SITE INFORMATION AND CORRESPONDENCE

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2.2 Substan-ces-EQunciatthe-Bite. Information contained in a report entitled "Soil and Groundwater Investigation and Screening Health Risk Assessment of the Old Valley Pipeline Right-of-Way," dated September 1999 and prepared by Geomatrix Consultants, states soil and groundwater sampling was conducted at the Site. Sampling indicates the presence of petroleum hydrocarbon in soils and low levels of petroleum constituents including benzene, toluene, ethylbenzene, xylenes, and poly aromatic hydrocarbons detected in either soil or groundwater. 2.3 Physical Description. The Mansfield property consists of a 17-acre parcel located west of Southern Pacific Railway and Byron Road, and north of interstate 205. The parcel is occupied by a single residential home and is used for grazing cattle. The Chevron pipeline right-of-way runs along the southern border of the property. 2.4 Site History. From the early 1900's to the 1950's, the Old Valley Pipeline was used by Standard Oil Company (now Chevron) to transport heavy petroleum (crude oil) from Bakersfield to Richmond, California. The easement for the pipeline exists on the southern portion of the Mansfield's property. Pipes were typically buried four feet below grade and had the occasion to leak. While there is no exact incident of a release from the pipeline, residual contamination found in soils are likely associated with the pipeline and needs to be evaluated to determine if there exists a risk to public health or the environment prior to the construction of the proposed multi-family residential complex. III. AGREEMENT 3.0 IT IS HEREBY AGREED THAT DTSC will provide review and oversight of the response activities conducted by the Proponent in accordance with the Scope of Work contained in Exhibit C. The Proponent shall conduct the activities in the manner specified herein and in accordance with the schedule specified in Exhibit E. All work shall be performed consistent with H&SC section 25300 et seq., as amended; the National Contingency Plan (40 Code of Federal Regulations (CFR) Part 300), as amended; U.S. EPA and DTSC Superfund guidance documents regarding site investigation and remediation. 3.1 Scone of Work and DTSC Oversight. DTSC shall review and provide Proponent with written comments on all Propohent deliverables as described in Exhibit C (Scope of Work) and other documents applicable to the scope of the project. DTSC shall provide oversight of field activities, including sampling and remedial activities, a's appropriate. DTSC's completion of activities described above shall constitute DTSC's complete performance under this Agreement. 3.2 Additional Activities. Additional activities may be conducted and DTSC oversight provided by amendment to this Agreement or Exhibits hereto in,accordance with Paragraph 3.17. If DTSC expects additional oversight costs to be incurred related to these additional activities, it will provide an estimate of the additional oversight cost to the Proponent. 2