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k" KLEtNFELDER 2 SITE SETTING 2.1. SITE LOCATION The proposed Mariposa Lakes Development is a 3,810-acre project located in San Joaquin County east of State Route 99 and south of State Route 4 (Farmington Road) on the eastern border of the City of Stockton. Kaiser Road and Mariposa Road border the development on the east and south, respectively (Plate 1). 2.2. CURRENT USE AND SITE CHARACTERISTICS The site is currently utilized for primarily agricultural, rural residential, and light industrial activities. Individual property owners grow a variety of row crops and orchard. Water is supplied for agricultural purpose through a number of water wells and surface water deliveries. The primary source• f lo water has from se eral on site wells. Someurfacewater�lhaslbelen obtained from aDuckter, btained Creek by at least one local farmer. The Austin Road Landfill is located on the southeastern side of the South Stockton area, approximately 5,250 feet south of the Mariposa Lakes Development site. Volatile organic compounds (VOCs) were detected in groundwater beneath and north of the Landfill. In 1994, groundwater treatment was initiated to remove the VOCs. As of 2004, VOCs had not been detected in City wells and the VOC plume extended approximately 2,500 feet northeast of the Landfill (approximately 2,750 feet south of the proposed development site). A variety of land use types are planned for the Mariposa Lakes Development, including residential, educational, parks and recreation, commercial, and industrial. The development will contain 14 man-made lakes, two renaturalized creeks, stormwater detention ponds, an area dedicated to Delta College, and an Amtrak Station. The water features will be used for storm water management, recreation, irrigation, and possibly groundwater recharge. • Page 4 of 20 63138.H01/ST06R312/JDZ:ly April 7, 2006 ©2006 Kleinfelder, Inc.