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Gasoline
<br /> DTW GWE B T E X MTBE TPH-G Oxygenates/
<br /> Additives
<br /> EPA Method: (602)/(80218) (602)1(80218) (602)1(8021 B) (602)1(8021 B) (602)1(8260)1 "'LU'($021 B)
<br /> Detection Limits: feet feet 0.3 !L 0.3 !L 0.3 pgIL 0.6 L 1.0 L 0.05 m L 0.5-13.0 /L
<br /> MON,WELL
<br /> TOC ELEV. (DATE)
<br /> MW-12D 10/25/01 34.52 -19.53 170 240 72 430 <10 2.4 NA
<br /> 14.99 1/9/02 33.53 -18.54 35 51 22 109 <1.0 0.76 NA
<br /> 4110/02 32.61 -17.62 16 19 13 48 <5.0 0.53 NA
<br /> 713102 33.54 -18.55 2.7 1.1 2.7 2.1 8.5 0.12 NA
<br /> 10/15/02 36.80 -21.81 1.3 0.5 1.2 <1.0 <5.0 0.55 NA
<br /> 1/15/03 35.78 -20.79 0,5 <0.5 0.6 <1.0 <0.5 <0,05 <0.5-<13
<br /> 4118103 34.80 -19.81 0.8 <0.5 0.8 <1.0 <0.5 0.089 <0.5-<13
<br /> 7125103 36.39 -21.40 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-<20
<br /> 1119/03 37.79 -22.80 <0.5 <0.5 <0,5 <1.0 <0.5L-I <0.05 <0.5-<20
<br /> SV-1 1/16/97 41,000 17,000 1 3,300 6,200 [1,400] 120 NA
<br /> 1/15100 1,100 34 120 250 1,100 4.1 ND
<br /> 7/2102 210 3.0 31 110 1,000 1.6 NA
<br /> SV-2 4123198 49,000 66,000 3,200 17,000 26,000 270 ND
<br /> 712102 53,000 36,000 5,100 24,000 ND 4,000 190 NA
<br /> SV-3 7118!97 71,000 73,000 3,900 19,000 [35,000] 280 NA
<br /> 10!141999,600 2,100 440 1,400 14,000 25 NA
<br /> 712102 22,000 8,700 2,000 7,900 29,000 97 NA
<br /> SV-4 7122/98 71,000 47,000 1,700 9,400 170,000 390 ND
<br /> 7111100 560 110 34 60 46,000 0.8 NA
<br /> 712102 73,000 62,000 4,700 19,000 740,000 300 NA
<br /> 10115/02 93,000 96,000 4,600 18,000 730,000 450 NA
<br /> 1115103 82,000 74,000 9,800 24,000 530,000 710 <5,000-
<br /> <130,000
<br /> 4117103 97,000 93,000 5,000 23,200 530,000 390 34,000 BA
<br /> 7125103 80,000 80,000 4,400 20,200 550,000 500 80,000 BA
<br /> 11!9/03 86,000 77,000 5,000 21,700 520,000 360 24,000 BA
<br /> SV-6 10/22/97 55,000 73,000 3,900 19,000 37,000 290 ND
<br /> 712102 53,000 58,000 5,700 29,000 19,000 260I NA
<br /> SV-6 4/21/99 65,000 27,000 2,800 13,000 8,600 200 ND
<br /> 712102 36,000 13,000 2,900 8,000 6,000 110 NA
<br /> SV-7 8/1/9fi 91,000 75,000 3,000 18,000 7,800 360 NA
<br /> 10/23/98 90,000 77,000 3,300 18,000 1,800 360 ND
<br /> 712/02 73,000 57,000 4,300 22,000 ND 4,000 250 NA
<br /> SV-8 1 1/21/98 87,000 67,000 3,200 17,000 6,400 310 ND
<br /> 712102 76,000 45,000 4,100 20,000 3,600 ND 1,000 NA
<br /> SV-9 412197 25,000 ND 2,300 1,900 79,000 53 NA
<br /> 4112!00 ND 150 ND 150 ND 150 ND 300 9,700 NO 25 NA
<br /> 712!02 35 7.2 5.4 11 380,000 27 NA
<br /> DTW:depth to groundwater
<br /> GWE:groundwater elevation
<br /> TOG ELEV.:top of well casing elevation
<br /> B,T,E,X: benzene,toluene,ethyl benzene,and total xylenes
<br /> TPH-G:total petroleum hydrocarbons,quantified as gasoline
<br /> MTBE:methyl tertiary butyl ether
<br /> ND=none detected at or above laboratory 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 /> #=monitor well paved over and not located until after quarterly event was complete,DTW not taken
<br /> Notes:
<br /> 1)As of the fourth quarter 1999, MTBE was analyzed by EPA Method 602; groundwater monitoring for gasoline oxygenatesladditives 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 80216,
<br /> 4)As of the fourth quarter 2002,MTBE and BTEX are analyzed by EPA Method 8020,
<br /> 5)As of the first quarter 2003,groundwater monitoring for other oxygenatesladditives was reinstated.The selected oxygenatesladditives include
<br /> methyl tort butyl ether(MTBE),ethanol(EtOH),tertiary-butanol(TBA),di-isopropyl ether,(DIPS),ethyl-tart butyl ether(ETRE),tert-amyl methyl
<br /> ether(TAME), 1,2-dichloroethane(1,2-OCA),and 1,2-dibromoethane(EDB)and were analyzed by EPA Method 82608.
<br /> 6)Elevations surveyed November 26,2001 to NAD 83/NAVD 88 referenced to NGS benchmark JS1384.
<br /> 1707 Data 4th-03.xls(Table A) Page 6 of 13
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