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Sequoia , Industrial Read <br /> San Carlos[osCA 94070-4111 <br /> Analytical FAX(6 0) 32-9612 <br /> koffle-r-Ryan/Geostratepes(l) Project Unocal(1) Sampled 9/16/99 <br /> 6747 Sierra Court,Suite D Project Number Unocal SS#5098 Received 9/16/99 <br /> Dublin,CA 94568 Pro ect Manager Deanna Harding Reported 9/30/99 <br /> E' �' Y - "` - `Volatile 4rgaink Compounds byI Method 8010B/Quslify Control �' m k, - 1711 "� <br /> rMt Sequoia Analytical--San Carlos - <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Lumts % Limit % Notes* <br /> Blank(continued) 9090065-BLK3 <br /> trans-l,2-Dichloroethene 9/16/99 ND ug/I 0.500 <br /> 1,2-Dichloropropane ND ^ 0,500 <br /> cis-1,3-Dichloropropene ND 0,500 <br /> trans-l,3-Dichloropropene ND " 0.500 <br /> Methylene chlonde " ND ^ 500 <br /> 1,1,1,2-Tetrachloroethane ND ^ 0.500 <br /> Tetrachloroethene ^ ND 0.500 <br /> 1,1,1-Tnchloroethane ND 0 500 <br /> 1,1,2-Tnchloroethane ND 0-500 <br /> Trtchloroethene ND 0.500 <br /> Tnchlorofluoromethane ND 0 500 <br /> Vinyl chloride ND 100 <br /> Surrogate 1-Chloro-2 fuorobenzene 100 114 " 700-130 114 <br /> Blank 9090065-BLK4 <br /> Wmodichloromethane 9/17/99 ND ug/l 0 500 <br /> OOM'oform ND 0 500 <br /> Bromomethane ND 100 <br /> Carbon tetrachloride ND 0 500 <br /> Chlorobenzene ND 0 500 <br /> Chloroethane ND 100 <br /> 2-Chloroethylvinyl ether ND 100 <br /> Chloroform ND 0 500 <br /> Chloromethane ND 100 <br /> Dibromochloromethane ND 0 500 <br /> 1,3-Dichlorobenzene ND 0 500 <br /> 1,4-Dichlorobenzene „ ND 0 500 <br /> 1,2-Dichlorobenzene ND 0 500 <br /> I,1-Dichloroethane ND 0500 <br /> 1,2-Diehloroethane ND 0 500 <br /> IJ-Dichloroethene ND 0500 <br /> cis-1,2-Dichloroethene ND 0 500 <br /> trans-l,2-Dichloroethene ND 0 500 <br /> 1,2-Dichloropropane ND 0 500 <br /> cis-1,3-Dichloropropene ND 0 500 <br /> trans-l,3-Dichloropropene ND 0 500 <br /> Methylene chloride ND 500 <br /> 1,1,1,2-Tetrachloroethane ND 0 500 <br /> Tetrachloroethene ND 0 500 <br /> 1,1,1-Tnchloroethane ND 0 500 <br /> 1,1,2-Tnchloroethane ND 0 500 <br /> uoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 28 of 30 <br />