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Soil Suitability / Nitrate Loading Study <br />Ernst Property ■Tracy,CA <br />February 21, 2019 revised April 9, 2019 ■ Terracon Project No.NA197000 <br />Responsive ■Resourceful ■Reliable 4 <br />1.1.2 Proposed Development <br />Based on information provided by Mr. Warren, the site is proposed to be developed with an <br />approximately 1,400 SF mobile home near the northwest corner of the site and an additional <br />septic system. <br />1.1.3 Site Vicinity <br />The adjoining properties are developed with residences. A detailed vicinity map is included in <br />Appendix A (Exhibit 1). <br />1.1.4 Site Map <br />A detailed site map is included in Appendix A (Exhibit 2). <br />1.2 Present and Past Uses of the Site <br />1.2.1 Past and Present Site Use <br />Terracon reviewed the USGS, Tesla (1907, 1943) and Midway (1916, 1953) California <br />Quadrangle topographic maps, four historical aerial photographs dated 1940, 1952, 1963, and <br />1975 provided by the San Joaquin County Surveyors Office, and GoogleEarthTM aerial <br />photographs dated 1993 through 2018 to establish a history for the site. The following table is a <br />description of the site based on the source. <br />Table 1. <br />Historical Information. <br />Year Source Description <br />1907 Topo Undeveloped land <br />1916 Topo Undeveloped land <br />1940 Aerial <br />Agricultural land use/row crops <br />1943 Topo <br />1952 Aerial <br />1953 Topo <br />1963 Aerial <br />1975 Aerial <br />1993 Aerial <br />Developed with the existing residence. Storage unit added to the site by 2003.2003 Aerial <br />2014 Aerial <br />Based on a review of the historical information, the site appeared to consist of undeveloped land <br />in the early 1900s, was developed with agricultural row crops from as early as 1940 through the <br />mid-1970s, and was developed with the existing residence by the early 1990s. It should be noted,