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r - INTRODUCTION The preparers of this report first visited the site on March 14, 1990; at which time most of the events described herein had al- ready taken place. This report consists basically of two parts: (1 ) a review of site activity, and (2) recommendations for other activity that will define the extent of the soil contaminated by either leaked fuel oil or other hydrocarbons. The reporting, of activities did not easily fit into either the DHS suggested for- mat for subsurface investigations or the Tri Regional-CVRB recommendations of July 1988, Rev. 3 April 1989. The DHS format has been followed as far as feasible: also. all data available for fitting the Tri -Regional .guidlines was included. Data used would in part fit both a DHS Preliminary Report and a Site Ass- essment Report , as well as a Tri Regional Soil Contamination Workplan and Soil Remediation Proposal . The report is not intended to be a Soil Remediation Proposal , which would normally follow final definition and probably ex- cavation of the contaminated soil . Definition of contamination has not as ye : been achieved. HISTORY OF SITE ACTIVITY All data herein regarding activity at the subject site were supplied by Jim Thorpe Oil , Inc. ( JTO) , which includes both ver- bal descriptions and documentation. All documents relating to previous activity that were available to Wm. J. Hunter & Associates are appended. 3TO filed a tank closure and removal plan with the SJLHD on Dec. 7, 1988 (Apo. A- 1 ) . The tank to be removed was described as Tank # 352, having, a 12,000 gal . capacity, later revised to 10,000 gallons. The regional location is seen on Figures i & 2. The tank had contained 11 6 crude oil , a heavy industrial boiler fuel , that had been used in the boiler room of an adjacent ware- house (Figs. 3 & 4, also App. A--7). The tank was thought to be empty at the time of removal . It had been in place for about 55 years insofar as is known (Aldo Freggiaro) . The Port of Stockton does not have any history of leaks or spills from the tank. The tank had been out of use since about 19F�6, when a cotton in that utilized steam from the boiler room switched to natural gas as a fuel . Some fuel oil had been left in the tank for some e of a natural gas supply failure, but no period of time in cas history of use was recorded. Between January 23 and 27, 1989 blacktop paving was removed and piping to the warehouse from under the adjacent concrete loadins, dock was cut and removed ( two steam lines and 2 product lines) ,