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Environmentai Consultants ' <br /> Wayne]acobson, P.S.S.,W.D,�,, p.W,S.,A.F.S. ' <br /> ------------------ --------------- <br /> ----------------- ---------------------- <br /> 582! Humboldt pvenue North, 8rooklyn Center, MN 55430 (612)802-6619 Cell ' <br /> Email: jacobsonenv@msn.com ' <br /> A10 0.75 inch Muck. A layer of sapric muck 0.75 inch or more thick with vafue 3 or less and chroma <br /> 1 or less, starting within 6 inches of the soil surface. <br /> User Notes: this indicator requires a minimum muck thickness of Q.75 inch. Normally, fhis expression of ' <br /> anaerobiosis is at the soil surface; however, it may occur at any depth within 6 inches. Muck is sapric soil <br /> material with a minimum content of organic carbon that ranges from 12 to 18 percent, depending on the ' <br /> content of clay, Organic soil materiaf is called muck if virtually all of the material has undergone sufficient <br /> decomposition to limit the recognition of the plant parts. Hemic and Fibric soil material do not qualify. <br /> Generally, the sapric muck is black and has a"greasy"feel; sand grains should not be evident. <br /> A11 Depleted below dark surface. A layer with a depleted or gleyed matrix that has 80 percent or <br /> more chroma of 2 or less, siarting wifhin 12 inches of the soi! surface, and having a minimum thickness of <br /> either: <br /> a. 6 inches or <br /> b. 2 inches(if the 2 inches consists of fragmental soil material) <br /> c. Common in Mollisols—on this wetland site, could be Glencoe or Webster <br /> Loamy or clayey layer(s)above the depleted or gleyed matrix must have value of 3 or fess and chroma of <br /> 2 or less. Any sandy material above the depleted or gleyed matrix musf have value of 3 or less and ' <br /> chroma of'1 or less, and, viewed through a 1Qx or 15x hand lens, at least 70 percenf of the visible soil ' <br /> particles must be masked with organic material. Observed without a hand lens, the particles appear to be <br /> close to 100 percent masked. <br /> i <br /> User Notes: This indicator often occurs in Mollisols but also applies to soils with umbric epipedons and <br /> dark colored ochric epipedons. For soils with dark colored epipedons more than 12 inches thick, use I <br /> indicator Al2. A depleted matrix requires value of 4 or more and chroma of 2 or less. Redax ' <br /> concentrations, including soft iron-manganese masses and/or pore linings,are required in soils with <br /> matrix colors of 4/1, 4/2, or 5/2, A, E,and calcic horizons may have iow chromas and high values and <br /> may therefore be mistaken for a de leted matrix� how <br /> A , ever the ar <br /> y e excluded from#he conce t of <br /> e p <br /> d leted matrix <br /> p unless the soi! has corr�mon or many disfinct or prominent redox concentrations occurring <br /> as soft masses or pore finings. • <br /> Al2 Thick Dark Surface. A layer at least 6 inches thick with a depleted or gleyed matrix that has 60 <br /> percent or more chroma 2 or less starting below 12 inches of the surface. The layer above the depleted <br /> or gleyed matrix must have value of 2.5 or less and chroma of 1 or less to a depth of at least 12 inches <br /> and value of 3 or less and chroma of 1 or less in any remaining layers above the depleted or gleyed <br /> matrix. In any sandy material above the depleted or gleyed matrix, at least 70 percent of the visible soil <br /> particles must be masked with organic materiai, viewed through a 10x or 15x hand lens. �bserved <br /> without a hand lens, the particles appear to be close to 100 percent masked. <br /> User Notes: This indicator applies to soils that have a black layer 12 inches or more thick and have value <br /> of 3 or less and chroma of 1 or less in any remaining layers directly above a depleted or gleyed matrix. <br /> This indicator is mosi often associaied with overthickened soils in concave landscape positions. A <br /> depleted matrix requires value of 4 or more and chroma of 2 or less. Redox concentrations, including soft <br /> iron-manganese masses and/or pore linings, are required in soils with matrix colors of 4/1, 4/2 or 5/2. A, <br /> E, and calcic horizons may have low chromas and high values and may therefore be mistaken for a <br /> depleted matrix; however, they are excluded from the concept of depieted matrix unless the soil has <br /> common or many distinct or praminent redox concentrations occurring as soft masses or pore linings. ' <br /> Wetland Delineatfon-Mitigation-Permitting-Monitoring-Banking-Functional Analysis-7& E Surveys 5 ' <br /> Phase I Environmenkal Assessments-EAW's-Soil ID-Soil Analysis & Delineation-Environmental Referrals <br /> Pond &Lake Weed Control &Fish Stocking-Tree Surveys-Natural Resource Management plans ' <br /> i <br />