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Section 1 Project and Site Background Introduction Keir&Wright was retained by Grupe-Greenlaw Partners, to conduct soils suitability and nitrate loading studies for the proposed warehousing development(Project) located in Lodi, California, near the Northeast quadrant of the intersection of Highway 12 and Interstate 5.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 on-site wastewater treatment and disposal system (OWTS)for the Project, and describe conceptual systems conducive to Project site conditions. Subsequent site testing and specific treatment and disposal system designs will follow with future project planning document submittals and approvals. Proposed Development The proposed Project includes approximately 3.1 million square feet of warehousing&office space located on 199 acres, currently undeveloped. Six (6) buildings are proposed, each with individual OWTS's, allowing the Project to be subdivided into six(6) parcels.The facility and parking provides for an estimated 3,346 employees, assuming Building 1 will employ two (2) 8-hour shifts. Parking spaces will be included for employees and transport trailers. 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 be primarily from employee sanitation Site Description The project is located at 6015 State Route 12, Lodi, California, parcel number APN 02-519-015. Historically,the site was used for agricultural production.The site has been a grape vineyard for at least the past 20 years, according to the property owner. Ground elevations range from approximately 18' (northeast)to approximately 14' (northwest), sloping to the north at roughly 0.1%.The County zoning for the parcel is Industrial Warehousing (IW). Groundwater According to the State Department of Water Resources groundwater data base (CASGEM),the groundwater surface elevation is approximately 15'to 30' below ground surface (bgs), although there are no wells in the CASGEM system located on the Project site. As part of the percolation test, a 10' deep soil mantle pit did not reveal any standing water.As part of the Project planning and engineering, a geotechnical investigation will be performed at the site, including borings to determine accurate depth to groundwater. CASGEM data indicate the local groundwater gradient is west to east. 11 Page