Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Sensors/SensorPLLineCreatorTest.cs
===================================================================
diff -u -r6128 -r6147
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Sensors/SensorPLLineCreatorTest.cs	(.../SensorPLLineCreatorTest.cs)	(revision 6128)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Sensors/SensorPLLineCreatorTest.cs	(.../SensorPLLineCreatorTest.cs)	(revision 6147)
@@ -390,24 +390,27 @@
         // asserts
         PlLinePoint lastPoint = actual.Points.Last();
         Assert.That(actual.Points, Has.Count.EqualTo(9));
-        Assert.That(actual.Points[0].X, Is.EqualTo(0));
-        Assert.That(actual.Points[0].Z, Is.EqualTo(5));
-        Assert.That(actual.Points[1].X, Is.EqualTo(71.875));
-        Assert.That(actual.Points[1].Z, Is.EqualTo(5));
-        Assert.That(actual.Points[2].X, Is.EqualTo(85));
-        Assert.That(actual.Points[2].Z, Is.EqualTo(4.5));
-        Assert.That(actual.Points[3].X, Is.EqualTo(90));
-        Assert.That(actual.Points[3].Z, Is.EqualTo(sensor2Value));
-        Assert.That(actual.Points[4].X, Is.EqualTo(95));
-        Assert.That(actual.Points[4].Z, Is.EqualTo(3.5));
-        Assert.That(actual.Points[5].X, Is.EqualTo(104));
-        Assert.That(actual.Points[5].Z, Is.EqualTo(sensor3Value));
-        Assert.That(actual.Points[6].X, Is.EqualTo(108));
-        Assert.That(actual.Points[6].Z, Is.EqualTo(3.9));
-        Assert.That(actual.Points[7].X, Is.EqualTo(123.3));
-        Assert.That(actual.Points[7].Z, Is.EqualTo(sensor4Value));
-        Assert.That(actual.Points[8].X, Is.EqualTo(190));
-        Assert.That(actual.Points[8].Z, Is.EqualTo(sensor4Value));
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Points[0].X, Is.EqualTo(0));
+            Assert.That(actual.Points[0].Z, Is.EqualTo(5));
+            Assert.That(actual.Points[1].X, Is.EqualTo(71.875));
+            Assert.That(actual.Points[1].Z, Is.EqualTo(5));
+            Assert.That(actual.Points[2].X, Is.EqualTo(85));
+            Assert.That(actual.Points[2].Z, Is.EqualTo(4.5));
+            Assert.That(actual.Points[3].X, Is.EqualTo(90));
+            Assert.That(actual.Points[3].Z, Is.EqualTo(sensor2Value));
+            Assert.That(actual.Points[4].X, Is.EqualTo(95));
+            Assert.That(actual.Points[4].Z, Is.EqualTo(3.5));
+            Assert.That(actual.Points[5].X, Is.EqualTo(104));
+            Assert.That(actual.Points[5].Z, Is.EqualTo(sensor3Value));
+            Assert.That(actual.Points[6].X, Is.EqualTo(108));
+            Assert.That(actual.Points[6].Z, Is.EqualTo(3.9));
+            Assert.That(actual.Points[7].X, Is.EqualTo(123.3));
+            Assert.That(actual.Points[7].Z, Is.EqualTo(sensor4Value));
+            Assert.That(actual.Points[8].X, Is.EqualTo(190));
+            Assert.That(actual.Points[8].Z, Is.EqualTo(sensor4Value));
+        });
     }
 
     [Test]
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapper.cs
===================================================================
diff -u -r6136 -r6147
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapper.cs	(.../WtiPipingBlighKernelWrapper.cs)	(revision 6136)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiPipingBligh/WtiPipingBlighKernelWrapper.cs	(.../WtiPipingBlighKernelWrapper.cs)	(revision 6147)
@@ -49,6 +49,7 @@
 {
     private const double defaultFluidisationGradient = 0.3;
     private const double defaultMaxReturnValue = 90.0;
+    private const double d50DividedByD70 = 0.81;
 
     /// <summary>
     /// Create the kernel input.
@@ -237,7 +238,7 @@
     /// <param name="designAdvise">The design advise.</param>
     /// <param name="evaluationMessage">The evaluation message.</param>
     /// <returns>
-    /// if the design was succesful
+    /// if the design was successful
     /// </returns>
     /// <exception cref="System.NotImplementedException"></exception>
     public bool EvaluateDesign(DamKernelInput damKernelInput, IKernelDataInput kernelDataInput, IKernelDataOutput kernelDataOutput,
@@ -371,29 +372,29 @@
             Rc = wtiPipingBlighInput.Rc,
             DTotal = wtiPipingBlighInput.DTotal,
             SeepageLength = wtiPipingBlighInput.SeepageLength,
-            D50 = 0.81 * wtiPipingBlighInput.D70,
+            D50 = d50DividedByD70 * wtiPipingBlighInput.D70,
             ModelFactorPiping = 1
         };
         return calculator;
     }
 
-    private void ThrowWhenKernelInputNull(WtiPipingBlighInput wtiPipingBlighInput)
+    private static void ThrowWhenKernelInputNull(WtiPipingBlighInput wtiPipingBlighInput)
     {
         if (wtiPipingBlighInput == null)
         {
             throw new NoNullAllowedException(Resources.WtiPipingBlighKernelWrapper_NoInputObjectDefinedForBligh);
         }
     }
 
-    private void ThrowWhenKernelOutputNull(WtiPipingBlighOutput wtiPipingBlighOutput)
+    private static void ThrowWhenKernelOutputNull(WtiPipingBlighOutput wtiPipingBlighOutput)
     {
         if (wtiPipingBlighOutput == null)
         {
             throw new NoNullAllowedException(Resources.WtiPipingBlighKernelWrapper_NoOutputObjectDefinedForBligh);
         }
     }
 
-    private void ThrowWhenDamKernelInputNull(DamKernelInput damKernelInput)
+    private static void ThrowWhenDamKernelInputNull(DamKernelInput damKernelInput)
     {
         if (damKernelInput == null)
         {