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Soil Suitability&Nitrate Loading Study Page 6 Proposed M2 Winery,2900 Peltier Rd,Acampo CA j Project No. 6701A A May 28,2013 5.0 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 t of mineral grains such as quartz, feldspars, hornblende, and volcanic rock fragments. Clays are most commonly 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. . i According to the 1992 report, Soil Survey of San Joaquin County, California, prepared by the U.S. Agriculture Department, Soil Conservation Service,:the soil on the site is part of the Cl ,, Tokay-Acampo association: "Moderately well drained and hell drained moderately course- textured soils that are moderately deep to a cemented hardpan or are very deep; on low fan terraces". The specific on-site soil is characterized as Tokay fine, sandy-loam, 0 to. 2% CS �:> slopes. This is very deep, well drained. nearly level soil on'low fan terraces. ,To depths of about 19 inches, it is grayish brown fine sandy loam. The subsoil is grayish brown and pale brown fine sandy loam to about 26 inched.. From 26 to 60 inches,'is pale brown fine sandy loam. North American Technical Service (HATS) completed a geotechnical study of the on site soils (HATS, 2013)to determine if the soil is suitable for the proposed building construction (Appendix Q. As a part of the study, a,15.5-foot-deep (P-2) and a 24-foot-deep (P-1) soil 'boring were advanced on the site.• The boring logs in the report generally confirm the observations of the soil survey described above. The material encountered is described as brown silty-sand from the surface to 5 feet. Similar material was found from 12 to 15.5 feet in the shallower boring(P-2) and 17 to 24 feet in the deeper boring (P-1). Tan sandy silt was e encountered between 4.5 and 7 feet and between;12 and 17:,feet in P-1 and.between 5 to 7 feet in P-2). Both borings encountered reddish brown silty sand from 7 to 1.2 feet. 5.2 Soils and Fluid Flow Characteristics 1i The soil observed on the site was generally similar to what is described in the soil survey (USDA, 1992). Based on the soil cuttings from the geo-technical test borings, the soils to a y depth of 25 feet are silty and are expected to exhibit only fair permeability through much of ' I the interval. tt � 2937 Veneman Ave.,913240 Gco-Phase Environem6nutal Inc. Phone: (209)569-0293 Modesto,CA 95356 Fax: (209)569-0295