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11/13/2003 09:04 9497231 FREY ENVIRONMENTAL PAGE 04/1 - • 3 PROPOSED EXCAVATION ACTIVITIES Prefield Activities FREY will modify the Site specific health and safety plan used during the collection of soil samples on September 18 and November 3,2003. The health and safety plan will incorporate the proposed excavation activities discussed below. Excavation activities are scheduled for November 14,2003. Soil Excavation FREY proposes to excavate a limited volume of soil containing petroleum hydrocarbons from the areas of previously collected soil samples D5,D8 and D9. A backhoe will be used to excavate three separate areas each approximately 5 feet wide by 5 feet long by 10 feet deep. Excavated soils will be stockpiled on plastic and covered with plastic sheeting pending off-Site transport and disposal. Physical observations of stained/discolored or odorous soils will be used to assess the occurrence of petroleum hydrocarbons in soil and evaluate the extent of excavation necessary to remove soils containing petroleum hydrocarbons. Hydrocarbon concentrations will be monitored with a photo-ionization detector. Soil Confirmation Sampling Once excavation activities are judged complete in each area,soil samples will be collected by FREY personnel. One sidewall sample will be collected from the center of each sidewall and one bottom sample will be collected from the bottom of each excavation. Thus, a total of 15 soil samples will be collected as part of excavation activities. Soil samples will be collected from the center of the backhoe bucket in 2-inch by 6-inch brass tubes. The brass tubes will be pushed or driven with a mallet into soil located in the center of the backhoe bucket. Once the sample tube is full of soil, each end will be covered with aluminum foil or teflon tape and covered with air tight plastic end caps. Each sample will be labeled with the area of excavation(135,D8 or 139),sidewall location(north,south,east,west or bottom),sample depth and time and date of sample collection. Once labeling is complete,each soil sample will be immediately placed into an ice chest cooled with ice. Excavation Backfill Each excavation will be backfilled with imported soil or gravel upon completion of soil sampling activities. Backfill material will be placed in maximum two foot lifts,compacted with mechanized equipment and resurfaced to match the surrounding surface area.