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2015. San Joaquin County (Calif.). Community Development Department and United States. Natural Resources Conservation Service. This polygon shapefile contains information about expansive soil areas in San Joaquin County, California. Expansive soils are those that are prone ... San Joaquin County (Calif.). Community Development Department.
2004. Tehama County Public Works and United States. Natural Resources Conservation Service. This polygon shapefile contains data derived from the Soil Survey Geographic Database (SSURGO) to show the area of Tehama County, California. SSURG... Tehama County Public Works.