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u property is Landlow adobe clay, which is described as dark grayish brown in color, neutral to calcareous, with good to imperfect drainage. The storie index is .39, indicative of a soil type poorly suited for agricultural use. Lithologies encountered during excavation consisted of about 2 to 3 feet of black, organic peaty loam on top, grading to a tan to buff colored sandy clay, (Landlow. ) DEPTH TO GROUNDWATER: A review of County Flood Control District maps indicated that the water table was the highest in the spring of 1986. Plate IV is a portion of that map, which shows that the -20 ' contour passes almost directly under the property. The USGS- topographic map indicates that ground elevation at the site is about 25' sea level datum. Therefore, the water table would have been at approximately 45 feet below ground level in the Spring of 1986. HISTORY OF SITE: The property has been used exclusively for the sale, service, and repair of mobile homes since the present occupant leased the property in 1972. The UST was installed in 1972, and used for fueling various vehicles associated with the business. DETAILS OF PRIOR WORK: Tank Removal : On January 22, 1992, Jim Thorpe Oil Inc. made application to the County EHD for removal of one (i) 1 ,000 gallon UST, ID# 255-01 , which had contained regular leaded and unleaded gasoline; refer to Exhibit A for those documents. On January 31 , the tank was removed by the above firm; it was reported to be in good condition and free from holes caused by corrosion. After the tank was pulled, some discoloration of soil was noted at the east, (fill ) end on the wall of the excavation. Soil samples were taken at a depth of 8 feet from the west end of the pit, and at 10 feet from the east end as directed by a representative of the EHD. Neither sample showed any evidence of discoloration, and no petroleum odors were noted. A sample was taken from a portion of the removed spoil which showed evidence of discoloration and had a hydrocarbon odor. The spoil was stored on plastic adjacent to the excavation awaiting results of the laboratory analysis. The removed tank was properly cleaned and transported to a disposal facility; refer to Exhibit C for copies of the appropriate documents. y The soil samples were transported under proper chain-of-custody 2 lJ