SU0005931_SSNL - Laserfiche WebLink

Home Browse Search

i ,r - San Joaquin County, California 21 17. Pentz-Pardee-Keyes development. The major soils are suited to the vegetation used for livestock grazing. The limitations Moderately well drained and well drained, moderately include a very low and low available water capacity and coarse textured and gravelly medium textured soils that a shallow rooting depth. Some areas of the Pentz and are shallow to sandstone, conglomerate, or a cemented Pardee soils are limited by the content of coarse hardpan; on hills and high terraces fragments in the surface layer. In a few-areas the This map unit is on hills and high terrace remnants in hazard of water erosion is severe. These areas should the eastern part of the county. The soils formed in be protected from overgrazing. material weathered from basic andesitic, tuffaceous Where this unit is used for homesite development, depth to bedrock. Onsite the main limitation is the de sandstone and conglomerate. p This unit makes up about 4 percent of the survey sewage disposal systems can fail because of the depth area. It is about 47 percent Pentz and similar soils, 26 to bedrock and because of the seepage of effluent at. percent Pardee and similar soils, 17 percent Keyes and points downslope. The depth to bedrock should be similar soils, and 10 percent components of minor considered when the disposal systems are designed. extent. The major components do not occur together in The main hazard is water erosion in the steeper areas. all of the delineations. Only the part of the site that is used for construction Pentz soils are on hills. They are shallow and well should be disturbed. drained. Slope ranges from 2 to 50 percent. Typically, the surface layer is moderately coarse textured. The 18. Redding-Yeilowlark subsoil is medium textured. It is underlain by Moderately well drained, gravelly medium textured soils moderately consolidated, basic andesitic sandstone at a that are moderately deep and deep to a cemented depth of 10 to 20 inches. The hazard of water erosion is hardpan; mainly on fan terraces and high terraces slight or moderate in most areas but ranges from slight to severe. This map unit is mainly on fan terraces and high Pardee soils are on hills and on high terrace terraces in the eastern part of the county. The soils remnants and dissected terraces. They are shallow and formed in gravelly alluvium derived from mixed rock well drained. Slope ranges from 0 to 15 percent. sources. Typically, the surface layer is gravelly and medium This unit makes up about 4 percent of the survey textured. The subsoil is very gravelly and moderately area. It is about 71 percent Redding and similar soils, fine textured. It is underlain by andesitic, tuffaceous 12 percent Yeliowlark and similar soils, and 17 percent conglomerate at a depth of 10 to 20 inches. The hazard components of minor extent. of water erosion is slight or moderate. Redding soils are on high terraces. They are 20 to 40 Keyes soils are on hills. They are 10 to 20 inches inches deep to a cemented hardpan. Slope ranges from deep to a cemented hardpan and are moderately well 0 to 30 percent. Typically, the surface layer is gravelly drained. Slope ranges from 2 to 15 percent. Typically, and medium textured. The subsoil is a fine textured the surface layer is gravelly and medium textured. The claypan in the upper part and a hardpan in the lower subsoil is a gravelly and fine textured claypan in the part. The shrink-swell potential is high in the subsoil. upper part and a hardpan in the lower part. The The hazard of water erosion is slight or moderate in hardpan is underlain by moderately consolidated, basic most areas but ranges from slight to severe. andesitic sandstone. The hazard of water erosion is Yeliowlark soils are on fan terraces. They are 45 to slight or moderate. 60 inches deep to a cemented hardpan. Slope ranges Minor in this unit are the Hicksville and Hallenbeck from 0 to 5 percent. Typically, the surface layer is soils, Lithic Xerorthents, and fits, gravel. Hicksville soils gravelly and medium textured. The upper part of the are very deep or deep, are occasionally flooded, and subsoil is gravelly and medium textured and gravelly are in dissected drainageways. Hollenbeck soils are and moderately fine textured. The next part is a gravelly very deep and are in the lower basins. Lithic and fine textured and moderately fine textured claypan. Xerorthents are very shallow and are in the same The lower part is a hardpan. The hazard of water landscape position as the Pentz soils. Pits are open erosion is slight or.moderate. excavations from which soil has been removed and in Minor in this unit are the Hicksville, Kaseberg, Keyes, which other material that supports few or no plants has Pentz, and Peters soils. Keyes and Peters soils are been exposed. shallow. They are at the base of the steeper slopes. Areas of this unit are used mainly for livestock Hicksville soils are occasionally flooded and are in grazing- A few areas are used for homesite dissected drainageways. Kaseberg soils are shallow f ��'� Cd 2-