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404 N W S'et Fane <br /> Sequoia "'�""�`(925)988-96W <br /> FAX(925)988-9673 <br /> k Analytical '"'"""�"°`a'��m <br /> i}ettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal# 1205 Reported <br /> Dublin CA,94568 Project Manager Dean=L Harding 08-Feb-01 07 55 <br /> Total Purgeable Hydrocarbons (C6-Cl2),BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Pleportng Spike Source %REC RPD <br /> Analyte Result Luna Units Level Result %REC Ltmtts RPD Limit Notes <br /> Batch 1B07001-EPA 5030B[PIT] <br /> Blank(1B07001-BLKI) Prepared&Analyzed 07-Feb-01 <br /> Purgeable Hydrocarbons ND so ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 030 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate %cw4wfluorotohune 3d8 300 103 70-130 <br /> LCS(1B0700I BS1) Prepared&Analyzed 07-Feb-01 <br /> Benzene 188 050 ug/l 200 940 70-130 <br /> Toluene 195 050 200 975 70-130 <br /> Eth lbenzene 205 050 200 103 70430 <br /> es(total) 614 050 600 102 70-130 <br /> Surrogate a a,a-7YtJluorotohrene 293 30.0 977 70.130 <br /> Matra Spike(1B07001-MSI) Source W101691-01 Prepared&Analyzed 07-Feb-01 <br /> Benzene 204 050 ug/l 200 ND 102 70-130 <br /> Toluene 209 050 200 ND 104 70-130 <br /> gthylbenzene 216 050 n200 ND 108 70-130 <br /> Xylenes(total) 644 050 600 ND 107 70-130 <br /> Surrogate rtaa-D Ifluorotohrene 318 300 106 70-130 <br /> Matra Spike Dup(1B07001-MSDl) Source W101691-01 Prepared&Analyzed 07-Feb-01 <br /> Benzene 190 050 ug/l 200 ND 950 70-130 711 20 <br /> Toluene 199 050 200 ND 995 70-130 490 20 <br /> Ethylbenzene 209 050 200 ND 104 70-130 377 20 <br /> xylenes(total) 62.6 050 600 ND 104 70-130 283 20 <br /> Surrogate qqa-7V7uorotohtem 306 300 102 70.130 <br /> 1101a Analytltal-Walnut Cmek The results m flus report apply to the samples analysed m accordmrc+e with the churn of <br /> custody docurmnt.Tids mu dyncal report must be reproduced m its emmety <br /> Page 12 of 14 <br />