diff --git a/modules/contrail/util.py b/modules/contrail/util.py
index c6977a065bfa2175878b908f02714e6dffd3ac12..c37dc5c2dbaf37f0337d0d835f9ce0b177e75404 100644
--- a/modules/contrail/util.py
+++ b/modules/contrail/util.py
@@ -1,6 +1,5 @@
 import re
 import datetime
-import time
 from datetime import timezone
 
 import numpy as np
@@ -12,7 +11,7 @@ import matplotlib.pyplot as plt
 import matplotlib.image as mpimg
 import h5py
 from util.util import get_grid_values_all
-from util.gfs_reader import *
+from util.gfs_reader import get_volume, volume_np_to_xr
 from util.geos_nav import GEOSNavigation
 from aeolus.datasource import GFSfiles
 import cartopy.crs as ccrs