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w 0 Environmental Site Assessment APN 137-31-10, 11, 12, 13, 14, 16,and 17 Page 4 2.2 PHYSICAL SETTING The Site is located in the Great Central Valley. The USGS snap shows that the terrain of the Site is level. The Site is south of highway 4 located in an area of retail, commercial, and industrial operations. Vegetation is confined to sparse grasses and weeds growing between broken pavement and unpaved areas. 2.3 GEOLOGY AND HYDROGEOLOGY The Site is located in the geological region known as the Great Valley. The soils of the Great Valley were formed in alluvium derived from mixed rock sources of the Coast Range and from granitic rock sources of the Sierra Nevada. The soils in the area of the Site are classified as "urban land" according to the Soil Survey of San Joaquin County, California. Geologic conditions at depth are relatively well known as a result of exploratory and production drilling for the nearby French Camp, Lathrop, and Stockton natural gas fields. The surface alluvium covering the Site is underlain by more than 3,000 feet of Pliocene and Miocene age non-marine sands and clays. These non-marine deposits unconformably overlie an estimated 9,000 to 10,000 feet of Cretaceous marine sands and shales (Hoffinan, 1997). The upper-Cretaceous sand units of the Great Valley - Sequence are the primary natural gas producing units. The Cretaceous deposits are underlain by basement rock belonging to the Franciscan Assemblage or the Sierra Nevada Granitics and Metamorphics. • 2.4 STRUCTURES, ROADS, AND OTHER IMPROVEMENTS ON THE SITE Condor assessors visited the Site in July 2000. Site observations are discussed in more detail in Section 4.0. 2.5 INFORMATION REPORTED BY USER REGARDING ENVIRONMENTAL LIENS An environmental lien is a charge, security, or encumbrance upon title to a property to secure the payment of a cost, damage, debt, obligation, or duty arising out of response actions, cleanup, or other remediation of hazardous substances or petroleum products upon a property. An Elks Lodge representative completed the questionnaire. The representative reported no knowledge of the property having an environmental lien. The completed questionnaire is contained within Appendix E. 2.6 CURRENT USES OF THE SITE The Site (APN) 137-31-10, ll, and 12 is currently occupied by a two story brick building in the southwest corner and a small lean-to shed behind the building in the southern portion of the parcel. A chain link fence surrounds the property. There are no visible depressions or mounds in the ground. There are no visible signs of pipes coming out of the ground or out of the building except for normal plumbing and heating vents. 2.7 PAST USES OF THE SITE In 1895 the Site was primarily composed of many small dwellings and corner stores. The dwellings consisted of wood-frame buildings including Japanese Tenement rooms. Beginning in 1917. the Site began to develop into businesses that were retail, commercial, and industrial in nature. Between 1917 and 1956 brick buildings began to replace wood frame buildings. LJ CONDOR