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CACLARIA <br /> Table 1. Groundwater Analytical Data - Additional Constituents - Shell-branded Service Station, Incident#98995643, 1071 North Main Street, <br /> Manteca, California <br /> MTBE MTBE <br /> Sample Date 1,2-DCA EDB by 8020 by 8260 Ethanol TBA t-Butanol DIPE ETBE TAME Methanol D.O. <br /> ID Sampled i (Concentrations in b) (ppm) <br /> 07/22/99 <0.500 <0.500 4.49 3.43 <500 <100 --- <2.00 <2.00 <2.00 <1,000 1.3 <br /> 10/13/99 <0.500 <0.500 <2.50 <2.00 <500 <100 --- <2.00 <2.00 <2.00 <1,000 4.5 <br /> 01/06/00 <0.500 <0.500 <2.50 <2.00 <1,000 <200 --- <2.00 <2.00 <2.00 <1,000 2.9 <br /> 04/11/00 <1.00 <1.00 4.68 1.76 <200 <20.0 --- <1.00 <1.00 <1.00 <1,000 2.6 <br /> 07/27/00 <0.500 <1.00 <2.50 <1.00 <400 <20.0 --- <1.00 <1.00 <1.00 <1,000 4.0 <br /> 10/10/00 <10.0 <10.0 472 35.0 <2,000 <400 --- <20.0 <20.0 <20.0 <1,000 2.2 <br /> Abbreviations: Notes: <br /> I <br /> 1,2-DCA=1,2-dichloroethane by EPA Method 8010 a=Sample re-analyzed past hold time;results should be considered estimates <br /> EDB=Ethylene dibromide(1,2-dibromoethane)by EPA Method 8010 <n=Below detection limit of n ppb <br /> MTBE=Methyl tert-butyl ether by EPA Methods 8020 and 8260 ---=Not analyzed <br /> TBA=Tert-butyl alcohol by EPA Method 8260 - <br /> DIPE=Di-isopropyl ether by EPA Method 8260 <br /> ETBE= Ethyl tert-butyl ether by EPA Method 8260 Methanol by modified EPA Method 8015 <br /> TAME=Tert-amyl methyl ether by EPA Method 8260 Ethanol and t-Butanol by EPA Method 8260 <br /> D.O.=Dissolved oxygen,measured post-purge <br /> ppb=Parts per billion <br /> ppm=Parts per million <br /> dup=Duplicate sample <br /> I <br /> g:V s tl071'gm5gmi2,xls 2 of 2 <br />