IRSS Resources
		Soil and Landscape Evaulation Manual, AY-323
		The Board of Registration for Soil Science encourages Registered Soil Scientists to use this manual in preparing reports and encourages environmental health officers to ask that this manual be followed for the reports they receive. It is the basis for evaluations done for CEUf credits, and will be a reference for the Soils of Indiana and Field Skills exam.
		Soil and Landscape Evaluation Report for Onsite Sewage Disposal Systems
			Click here for a PDF version of the Evaluation Report This form is currently only available for viewing on-screen, please print to fill out by hand or by typewriter.
			Click here for a DOC (Word) version of the Evaluation Report
		DSat8 and Seasonal High Water Tables in Indiana Soils
			Click here for PDF version of this document DSat8 is the depth to which the soil water table "usually rises." More technically, it is the depth below which a soil is saturated more than 8% of the time. Depth to reduction depletions (DRD) is the depth to certain gray colors in the soil. For most soils, DSat8 and DRD are at about the same depth, but for other soils DSat8 is higher in the soil than DRD. Soil scientists are encouraged to report both DRD and DSat8 on evaluation reports for onsite sewage disposal systems. It gives them the opportunity to report that a certain soil is probably wetter than indicated by gray colors. It provides regulators, system designers, and installers a clue that perhaps a system will work better if interceptor drains and surface diversions are installed upslope of the proposed soil absorption field or that perimeter drains. This paper expands, and slight revises, the discussion on pages 49 to 52 of AY-323.
		Reference Soil Texture Samples
			You may purchase soil samples to help calibrate your evaluation of soil texture. Soil analysis information and ordering instructions are on the website: http://www.agry.purdue.edu/agryclub/soilsamples/.
		Texture Estimate Calculator
			Click here to download an Excel Spreadsheet which can be used to calculate the score of estimated textures compared to laboratory data.