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Section 1 Project and Site Background Introduction Keir & Wright was retained by Prologis, Inc., to conduct soils suitability and nitrate loading studies for the proposed International Park of Commerce, Phase II (IPC 11) warehousing development (Project) located in Tracy, California. The plan proposes the construction of private onsite water, sewer, and storm drainage facilities to service the planned development. The following was prepared in accordance with the requirements of the San Joaquin County Environmental Health Department (SJCEHD). The purpose of the report is to propose use of Project treated wastewater as a source of an unrestricted, non -potable water supply for irrigation of Project landscaping, and to describe conceptual systems conducive to Project site conditions. Detailed treatment system designs will follow with future project planning document submittals and approvals. Proposed Development The proposed Project involves the phased build -out of a 284 acre site by developing up to 5,219,740 square feet of warehouse and logistics buildings. The fully developed Project is estimated to include 4,611 employees. Other dedicated areas on the site will include storm runoff detention and landscaping (see Figure 1). The proposed Project is a "low water use" development, as no process water will be used, and there will be no restaurants or food preparation facilities. Water use and wastewater production will primarily result from employee sanitation. Site Description The Project site is located on the north and south side of W. Schulte Road, west of S. Lammers Road, in Tracy, California (APN/Address: 209-250-10 & -37, 209-240-36 & -37 / 14320 W. Schulte Rd). Historically, the site was used for agricultural production. The site has been an almond orchard for at least the past 20 years, according to the property owners. Ground elevations range from approximately 155' (southwest) to approximately 90' (northeast), sloping generally to the north at roughly 1.1%. The Property is zoned AG -40 (General Agriculture, 40 -acre minimum) and the General Plan designation is A/G (General Agriculture). A site plan is provided in Appendix A. Groundwater According to the State Department of Water Resources groundwater data base (CASGEM), the groundwater surface elevation is approximately 25' to 80' below ground surface (bgs), although there are no wells in the CASGEM system located on the Project site. An agricultural well exists in the south west corner of the project used emergency water when the local irrigation district cannot provide an adequate surface water supply. No information can be found for this well. The well will be destroyed as part of the Project improvements. 11 Page