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Table 2 <br /> Recent Groundwater Oxygenate and Fuel Additive Analytical Data <br /> Stockton Terminals Technical Committee <br /> Port of Stockton <br /> Stockton, California <br /> Sample Sample MTBE DIPE ETBE TAME TBA Methanol Ethanol 1,2-DCA EDB <br /> Identification Date (Ng/L) (ug/L) (Ng/L) (ug/L) (ug/L) (pg/L) (Ng/L) (Ng/L) (Ng/L) Comments <br /> QCTB-1 11/05/08 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 - - <br /> QCTB-2 11/03/08 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 - - <br /> QCTB-3 11/06/08 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 - - <br /> QCTB-1 02/02/09 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 - - <br /> QCTB-2 02/03/09 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 - - <br /> QCTB-3 02/02/09 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 - - <br /> Notes: <br /> pg/L =Micrograms per liter. <br /> TBA =Tertiary butyl alcohol,analyzed by EPA Method 82608. <br /> MTBE =Methyl tertiary butyl ether,analyzed by EPA Method 82608. <br /> DIPE =Di-isopropyl ether,analyzed by EPA Method 8260B. <br /> ETBE =Ethyl tertiary butyl ether,analyzed by EPA Method 82608. <br /> TAME =Tertiary amyl methyl ether,analyzed by EPA Method 8260B. <br /> 1,2-DCA =1,2-Dichloroethane,analyzed by EPA Method 8260B. <br /> EDB =1,2-Dibromoethane,analyzed by EPA Method 8260B. <br /> Ethanol =Analyzed by EPA Method 8260B. <br /> Methanol =Analyzed by EPA Method 8015B or 82608. <br /> - =Not sampled/Not analyzed <br /> NR =Not required <br /> SA(1,3) =Sampled semiannually during first and third quarters <br /> A(1) =Sampled annually during first quarter <br /> A(3) =Sampled annually during third quarter <br /> '=The method reporting limit has been increased due to the presence of an interfering compound. <br /> 2=Samples were analyzed by EPA Method 8260B using bottles that contained headspace bubbles greater than 1/4 inch in diameter. <br /> 3=Sample foamed during the purging procedure. Results for this sample should be used with caution. <br /> 1 Q09 STTC gwtables.xls Page 14 of 14 <br />