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Soil Snimbditt M Nitrate 1.oadin¢Ymdv Page Proposed Oak Farm Vine,mds E"rsinu,Lodi CA Pmject No 670 tC Imre 17,2013 i.0 SOIL PROFILE 5.1 Soil Profile Soils in this part of San Joaquin County generally consist of a mixture of clay. silt-and sand with some gravel This material is derived from the Sierran range, and clasts consist mostly of mineral grains such as quartz. feldspars. hornblende, and volcanic rock fragments. Clays are most conmmonly derived from the breakdown of(rock fragments, feldspar. and mica. The sediments are deposited by the action of rivers, in this case, primarily the Mokelumne. The surface and near surface deposits are generally referred to as the Mehrton Formation. According to the 1992 report, Soil Survey of San Joaquin County, California, prepared by the C S. Agriculture Department, Soil Conservation Service, the soil on the site is part of the Tokav-Acampo association `.1,1aderate1v hell drained and weltdrained mare rarelt courve- terntred suds that are nmkleraielr deep to a cemented hardpan or are Pere deep. (mlcnr for terraces". There are several specific on-site soil types. The area along the creek bed that forms the north boundary is known as Merritt silty clav loam, partially drained, 0 to 2% slopes. The area occupied by the eastern vineyard is Columbia fine sandy loam, partially drained, 0 - 24u slopes. The area occupied by the westem vineyard is Kingdom fine sande loam, 0 - 2% slopes. The area occupied by the present and proposed buildings as well as some of the vineyard is underlain by Tokav fine. sandy-loam, 0 to 2°o slopes. This is very deep, well drained nearly level soil on low fan terraces. To depths of about 19 inches. it is gravish brown fine sandy loam. The subsoil is grayish brown and pale brown tine sandy loam to about 26 inched. From 26 to 60 inches, soil is pale brown fine sandy loam North American Technical Service (NATS) completed a geotechnical study of the on site soils (HATS, 2013) to deternine if the soil is suitable for the proposed building construction (Appendix C) As a part of the study, a 24-foot-deep soli boring was advanced on the site through the footprint of the proposed new winery. The boring log in the report generally confirms the observations of the soil surrey described above. T'he material encountered is described as brown silty-sand from the surface to 5 feet_ The soil from 5 to 24 feet is tan sandy silt Q Soils and Fluid Floe Characteristics The soil observed on the ,iTc was gencrally similar to what is described in the soil surve.' (ti SDA. 1992). Based on the soil tunings from the percolation test borings, and the geo-tech borings, the soils to a depth of 24 feet are silty and are expected to exhibit fair permeability. 7937 Veneman A ve..I B2141 Geo Phm.e Eminmmenial lnc. F'Irmw. (209)A.9-021): Modeam,CA 95356 Fax: 1"R)i69-029