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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento c 95834 <br /> ID (91 6)922 1-9600 <br /> FAX(916)921-0100 <br /> oqwr Analytical www sequoialabscorn <br /> Gettler-Ryan-Dublin Project Unocal 0187, Stockton,CA <br /> 6747 Sierra Court, Ste J Project Number C-Sparge Test "rtes <br /> Dublin CA 94568 Project Manager Paul LeCheminant 05/30/01 16 33 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spice Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1050346- EPA 5030B(PIT <br /> Blank(1050346-BL,K1) Prepared&Analyzed 05/29/01 <br /> Purgeable Hydrocarbons ND 500 ug/1 <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butvi ether ND 250 " <br /> Surrogate a a a-Trifluorotoluene 833 100 833 60-140 <br /> LCS(1050346-BSI) Prepared&Analyzed 05/29/01 <br /> Benzene 869 0 500 ug/I 100 869 70-130 <br /> uenr 943 0 500 ;i 100 943 70-130 <br /> ylbenzene 9 83 0 500 100 983 70-130 <br /> Xylenes(total) 30 1 0 500 300 100 70-130 <br /> Methyl tent-butyl ether 909 250 too 909 70-130 <br /> Surrogate a a a-Triuorotoluene 855 100 855 60-140 <br /> Matrix Spike(1050346-MS1) Source 5105292-15 Prepared&Analyzed 05/29/01 <br /> Benzene 889 0 500 ug/l 10 0 ND 88 9 60-140 <br /> Toluene 938 0 500 10 0 ND 938 60-140 <br /> Ethylbenzene 984 0 500 100 ND 98 4 60-140 <br /> Xylenes(total) 302 0 500 300 ND 101 60-140 <br /> Methyl tent-butyl ether 949 250 10 0 ND 949 60-140 <br /> Surrogate a a a-Trifluorotoluene 821 lo100 821 60-140 <br /> Matrix Spike Dup(1050346-MSD1) Source S105292-15 Prepared 05/29/01 Analyzed 05/30/01 <br /> Benzene 9 04 0 500 ug/i 10 0 ND 904 60-140 1 67 25 <br /> Toluene 994 0 500 100 ND 994 60-140 5 80 25 <br /> Ethylbenzene 976 0 500 100 ND 976 60-140 0 816 25 <br /> Xylenes(total) 295 0 500 300 ND 983 60-140 235 25 <br /> Methyl tent-butyl ether 967 250 100 ND 967 60-140 188 25 <br /> Surrogate a a a-Tris luorotoluene 803 100 803 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> , Page 5 of 6 <br /> per <br />