diff --git a/app/borehole_map.py b/app/borehole_map.py
index 1e5d70c..c1bedbd 100644
--- a/app/borehole_map.py
+++ b/app/borehole_map.py
@@ -22,7 +22,7 @@ def extract_geojson(filepath: Path) -> dict:
     Read an AGS4 file and extract geojson represenation of LOCA table and
     metadata.
     """
-    logger.info("Extracting geojson from  %s", filepath.name)
+    logger.info("Extracting geojson from %s", filepath.name)
 
     # Read data file
     tables, load_error, _ = load_tables_reporting_errors(filepath)
diff --git a/app/validation.py b/app/validation.py
index e4f950a..2f5b73a 100644
--- a/app/validation.py
+++ b/app/validation.py
@@ -47,6 +47,8 @@ def validate(filename: Path,
 
     all_errors = {}
     all_checkers = []
+    bgs_additional_metadata = {}
+    ags_summary = []
     # Don't process if file is not .ags format
     if filename.suffix.lower() != '.ags':
         all_errors.update(
@@ -57,19 +59,32 @@ def validate(filename: Path,
         # Run checkers to extract errors and other metadata
         for checker in checkers:
             # result is a dictionary with 'errors', 'checker' and other keys
-            result = checker(filename, standard_AGS4_dictionary=dictionary_file)
+            result: dict = checker(filename, standard_AGS4_dictionary=dictionary_file)
+
             # Pull 'errors' out to add to running total
             all_errors.update(result.pop('errors'))
             all_checkers.append(result.pop('checker'))
-            # Handle additional metadata
+
+            # Extract checker-dependent additional metadata
             try:
-                response['additional_metadata'].update(result.pop('additional_metadata'))
+                bgs_additional_metadata = result.pop('additional_metadata')
             except KeyError:
-                # No additional metadata
                 pass
+
+            try:
+                ags_summary = result.pop('summary')
+            except KeyError:
+                pass
+
             # Add remaining keys to response
             response.update(result)
 
+    # We only want one checker-dependent metadata; use BGS if available.
+    if bgs_additional_metadata:
+        response['additional_metadata'] = bgs_additional_metadata
+    else:
+        response['summary'] = ags_summary
+
     error_count = len(reduce(lambda total, current: total + current, all_errors.values(), []))
     if error_count > 0:
         message = f'{error_count} error(s) found in file!'
diff --git a/test/unit/test_validation.py b/test/unit/test_validation.py
index 2716409..43f6e53 100644
--- a/test/unit/test_validation.py
+++ b/test/unit/test_validation.py
@@ -15,12 +15,32 @@
 
 def mock_check_ags(filename, standard_AGS4_dictionary=None):
     return dict(checker='ags', dictionary='some_dict',
-                errors={})
+                errors={},
+                summary=[{'desc': '7 groups identified in file: PROJ ABBR TRAN TYPE UNIT '
+                          'LOCA SAMP',
+                          'group': '',
+                          'line': ''},
+                         {'desc': '1 data row(s) in LOCA group', 'group': '', 'line': ''},
+                         {'desc': 'Optional DICT group present? False',
+                          'group': '',
+                          'line': ''},
+                         {'desc': 'Optional FILE group present? False',
+                          'group': '',
+                          'line': ''}]
+                )
 
 
 def mock_check_bgs(filename, **kwargs):
     return dict(checker='bgs',
-                errors={'BGS': [{}]})
+                errors={'BGS': [{}]},
+                additional_metadata={
+                    'bgs_all_groups': '7 groups identified in file: '
+                    'PROJ ABBR TRAN TYPE UNIT LOCA SAMP',
+                    'bgs_dict': 'Optional DICT group present: False',
+                    'bgs_file': 'Optional FILE group present: False',
+                    'bgs_loca_rows': '1 data rows in LOCA group',
+                    'bgs_projects': '1 projects found: 121415 (ACME Gas Works Redevelopment)'
+                })
 
 
 @freeze_time(FROZEN_TIME)
@@ -36,6 +56,17 @@ def test_validate_default_checker():
         'filesize': 0,
         'message': 'All checks passed!',
         'time': dt.datetime(2021, 8, 23, 14, 25, 43, tzinfo=dt.timezone.utc),
+        'summary': [{'desc': '7 groups identified in file: PROJ ABBR TRAN TYPE UNIT '
+                     'LOCA SAMP',
+                     'group': '',
+                     'line': ''},
+                    {'desc': '1 data row(s) in LOCA group', 'group': '', 'line': ''},
+                    {'desc': 'Optional DICT group present? False',
+                     'group': '',
+                     'line': ''},
+                    {'desc': 'Optional FILE group present? False',
+                     'group': '',
+                     'line': ''}],
         'valid': True,
         'additional_metadata': {}}
 
@@ -60,7 +91,14 @@ def test_validate_bgs_checker():
         'message': '1 error(s) found in file!',
         'time': dt.datetime(2021, 8, 23, 14, 25, 43, tzinfo=dt.timezone.utc),
         'valid': False,
-        'additional_metadata': {}}
+        'additional_metadata': {'bgs_all_groups': '7 groups identified in file: PROJ '
+                                'ABBR TRAN TYPE UNIT LOCA SAMP',
+                                'bgs_dict': 'Optional DICT group present: False',
+                                'bgs_file': 'Optional FILE group present: False',
+                                'bgs_loca_rows': '1 data rows in LOCA group',
+                                'bgs_projects': '1 projects found: 121415 (ACME Gas '
+                                'Works Redevelopment)'}
+    }
 
     # Act
     response = validation.validate(filename, checkers=[mock_check_bgs])
@@ -83,7 +121,14 @@ def test_validate_both_checkers():
         'message': '1 error(s) found in file!',
         'time': dt.datetime(2021, 8, 23, 14, 25, 43, tzinfo=dt.timezone.utc),
         'valid': False,
-        'additional_metadata': {}}
+        'additional_metadata': {
+            'bgs_all_groups': '7 groups identified in file: '
+            'PROJ ABBR TRAN TYPE UNIT LOCA SAMP',
+            'bgs_dict': 'Optional DICT group present: False',
+            'bgs_file': 'Optional FILE group present: False',
+            'bgs_loca_rows': '1 data rows in LOCA group',
+            'bgs_projects': '1 projects found: 121415 (ACME Gas Works Redevelopment)'
+        }}
 
     # Act
     response = validation.validate(filename, checkers=[mock_check_bgs, mock_check_ags])
@@ -106,6 +151,7 @@ def test_validate_non_ags():
         'message': '1 error(s) found in file!',
         'time': dt.datetime(2021, 8, 23, 14, 25, 43, tzinfo=dt.timezone.utc),
         'valid': False,
+        'summary': [],
         'additional_metadata': {}}
 
     # Act