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Site Background Information- Fernando's Place AGE-NC Project No 00-0769 IPage 3 of 4 The fuel additives di-Isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETRE),methyl tertiary-butyl ether(MTBE),tertiary-amyl methyl ether(TAME),tertiary-butyl alcohol(TBA),ethylene dibromide (EDB),and 1,2-DCA were not detected in the soil samples collected and analyzed from the three soil bonngs Additional volatile organic compounds (VOCs)detected in the analyzed samples Included Isopropylbenzene,n-propylbenzene, 1,3,5-tnmethylbenzene, 1,2,4-tnmethylbenzene, p-Isopropyl- toluene, and naphthalene GROUND WATER DEPTH AND GRADIENT Based on quarterly ground water monitoring events conducted by AGE,depth to ground water at the property is approximately 20 feet to 30 feet bsg The prevailing ground water flow direction Is generally northeast, although flow directions may vary locally and seasonally Depth to first encountered ground water at the property during the last quarter was measured to be approximately 27 feet bsg HYDROGEOLOGIC UNITS Based on cross sections A-A'and B-B',AGE informally Identified five hydrologic flow units,located between first encountered ground water and 199 feet bag, as having significant intervals of apparently porous,coarser-grained soil separated by intervals of finer-grained,less permeable soil Hydrogeologic Unit 1 (HU-1)was subdivided Into three sub-umts(HU-1 Upper Zone,HU-1 Middle I Zone, and HU-1 Lower Zone) that may not have significant barriers to vertical migration of contaminants Generally, HU-1 Upper Zone was Identified at depths between 25 feet (first encountered ground water) and 51 feet bsg, 11U-1 Middle Zone was Identified at depths between I 48 feet and 75 feet bsg,HU-1 Lower Zone was Identified at depths between 60 feet and 90 feet bsg Hydrogeologic Unit 2 (HU-2) was Identified at depths between 112 feet and 125 feet bsg and consists pnmanly of a continuous layer of sand Hydrogeologic Unit 3 (HU-3) was Identified at depths between 140 feet and 160 feet bsg and consists primarily of a continuous layer of sand Hydrogeologic Unit 4 (HU-4) was identified at depths between 160 feet and 175 feet bsg and consists of a locally contained layer of sand Hydrogeologic Unit 5 (HU-5)was identified at depths between 190 feet and 199 feet bsg and consists of a locally contained layer of sand HYDROCARBON-IMPACTED SOLI. AND GROUND WATER Based on the analytical results of soil samples collected during the August and September 2002 investigation and previous subsurface Investigations,cross sections illustrating the inferred vertical and horizontal extent of hydrocarbon-impacted soil were constructed hydrocarbon-Impacted soil Advanced GeoEnvironmental,Inc