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Kennedy/Jenks Consultants slight. Most areas of this unit are used for irrigated crops, orchards, or vineyards and are ` suited to irrigated row, field, orchard, and vineyard crops. The main limitation for irrigation is the low available water capacity. The high percentage of sand in the soil reduces the amount of moisture available for plant growth. Because the soil is droughty, applications of the water to irrigated fields should be light and frequent. The soil may also result in soil blowing if wind velocity is high and the soil is overtilled and dry. The main limitation for soil use in onsite sewage systems is the rapid permeability in the substratum. The rapid permeability may result in impacts to underground water supplies. • Honcut Sandy Loam—The soil is very deep, well drained, and nearly level on alluvial fans. It is formed in alluvium derived from granitic rock sources. Typically, the surface layer is brown sandy loam about 21 inches thick. The underlying material to a depth of 60 inches is brown and yellowish brown sandy loam. In some areas, the surface layer is fine sandy loam, coarse sandy loam, or gravelly sandy loam. Permeability is moderately 4 rapid and the available water capacity is moderate. Runoff is slow and the hazard of water erosion is slight. The rate of water intake in irrigated areas is 1.5 inches per hour. The soil is used for irrigated corps, orchards, and vineyards and is well suited to . irrigated, row, field, orchard, and vineyard crops. Furrow, border, and sprinkler irrigation systems are suitable. The main limitation for irrigation use is the potential for soil blowing if wind velocity is high and the soil is overtilled and dry. It is suitable for use in onsite sewage treatment systems as there are few limitations or concerns regarding groundwater impacts. ` • Veritas Fine Sandy Loam—The soil is moderately well drained, nearly level on low fan terraces, and is deep to a hardpan. It formed in alluvium derived from mixed rock sources. Typically, the surface layer is grayish brown fine sandy loam about 15 inches thick. The subsoil is pale brown and light brownish gray fine sandy loam about 39 inches thick. The lower part to a depth of 70 inches is a variegated light gray and white, weakly cemented to strongly cemented hardpan. In some areas the surface layer is sandy loam or loam. Depth to the hardpan is as little as 30 inches in a few areas, mainly where deep leveling cuts have been made. Permeability is moderately rapid and the available water capacity is moderate. Depth to the water table is more than 6 feet, but water may be briefly perched above the hardpan after periods of heavy rainfall or irrigation. Runoff is slow and the hazard of water erosion is slight. The rate of water intake is 1.5 inches per hour. The soil is subject to rare flooding, which occurs during years of abnormally high precipitation. Most areas are used for irrigated crops, orchards, or vineyards. A few areas are used as irrigated pasture. The unit is suited for irrigated row, field, orchard, and vineyard crops. The main limitation is the depth to hardpan,which limits the effective rooting depth. Where feasible, deep ripping of the restrictive hardpan can help to ` overcome this limitation. Careful applications of irrigation water are needed to prevent the buildup of a high water table. Furrow, border, and sprinkler irrigation systems are suitable. Leveling helps to ensure uniform application of water. Soil blowing may also result if wind velocity is high and the soil is overtilled and dry. If used for onsite sewage ` systems, the main limitation is depth to hardpan. The rare flooding is also a hazard. Ripping the hardpan improves permeability and suitability of the soil for septic tank absorption fields. Groundwater Protection Work Plan, The Wine Group Page 1-5 Franzia Winery, Ripon, Calitomia .)_�Mm ::.+Ck9.2PUutwul�lansixu%L•Kdx