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Preliminary Investigation and Evaluation Report MOORE TRUCK LINES 3400 Newton Road, Stockton, California 1.0 INTRODUCTION AND SCOPE OF WORK At the request of Mr Eric Weilburg,Advanced GeoEnvironmentai, Inc (AGE) has prepared this Preliminary Investigation and Evaluation Report (PIER) for Moore Truck Lines located at 3400 Newton Road, Stockton, California (site) The location of the site is illustrated in Figure 1, a plan of the site is illustrated in Figure 2 The scope of work included the transportation and disposal of hydrocarbon-impacted stockpiled soil to an appropriate landfill facility, the advancement of five soil borings and the installation of one ground water monitoring well This report is prepared in accordance with guidelines established by the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and the Central Valley Regional Water Quality Control Board for investigation of underground storage tank (UST) sites 20 BACKGROUND • Based on analytical data from soil samples collected during the UST removal and additional laboratory results of soil samples characterizing stockpile No 3, PHS-EHD approved the Stockpiled Soil Disposition I,Vork Plan dated 07 May 1999 for the offsite disposal of soil stockpiles SP-1, SP-2, and SP-4, and excavation backfill procedures Additionally, PHS-EHD directed further subsurface investigation of the former UST area to assess hydrocarbon impact to soil and/or ground water at the site 30 PROCEDURES On 27 May 1999, under the direction of AGE, two Denbeste trucks transported two loads each of hydrocarbon-impacted soil, a total weight of 99 16 tons, to Forward Inc Landfill in Manteca, CA The stockpiled soil was identified as stockpiles SP-1, SP-2, and SP-4, and was generated from the UST removal that occurred on 13 January 1999 As a result of the analytical data confirming a low 1 level of hydrocarbon impact to stockpiled soil SP-3. and with approval by San Joaquin County PHS- EHD personnel, AGE directed the use of SP-3 material as backfill to be placed on top of imported self-compacting pea gravel backfill material Tasks and procedures for the sampling, removal, transportation, and disposal of the stockpiled soil to the landfill facility was conducted in accordance with the Stockpiled Soil Disposition Work Plan dated 07 May 1999, prepared by AGE Copies of all manifests and scale tags are included in Appendix C ;O Tasks and procedures for the subsurface investigation were completed by AGE personnel, or under AdiancedCcoEmiron mcntal, Inc