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14 October 2015 AGE Project No. 15-3556 Page 4 of 14 A review of historical aerial photographs did not reveal any items of environmental concern in connection with the subject property with the exception of the long term agricultural use. 3.3. Historical Topographic Maps AGE reviewed historical topographic maps of the subject property and surrounding area that were supplied by EDR for the years 1913, 1952, 1968, 1978, and 1994. The following is a summary of our review of the topographic maps: Year(s) Historical Topographic Map Summary 1913 The subject property and all adjacent and surrounding areas are mapped as undeveloped land. 1952, 1968, The subject property is mapped as undeveloped land. Highway 4 is mapped in 1978, 1994 its current location to the immediate north. An unnamed creek is mapped bordering the property to the west. All adjacent properties are mapped as undeveloped. A creek is also mapped to the immediate east. A review of historical topographic maps did not reveal any items of environmental concern in connection with the subject property. 3.4. Street Directories AGE requested that EDR provide a review of city and street directories to determine the occupancy history of the property for five year intervals between 1906 and 2013. No directly listings were found for the subject property address. 3.5. Building Department and Assessor's AGE attempted to review San Joaquin County Building Department permits for the subject property address. No permits were available for review. 3.6. PHYSICAL SETTING SOURCES Geology The subject property is situated within the Great Valley Geomorphic Province of California, an elongate, northwest trending alluvial plain running 400 miles through Central California. The Great Valley is a structural trough that is bound to the north by the Klamath Mountains, the south by the Tehachapi Mountains, the east by the Sierra Nevada Mountain Range, and the west by the Coast Ranges. Approximately 32,000 feet of marine and continental sediments have been deposited within the Great Valley almost continuously since the Jurassic. Northern and southern regions of the Great Valley have Advanced GeoEnvironmental,Inc.