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1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> vim' Analytical FAX(650)232-9600 <br /> (650)232-96E2 <br /> www sequotalaN com <br /> Gettler-Ryan/Geostrategies(l) Protect Unocal(4) <br /> 6747 Sierra Court, Suite J Protect Number Former Unocal#15098,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 07/01/02 07 46 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control r <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limns RPD Lunn Notes ' <br /> Batch 2060030-EPA 503flB PIT <br /> Blank(2060030-BLK2) - - Prepared&Analyzed 06/19/02 - <br /> p-Isopropyltoluene ND 20 ugA , <br /> Methylene chloride ND 50 " <br /> Naphthalene ND so " <br /> n-Propylbenzene ND 20 <br /> Styrene ND 20 " <br /> 1,1,1,2-Tetrachloroethane ND 20 " <br /> 1,1,2,2-Tetrachloroethane ND 20 " <br /> Tetrachloroethene ND 20 " <br /> Toluene ND 20 " <br /> I,2,3-Trichlorobenzene ND 20 <br /> 1,2,4-Trichlorobenzene ND 20 " <br /> 1,1,1-Trichloroethane ND 20 " <br /> 1,1,2-Trichloroethane _ ND 20 W <br /> Trichloroethene ND 20 <br /> Trichlorofluoromethane ND so " <br /> 1,2 3-Trichloropmpane ND 20 " <br /> _ 1 7 4-Trrmrthvlhrn7enr Wr_l 1)A " <br /> 1,3,5-Trimethylbenzene ND 20 <br /> Vinyl chloride T ND 20 " <br /> Total Xylenes- - =-- - -- - ---- -ND---- 2 0 -- ----- - — --- -- -- -- -- --==- - - --- - _ - --' <br /> _ Surrogate 1,2-Dichloroethane-d4 107 100 107 76-114 <br /> - Surrogate Toluene-d8 -- --- - - -- --=-9 88----_ =----J"- ----10 OY- -- 988- -88-410 - <br /> Surrogate <br /> 88=110 -Surrogate 4-BFB 922 100 922 86-175 <br /> LCS(2060030-BS2) Prepared&Analyzed 06/19/02 <br /> Benzen=e-- - '` "`_� __ _ _. _ -- 200 -�20 ug/l 200 - 100 70-130 l <br /> Chlorobenzene 202 20 200 101 70-130 ' <br /> 1,1-Dichloroethene 21 6 20 200 _ 108 65-135 <br /> Toluene- 206 20 y" 200 103 70-130 _ <br /> Tnchloroethene 204 20 200 102 70-130 ' <br /> Surrogate 12-Dichloroethane-d4 100 ]Go 100 76-114 <br /> Surrogate Toluene-d8 981 100 981 88-110 <br /> Surrogate 4-BFB - 912 100 912 86-115 I� <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 84 of 103 ' <br />