ARCHIVED REPORTS_MONITORING WELL INSTALLATION REPORT - SITE ASSESSMENT WORK PLAN

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1 • Historical Background: River City Petroleum and Connell Motor Lift Truck ' Page 7 of 13 samples from CPT P32 as follows: ' 0 TPH-ss and TPH- were detected at concentrations as high as 2 300 milligram per kilogram g g gr' p gi' (mg/kg) in soil sample P32-60, TPH-d was detected in the same sample at a concentration ' of 1,300 mg/kg. • TPH-g and TPH-ss were both detected in soil sample P32-70 at a concentration of 1,800 ' mg/kg,TPH-d was detected, in the same sample, at a concentration of 2,000 mg/kg. TPH-g and TPH-ss were detected in soil sample P32-78 at concentrations of 41 and 72 mg/kg, respectively. TPH-d was not detected in the same sample. iToluene,ethylbenzene and xylene were detected,in the above samples,at concentrations as high as 2.6 mg/kg.The volatile organic compound methanol was detected in one soil sample, ' P32-60, at a concentration of 310,000 micrograms per kilogram(gg/kg). • Oxygenated fuel additives were not detected in the soil samples analyzed. A total of five "grab" ground water samples were collected from CPT P30 through P33 and submitted for laboratory analysis for the above mentioned constituents. ' TPH-g and TPH-ss were detected in the grab water sample collected from boring P32 at 60 feet bsg, at concentrations of 120,000 micrograms per liter(µg/1). TPH-g and TPH-ss were 1 detected in water samples collected from boring P32 at 100 feet bsg,at concentrations of 440 and 140 µg/1, respectively. ' • TPH-d was detected in water samples collected from boring P32 at 60 and 100 feet bsg, at concentrations of 230 and 330 gg/l, respectively. • TPH-g and TPH-ss were detected in water samples collected from boring P33 at 80 feet bsg, ' at concentrations of 680 and 210 µg/1, respectively. TPH-d was detected in the same water sample collected from boring P33 at a concentration of 230 µg/1. • BTEX compounds were detected in the ground water samples at concentrations as high as 760 gg/l (P32-60, xylene). Benzene was detected in the ground water sample from P32-60 at a concentration of 96 µg/1 . • 1,2-DCE was detected at a concentration of 1.4 gg/1 in the water sample collected from P30 at a depth of 100 feet bsg and 1,2-DCA was detected at a concentration of 25 µg/1 in the grab ' ground water sample collected from P33 at approximately 80 feet bsg. • No other petroleum hydrocarbon constituents or fuel oxygenated compounds were detected ' by the laboratory analyses. Advanced GcoEnvironmental,Inc.