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16 <br /> Table 5 <br /> Historical Groundwater Sample Oxygenates Analytical Results <br /> The Earthgrams Company <br /> Stockton, California <br />' Monitoring Sampling I Concentration (ug/L) <br /> Well ID Date TBA MTBE DIPS ETBE 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' 05/18/1999 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 /> SP-1 08/18/99 *ND (500) -ND(120) -ND(120) -ND(120) "ND(120) <br /> ' 11/08/99 ND(20) ND(0 5) x100 00 7 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 /> SP-5 08/18/99 ND(20)7 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 /> 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(O 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 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 /> 1 <br /> 1 <br /> E\12138211259971oxygenat As <br />