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rt � TABLE A Historic Groundwater Analytical Data Canepa's Park Street(September 1994-July 2005) Other Constituent B T E X MTBE Oxygenates/ TPEl-G Additives EPA Method (602180201 (60218020/ (602180201 (60218020/ (50301LUFT 8021 BI8260B) 8021B/82608) 8021 B/8260B) 8021 B/82608) (8020!82606) ($2606) !8015M) Detection Limits 03 03 03 06 1 0 0 5 005 µg/L ;iWL µg/L µ%/L I Fig/L µglL mg/L MW-7 9/22/1994 NO 54 21 94 NA NA 120 2/14/1995 24 26 65 13 NA NA 0 57 5/4/1995 l5 76 ND 49 NA NA 0 25 8/10/1995 1 l 49 064 27 NA NA 043 4/3/1997 06 2 2 NO NO [4 8] NA 0 19 7/21/1997 04 1 6 NO ND [3 6] NA 0 13 10/23/1997 05 22 NO NO NDv NA 018 1/22/1998 08 3 ND NO NDv NA 021 4/24/1998 059 24 ND ND NDv NA 0 17 7/23/1998 I 1 l2 NO ND NDv NA 010 10/21/1998 04 l9 NO NO NDv NA 010 120/1999 04 1 8 NO NO NDv NA 0 10 423/1999 03 1 4 NO ND NDv NA 008 7/28/1999 ND 12 NO ND NDv NA NO 10/15/1999 NO 08 NO ND NDv NA 006 1/192000 NO 0 8 1 NO ND NDv NA 006 4/192000 NO NO NO ND NDv NA 011 7/132000 ND 09 NO NO NDv NA NO 10/13/2000 ND NO NO NO NDv NA NO 1/2/2001 l2 ND ND ND NDv NA 010 4/132001 NO NO NO ND NDv NA NO 7/18/2001 <0 3 <0 3 <0 3 <0 6 <1 0 v NA <0 05 10/92001 09 <0 5 <0 5 <l 0 <0 5 v NA 009 U8/2002 <0 5 <0 5 <0 5 <l 0 l 4 v NA <005 4192002 <0 5 <0 5 <0 5 <10 13 v NA 006 7/5/2002 <0 5 <0 5 <0 5 <10 2 0 v NA 006 10/1 712 0 0 2 <0 5 <0 5 <0 5 <1 0 3 3 v NA 006 1/13/2003 <0 5 <0 5 <0 5 <1 0 <5 0# NA 006 4/42003 <0 5 <0 5 <0 5 <1 0 <5 04 NA <0 05 7/102003 <0 5 <0 5 <0 5 <1 0 <5 0# NA <0 05 111612003 <0 5 <0 5 <0 5 <l 0 <5 0# NA <0 05 1/282004 <0 5 <0 5 <0 5 <l 0 <5 04 NA <0 05 5/10/2004 <0 5 <0 5 <0 5 7/142004 <0 5 <0 5 <0 5 1 <10 <5 09 NA <0 05 10/122004 <0 5 <0 5 <0 5 <1 0 10 NA <0 05 Ll1/142005 <0 5 <0 5 <0 5 <1 0 20 <0 5<5 0 <0 05 4!1212005 <0 5 <0 5 <0 5 <1 0 15 <05<50 <0 05 7/15/2005 <0 5 1 <0 5 <0 5 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 NO(X)-none detected to a level of X MTBE=methyl tertiary butyl ether s—deleenon limit raised due to interference from non target pg/I,=micrograms per liter=parts per billion(ppb) analytes mg/L—milligrams per liter=parts per million(ppm) NA=not tested for this analyte [x]-EPA Method 602 analysts indicated a concentration of x result was not confirmed by EPA Method 8260B however subsequent analyses by EPA Method 8260 indicates MTBE was present • other oxygenates/additives 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 Dtahloroethene Tnchloroethene and Telrachloroethene were detected at concentrations of 16 5 21 2 and 66 1 pg/L 9c—other oxygenates/addinvcs were analyzed by EPA Method 8260 and were not detected at or above the laboratory reported detection limits with the exception of Di isopropyl ether which was detected above the laboratory reported detection limit ss-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 to the monitoring well at or above the laboratory reported detection limit #=Analyzed by EPA Method 8020 •—Analyzed by EPA Method 82606 All MW Analytical 7-15-05 xls