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270 Oak Street The warehouse was generally square-shaped composed of two side-by-side metal-frame and corrugated metal sided building with elongate dome-shaped built-up roofs. The structure was erected on a slab-on- grade foundation. The building included some partitioned areas and a frame-constructed office area and restrooms in the south-central part of the structure. There were garage style doors on the northeastern and southeastern elevations of the structure, which was used for repairing and storing automobile and boats. The warehouse was roughly 100- by 100-feet and bordered by a material storage lot to the southeast and vacant lot to the northwest. The building appeared to have a clear height of roughly 22 feet. Historical information indicated the subject property was platted by the early 1900s with the building at 221 Oak Street constructed by 1905. Initially, this structure was the Manteca Winery. However, by the early 1920s a production warehouse was constructed immediately northwest of this brick masonry building and both buildings were used for food production operated by the Manteca Canning Company. By the late 1930s or early 1940s, the existing L-shaped building at 251 Oak Street was constructed and along with the previously constructed buildings on the northeast side of Oak Street was used for canning fruits and vegetables. Use of these buildings for canning continued until the early 1960s. The building adjacent to the northwest side of the brick masonry structure at 221 Oak Street was demolished by the mid-1960s. This area appeared to be a vacant lot until the existing metal frame and metal sided building at 229 Oak Street was constructed in the late 1990s or early 2000s. From at least the late 1960s or early 1970s to the late 2000s,these buildings were used for seed treatment and warehousing. The portion of the subject property on the southwest of Oak Street was initially developed in the early 1910s with single-family dwellings and vacant lots. By the early 1920s, this part of the site included the central steam plant for the Manteca Cannery Company, single-family dwellings, and a tenement house. By the early 1940s, the tenement house and at least one of the single-family dwellings was replaced with a small hotel and an office building. These structures were removed from the southwestern part of the site by the early 1960s and the existing metal frame and metal sided warehouse at 270 Oak Street was constructed with the areas southeast of this building consisting of a vacant land. The existing office building at 226 Oak Street appeared to have been constructed by the late 1980s or early 1990s. These building were reportedly used to support seed treatment and warehousing activities from the late 1960s or early 1970s to the late 2000s. A street map, topographic map, and site sketch depicting the location, topography, and general layout of the subject property are included as Figures 1,2 and 3. 1.2 Background The Phase I ESA of the site was completed on 16-Apr-2013. The recognized environmental conditions associated with historical and current uses of the site identified in this report,included: • There were roughly eight 55-gallon drums of motor oil, used/waste oil, and other automotive fluids; about forty 5-gallon containers of motor oil, hydraulic fluid, and paints; and more than one-hundred 1-gallon containers of paint used/waste oil, antifreeze, and other automotive fluids. The presence of 55-gallon drums of petroleum products and automotive fluids in volumes greater than reportable quantities would be a recognized environmental condition due to the material threat of spills, releases, or unauthorized discharges necessitating notification of the applicable environmental regulatory agency and mitigation activities to address the potential environmental impact. The material threat of spill(s)or release(s)appeared to be amplified by the location of 55-gallon drums in areas generally unprotected from vehicle strike and lack of a secondary containment. However, at Zions First National Bank Limited Subsurface Investigation 3 �)uCh,,,, Valentine Properties—Manteca, California