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x <br /> 1 <br /> s Coca-Cola Enterprises - West <br /> Job No. 90054 <br /> 1 <br /> 5/9/90 <br /> y USTEC conducted a soil gas survey consisting of twenty-eight soil gas point locations around <br /> the former USTs. The results of this survey indicated that the contamination plume was located <br /> south and east of the former gasoline UST with minimal lateral migration. <br /> E <br /> C 8/6190 <br /> t ' A subsurface investigation work plan. was submitted to Public Health Services, San Joaquin <br /> t. County, Environmental Health Division. <br /> #$ 8/13/90 <br /> Work Plan approved by Mr.Steven Schneider of the San Joaquin County Environmental Health <br /> Division. <br /> 8/27/90 <br /> USTEC conducted the first round of contamination assessment drilling. Groundwater monitoring <br /> wells MW-1 through MW-3 were installed, developed, and sampled. Three additional borings <br /> were drilled and sampled. No free product was discovered. <br /> 9/12/90 <br /> A second round of contamination assessment drilling was performed. Two additional <br /> groundwater monitoring wells (MW-4 and MW-5) were installed, developed and sampled. <br /> 1 Five additional soil borings were drilled and sampled. <br /> 71 <br /> ' 9/13/90 <br /> San Joaquin County Air Pollution Control District issued an aeration permit to conduct soil <br /> aeration of the conti—Linated soils generated during tank excavation and drilling activities at <br /> the site. <br /> 9/17/90 ' <br /> A monitoring well elevation survey was conducted by Mid-Valley Engineering, Inc. registered <br /> land surveyors, Modesto, California. <br /> ' .� 4 <br />