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Table 5 <br />Historical Groundwater Sample Oxygenates Analytical Results <br />The Earthgrains Company <br />Stockton, California <br />Monitoring <br />Well ID <br />Sampling <br />Date <br />Concentration (ug/L) <br />TBA MTBE DIPE ETBE TAME <br />SP -1 <br />vw for 1 Z717a <br />iwk«r) <br />Imuku U) <br />ivuko U) <br />NU(t) U) <br />NU(5 U) <br />CPT -1@85' <br />05/18/1999 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />CPT -2@44' <br />05/18/1999 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />CPT -2@79' <br />05/18/1999 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />CPT -3@44" <br />05/18/1999 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />CPT -3@76' <br />05/18/1999 <br />ND(20) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />SP -1 <br />08/18/99 "ND (500)-ND(120) "ND(120) <br />-ND(120) <br />-ND(120) <br />11/08199 ND(20) ND(0 5) 10000 <br />ND(0 5) <br />ND(0 5) <br />03/13/00 ND(20) ND(0 5) 9000 <br />ND(0 5) <br />ND(0 5) <br />SP -2 <br />11/08/99 ND(5) ND(0 5) ND(0 5) <br />ND(0 5) <br />ND(0 5) <br />03/13/00 ND(20) ND(5 0) ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />SP -5 <br />08/18/99 ND (20) ND(5 0) ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />PZ -1 <br />08/18/99 *ND (1,000) -ND (250) "ND (250) <br />-ND (250) <br />*ND (250) <br />11/08/99 ND(5) ND(0 5) 920 <br />ND(0 5) <br />ND(0 5) <br />03/13/00 ND(20) ND(5 0) 1200 <br />ND(5 0) <br />ND(5 0) <br />PZ -2 <br />08/18/99 -ND (2,000) "ND (500) "ND (500) <br />-ND (500) <br />"ND (500) <br />11/08/99 ND(5) ND(0 5) ND(0 5) <br />ND(0 5) <br />ND(0 5) <br />03/13/00 ND(20) ND(5 0) ND(5 0) <br />ND(5 0) <br />ND(5 0) <br />TBA <br />Tertiary Butyl Alcohol <br />MTBE <br />Methyl Tertiary Butyl Ether <br />DIPE <br />Di -isopropyl Ether <br />ETBE <br />Ethyl Tertiary Butyl Ether <br />TAME <br />Tertiary Amyl 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 />E \121382\1259971oxygenat As <br />