diff --git a/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggConfig.java b/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggConfig.java
index 8b670b514d544ad59631099475804f7ac928afb8..62cf51fdb2c56c1511ccac7e9b2321befc3c59bc 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggConfig.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggConfig.java
@@ -6,7 +6,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import gov.usgs.earthquake.nshmp.calc.CalcConfig.Disagg.Bins;
-import gov.usgs.earthquake.nshmp.calc.DisaggExport.εBin;
+import gov.usgs.earthquake.nshmp.calc.DisaggExport.epsilonBin;
 import gov.usgs.earthquake.nshmp.gmm.Imt;
 
 /**
@@ -24,7 +24,7 @@ import gov.usgs.earthquake.nshmp.gmm.Imt;
 final class DisaggConfig {
 
   final Bins bins;
-  final List<εBin> εBins;
+  final List<epsilonBin> εBins;
   final double contributorLimit;
 
   final Imt imt;
@@ -37,7 +37,7 @@ final class DisaggConfig {
 
   private DisaggConfig(
       Bins bins,
-      List<εBin> εBins,
+      List<epsilonBin> εBins,
       double contributorLimit,
       Imt imt,
       DisaggDataset model,
@@ -90,7 +90,7 @@ final class DisaggConfig {
   static class Builder {
 
     private Bins bins;
-    private List<εBin> εBins;
+    private List<epsilonBin> εBins;
     private Double contributorLimit;
 
     private Imt imt;
@@ -158,13 +158,13 @@ final class DisaggConfig {
     }
   }
 
-  static List<εBin> createEpsilonBins(List<Double> εLevels, double εDelta) {
+  static List<epsilonBin> createEpsilonBins(List<Double> εLevels, double εDelta) {
     double εDeltaBy2 = εDelta / 2.0;
-    List<εBin> bins = new ArrayList<>();
+    List<epsilonBin> bins = new ArrayList<>();
     for (int i = 0; i < εLevels.size(); i++) {
       Double min = (i == 0) ? null : εLevels.get(i) - εDeltaBy2;
       Double max = (i == εLevels.size() - 1) ? null : εLevels.get(i) + εDeltaBy2;
-      bins.add(new εBin(i, min, max));
+      bins.add(new epsilonBin(i, min, max));
     }
     return List.copyOf(bins);
   }
diff --git a/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggExport.java b/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggExport.java
index c684929b5f6df36760164bb458afbfc4bcf8234e..a92bf6e2148f600c5932ad4d0d7f6f3a5405e7b5 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggExport.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/calc/DisaggExport.java
@@ -91,13 +91,13 @@ final class DisaggExport {
         double εBar = dd.rmεScaled.get(ri, mi) / rmBinWeight;
         double[] εValues = dd.rmε.column(ri, mi).yValues().toArray();
         DoubleData.multiply(toPercent, εValues);
-        List<εData> εDataList = new ArrayList<>();
+        List<epsilonData> εDataList = new ArrayList<>();
         for (int i = 0; i < εValues.length; i++) {
           double εValue = εValues[i];
           if (εValue <= 0.0) {
             continue;
           }
-          εDataList.add(new εData(i, εValue));
+          εDataList.add(new epsilonData(i, εValue));
         }
         RmBin rmBin = new RmBin(
             r, m,
@@ -122,7 +122,7 @@ final class DisaggExport {
     final double rBar;
     final double mBar;
     final double εBar;
-    final List<εData> εdata;
+    final List<epsilonData> εdata;
 
     private RmBin(
         double r,
@@ -130,7 +130,7 @@ final class DisaggExport {
         double rBar,
         double mBar,
         double εBar,
-        List<εData> εdata) {
+        List<epsilonData> εdata) {
 
       this.r = r;
       this.m = m;
@@ -145,12 +145,12 @@ final class DisaggExport {
    * Single ε value bin.
    */
   @SuppressWarnings("unused")
-  private static final class εData {
+  private static final class epsilonData {
 
     final int εbin;
     final double value;
 
-    private εData(int εbin, double value) {
+    private epsilonData(int εbin, double value) {
       this.εbin = εbin;
       this.value = value;
     }
@@ -358,23 +358,23 @@ final class DisaggExport {
     return List.copyOf(jsonContributors);
   }
 
-  private static List<SummaryItem> toSummaryItems(List<εBin> εBins) {
+  private static List<SummaryItem> toSummaryItems(List<epsilonBin> εBins) {
     return εBins.stream()
         .map(DisaggExport::εBinToSummary)
         .collect(Collectors.toList());
   }
 
-  private static SummaryItem εBinToSummary(εBin bin) {
+  private static SummaryItem εBinToSummary(epsilonBin bin) {
     return new SummaryItem("ε" + bin.id, bin.toString(), null);
   }
 
-  static final class εBin {
+  static final class epsilonBin {
 
     final int id;
     final Double min;
     final Double max;
 
-    εBin(int id, Double min, Double max) {
+    epsilonBin(int id, Double min, Double max) {
       this.id = id;
       this.min = min;
       this.max = max;