diff --git a/go.mod b/go.mod
index 037e213d5..114c4cbf3 100644
--- a/go.mod
+++ b/go.mod
@@ -39,6 +39,7 @@ require (
 	github.com/lnashier/viper v0.0.0-20180730210402-cc7336125d12
 	github.com/magiconair/properties v1.7.3 // indirect
 	github.com/mattn/go-sqlite3 v1.11.0
+	github.com/opencontainers/image-spec v1.0.2 // indirect
 	github.com/pelletier/go-toml v1.0.1 // indirect
 	github.com/rs/cors v1.3.0 // indirect
 	github.com/russross/blackfriday v2.0.0+incompatible // indirect
diff --git a/go.sum b/go.sum
index b7b8c9959..41c3ceda6 100644
--- a/go.sum
+++ b/go.sum
@@ -819,6 +819,8 @@ github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3I
 github.com/opencontainers/image-spec v1.0.0/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opencontainers/image-spec v1.0.1 h1:JMemWkRwHx4Zj+fVxWoMCFm/8sYGGrUVojFA6h/TRcI=
 github.com/opencontainers/image-spec v1.0.1/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
+github.com/opencontainers/image-spec v1.0.2 h1:9yCKha/T5XdGtO0q9Q9a6T5NUCsTn/DrBg0D7ufOcFM=
+github.com/opencontainers/image-spec v1.0.2/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opencontainers/runc v0.0.0-20190115041553-12f6a991201f/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runc v1.0.0-rc8.0.20190926000215-3e425f80a8c9/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
diff --git a/io.go b/io.go
index 61721a057..a5e4b339e 100644
--- a/io.go
+++ b/io.go
@@ -274,6 +274,13 @@ func FromAEP(r []aep.RecordGridded, grids []*aep.GridDef, gi int, VOC, NOx, NH3,
 	groundERecs := make(map[int]*EmisRecord)
 
 	for _, rec := range r {
+		var totalEmis float64
+		for _, v := range rec.Totals() {
+			totalEmis += math.Abs(v.Value())
+		}
+		if totalEmis == 0 {
+			continue
+		}
 		gridSrg, _, inGrid, err := rec.GridFactors(gi)
 		if err != nil {
 			return nil, err