Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneLocationCalculation.cs
===================================================================
diff -u -rc743d1f229ff553fff9a05964c1adac6e510df4a -ree62f9ef8c69cd574bd23077bf9079e3e8fbdd8c
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneLocationCalculation.cs	(.../DuneLocationCalculation.cs)	(revision c743d1f229ff553fff9a05964c1adac6e510df4a)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneLocationCalculation.cs	(.../DuneLocationCalculation.cs)	(revision ee62f9ef8c69cd574bd23077bf9079e3e8fbdd8c)
@@ -20,13 +20,14 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Base;
 
 namespace Ringtoets.DuneErosion.Data
 {
     /// <summary>
     /// Adapter class for a dune erosion calculation.
     /// </summary>
-    public class DuneLocationCalculation
+    public class DuneLocationCalculation : Observable
     {
         /// <summary>
         /// Creates a new instance of <see cref="DuneLocationCalculation"/>.
Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionDataSynchronizationService.cs
===================================================================
diff -u -rd18c49efb0d6e0b49fb9a54daf3589d6069a62b1 -ree62f9ef8c69cd574bd23077bf9079e3e8fbdd8c
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionDataSynchronizationService.cs	(.../DuneErosionDataSynchronizationService.cs)	(revision d18c49efb0d6e0b49fb9a54daf3589d6069a62b1)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionDataSynchronizationService.cs	(.../DuneErosionDataSynchronizationService.cs)	(revision ee62f9ef8c69cd574bd23077bf9079e3e8fbdd8c)
@@ -58,10 +58,12 @@
             {
                 throw new ArgumentNullException(nameof(failureMechanism));
             }
+
             if (hydraulicBoundaryLocations == null)
             {
                 throw new ArgumentNullException(nameof(hydraulicBoundaryLocations));
             }
+
             if (duneLocations == null)
             {
                 throw new ArgumentNullException(nameof(duneLocations));
@@ -112,6 +114,32 @@
                             .ToArray();
         }
 
+        /// <summary>
+        /// Clears the output of the dune location calculations within the collection.
+        /// </summary>
+        /// <param name="calculations">The calculations for which the output needs to be cleared.</param>
+        /// <returns>All objects changed during the clear.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="calculations"/> is <c>null</c>.</exception>
+        public static IEnumerable<IObservable> ClearDuneCalculationsOutput(IEnumerable<DuneLocationCalculation> calculations)
+        {
+            if (calculations == null)
+            {
+                throw new ArgumentNullException(nameof(calculations));
+            }
+
+            var affectedCalculations = new List<IObservable>();
+            foreach (DuneLocationCalculation calculation in calculations)
+            {
+                if (calculation.Output != null)
+                {
+                    calculation.Output = null;
+                    affectedCalculations.Add(calculation);
+                }
+            }
+
+            return affectedCalculations;
+        }
+
         private static bool DoesHydraulicBoundaryLocationMatchWithDuneLocation(HydraulicBoundaryLocation hydraulicBoundaryLocation,
                                                                                ReadDuneLocation readDuneLocation)
         {
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneLocationCalculationTest.cs
===================================================================
diff -u -rc743d1f229ff553fff9a05964c1adac6e510df4a -ree62f9ef8c69cd574bd23077bf9079e3e8fbdd8c
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneLocationCalculationTest.cs	(.../DuneLocationCalculationTest.cs)	(revision c743d1f229ff553fff9a05964c1adac6e510df4a)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneLocationCalculationTest.cs	(.../DuneLocationCalculationTest.cs)	(revision ee62f9ef8c69cd574bd23077bf9079e3e8fbdd8c)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Base;
 using NUnit.Framework;
 using Ringtoets.DuneErosion.Data.TestUtil;
 
@@ -46,11 +47,12 @@
             var duneLocation = new TestDuneLocation();
 
             // Call
-            var duneLocationCalculation = new DuneLocationCalculation(duneLocation);
+            var calculation = new DuneLocationCalculation(duneLocation);
 
             // Assert
-            Assert.AreSame(duneLocation, duneLocationCalculation.DuneLocation);
-            Assert.IsNull(duneLocationCalculation.Output);
+            Assert.IsInstanceOf<Observable>(calculation);
+            Assert.AreSame(duneLocation, calculation.DuneLocation);
+            Assert.IsNull(calculation.Output);
         }
     }
 }
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Service.Test/DuneErosionDataSynchronizationServiceTest.cs
===================================================================
diff -u -rd18c49efb0d6e0b49fb9a54daf3589d6069a62b1 -ree62f9ef8c69cd574bd23077bf9079e3e8fbdd8c
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Service.Test/DuneErosionDataSynchronizationServiceTest.cs	(.../DuneErosionDataSynchronizationServiceTest.cs)	(revision d18c49efb0d6e0b49fb9a54daf3589d6069a62b1)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Service.Test/DuneErosionDataSynchronizationServiceTest.cs	(.../DuneErosionDataSynchronizationServiceTest.cs)	(revision ee62f9ef8c69cd574bd23077bf9079e3e8fbdd8c)
@@ -252,5 +252,43 @@
                     location
                 }, affected);
         }
+
+        [Test]
+        public void ClearDuneLocationOutput_CalculationsNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => DuneErosionDataSynchronizationService.ClearDuneCalculationsOutput(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("calculations", exception.ParamName);
+        }
+
+        [Test]
+        public void ClearDuneLocationOutput_CalculationsWithOutput_OutputClearedAndAffectedItemsReturned()
+        {
+            // Setup
+            var calculationWithOutput = new DuneLocationCalculation(new TestDuneLocation())
+            {
+                Output = new TestDuneLocationOutput()
+            };
+            var calculationWithoutOutput = new DuneLocationCalculation(new TestDuneLocation());
+
+            var calculations = new[]
+            {
+                calculationWithOutput,
+                calculationWithoutOutput
+            };
+
+            // Call
+            IEnumerable<IObservable> affected = DuneErosionDataSynchronizationService.ClearDuneCalculationsOutput(calculations);
+
+            // Assert
+            Assert.IsNull(calculationWithOutput.Output);
+            CollectionAssert.AreEqual(new[]
+            {
+                calculationWithOutput
+            }, affected);
+        }
     }
 }
\ No newline at end of file