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' Table A-Historical Laboratory Analytical Data (continued) • GASOLINE OXYGENATES/ADDITIVES B T E X TPH-G TPH-D MTBE Other Gasoline Oxygenates/Additives Detection Limits: 0.3 0.3 0.3 0.6 0.05 0.05 1.0 See Lab Reports ' µg/1 µg/l Ag/I pg/I mg/l mg/I µg/l µg/l Analytical Method: 8260B 8260B 8260B 8260B 50301 3510/ 8260B 8260B 8015M 8015M ' Sample LD./Date MW8-1/5/00 53 31 34 104 1 0.9 ND 4.1 NA MW&N27/00 33 5.9 47 46 0.9 ND 9.0 NA MW8-6123/00 1,600 42 710 1,600 17 ND 19 NA MW8-918/00 2,900 70 1,800 4,200 33 ND 36 NA MW8-12/29/00 310 ND 140 I2 2.8 0.34 ND ND MW8-3/5/01 75 ND 24 ND 1.0 ND ND ND ' MW8-6/4101 1,300 25 220 920 10 ND ND ND MW8-9/10/01 2,000 33 1,800 1,800 21 ND 34 ND MW8-12/17/01 572 ND 888 38 3.4 ND ND ND MW8-2/27102 140* 0.8 160* 70 0.55 ND <0.5 ND . MW8-6/26/02 1,100 24 650 1,617 9.8 ND 32 ND-6 MW8-9/30/02 480 2.3 51 27 5.4 NA 9.2 ND+f DW-2/27/02 <0.5 <0.5 <0.5 <1.0 ND ND <0.5 ND DW-6/26/02 <0.5 <0.5 <0.5 <1.0 ND ND <0.5 ND DW-9/30102 <0.5 <0.5 <0.5 <1.0 1 <0,05 NA <0.5 ND Units: Analytical: mg/L=milligrams per liter=parts per million(ppm) B,T,E,X=benzene,toluene,ethyl benzene,total xylenes µg/L=micrograms per liter=parts per billion(ppb) TPH-G=total petroleum hydrocarbons quantified as gasoline Gasoline oxygenates/additives= methyl tertiary butyl ether(MTBE),ethanol, tertiary butanol,di-isopropyl ether(D1P$),ethyl tertiary butyl ether(ETRE), tertiary amyl methyl ether(TAME), 1,2-dichloroethane(1,2-DCA) ND=not detected at or above the laboratory reported detection limits NA=not analyzed *=estimated concentration ♦ = all other oxygenates/additives were not detected at or above laboratory reporting limits ' 4, = all other oxygenates/additives were not detected at or above raised laboratory reported detection limits;see laboratory reports for actual detection limits P:13471 Eckert Cnld Storage13471 A Eckert Cnld SinragelQuarterly Monitoring Reports12002-September\11istor.cal Data.doc - 1 ' Page 7 of 7