SITE INFORMATION AND CORRESPONDENCE

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r • 1.4 Purpose. The purpose of this Agreement is for the Proponents to conduct a Health Risk Assessment and carry out appropriate public participation activities under the oversight of, and subject to approval by, DTSC and for DTSC to review and comment on the site characterization and other remedial actions and closure activities performed by Proponents under the primary oversight of the California Regional Water Quality Control Board, Central Valley Region (RWQCB). Proponents previously entered into a separate Oversight Cost Reimbursement Agreement with the RWQCB under which Proponents are conducting characterization and other remedial actions and closure activities at the Site, with the RWQCB functioning as the lead oversight agency. The purpose of this Agreement is also for DTSC to obtain reimbursement from the Proponents for DTSC's oversight costs. DTSC will work in conjunction with the RWQCB. II. BACKGROUND 2.1 Ownershiii. The Site is owned by New Delta Gateway Partners, c/o Rudy Bilawski, Esq., Neumiller & Beardslee, 509 W. Weber Avenue, 5'" Floor, Stockton, California 95203. 2.2 Substances Found at the Site. Laboratory Reports included in the Sampling Report contain the results of soil sampling conducted at the Site on November 17, 2000. These reports indicate that portions of the soil are contaminated with hazardous constituents, including: lead as high as 294 milligrams per kilogram (mg/kg); total petroleum hydrocarbons (as motor oil) as high as 1,600 mg/kg; ethylbenzene as high as 23 mg/kg; 1,2,4-trimethylbenzene as high as 140 mg/kg; 1,3,5-trimethylbenzene as high as 42 mg/kg; o-xylene as high as 37 mg/kg; (m&p)-xylenes as high as 120 mg/kg; and, 2- methyl naphthalene as high as 2.1 mg/kg. 2.3 Physical Description. The Site is occupied by an apartment complex consisting of the following: approximately 200 apartments constructed as two-story buildings; paved drive ways; covered and uncovered parking areas; unpaved common areas between apartment buildings; and a series of ponds/canals in some of the common areas between apartment buildings. The Mormon Slough borders the property on the west and south, West Weber Avenue borders the property on the north, and vacant land borders the property on the east. 2.4 Site History. According to Chains of Title and lease agreements the following companies have historically either owned or leased various portions of the Site: Standard Oil Company; Tidewater Oil Company; Phillips Petroleum Company; E.D. Wilkinson Grain Company; Chevron USA Incorporated; Associated Oil Company; Lion Oil Company a subsidiary of Tosco Corporation; L&M Petroleum Company; City of Stockton, Redevelopment Agency; and the New Delta Gateway Partners. Portions of the Site were used for bulk storage and distribution of petroleum products. Bulk storage of the petroleum products was accomplished by the use of above ground and underground tanks and their associated appurtenances. According to plot diagrams there appears to have been underground piping which connected the Site to the Stockton Channel docks. 2