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UNDERGROUND STORAGE TANK REMOVAL REPORT CITY OF MANTECA UST REMOVAL 320 W. Center Street WKA No. 9041.01P March 25, 2011 1.0 INTRODUCTION Wallace-Kuhl & Associates (WKA) prepared this Underground Storage Tank Removal Report for the abandonment and removal of one underground storage tank (UST) at the City of Manteca park sate located at, 320 W. Center Street, Manteca, California (Figure I). This report was prepared on behalf of The City of Manteca. An UST was discovered during the construction of a sound %Nall between the future park expansion and the current Verison building (Refer to Figure 2 and Figure 3). The City of Manteca retained WKA to provide consulting services in support of activities to abandon the UST in accordance with current regulatory requirements. The scope of work summarized in this report included: coordinate contractor's activities to remove the UST from the ground, dispose of the UST and the liquid and solid waste associated with the UST removal activities at an offsite facility; and, consulting services to collect and submit for laboratory analysis soil samples collected from the UST cavity, compile collected data, and prepare this report. 1.1 Site Description The site is an irregular shaped parcel encompassing approximately 2.5 acres located at 320 W. .. Center Street in Manteca, California (Figure 2). The Stockton-San Joaquin County Public Manteca Branch Library is located on the northern portion of the property and Wilson Park is located on the southern portion of the property. The western finger of the property is the location of the proposed expansion of Wilson Park. At the time of our fieldwork the expansion area was a construction site. Some grading had occurred and part of Poplar Avenue had been removed. The site is bounded to the north by the Verison property and W. Central Street, to the south and west by the Manteca Tidewater Bikeway, beyond which is the Southern Pacific Rail Road, to the east by Manteca Avenue beyond which is commercial property. The site and surrounding areas are generally flat. The ground surface elevation on-site is approximately 30 feet above mean sea level (msl). The UST was discovered on the northern portion of the Wilson Park expansion area between the city and Version properties.