10725 HOLLY DR 2016-01-01 MF Import

Dominant species widi indicator category of FAC or weltcr are compared with the number of total dominant plants.A ratio>50%occurzence of dominant hydruphytic vegetation qualifies a plot as having the necessary hydrophytic vecetation. This fommla Cor determining dominance of the wetland species is as follows: Dominant Hvdronhvtic Plants Y. ]00 Total llominant Plants Soils A hydric soil is formed undcr conditions of saturation, flooding, or ponding long cnough during the growing season to develop anaerobic conditions in the upper pari. Soils are routinely classified as tn their taxonanic fcatures, including those of hyd 'c origins, ,md are also compiled in rec ords of the Natural Resowce Conservation Serv�ce (USDA 1995). These soil records ac�d descriptions are reviewed as primary evidence of the presence of hydric soils.However,the confirmalion hydric soil indicators aze detern:ined by the use of field observations,some of which are detailed below: L High Organic Matter. Slowly decomposing conditions where oxygen is gives rise to organic layers. A. Organic soils(Histisols). When more than 50%of the upper 32 inches of soil is composed or organic matter or any thickness of organic material resting on bedrock. B. Histic epipedons. Gencrally un 8 to 16 inch layer at or near tUe surface of a mineral soil that contains a minimum of 20%organic matter. 2. Presence of Sulfidic MateriaL This indicator is verified by the unmistakable "rotten egb' odor indicating the presence of hydrogen sulfide,produced in oxygen reduced or anaerobic conditions. 3. Soil color indicating oxygen depleted conditions. A. Gleyed soils. A soil condition resulting from prolonged soil saturation, which is manifested by the presence of bluish or greenish colors through the soil mass or in motUes(spots or streaks)among other colors.Gleying occurs under reducing soil conditions resulting from soil sattuation, by wl:ich iron is reduced predominantly to the ferrous state. B. Redoximorphic features. Refers to the variable colored mottles interspersed within the dominant color in a soil layer,usually resulting from periodic reducing soil conditions. C. Low chroma matrix. Soil colors are described by a number indicating their hue,value/, and chroma respectively(lor example, lOYR 3/2). A chroma of 2 or Icss is considered a"low chroma" in mottled soils,and a chroma of 1 or less is considered a"low chroma" in unmotUed soils, when either type is observed in nongleyed soils. Mineral soils that are saturated for substmllial periods, but not long enough lo exhibit gleying, will often cxhibit a low chroma matrix. 5 .,. _ . ,. -... _ ._-. . -.g ,,:- �.