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WELL CONCENTRATIONS
<br /> She![-branded Service Station
<br /> 6131 Pacific Avenue
<br /> Stockton, CA
<br /> Yic #204-1525!,0104 1
<br /> MTBE MTBE Depth to Depth to GW SPH DO
<br /> [W(
<br /> :II ID Date TPPH B T 3 E X 8020 8260 TOC Water
<br /> SPH Elevation Thickness Reading
<br /> (ug/L) (ug/L) (ug/L) ('ug/L} (ugIQ (ug/L) (ug1L) (MSL) (ft} (ft ) !(MSL) (ft ) (ppm)
<br /> I II III {
<br /> VE W-2 02/26/1997 NA NA NA NA II 11 NA NA NA NA Dry NA NA NA NA
<br /> VE W-2 06/10/1997 NA NA NA NA IC J1 NA NA NA NA D�y NA ( NA NA NA
<br /> VE-W-2 08/22/1997 NA NA NA NA II II NA NA NA NA D NA NA NA NA
<br /> VE-W-2 10/09/1997 NA NA NA NA II II NA NA NA NA D I NA I NA NA NA
<br /> VEW-2 02/1011998 120,000 4,500 20,000 i,8001 26,000 <1,000 ND NA 3801 NA NA NA NA
<br /> VEW-2 05/20/1998 120,000 4,200 20,000 1,9001 24,000 <2,500 ND NA 3481 NA I NA NA NA
<br /> VEW-2 07/29/1998 10,000 4,600 21,000 1,800 26,000 <1,000 ND NA 3510 I NA I NA NA NA
<br /> VEW-2 1112311998 120,000 3,600 17,000 1,6001 24,000 <1,000 <200 NA 3441 NA I NA NA NA
<br /> VE-W-2 02/24/1999 75,000 2,400 14,000 1,4061 14,000 310 <100 NA 3247 NA NA NA NA
<br /> VEW-2 05/1311999 117,000 3,130 14,100 1,506{ 22,000 <1,250 <125 NA 3139 I NA NA NA NA
<br /> VEW-2 08/20/1999 110,000 3,240 15,600 1,7001 ,19,100 <2,500 636 NA 3448 NA I NA NA NA
<br /> VE=W-2 11/02/1999 115,000 4,130 25,200 <25011 23,200 <1,250 NA NA 3423 j NA I NA NA NA
<br /> VEW-2 02/03/2000 88,900 3,090 10,300 1,8501 20,400 <500 NA NA 3255 , NA NA NA NA
<br /> Fi
<br /> _W-2 05/15/2000 112,000 3,050 13,000 2,2001 26,500 <500 NA NA 3195 i NA I NA NA NA
<br /> W-2 08/16/2000 73,400 1 3,200 9,770 1,9001 17,900 <2,000 228 NA 3512 NA I NA NA NA
<br /> Abbreviations
<br /> TPPH=total petroleum hydrocarbons as gasoline by modified EPA Method 8015
<br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8615
<br /> BTEX=benzene,toluene,ethylbenzene, xylenes by EPA Method 8020
<br /> MTBE=methyl-ternary-butyl ether by EPA Method 8020
<br /> TOC=Top of Casing Elevation
<br /> SPH=Separate-Phase Hydrocarbons
<br /> GW=Groundwater
<br /> DO= Dissolved Oxygen
<br /> ug/L =parts per billion
<br /> II
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