private static DataTable GetBatchData(IExcelFileReader excelFileReader)
        {
            // Get batch indicator data from worksheet as data table 
            DataTable batchDataTable = excelFileReader.GetBatchData();

            // Delete non-valid rows
            foreach (var row in batchDataTable.Select("IndicatorId is null"))
            {
                row.Delete();
            }

            batchDataTable.AcceptChanges();
            return batchDataTable;
        }