diff --git a/relog-web/src/casebuilder/InputPage.js b/relog-web/src/casebuilder/InputPage.js
index bbfad16..bc8f439 100644
--- a/relog-web/src/casebuilder/InputPage.js
+++ b/relog-web/src/casebuilder/InputPage.js
@@ -235,7 +235,7 @@ const InputPage = () => {
         "disposal limit (tonne)",
       ].forEach((key) => {
         newData.plants[plantName][key] = { ...newData.plants[plantName][key] };
-        newData.plants[plantName][key][productName] = 0;
+        newData.plants[plantName][key][productName] = "0";
       });
       save(newData);
       return newData;
diff --git a/relog-web/src/casebuilder/export.js b/relog-web/src/casebuilder/export.js
index 3528929..317f781 100644
--- a/relog-web/src/casebuilder/export.js
+++ b/relog-web/src/casebuilder/export.js
@@ -277,7 +277,7 @@ export const exportPlant = (original, parameters) => {
       const v = exportValueAcf(dispCost, origDict);
       if (v) {
         resDict.disposal[dispName] = { "cost ($/tonne)": v };
-        const limit = original["disposal limit (tonne)"][dispName];
+        const limit = String(original["disposal limit (tonne)"][dispName]);
         if (limit.length > 0) {
           resDict.disposal[dispName]["limit (tonne)"] = exportValue(
             limit,
diff --git a/relog-web/src/casebuilder/export.test.js b/relog-web/src/casebuilder/export.test.js
index d358ea0..4f80511 100644
--- a/relog-web/src/casebuilder/export.test.js
+++ b/relog-web/src/casebuilder/export.test.js
@@ -213,7 +213,7 @@ const samplePlantsOriginal = [
     },
     "disposal limit (tonne)": {
       "Hydrogen gas": "10",
-      "Carbon dioxide": "",
+      "Carbon dioxide": 0,
       Tar: "",
     },
     "emissions (tonne/tonne)": {
@@ -406,6 +406,7 @@ const samplePlantsExported = [
           },
           "Carbon dioxide": {
             "cost ($/tonne)": [0, 0, 0],
+            "limit (tonne)": [0, 0, 0],
           },
           Tar: {
             "cost ($/tonne)": [200, 400, 800],
@@ -439,6 +440,7 @@ const samplePlantsExported = [
           },
           "Carbon dioxide": {
             "cost ($/tonne)": [0, 0, 0],
+            "limit (tonne)": [0, 0, 0],
           },
           Tar: {
             "cost ($/tonne)": [100, 200.0, 400],