Wetland Delineation Report-2013 - Laserfiche WebLink

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�acobson Environmental, PLLC www.jacobsonenvironmental.com Environmental Consultants Wayne]acobson, P.S.S.,W.D.C., P.W.S.,A.F.S. ------------------------------------------------------------------------------------------------------------ 5821 Humboldt Avenue North, Brooklyn Center, MN 55430 (612)802-6619 Cell Email: jacobsonenv@msn.com To clarify on some Hennepin County sites, 1. Many of these soils have black or gray parent materials 2. Many of the soiis have a high organic matter content 3. The hydric soil margin is typically higher than the wetland boundary margin on the site 4. Not all of the obviously wetter soils will be identified by the indicators 5. Many of the hydric soils are Mollisols which are classic problem hydric soils in many cases Field Indicators of Hvdric Soils A1 Histosol. Classifies as a Histosol (except Folist) or as a Histel (except Folistel). User Notes: In a Histosol, typically 16 inches or more of the upper 32 inches is organic soil material. Organic soil materials have organic-carbon contents by weight of 12 to 18 percent or more, depending on the clay content of the soil. These materials include muck(sapric soil material), mucky peat(hemic soil material), and peat(fibric soil material). A2 Histic Epipedon. A histic epipedon underlain by mineral soil material with chroma 2 or less. User Notes: Most histic epipedons are surface horizons 8 inches or more thick of organic soil material. Aquic conditions or artifical drainage is required. A3 Black Histic. A layer of peat, mucky peat, or muck 8 inches or more thick that starts within the upper 6 inches of the soil surface; has hue of 10YR or yellower, value of 3 or less, and chroma of 1 or less; and is underlain by mineral soil material with chroma of 2 or less. User Notes: Unlike indicator A2, this indicator does not require proof of aquic conditions or artifical drainage. A4 Hydrogen Sulfide. A Hydrogen sulfide odor within 12 inches of the soil surface. A5 Strati�ed Layers. Several stratified layers starting within the upper 6 inches of the soil surface. At least one of the layers has value of 3 or less and chroma of 1 or less, or it is muck, mucky peat, or a mucky modified mineral texture. The remaining layers have chroma of 2 or less. For any sandy material that constitutes the layer with value of 3 or less and chroma of 1 or less, at least 70 percent of the visible soil particles must be masked with organic soil material, viewed through a 10x or 15x hand lens. Observed without a hand lens, the particles appear to be close to 100 percent masked. User Notes: Use of this indicator may require assistance from a trained soil scientist with local experience. The minimum organic carbon content of at least one layer of this indicator is slightly less than is required for indicator A7. An undisturbed sample must be observed. Individual strata are dominantly less than 1 inch thick. A hand lens is an excellent tool to aid in the identification of this indicator. Many alluvial soils have stratified layers at greater depths; these soils do not meet the requirements of this indicator. Many alluvial soils have stratified layers at the required depths but do not have chroma of 2 or less; these do not meet the requirements of this indicator. The stratified layers occur in any soil texture. Wetland Delineation-Mitigation-Permitting-Monitoring-Banking-Functional Analysis-T &E Surveys 4 Phase I Environmental Assessments-EAW's-Soil ID-Soil Analysis & Delineation-Environmental Referrals Pond &Lake Weed Control & Fish Stocking-Tree Surveys-Natural Resource Management Plans