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• SOIL MANAGEMENT PLAN GEOMATRIX <br /> San Joaquin County APN 232-170-05 <br /> Burns Property, Tracy, California <br /> San Joaquin County APN 232-170-07 <br /> Pombo Property, Tracy, California <br /> 1.0 INTRODUCTION <br /> Geomatrix Consultants, Inc. (Geomatrix), has prepared this soil management plan on behalf of <br /> Chevron Environmental Management Company(CEMC) to address issues associated with <br /> residual crude oil and Bunker C oil in soil along a historic pipeline right-of-way that may be <br /> encountered during development, improvement, or maintenance activities at.the subject <br /> properties, hereinafter referred to as the Burns and Pombo properties, in Tracy, California <br /> (Figure 1). Future development activities at the Burns and Pombo properties might include <br /> construction of retail facilities, grading, paving, installation of subsurface utilities, and <br /> improvements such as landscaping. During these or any other unforeseen activities, soil <br /> • affected by degraded crude oil and Bunker C oil may be encountered between 6 to 19 feet <br /> below ground surface (bgs)primarily along the northern edge of the properties that fronts the <br /> Union Pacific Railroad Company(UPRC) right-of-way (ROW). <br /> The potential human health risk posed by the residual petroleum constituents detected in the <br /> soil and groundwater at the two sites was evaluated using the methodology presented in the <br /> Human Health Screening Evaluation of the Preliminary Endangerment Assessment Guidance <br /> Manual (PEA; Cal-EPA, 1994). Based on the results of this evaluation, residual petroleum <br /> constituents detected in soil and groundwater at the sites do not pose an unacceptable risk to <br /> human health or to the environment, under the conditions evaluated. <br /> This soil management plan is intended as a guideline for the handling, reuse, and disposal of <br /> soil affected by the degraded crude oil/Bunker C oil that may be encountered or excavated <br /> during site development, improvement, or maintenance. If oil-affected soil is encountered, <br /> CEMC should be contacted as soon as practical to provide consultation regarding the reuse or <br /> final disposition of the soil. Options for the reuse and disposal of oil-affected soil are outlined <br /> later in this document. This document is intended for distribution to CEMC, the developer, the <br /> construction contractor, and the San Joaquin County Public Health Services-Environmental <br /> Health Division (PHS-EHD). <br /> L\Doc_Sa fe\6000s\61 15.014\S M P.doc <br /> 1 <br />