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Table 5 <br /> Historical Groundwater Sample Oxygenates Analytical Results <br /> The Earthgrains Company <br /> 1 Stockton,California <br /> Monitoring Sampling I Concentration(ug/L) <br /> Well ID Date TBA MTBE DIPE ETBE TAME <br /> PZ-2 08/18/99 *ND(2,000) `ND(500) `ND (500) 'ND (500) *ND(500) <br /> 11/08/99 ND(5) ND(0 5) ND(0 5) ND(0 5) ND(0 5) <br /> 03/13/00 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> 07/02/00 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> 10/18/00 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> 01/18/01 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> 04/20/01 ND(20) ND(5 0) 4ND(5 0) ND(5 0) ND(5 0) <br /> 07/19/01 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> 10/23/01 ND(2 0) ND(0 5) ND(0 5) ND(0 5) ND(0 5) <br /> TBA Tertiary Butyl Alcohol <br /> MTBE Methyl Tertiary Butyl Ether <br /> DIPE Di-isopropyl Ether <br /> ETBE Ethyl Tertiary Butyl Ether <br /> TAME Tertiary Amyl Methyll Ether <br /> ug/L Micrograms per liter <br /> ND Not detected at or above laboratory detection limit <br /> shown in parentheses(using USEPA Method 8260) <br /> Oxygenate detection limits elevated due to gasoline interference <br /> env/624001321121382eg/stockton/oxygenat <br />