15 Prepared&Analyzed 11-Dec-0O <br /> Benzene 19 6 050 ug/l 200 ND 980 70-130 <br /> Toluene 198 050 200 ND 990 70-130 <br /> Ethylbenzene 197 050 200 ND 985 70-130 <br /> Xylenes(total) 584 050 600 ND 973 70-130 <br /> Surrogate ama-Tnfluorotoluene 323 300 108 70-130 <br /> Matra Spike Dup(OL11002-MSD1) Source W012061-15 Prepared&Analyzed 1l-Dec-00 <br /> Benzene 172 050 ug/l 200 ND 860 70-130 13 0 20 <br /> Toluene 171 050 200 ND 855 70-130 146 20 <br /> Ethylbenzene 171 050 200 ND 855 70-130 141 20 <br /> Xylenes(total) 514 050 600 ND 957 70-130 128 20 <br /> Surrogate qqa-Tnfluorotoluene 18.4 300 947 70-130 <br /> Sequoia An21yt1Cdl-walnut Creek The results to flus report apply to the samples analyzed in accordance with the chain of <br /> custody document TMs analytical report must be reproduced to its entirety <br /> Page 8 of 16 <br />