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Site Background Information: Fast & Easy Mart <br /> . Page 2 of 3 <br /> 1 <br /> UNDERGROUND STORAGE TANK REMOVAL <br /> 1 On 22 September 1998,two USTs, the dispenser island, and associated piping were removed from <br /> the site by SSSE. Four soil samples were collected from beneath the USTs, one soil sample was <br /> 1 collected from beneath the dispenser area, and three laboratory-composited soil samples were <br /> collected from the excavated soil and submitted for laboratory analysis. <br /> 1 MTBE and tertiary-butyl alcohol (TBA) were detected in I samples collected from beneath the <br /> USTs and dispenser island at concentrations as high as 3 milligrams per kilogram(mg/kg). TPH-g <br /> was detected at concentrations as high as 1,400 mg/kg and benzene, toluene, ethylbenzene, and <br /> 1 xylenes (BTEX) were detected at concentrations as high as 190 mg/kg. i TZ r/, <br /> xyIa v, <br /> Approximately 200 tons of soil were excavated during the removal of the USTs. After the removal <br /> 1 was completed, the soil was placed back into the excavation because of the presence of strong <br /> hydrocarbon odor and the proximity of the excavation to a school. Two laboratory-composited <br /> samples were collected from the stockpiled soil prior to replacement into the excavation. TPH-g, <br /> 1 BTEX, MTBE, and TBA were all detected in the composite samples. <br /> 1 • SOIL EXCAVATION PROCEDURES <br /> 1 On 10 November 1998,approximately 250 yards ofhydrocarbon-impacted soil were excavated from <br /> the location of the former UST system using a backhoe with an approximate 15-foot reach <br /> capability. The excavated soil was stockpiled on the eastern edge of the site and field-screened for <br /> ' the presence of volatile organic compounds using an organic vapor meter (OVM). Subsequently, <br /> approximately 150 yards of soil was loaded and transported to Forward Inc.Landfill under manifest <br /> for proper disposal on 10 November 1999. An additional 100 yards of impacted soil were <br /> ' transported to Forward Inc. Landfill for disposal on 14 December 1999. <br /> A total of nine soil samples were collected from the floor and sidewalls of the over-excavation for <br /> laboratory analysis. TPH-g was detected at concentrations as high as 80 mg/kg in the sample from <br /> the east end of the north wall of the excavation. TPH-g was not detected in soil samples collected <br /> from the south, northwest, and east walls of the over-excavation. Additionally, TPH-g was not <br /> detected in the samples collected from the south end of the west wall or the floor of the excavation. <br /> rpli 4tJRS -PPo `in so i s : @ 80 m9 I 1 Nae th rJ�`l EGl h .,sol �t- <br /> 9 3,� ..� Qi! �o� �►�. a ,off. <br /> BTEX compounds were detected at concentrations as hig/as .0 mg/kg;benzene was only detectedin the northwest wall sample.MTBE and TBA were detet concentrations as high as 1.3 mg/kg <br /> ,,and 8.9 mg/kg, respectively; the highest concentrationTBE were detected irI the northern <br /> b" ortion of the over excavation, especially in the northw wall sample. <br /> � PREVIOUS SITE ASSESSMENT <br /> 1 <br /> Advanced GeoEnvironmental,Inc. <br /> 1' <br />