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kn KLEINFELDER <br /> 2 BACKGROUND <br /> The Tracy Community Memorial :Hospital (TCMH) is located at 1420 North 'Tracy <br /> . Boulevard in Tracy, California (Plate 1, Site Location Map). Recent construction at the <br /> hospital and SJLHD regulations necessitated the removal of two underground storage <br /> tanks. It is Kieinfelder's understanding that a 500-gallon diesel tank and a 5,000-gallon <br /> diesel tank were removed from the site on September 19, 1988. For safety purposes the <br /> excavation was backfilled shortly thereafter. <br /> Kleinfelder was retained by TCMH and conducted a Phase I and II soil assessment on <br /> December 1, 1988, and January 24, 25, and 27, 1989, based on analytical 'results obtained <br /> from samples beneath the tanks at the time of excavation. Results of these investigations <br /> are presented in Kleinfelder's soil; investigation',reports dated December 9, 1988, and <br /> February 13, 1989. Phase I activities consisted of.drilling and sampling seven soil borings <br /> to assess the extent of the subsurface contamination:_ Phase II activities consisted of soil <br /> excavation, in which contaminated soil was tested and hauled off for proper disposal. The <br /> excavation proceedings were stopped and a small amount of contaminated soil was left in <br /> the ground. Further excavation in that area would have compromised the integrity of an <br /> existing structure. The excavation was subsequently backfilled with clean fill by TCMH for <br /> safety purposes. <br /> The San Joaquin Local Health District (SJLHD) requested that TCMH assess the ground <br /> water in the vicinity of the former underground tanks for the presence of petroleum <br /> hydrocarbon contamination. <br /> ,t <br /> { <br /> 1 <br /> k <br /> _ 1 <br /> 175-89-543 2 <br /> N <br /> Ih <br /> S <br />