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Sequoia <br />1 <br />Analytical <br />Walnut 94 98 <br />(925)988-9600 <br />600 <br />wFw 988-9673 fir, <br />ww.seququolala+bs coin <br />V <br />Gettler Ryan, Inc - Dublin Project. Unocal <br />6747 Sierra Court Suite J Project Number Unocal # 0123 Reported <br />Dublin CA, 94568 Project Manager Deanna L Harding 29 -Dec -00 07 40 <br />Total Purgeable Hydrocarbons (C6-Cl2), BTEX and'MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Lmut Notes <br />Batch 0120200 - EPA 5030B (PIT) <br />- <br />Blank (0120200-BLK1) <br />Prepared & Analyzed 17 -Dec -00 <br />Purgeable Hydrocarbon <br />ND <br />500 <br />U94 <br />Benzene <br />ND <br />0 500 <br />" <br />Tobjeae <br />ND <br />0 500 <br />" <br />Cyt <br />ND <br />0 500 <br />" <br />Xylen® (tour) <br />ND <br />0 500 <br />" <br />Methyl teat -butyl ether <br />ND <br />250 <br />" <br />Suta+agate ';I;a-T7rfflwA tohwM <br />102 <br />la o 102 60.140 <br />LCS (0120200-BS1) <br />Prepared & Analyzed 17 -Dec -00 <br />Benzene <br />103 <br />0 500 <br />ug4 <br />10 0 103 70-130 <br />Tehama <br />104 <br />0 500 <br />" <br />100 104 70-130 <br />&hyRnazene <br />103 <br />0 500 <br />100 103 70-130 <br />` <br />Xylauea (total) <br />309 <br />0 300 <br />300 103 70-130 <br />• <br />Methyl tart -butyl ether <br />925 <br />250 <br />100 92.3 70-130 <br />Surrogate im -7Yif uorotohmne <br />1a2 <br />la!0 _ 102 6aL140 <br />_ <br />Matrix Spice (0120200 -MSI) <br />Source W012167-01 <br />Prepared 17 -Dec -00 Analyzed. 18 -Dec -00 <br />�Beazene <br />—10-4 <br />0 500 =ugl1 _— <br />10 0 ND 104 60.140 <br />- - <br />—Tohiene <br />10 5- <br />0 500' <br />—10 o ND 10s 60=140 <br />—10-4--0 <br />500 <br />10 0 -ND 104 60-140 - <br />Xyl--r(tow) -- - - - -- - - <br />- <br />-- 31 0 - - <br />-- 0 500 <br />—"- - <br />- - 30 0 ----- ND - T_ 103- -- 60-140- - - - - - - <br />- - - — <br />ethyl teit^butyl other <br />M250 <br />903 <br />2 50 <br />" <br />10 0 ND 90 3 60-140 <br />Surrogate C44%0-7Hfhaorotohusne <br />IQs <br />la o 105 60440 <br />Matra Spike Dap (0120200 -NMI) <br />Source W012167-01 <br />Prepared. 17 -Dec -00 Analyzed 1&Dec-00 <br />Benzene <br />101 <br />0 500 <br />ugll <br />100 ND 101 60-140 293 <br />25 <br />TohX= <br />998 <br />0 500 <br />100 ND 99 8 60-140 508 <br />25 <br />Ethylbenzew <br />100 <br />0 500 <br />too ND 100 60.140 392 <br />25 <br />XYlenea (totd) <br />300 <br />0 500 <br />300 ND 100 60.140 329 <br />25 <br />Methyl test -butyl ether <br />8 13 <br />250 <br />100 ND 813 60-140 105 <br />25 <br />Swrosata ctµa-7YI/luorotohrsne <br />990 <br />10.0 990 60.140 <br />Sequoia Analytical - Walnut Creek The results in dds n port afply to dm sm opks analysed in acacordanew with the chain <br />custody document M andynieal report must be reproduced in its gtrpFr 0 <br />Page 14 of 17 <br />