Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsSoilProfileExtensions.cs
===================================================================
diff -u -r650fc7b43cb6729baee51d079f0377df8d7a3de9 -re1dd0f93e3e7051332396cad1db21a0c88d5df64
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsSoilProfileExtensions.cs	(.../MacroStabilityInwardsSoilProfileExtensions.cs)	(revision 650fc7b43cb6729baee51d079f0377df8d7a3de9)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsSoilProfileExtensions.cs	(.../MacroStabilityInwardsSoilProfileExtensions.cs)	(revision e1dd0f93e3e7051332396cad1db21a0c88d5df64)
@@ -38,6 +38,9 @@
         /// <param name="soilProfile">The soil profile containing <see cref="MacroStabilityInwardsSoilLayer"/> to consider.</param>
         /// <param name="level">The level under which the aquifer layers are sought.</param>
         /// <returns>The thickness of the part of the consecutive aquifer layer(s) (partly) under the <paramref name="level"/>.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="soilProfile"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when the bottommost <see cref= "MacroStabilityInwardsSoilLayer" /> is not part of
+        /// <paramref name="soilProfile"/>.</exception>
         public static double GetTopmostConsecutiveAquiferLayerThicknessBelowLevel(this MacroStabilityInwardsSoilProfile soilProfile, double level)
         {
             return TotalThicknessOfConsecutiveLayersBelowLevel(
@@ -53,6 +56,9 @@
         /// <param name="soilProfile">The soil profile containing <see cref="MacroStabilityInwardsSoilLayer"/> to consider.</param>
         /// <param name="level">The level under which the coverage layers are sought.</param>
         /// <returns>The thickness of the part of the consecutive coverage layer(s) (partly) under the <paramref name="level"/>.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="soilProfile"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when the bottommost<see cref= "MacroStabilityInwardsSoilLayer" /> is not part of
+        /// <paramref name="soilProfile"/>.</exception>
         public static double GetConsecutiveCoverageLayerThicknessBelowLevel(this MacroStabilityInwardsSoilProfile soilProfile, double level)
         {
             return TotalThicknessOfConsecutiveLayersBelowLevel(