Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingSoilProfileExtensions.cs
===================================================================
diff -u -r81fa8a9bf3bd503cbd280e88b8f6037a840cff12 -r5906f61fff270a7526253bea07dfecdf680898ed
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingSoilProfileExtensions.cs	(.../PipingSoilProfileExtensions.cs)	(revision 81fa8a9bf3bd503cbd280e88b8f6037a840cff12)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingSoilProfileExtensions.cs	(.../PipingSoilProfileExtensions.cs)	(revision 5906f61fff270a7526253bea07dfecdf680898ed)
@@ -38,6 +38,10 @@
         /// <param name="soilProfile">The soil profile containing <see cref="PipingSoilLayer"/> 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 either <paramref name="soilProfile"/> or
+        /// the collection of consecutive aquifer layer(s) 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 PipingSoilProfile soilProfile, double level)
         {
             return TotalThicknessOfConsecutiveLayersBelowLevel(
@@ -100,10 +104,6 @@
         /// <param name="layers">Collection of consecutive <see cref="PipingSoilLayer"/>, ordered by 
         /// <see cref="PipingSoilLayer.Top"/> which are part of <paramref name="soilProfile"/>.</param>
         /// <returns>The total thickness of the consecutive layers below the given <paramref name="level"/>.</returns>
-        /// <exception cref="ArgumentNullException">Thrown when either <paramref name="soilProfile"/> or
-        /// <paramref name="layers"/> is <c>null</c>.</exception>
-        /// <exception cref="ArgumentException">Thrown when the bottommost <see cref="PipingSoilLayer"/> is not part of
-        /// <paramref name="soilProfile"/>.</exception>
         private static double TotalThicknessOfConsecutiveLayersBelowLevel(PipingSoilProfile soilProfile, double level, PipingSoilLayer[] layers)
         {
             if (soilProfile == null)