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627 W. Vernalis Road 7/16101 <br /> Tracy, California Page 4 <br /> Year Description Source <br /> 1937 Agriculture—row crops. Aerial photograph <br /> 1952 Agriculture—row crops. Aerial photograph <br /> 1963 Agriculture—row crops. Aerial photograph <br /> h 1975 Agriculture—row crops. Aerial photograph <br /> 1983 Agriculture—orchard. Aerial photograph <br /> 1987 Agriculture—orchard. Aerial photograph <br /> 1993 Agriculture—orchard. Aerial photograph <br /> Agricultural chemicals have been applied to the subject property in the past. According to Mr. <br /> Surjit Toor, no, agricultural chemicals have been stored or mixed on-site for at least <br /> approximately fifteen years.:. <br /> 3.6 Current and Past Use of Adjoining Properties <br /> Current uses of adjoining properties observed during the site reconnaissance are as follows: <br /> North: Agriculture. <br /> South: W. Vernalis Road/Highway 132/agriculture. <br /> East: Agriculture. <br /> West: Agriculture, single family residence. <br /> Color photographs of current adjoining properties are included in Appendix B. <br /> Historical adjoining property uses included, but may not be limited to, rural single family <br /> (' residences and agriculture. No apparent significant historical adjoining property uses were <br /> .� identified in the information sources that were reviewed by PEM during the preparation of this <br /> report. <br /> 4.0 RECORDS REVIEW <br /> 4.1 Physical Setting Sources <br /> The Geocheck — Physical Setting Source Addendum provided in the Environmental Data <br /> Resources Radius Map Report identifies the general topographic gradient in the area of the '. <br /> subject property to the north-northeast. This topographic gradient is determined from the USGS <br /> 1 Degree Digital Elevation Model. <br /> The dominant soil composition in the general area of the subject property as reported in the <br /> Geocheck -- Physical Setting Source Addendum is described as Class D — very slow infiltration <br /> rates. Soils are described as clayey, have a high water table, or are shallow to an impervious <br /> layer. Additional soil types which may be present in the general area of the subject property <br /> include: clay loam, gravelly — clay loam, fine sandy loam, loam , extemely gravelly — sand, <br /> gravelly — loam, and gravelly — sandy loam. This general soil composition description is based <br /> k on the U.S. Department of Agriculture's Soil Conservation Service data. <br /> j <br />