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TABLE A(continued) Constituent B T E X MTBE TPH-G EPA Method (602/8020/ (602/8020/ (602180201 (60218020/ (8020/826013) (5030/LUFT/ 8021B/8260B) 8021B1826013) 8021BI8260B) 802 113/826013) 8015m) Detection Ltrlllt8 03 03 03 06 1 0 005 l<g/L gg/L µB/L µ8/L 413n- tng/L M W 7 9/22/1994 ND 54 2 1 94 NA 12 2/14!1995 24 26 65 13 NA 057 5/4/1995 15 76 ND 49 NA 025 8/10/1995 11 49 064 27 NA 043 4/3/1997 06 22 ND ND (4 8] 019 7/21/1997 04 1 6 ND ND [3 6] 013 10/2311997 05 22 ND ND NDv 0 18 1/22/1998 08 3 ND ND NDv 021 4/24!1998 059 24 ND ND NDv 0 17 7/23/1998 1 1 1 2 ND ND NDv 0 E 10121/1996 04 19 ND ND NDv 01 1120/1999 04 I B ND ND NDv 0I 412311999 03 1 4 ND ND NDv 0 06 712811999 ND 12 ND ND NDv ND 10/15/1999 ND OB ND ND NDv 006 1/19/2000 ND 08 ND ND NDv 006 411912000 ND NO ND ND NDv 011 711312000 ND 08 ND ND NDv ND 10/13/2000 ND ND ND ND NDv ND lIV2001 1 2 ND ND ND NDv 00976 4/13/2001 ND ND ND ND NDv ND 7/E6/2001 <03 <03 <03 <06 <1O• <005 • 10/9@001 09 <0 5 <0 5 <1 0 <95V 0 091 1/8/2002 <05 <05 <05 <10 14v <005 4/9/2002 <0 5 <0 5 <0 5 <1 0 1 5 v 006 7/5/2002 <0 5 <0 5 <0 5 <1 0 2 0• 0 056 10/17/2002 <0 5 <0 5 <0 5 <1 0 3 3v 0 055 1/1312003 <0 5 <0 5 <0 5 <1 0 <5 Or# 006 4/4/2003 <0 5 <0 5 <0 5 <1 0 <5 00 <0 05 7/10/2003 <0 5 <0 5 <0 5 <1 0 <5 00 <0 05 11/6/2003 <0 5 <0 5 <0 5 <1 0 <5 0# <0 05 tn8/2004 <0 5 <0 5 <0 5 <1 0 <5 04 <0 05 5/10/2004 <0 5 <0 5 <0 5 <1 0 <5 0#I c0 OS 7/14/2004 <0 5 <0 5 <05 <1 0 <5 0## <0 05 10/12x2004.. 105 B T E X—benzene toluene ethyl benzene and total xylenes ND=none detected at or above laboratory detection limit TPH G—total petroleum hydrocarbons quantified as gasoline ND(X).none detected to a level of X MTBE—methyl tertiary butyl ether •—detection limit raised due to interference from non target analytes NA—not tested for this analyte µg/L-micrograms per liter=parts per billion(ppb) mg/L—milligrams per liter=parts per million(ppm) [x]-EPA Method 602 analysts indicated a concentration of x result was not confirmed by EPA Method 82606 however subsequent analyses by EPA Method 8260 indicates MTBE was present V—other oxygenatesladdtttves were analyzed by EPA Method 8260 and were not detected at or above the laboratory reported detection limits --Sample chromatogram does not resemble typical gasoline standard chromatogram The sample was further analyzed and cis 1 2 Dichloroethene Trichloroethene and Tetrachloroethene were detected at concentrations of 16 5 21 2 and 66 1 pg/L. &=other oxygenatesladdttives were analyzed by EPA Method 6260 and were not detected at or above the laboratory reported detection Limits with the exception of Di tsopropyl ether which was detected above the laboratory reported detection lima ••=EPA Method 602 indicated that MTBE was present at 240µg/L However EPA Method 8260 indicated in the previous monitoring event that • MTBE was not present in the monitoring well at or above the laboratory reported detection limit N=Analyzed by EPA Method 8020 •-Analyzed by EPA Method 8260B •a=As of the October l2 2004 monitoring event analyses for BT£X and MTBE will be conducted by EPA Method 62606