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DEPTH TQ GROUNDWATER & LOCATION OF WELLS: According to maps published by the County Flood Control District, groundwater is influenced by tidal action, and ranges from 5 to 10 feet below ground level_ Water did not enter the excavation which was about 10' deep after removal of the UST. However, during reexcavation of the site in April, 1993, the water table was found at a depth of 7 feet, and remained fairly constant during the work. PLATE IV shows depth to groundwater, sea level datums, in the Spring of 1986, the highest recorded levels during the past 10 years. However, it is most likely that the water table in the Port area fluctuates with tidal forces, which may vary by 5 or 6 feet. Groundwater was encountered at about 8. 5 feet during placement of the monitoring well_ M19H USE OF REMOVED UST: PLATE V is a generalized map of the property showing the location of the UST in relation to other features. The tank was used to fuel company vehicles and other equipment. It had been tested for integrity in September, 1990, and was shown to be tight. It was in good condition when removed. The associated piping and • fuel dispenser did not show any evidence of leaks or severe corrosion. Refer to prior reports for copies of the tank disposition tracking records tank tightness test records BRIEF REVIEW OF PRIOR WORE November 2. 1992 - A 1,000 gallon UST, dispensing pump and associated piping were removed from the property by Jim Thorpe Oil personel. Soil samples taken from beneath the removed tank were below detection limits, (refer to TABLE I for the results of those tests. ) A small amount of apparent contamination was noted on the north wall of the excavation. November_25. 1992 - The site was reentered to remove additional spoil from the north wall. Two (2) soil samples were taken; one of which revealed a minor amount of Toluene. TABLE II summarizes the results of laboratory analysis of those samples. February 11 . 1993 -- A workplan was prepared by Wm. J. Hunter & Associates, (WJH, ) to reenter the site and remove additional spoil. A copy of that workplan, (w/o attachments, ) is included as EXHIBIT E. April 6. 1993 - The site was again reentered to remove the remaining contamination that was present. The work was performed by Jim Thorpe Oil, (JTO, ) under the supervision of a registered geologist from WJB. Five (5) soil samples were taken from the sides of the excavation & three (3) from the removed spoil which 3