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r <br /> spoil was removed. Refer to EXHIBIT A for details_ <br /> Since it was decided that further excavation was not feasible, <br /> the removed spoil was remediated on site by aeration over a <br /> period of weeks. Laboratory analysis of the soil after treatment <br /> showed it to be clean, and the EHD authorized returning it to the <br /> excavation. Refer to EXHIBIT G for a copy of that correspon- <br /> dence. <br /> Ogtgber 4 A 5. 1990 - Five (5) auger holes were placed in an <br /> attempt to further define the plume. Four were located on Normac <br /> property, and one was located to the west of the tank site on <br /> property owned by Hammertown Partners. The locations of those 5 <br /> holes are shown on 04M_Q1. Details are given in EXHIBIT _G. <br /> Aiwril 8 & 9, 1992 - Because the previous work had not determined <br /> the vertical & lateral extent of the contamination, six (6) addi- <br /> tional auger holes were placed as shown on PLATE VI . The limits <br /> were defined except in a southerly direction on the Hammertown <br /> property. MJBIT D gives more details of the work performed. <br /> AUgust 13. 1992 - Three additional soil borings were located on <br /> Hammertown Partners property as shown on L?LME 111, EXHIBIT E <br /> discusses the results of that work, which revealed that Toluene <br /> was detected in all three holes at 40' bgl, which was the approx- <br /> mate water table level in the Spring of 1986 <br /> As a result of the above work, the County EHD staff had required <br /> that monitoring wells be installed to determine if the ground- <br /> water had been impacted by the leaking OST. During a recent <br /> meeting with members of the EHD staff, it was agreed that add- <br /> itional soil & water sampling might be sufficient to determine if <br /> the remaining residual contamination will pose a threat to the <br /> groundwater. The following workplan is designed to accomplish <br /> that task. <br /> DETAILS OF WORK EERE-ORMID UNM KQEULAHT NOYEHM 5. 1993; <br /> WIL & NAM 9MRLIHQN NORMAG & <br /> HAMMMT-QNS PROPERTIES` <br /> On January 14, 1994, Osterberg & Stewart Drilling Co. mobilized a <br /> C-57 auger rig over TB--2, located on the Hammertown Property as <br /> shown on PLATE 9II. Wally Maggert was the driller, and Mike <br /> Davis the helper. Wm. Hunter, RG, of Wm. J. Hunter & Associates, <br /> (WJH, ) was on site to supervise drilling and sampling operations. <br /> He was assisted by Don Light of Del-Tech Geotechnical. Drilling <br /> equipment consisted of clean, 8 1/4" OD, 5' long auger flights; <br /> the coring assembly consisted of a 30" long, split-spoon sample <br /> 3 <br />