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Gasoline
<br /> DTW GWE B T E X MTBE TPH-G Oxygenates/
<br /> Additives
<br /> EPA Method (602)1(8021 B)1 (602)1(8021 B)1 (602)1(8021 B)1 (602)1(80219)! (602)1(8021 B)!
<br /> 8016m 82808
<br /> (8020)/62608 8020 18260E 8020 182608 80201 82608 (8--02-0-)/8-2-6--DB-
<br /> WL
<br /> 2608
<br /> W>=LL la
<br /> TOC ELEV (DATE)
<br />' SV 1 1/16/1997 41 000 17 000 3 300 6,200 1 400 120 NA
<br /> 1/15/2000 1,1D0 34 120 250 1,100 41 ND
<br /> 7/2/2002 210 3 0 31 110 1 000 1 6 NA
<br /> 9/12/2005 2 660 88 2 1 590 1 299 66 6 11 9 <50-<2 0100
<br /> SV-2 4/23/1998 49 000 66 000 3 200 17 000 26 000 270 ND
<br /> 7!212002 53,000 36,000 5.1G0 24,000 ND(4,0001 190 NA
<br /> 9/1212005 25 400 10,300 3 75p i 6 350 2 000 102 <500 <20,000
<br /> ST 7/1811997 71 000 73,000 3 900 19000 35 000 280 NA
<br /> 10/14/1999 9,600 2,100 440 1,400 14,000 25 NA
<br /> 7/2/2002 22,000 8,700 2,000 7,900 29,000 97 NA
<br /> 9112/2005 21,500 4,630 4,790 16,640 4 870 101 <500-<20,000
<br /> SV-4 7/22/1998 71 000 47 000 1 700 9 400 170 000 390 ND
<br /> 7/11/2000 560 110 34 60 46,000 08 NA
<br /> 7/2/2002 73,000 62 000 4,700 19,000 740,000 300 NA
<br /> 10/1512002 93 OOO 96,000 4,600 18,000 730,000 450 NA
<br /> 1/15/2003 82 000 74 000 9 800 24 000 530 000 710 <5000 <130000
<br /> 4/17/2003 97,000 93,000 5,000 23,200 530,000 390 34 000 A
<br /> 7/2512003 80.000 80,000 4,400 20,200 550,000 500 80 000 BA
<br /> 11/912003 86,000 77,000 5,000 21,700 520,000 360 24 000 BA
<br /> 1/30/2004 90,000 79,000 4,700 21,700 350,000 380 130 A
<br /> 517/2004 85,000 111,000 5,200 24,701) 3711000 340 <5110 <20 000
<br /> 7!22/2004 7B.000 70,000 4,800 23,000 410,000 260 <500 <20 000
<br /> 10/14/2004 67,000 64,000 4 100 20,000 310,000 250' <500 <20 000
<br /> 1124/2005 77 000 613000 1 4 900 24 000 320 000 350 <500 <20 000
<br /> 4/13/2005 77 000 58 000 3 900 18 800 320 000 280 <500 <20 000
<br /> 7/28/2005 63,000 53,600 3,970 17,850 317,000 355 <500 <20.000
<br /> 9/12/2005 49,600 39 000 <5 000 c15 000 485,000 235 <5000-x200 000
<br /> 10/13/2005 72,700 64.40 3 510 15,070 295,000 275 <500 <20,000
<br /> 1/2712006 27 200 20,400 2,3()U 8,520 177,000 174 <500-<20,000
<br /> SV-5 10/2211997 55 000 73 000 3 900 is 000 37 000 290 ND
<br /> 7/2/2002 53,000 58,000 5,700 29,000 19 000 260 NA
<br /> 9/12/2005 46.200 47 200 4.900 22,240 4.400 219 <500 <20,000
<br /> SV-6 4/21/1999 65 000 27 000 2 800 13 000 8 600 200 ND
<br /> 7/2/2002 36 000 13,000 2 900 8,000 6,000 110 NA
<br /> 9/12/2005 67,000 3,260 3,130 4.688 1 280 137 <500 <20 000
<br /> SV-7 8!111996 91 000 75 000 3 000 18 000 7 800 360 NA
<br /> 10123/1998 90,000 77 000 3 300 18,000 1,800 360 ND
<br /> 712/2002 73,000 57,000 4 300 22 000 ND(4,000) 250 NA
<br /> 9/12/2005 33,900 41,800 3 330 20 840 <500 205 <500-<20 000
<br /> SV43 112111998 87 000 67 000 3200 17 000 6 400 310 NQ
<br /> 7/2/2002 76,000 45,000 4,100 20,000 3,600 NO(1,000) NA
<br /> 9/12/2005 65.300 33 100 3 310 10.330 2 130 188 <500 <20 000
<br /> 5V,9 4/2/1997 25 000 ND 2 300 1 900 79 00D 53 NA
<br /> 4/12/2000 ND 150 NQ 150 NO 150 ND 300 9 700 ND 25 NA
<br /> 7/212002 35 72 54 11 380 000 27 NA
<br /> 911212005 <50 <50 <50 <150 16 800 04 <50-<2000
<br /> DTW depth to groundwater B T E X benzene toluene ethyl benzene and total xylenes
<br /> GW(_ groundwater elevation TPH-G total petroleum hydrocarbons quantified as gasoline
<br /> TOC ELEV top of well casing elevation MTBE methyl tertiary butyl ether
<br /> MW=Monitoring Well pg1L=micrograms per liter=parts per bilhon(ppb)
<br /> SV=Soil Vapor Extraction Well mglL=milligrams per liter=parts per million(ppm)
<br /> ND=none detected at or above iaboratory reported detection limit
<br /> ND(X)=none detected to a level of X
<br /> NA=not tested for this analyte
<br /> NS=not sampled
<br /> #=monitoring well paved over and not located until after quarterly event was complete DTW not taken
<br /> "=the sample chromatogram does not match the standard gasoline chromatogram
<br /> Notes
<br /> 1) As of the fourth quarter 1999 MTBE was analyzed by EPA Method 602 groundwater monitoring for gasoline oxygenatestadditives other than
<br /> MTBE was discontinued
<br /> 2) From October 1996 through July 1997 MTBE was analyzed by EPA Method 602 but the result was not confirmed by EPA Method 8260
<br /> 3) As of the third quarter 2000 MTBE and BTEX are analyzed by EPA Method 8021 B
<br /> 4) As of the fourth quarter 2002 MTBE and F3TEX are anayzed by EPA Method 8020
<br /> 5) As of the first quarter 2003 groundwater monitoring for other oxygenates/additives was reinstated The selected oxygenates/additives include
<br /> MTBE ethanol(EtOH) tertiary butanol(TBA) dl Isopropyl ether (DIPE),ethyl tert butyl ether(ETBE) tert-amyl methyl ether(TAME)
<br /> 1 2 dlohloroethane(1 2 DCA),and 1 2-dlbromcethane(EDB)and were analyzed by EPA Method 82508
<br /> I ) Elevations surveyed November 26 2001 to NAD 831NAVD 88 referenced to NGS benchmark JS 1384
<br /> 7) As of the fourth quarter 2004 BTEX and other oxygenatesladditives are analyzed by EPA Method 82608(current laboratory analytical method Is shown
<br /> In bold-faced type)
<br /> IP 51600_PnN1707 Canepa\1707F Canepa Pacific\ReportsU]MR\20Mlst gtlAppenchx\C1 1707 Data Jan 2006)ds Page 10 of 10
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