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Lennar Homes of California Mountain House Creek, Parcel L, Tract 3424, Tracy 4943.410.103 Phase I Environmental Site Assessment 3.2.1 Historical Topographic Maps/Aerial Photographs/Sanborn Maps Historical USGS topographic maps, aerial photographs, and Sanborn Fire insurance maps were reviewed to determine if discernible changes pertaining to the Property had been recorded. EDR provided the following maps and photographs, presented in Appendices C and D. No Sanborn maps were identified for the Property; a copy of the Sanborn Map search report is presented in Appendix E. TABLE 3.2.1-1: Historical Review Summary HISTORICAL • . Topographic Maps 1914, 1916, 1940, 1943, 1952, 1968, 1978, 2012, 2015, 2018 Aerial Photographs 1937, 1940, 1949, 1957, 1966, 1975, 1979, 1982, 1993, 1998, 2006, 2009, 2012, 2016 Sanborn Maps N/A(unmapped property) The Property is shown as undeveloped land on topographic maps from 1914 through 2012. The surrounding areas include the Southern Pacific Railroad line to the north and Mountain House Creek to the south-southeast, and one structure is shown south of the Property until the 1952 map. Aerial photographs show that the Property was undeveloped agricultural land from 1937 until 2006, when construction of the off-site wetlands and the on-site drainage canals are visibly under construction. Beginning with 2006, areas to the west of the Property are under development for residential neighborhoods. In 2016, the adjacent areas to the north, west, and south of the Property have been developed into the Mountain House residential development. From 2009 to 2016, residential development continued to increase to the west and northwest of the Property. By 2016, the Property and adjacent areas look similar to the current configuration. 3.2.2 City Directory City Directories, published since the 18th century for major towns and cities, list the name of the resident or business associated with each address. The Property was not identified during the search. Properties identified in the City Directory include names of private individuals, likely indicating residential properties. A City Directory search conducted by EDR is located in Appendix F. 3.3 ENVIRONMENTAL RECORD SOURCES EDR performed a search of federal, tribal, state, and local databases regarding the Property and nearby properties. Details regarding the databases searched by EDR are provided in Appendix A. A list of the facilities documented by EDR within the approximate minimum search distance of the Property is provided below. 3.3.1 Environmental Records 3.3.1.1 Subject Property The Property is not listed on Environmental Record source databases. ENGEO January 28, 2022 Expect Excellence