SITE INFORMATION AND CORRESPONDENCE

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l /i Page 2 423 Madison Street There is no data from beneath the building, however data from borings 6, 7 and 8 may be extrapolated to this area. Analysis of the groundwater sample from GP-5 for TPH-g and STEX was also non detectable. Analytical results of soil samples from GP-5 for semi volatile organic compounds indicate the presence of phenol from 15 feet below ground surface (bgs) to the capillary fringe at 25 feet bgs. Groundwater analysis for phenol resulted in non-detection. PHS/EHD recommends the removal or remediation of the contaminated soil returned to the tank excavation after the tank removal which was to a depth of at least 15 feet. PHS/EHD also recommends the mass volume of semi volatile organic compounds (phenol) present from 15 foot to the capillary fringe in GP-5 be modelled to determine the impact to groundwater. 4) Tank 2 Waste Oil Storage The extent of petroleum hydrocarbon contamination in soil from this tank appears to have been defined. There are low levels of phenol at 20 and 25 feet bgs and a detection of .7 ppb xylene in groundwater. PHSIEHD recommends the removal or remediation of the contaminated soil returned to the tank excavation after the tank removal. PHSIEHD also recommends the remaining mass volume of phenol to be modeled to determine the impact to groundwater. The xylene contamination in this area may be considered the south east fringe of the plume originating from tanks 3, 4, 5 and 6. 5) Tank 8 TCA Solvent Storage Analytical results from the GeoProbe investigation in this area have not identified the existing contamination. The 8010 analysis did not detect any chlorinated hydrocarbons but the detection limits were raised from 5 ppb to 25 ppb. The boring logs indicate the presence of strong solvent odors in borings 1, 2 and 4 from 10 feet bgs to groundwater at 25 feet bgs with PID readings of up to 1,341 ppm. PHSIEHD recommends removal or remediation of the contaminated soil returened to.the tank excavation to a depth of approximately 12 feet and additional investigation of the contamination present beneath the former tank area in soil and groundwater. 6) Tanks 3 4 5 and 6 Gasoline Transmission fluid and Product Motor Oil Storage Analytical sampling of groundwater from this area indicates that the groundwater plume is defined in the areas of GP-14,16 and 17. Monitoring well 18 was installed beyond GP-14 to the east, monitoring well 12 has been installed beyond GP-17 to the west, MW-11 and MW-8 have been installed beyond GP-16 to the north and monitoring well 13 has been installed in the building south of the tanks. Analytical results from soil samples indicate the extent of the soil contamination in the area of GP-13 and GP-15 has been defined. The extent of soil contamination south of the original tank excavation has not been determined due to the presence of the building. A review of the PHSIEHD files reveal that there is no documentation indicating whether the soil from the UST removal was returned to the excavation or removed. The lack of manifesting documentation would indicate that the soil remained on site. PHS/EHD recommends removal or remediation of the