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drawing, included as Figure 3-1, presents zoning designations and land uses for Forward Landfill and the surrounding areas. Adjacent land uses include agricultural lands to the east, west, and south. A criminal detention and correctional facilities are located approximately 1,900 feet north of Forward and approximately 300 feet north of the northern property boundary. The Burlington Northern and Santa Fe Intermodal Facility, a 470-acre train/truck cargo transfer and storage facility, is located approximately one mile northeast of the site, along the Burlington Northern and Santa Fe railroad main line. The Stockton Municipal Airport is located approximately one mile west of the site. The airport's turbojet runway, I IL-29R, is located within 10,000 feet of Forward. Three residences are located near the site. The unoccupied residence at 9690 Austin Road is leased by Forward. It is located approximately 500 feet from the landfill and is across Austin Road from the entrance facility area. Two residences are located on Lynch Road, approximately 0.5 miles southeast of the site. 3.3 Hydrology and Water Quality REGIONAL Forward is located in the San Joaquin hydrologic basin. Aquifer materials within the basin consist predominantly of sand mixed with clay and silt layers. Before the early 1960's, groundwater in the area typically flowed to the west. Since that time, heavy pumping in the Stockton area caused a northerly component of flow to develop. Salt water intrusion from the west has resulted in a shift in pumping from west Stockton to east of Stockton, and a resulting modification in groundwater flow to the northeast. Based on groundwater elevation contours published by the San Joaquin County Flood Control and Water Conservation District, the regional groundwater in the vicinity of the site is now typically 15 to 30 feet below mean sea level (approximately 55 to 80 feet below ground surface) and flows to the north-northeast. LOCAL The project area is underlain by sediments of the Victor formation, which consists of over 100 feet of clay, silt, and fine to coarse sand. Groundwater within the Victor formation is generally unconfined. In addition, perched water of limited extent has also been encountered with the Victor Formation. Near Forward Landfill, groundwater levels have dropped more than 50 feet from levels measured in the 1940s and 1950s due to agricultural pumping demand, population growth and drought (Geologic Associates, 2007). Recent data indicate that groundwater elevations have been relatively static, fluctuating most significantly following infrequent above average rainy seasons as occurred following the 1972/1973, 1982/1983 and 1997/1998 winters. The groundwater level also fluctuates seasonally by approximately 5 to 10 feet due to a distinct rainy season and dry C Documents and Set ingsyessimsees\Desktoff or d LFGTE-Project Desciption.doc CORNERSTONE 3-2 LEWIS ENGINEERING Easlru®m. J G—P,LLC