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Table 5 <br />Historical Groundwater Sample Oxygenates Analytical Results <br />The Earthgrams Company <br />Stockton, California <br />Monitoring <br />Well ID <br />Sampling <br />I Date <br />Concentration (ug/L) <br />I TBA MTBE DIPE ETBE TAME <br />FL -Z Uta/1SI'VV <br />"NL) (L,000) "NU (5UU) 'NU (ODU) "NU (DUU) <br />—NU (ODU) <br />11/08/99 <br />ND(5) <br />ND(0 5) <br />ND(0 5) <br />ND(0 5) <br />ND(0 5) <br />03/13/00 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />07/02/00 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />10/18/00 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />01/18/01 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />TBA <br />Ternary Butyl Alcohol <br />MTBE <br />Methyl Tertiary Butyl Ether <br />DIPE <br />Di -isopropyl Ether <br />ETBE <br />Ethyl Ternary Butyl Ether <br />TAME <br />Tertiary Amyt Methyl Ether <br />ug/L <br />Micrograms per liter <br />ND <br />Not detected at or above laboratory detection limit <br />shown in parentheses (using USEPA Method 8260) <br />" <br />Oxygenate detection limits elevated due to gasoline interference <br />env/62400132/121382eg/stoclktonloxygenat <br />