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Table 5 <br /> Historical Groundwater Sample Oxygenates Analytical Results <br /> The Earthgrains Company <br /> Stockton, California <br /> Monitoring Sampling Concentration (uglL) <br /> Well ID Date TBA MTBE DIPS ETRE TAME <br /> CPT-1 @45' 05/18/1999 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> CPT-1@85' 05/18/1999 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> CPT-2@44' 05118/1999 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> CPT-2@79' 05/18/1999 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> CPT-3@44' 05/18/1999 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> CPT-3@76' 05/18/1999 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> SPA 08/18/99 `ND(500) *ND(120) -ND(120) "ND(120) -ND(120) <br /> 11/08/99 ND(20) ND(0 5) 10000 ND(0 5) ND(0 5) <br /> 03/13/00 ND(20) ND(0 5) 9000 ND(0 5) ND(0 5) <br /> 07/02/00 ND(20) ND(0 5) 5600 ND(0 5) ND(0 5) <br /> SP-2 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 /> SP-5 08/18/99 ND(20) ND(5 0) ND(5 0) ND(5 0) ND(5 0) <br /> PZ-1 08/18/99 -ND(1,000) *ND (250) *ND(250) *ND (250) *ND(250) <br /> 11/08/99 ND(5) ND(0 5) 920 ND(0 5) ND(0 5) <br /> 03/13/00 ND(20) ND(5 0) 1200 ND(5 0) ND(5 0) <br /> 07/02/00 ND(20) ND(5 0) 1700 ND(5 0) ND(5 0) <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 /> 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 Methyl 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 /> ' env162400132/121382eg/stockton/oxygenat <br />