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Environmental Setting The project site is located in southern San Joaquin County in an unnumbered section of Township 2S, Range 6E of the USGS 7.5-minute Lathrop topographic quadrangle (Figure 1). The project site is composed of a 161 +/-acre parcel in the vicinity of the Interstate 5 and State Route 120 interchange, south of Madruga Road, near Lathrop, California. The project site is located between 10 and 15 feet elevation and is bounded by Southern Pacific Railroad to the south, the San Joaquin River to the west, fallow fields to the northwest, and residences with associated pastureland to the east. The entire project site is an almond orchard. Vegetation Most of the natural vegetation in the project site is restricted to the edges of the property and adjacent buffer areas (i.e., along the railroad track berm and San Joaquin River levee). This vegetation consists of an assortment of non-native annual grassland grass and weed species. Within the existing almond orchard, ground-level vegetation may be best described as ruderal, with orchard development and maintenance significantly limiting the growth of grasses and weeds. Vegetation between the tree rows consists of a subset of the non-native annual grassland grass and weed species found in open areas surrounding the orchard. Plant species documented within the project site during the 2000 survey are listed in Table 1. The only trees within the project site boundaries are almonds. Tree species adjacent to the project site include Fremont's cottonwood (Populus fremonth), red willow (Salix loevigata), valley oak (Quercus lobata) and tobacco tree (Nicotiona glauca). Some of these trees adjacent to the project site are over 50 feet tall. Wetlands There are no areas in the project site which meet the technical criteria to be delineated as Waters of the U.S. or wetlands which fall under the jurisdiction of the U.S. Army Corps of Engineers. There are no vernal pools, streams, stock ponds, or any other types of wetlands in the project site. Landmark Lathrop: Biology 3 January 19, 2000