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Table 6 <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 /> QCTB-1 02/01/10 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 <br /> QCTB-2 02/02/10 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 - <br /> QCTB-3 02/02/10 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <50 <br /> Notes: Contents of this table are a subset of Appendix H. <br /> TPHg =Total Petroleum Hydrocarbons as gasoline SA(1,3) =Well sampled semiannually during first and third quarter <br /> TPHd =Total Petroleum Hydrocarbons as diesel pg/L =micrograms per liter <br /> MTBE =Methyl tertiary butyl ether QCDup =Duplicate sample <br /> MBAS =Methylene Blue Active Substances QCEB =Equipment Blank <br /> NR by MRP =Not Required by the Monitoring and Reporting Program QCTB =Trip Blank <br /> =Not sampled/Not analyzed <br /> a=The method reporting limit has been increased due to an interfering compound. <br /> 7=Samples were analyzed by EPA Method 8260B using bottles that contained headspace bubbles greater than 1/4 inch in diameter. <br /> $=Hydrocarbons are present that are higher boiling than typical diesel fuel. <br /> 9=Grab sample. <br /> "=Discrete peaks in diesel range,atypical for diesel fuel. <br /> 14=Hydrocarbons are present that are lower boiling than typical diesel fuel. <br /> "=Repeat analysis by method 8260B yielded inconsistent results. Highest valid concentrations reported. <br /> 1 Q1 0 STTC gwtables.xlsx Page 17 of 17 <br />