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10 June 2019 AdvancedGeo AGE Project No. 19-4696 FnvironmentaI Page 2 of 13 IV Property Owner(s) JOHN M PETLANSKY & MICHELE KOONS PETLANSKY TRUST Land Use Type AGRICULTURAL Legal Description LOT 01, AS SHOWN UPON THE MAP ENTITLED "Y- FARMS", FILED FOR RECORD 2000 IN BOOK 255, PAGE 34, SAN JOAQUIN COUNTY RECORDS Size of Property 43.1 acres Property parcel map and owner information were provided by ParcelQuest/CD Data as a representation of current data downloaded monthly from the County Assessor's Office. Copies of the parcel map and the owner information are provided in Appendix A. 2.2. SITE AND VICINITY GENERAL CHARACTERISTICS The subject property is located within an agricultural area of unincorporated San Joaquin County, southeast of the City of Tracy, California. Figure 1 shows the setting of the subject property (7.5 Minute United States Geological Survey [USGS] Topographic Series, VERNALIS, California) and prominent features on the subject property are depicted in the site plan provided as Figures 2 and 3. Photographs of the subject property are provided in Appendix B. 2.3. CURRENT USE OF PROPERTY The property is utilized as single family residential. At the time of the site reconnaissance, the site was occupied by workers and/or home owners. 3.0. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING Geology and The property is situated within the Great Valley Geomorphic Province of Hydrology California, a large, elongate, northwest-trending, asymmetric structural trough. The Great Valley Province has been filled with thick sequences of sediment ranging in age from Jurassic to Recent, creating a nearly flat- lying alluvial plain that extends from the Tehachapi Mountains in the south to the Klamath Mountains in the north. Western and eastern boundaries of this province are comprised of the California Coast Range and the Sierra Nevada, respectively. Rocks composing the basement complex of the province have not been completely defined but are believed to be of metamorphic and igneous origins. Northern and southern portions of the Great Valley Province have been designated the Sacramento and San Joaquin Valleys, respectively. Modesto, Riverbank, and Turlock Lake Formations and overlying Recent alluvium are the principal source of domestic ground water in the 13,500- square-mile San Joaquin Valley Ground Water Basin (Basin 5-22). This basin is drained primarily by the San Joaquin River.