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404 N Wlget lane <br /> Sequoia Walnut C(4 5)�4 <br /> 9600 <br /> FAX(925)988-9673 <br /> awAnalytical www sequo'alabs corn <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager P Le Chernmant 19-Jan-01 07 47 <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 Limit Units Level Result %REC Limits RPD Lunt Notes <br /> Batch lAO1001 -EPA 5030B [PIT] <br /> Blank(1A01001-BLKI) Prepared&Analyzed 01-Jan-OI <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 tert-butyl ether ND 25 <br /> Surrogate a,aa-Trrfluorotoluene 352 300 117 70-130 <br /> LCS(IAOI001-BSI) Prepared&Analyzed 01-Jan-01 <br /> Benzene 179 050 ug/I 200 895 70-130 <br /> Toluene 190 050 200 950 70-130 <br /> benzene 19 7 050 200 98 5 70-130 <br /> enes(total) 607 050 600 101 70-130 <br /> Surrogate a g a-Trrfluorotoluene 302 300 101 70-130 <br /> Matnx Spike(1A0100I-MSI) Source W012570-06 Prepared&Analyzed 01-Jan-01 <br /> Benzene 202 050 ug/I 200 ND 101 70-130 <br /> Toluene 203 050 200 ND 103 70-130 <br /> Ethylbenzene 21 2 0 50 200 ND 106 70-130 <br /> Xylenes(total) 63 7 0 50 600 ND 106 70-130 <br /> Surrogate a a a-Tnlluorotoluene 322 300 107 70-130 <br /> Matrix Spike Dup (1AOI001-MSD1) Source W012570-06 Prepared&Analyzed O1-Jan-01 <br /> Benzene 197 050 ugll 200 ND 98 5 70-130 2 51 20 <br /> Toluene 199 050 200 ND 995 70-130 2 97 20 <br /> Ethylbenzene 206 0 50 200 ND 103 70 130 287 20 <br /> Xylenes(total) 620 0 50 600 ND 103 70-130 270 20 <br /> Surrogate a a a-Tri luorololuene 321 300 107 70-130 <br /> uoia Analytical-Walnut Creek The results in this reporl apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 4 of 7 <br />