Section 15.103 - Soil Profile(1) The Soil Evaluator shall prepare a soil log using a form approved by the Department, in accordance with the Department's most recent manual for Soil Evaluators.(2) The following characteristics of each recognizable soil horizon or substratum in the deep observation hole testing shall be determined and recorded on the form: (a) depth and thickness of horizon;(b) estimated soil textural class, using the USDA/NRCS system of classification;(c) estimated volume percentage of coarse fragments;(d) abundance, size and contrast of redoximorphic features, if present;(e) soil structure (soil profile pits only); and(3) High ground-water elevation shall be determined by:(a) soil color using the Munsell system, the abundance, size and contrast of redoximorphic features, if present;(b) one or more of the following methods may be used to supplement the method in 310 CMR 15.103(3)(a) and shall be used when no redoximorphic features are present: 1. observation of actual water table during times of annual high water table;2. the use of USGS wells for correlating comparisons in water tables during times when the water table is not at the annual high range;3. a Department-approved method for determining inland high ground-water elevation as contained in Frimpter, M.H. "Probable High Groundwater Levels in Massachusetts," Open File Report 80-1205, USGS or Frimpter, M.H. and G.C. Belfit, 1992, "Estimating highest ground-water levels for construction and land use planning, Cape Cod, Massachusetts," updated, Barnstable, MA Cape Cod Commission Technical Bulletin 92-001"; or4. a Department-approved method for determining coastal high groundwater elevation which incorporates tidal fluctuation information into the use of historical high groundwater data as contained in Frimpter, M.H. and G.C. Belfit, 1992, "Estimating highest ground-water levels for construction and land use planning, Cape Cod, Massachusetts," updated, Barnstable, MA, Cape Cod Commission Technical Bulletin 92-001 or, if the location of the system is affected by tidal cycle typically within 300 feet of mean high water of the ocean, monitoring the high groundwater elevation over a tidal cycle during a full moon high tide.(4) The Soil Evaluator shall indicate on the soil log whether four feet of naturally occurring pervious materials exist in all areas observed throughout the area proposed for the soil absorption system.