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2.2 Substances Found at the Site. Reports, containing the results of environmental media sampling conducted at the Site, indicate that the soil is contaminated with hazardous substances, including total petroleum hvdrocarbons (TPH) and their constituents, volatile organic compounds, and heavy metals. 2.3 Physical Description. The site is a former drilling mud disposal facility located in the city of Holt, approximately 7 miles southwest of Stockton, California. The site consists of three and a half acres in the southern part of the former Arcady Dump. The site is bordered on the East by Whiskey Slough Road and on the West by the Whiskey Slough waterway. 2.4 Site History Prior to 1960, the site was used as a local dumpb ground for disposal of domestic wastes. From 1960 to 1984, the prone was on re ated as-,p drilling mud disposal facility under certification by the Reaion atPr�1V �SZp�ol Board (RWQCB) as a Class III disposal site (under RWQCB Order No. 76-152). Prior to its closing in 1984, approximately 42,000 cubic yards of non hazardous drilling mud were deposited at the site. Between 1976 and 1984, numerous violations to the RWQCB Order No. 76-152 reportedly occurred. In 1985, the facility was placed on the State Priority Ranking List by the California Department of Health Services. In early 1986, a break in the Southern Pacific Pipelines adjacent to the northern boundary of the northern parcel released an unspecified volume of Petroleum products. In January 1989, Ecology and Environment, Inc., conducted a screening site inspection and found that surface water and soil/groundwater in the vicinity of the facility might be impacted. 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 Scope of Work and DTSC Oversight. DTSC shall review and provide Proponent with written comments on all Proponent 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, as appropriate. DTSC's reposnibilites shall include assistance to the California Regional Water Quality Control Board in their role as lead oversight agency at this Site. DTSC's completion of activities described above shall constitute DTSC's complete performance under this Agreement. 2