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Ripona Market • <br /> Subsurface Soil & Groundvi ater Investigation III <br /> Page: 3 <br /> as 2-inch groundwater monitoring wells The wells were installed in vicinity of the <br /> former the fuel-island former underground tanks to define direction of groundwater <br /> flow and the lateral extent of the soil and groundwater impact <br /> Three soil samples were collected from each boring for laboratory analysis which a <br /> sample from the capillary zone and apparently contaminated areas above and/or below <br /> groundwater Petroleum contamination was not detected in any of the soil samples <br /> However, 1100 µg/Kg MTBE was detected in the 25 foot soil sample in boring MW-2 <br /> Table of Laborato Soil Sample Results (July 27, 2000) <br /> Sample I D Gasoline Benzene I Toluene E-Benzene I Xylenes MTBE <br /> MW-1-15 ND ND ND ND ND ND <br /> MW-1-20' ND ND ND ND ND ND <br /> MW-1-25 ND ND ND ND ND ND <br /> MW-2-15 ND ND ND ND ND ND <br /> MW-2-20' ND ND ND ND ND ND <br /> MW-2-25' ND ND ND ND ND *1700 <br /> MW-3-15 ND ND ND ND ND ND <br /> MW-3-25' ND ND ND ND ND ND <br /> MW-3-30 ND ND ND ND ND ND <br /> ND=Non Detect NA=Not Analvzed, Gasoline reported in Mg/Kg BTEX-MTBE mµg/Kg <br /> *MTBE Confirmed present b1 Method 8260 **MTBE Confirmed not present by Method 8260 <br /> Laboratory analyses of water samples collected from the monitoring wells detected up <br /> to 680 gg/l gasoline range petroleum hydrocarbons, 3 3 µg/1 benzene, 19 Pg/1 toluene, <br /> 15 gg/l ethyl benzene, 12 µg/1 total xylenes, and several fuel oxygenates (6300 gg/l <br /> MTBE, 1000 gg/l t-butyl ether, and 2 3 gg/l tame) <br /> Table of Laboratory Water Sample Results (Jul 31, 2000) <br /> Sample I D Gasoline Benzene I Toluene E-Benzene Xylenes Oxygenates <br /> MW-2 068 33 19 15 71 6300 mtbe, 1000 t-Eti , 2 3 tame <br /> MW-3 Oil ND 20 2 5 12 3 2 mtbe <br /> ND=Non Detect NA=Not Analyzed, Gasohne reported in Mg/L, BTEX and Oxvgenates inµg/L <br /> The well head elevations were surveyed to calculate groundwater elevations and the <br /> direction and magnitude of groundwater flow <br /> Groundwater Elevations <br /> Well Collar Elevation DTW GW Elevation <br /> MW-1 6958 21 12 4846 <br /> MW-2 7001 21 5 4851 <br /> MW-3 70 2176 4824 <br /> Groundwater flow in July 2000 wa north 80 degrees eas with a gradient of 0 009 ft/ft <br />