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Table 1 <br /> Recent Groundwater Analytical Data <br /> Stockton Terminals Technical Committee <br /> Port of Stockton <br /> Stockton, California <br /> Ethyl- Total MTBE TPH as TPH as <br /> Sample Sampling Benzene Toluene Benzene Xylenes 8260 Gasoline Diesel MBAS Comments <br /> Identification Date (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) <br /> QCEB-1 02/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 <br /> QCEB-2 02/03/09 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCEB-3 02/04/09 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-1 05/05/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 - - <br /> QCTB-2 05/05/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 - - <br /> QCTB-1 08/05/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-2 08/05/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-3 08/05/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-1 11/05/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 <br /> QCTB-2 11/03/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-3 11/06/08 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-1 02/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-2 02/03/09 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-3 02/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> Notes: <br /> pg/L =micrograms per liter SPH =Separate Phase Hydrocarbons <br /> TPI-Ig =Total Petroleum Hydrocarbons as gasoline SA(1,3) =Well sampled semiannually during first and third quarter <br /> TPHd =Total Petroleum Hydrocarbons as diesel QCDup =Duplicate sample <br /> MTBE =Methyl tertiary butyl ether QCEB =Equipment Blank <br /> MBAS =Methylene Blue Active Substances QCTB =Trip Blank <br /> =Not sampled/Not analyzed <br /> '=Grab sample. <br /> `=Discrete peaks in diesel range,atypical for diesel fuel. <br /> =TPHd does not exhibit a typical diesel chromatographic pattern. <br /> '=The method reporting limit has been increased due to an interfering compound. <br /> '=Hydrocarbons are lower boiling than typical diesel fuel. <br /> �=Sample foamed during the purging procedure.EPA 8260B results for this sample should be used with caution. <br /> Samples were analyzed by EPA Method 82608 using bottles that contained headspace bubbles greater than 1/4 inch in diameter. <br /> °=Hydrocarbons are higher boiling than typical diesel fuel. <br /> "=Reported value primarily attributed to presence of compounds observed as a result of the depredation of natural plant materials. <br /> 0=Primarily compounds not found in typical gasoline. <br /> "=Primarily due to 2-Ethyl-l-Hexanol <br /> 1009 STTC gwtables.xls Page 15 of 15 <br />