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Updated Soil Suitability/Nitrate Loading Study VAN RUITEN WINERY EXPANSION 340 West Highway 12,Lodi, California San Joaquin County Use Permit No. PA-0800350 1.0. INTRODUCTION AND PROPOSED DEVELOPMENT On behalf of Mr. Bob Smith of Parkland Construction,Advanced GeoEnvironmental, Inc. (AGE) has prepared the enclosed Updated Soil Suitabili4vNitrate Loading Study for the property located at 340 West Highway 12,Lodi,California(site).The purpose of this study is to determine if the area of proposed expansion is suitable for septic system usage. As required by San Joaquin County Environmental Health Department (SJCEHD) letter dated 17 December 2008 (Appendix A), this { study was prepared as an update to the Soil Suitability/Nitrate Loading Study prepared by Neil O. Anderson and Associates (NOA) dated 19 November 1999. This updated study includes a description of the site, proposed development of the site, sampling and analysis of the on-site domestic well,performance of a soil percolation test within a 100-foot radius of the proposed septic system and a nitrate loading analysis. 1.1. DESCRIPTION OF SITE The location of the site, surrounding properties and general setting is illustrated on the Lodi South topographic map, 1976(7.5 Minute United States Geological Survey(USGS) Topographic Series, California)in the northeastern quarter of Section 16,Township 3 North,Range 6 East,Mount Diablo Base and Meridian(Figure 1). The map shows the site located at an elevation of approximately 28 feet above mean sea level in an area of low topographic relief. The regional slope of the area is relatively gentle and dips toward the west. The site is situated on the south side of West State Route 12,approximately 3,800 feet west of Lower Sacramento Road and west of the City of Lodi. The site consists of a 81.87-acre parcel identified as San Joaquin County Assessor Parcel Number(APN)058-020-05.The current zoning ofthe property is AG-40, which is established to preserve agricultural lands for the continuation of commercial agriculture enterprises. j The Van Ruiten Family Winery and Tasting Room are located on the northwestern corner of the parcel. The current winery complex occupies approximately 1.5 acres and is comprised of the following(from north to south): • A storm water retention pond to the north followed by a large oak tree and parking area.The site domestic well is located off of the southwest corner of the storm water pond; An approximately 1,200-square foot tasting room bound by landscaped areas to the immediate west and east.The western landscaped area contains the site's current septic tank and reportedly contains the leach area; Advameed GeoEnvirommentat,Inc.