ARCHIVED REPORTS XR0010118 - Laserfiche WebLink

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' 30 SUMMARY OF PREVIOUS ACTIVITIES AT FORMER TANK SITE 2 The following activities were completed at former tank site 2 These were ' conducted concurrently with activities described above for former tank site 1 ' + Removal of a 2,000-gallon UST (February 1998), • Excavation of petroleum hydrocarbon-impacted soil and extraction of petroleum hydrocarbon-impacted ground water from the tank excavation (February to March 1998), • Installation of nine soil borings, five ground water HydroPunches, and ' a monitoring well (April 1998), • Installation of two additional monitoring wells (November 1998), ' • Installation of one additional soil boring and ground water HydroPunch (February 1999), ' • Ground water remediation (June 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 9 illustrates site features, soil and ground water sampling locations, and monitoring well locations at former tank site 2 ' Table b presents all soil sampling data generated during investigations at former tank site 2 Tables 7 and 8 present all ground water sampling data at former tank site 2 generated from HydroPunches and morutoring wells, trespectively ' 31 TANK REMOVAL ' A summary of the tank removal activities is presented in the Tank Removal Report Accordingly, the tank removal activities are only briefly summarized below Under the supervision of CTFD and PHS/EHD representatives, the 2,000- 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 tank rinsate The top of the tank was severely ' ERM 11 HEINZ USA-3374 60-3/27/00