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1 1 1 1 10 August 1998 AGE-NC Project No. 98-0471 Page 2 of 8 operating(approximately 1,000-gallon) AST with a portion of its system lines buried; and an area used for waste oil handling and possibly disposal. 3.0. PROCEDURES 3.1. EXCAVATION AND TRENCHING PROCEDURES On 08 July 1998,trenching was performed in areas of concern to assess whether or not hydrocarbon releases had impacted soil and ground water on the site and to attempt to remove impacted soil if encountered. Approximately 52.5 tons soil were removed from the areas trenched: the large AST area;the smaller AST area; and the waste oil handling area. Ground water was encountered in two excavations at a depth of approximately 8 feet below surface grade (bsg), however the water level eventually stabilized at 6.5 feet bsg. The approximate excavation limits are depicted on Figure 2. Trench T1 was established next to the small AST; trench T2 and T3 were installed near the south side of the maintenance compound in the oil handling area and trench T4 was installed at the eastern edge of the dispenser for the 7,500-gallon AST. Soil samples were collected at 2 feet bsg from the east edge of trench T1, from the west edge of trench T1 and from the north edge of T1. A soil sample was also collected from the floor of the trench, prior to the intrusion of ground water. At this point a"grab" water sample was collected with a disposable bailer from the water which intruded into trench T1. An odor of fuel was observed in the trench. Immediately upon retrieval, the water sample was transferred into a chilled 40-m1 EPA-approved VOA vial containing 0.5 ml concentrated hydrochloric acid as a sample preservative. The sample was placed in a chilled container for subsequent transport to a state-certified analytical laboratory. One sample was collected from trenches T2 and T3 at depths of three feet bsg. One sample was collected from trench T4 at a depth of two feet bsg, under the dispenser side of the trench. Two additional samples were collected at each end of the floor of the trench at a depth of eight feet bsg. Four samples were collected from the soil stockpile for laboratory compositing. Each soil sample was collected with a metric soil sampling hammer, loaded with a pre-cleaned brass sleeve. Samples were collected by a representative of AGE. The ends of the brass sleeves were covered with a Teflon plastic sheets, caps and were sealed with tape. The samples were labeled and placed in a chilled container for subsequent transport to a state-certified analytical laboratory. The date and time soil samples were taken were noted on the chain-of-custody form included with the Advanced GeoEnvironmental,Inc.