ARCHIVED REPORTS XR0010118 - Laserfiche WebLink

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2.0 SUMMARY OF PREVIOUS ACTIVITIES AT FORMER TANK SITE I The following activities have been completed at former tank site 1 ' • Removal of a 500-gallon UST (February 1998), • Excavation of petroleum hydrocarbon-impacted soils and extraction of petroleum hydrocarbon-impacted ground water from the tank excavation (February to May 1998), 1 • Installation of seven soil borings, five ground water HydroPunches, and a monitoring well (April 1998), ' • Installation of two additional monitoring wells (November 1998), • Installation of three additional soil borings and one ground water ' HydroPunch (February 1999), Ground water remediation (dune 1999), and ' . Routine ground water monitoring during the period from May 1998 through February 2000 A description of each of these activities is provided in the following subsections Figure b illustrates the site features, soil and ground water sampling locations, and monitoring well locations at former tank site 1 ' Table 3 presents all soil sampling data generated during investigations at former tank site 1 Tables 4 and 5 present all ground water sampling data ' at former tank site 1 generated from HydroPunches and monitoring wells, respectively ' 2.1 TANK REMOVAL A summary of the tank removal activities is presented in Underground Storage Tank Removal Activities of Former Heinz Facility (ERM, 22 May 1998 ' hereinafter "Tank Removal Report") Accordingly, the tank removal activities are only briefly summarized below ' Under the supervision of City of Tracy Fire Department (CTFD) and PHS/EHD representatives, the 500-gallon UST was removed on 18 February 1998 ERM EnviroClean of Walnut Creek, California, was ' retained to remove the UST Erickson, Inc , of Richmond, California, was responsible for the transport and disposal of the UST, tank contents, and ' ERM 5 HEINZ USA-3374 60.3/27/OD