diff --git a/README.md b/README.md
index b109120..0485261 100644
--- a/README.md
+++ b/README.md
@@ -26,3 +26,53 @@ DROP TABLE raw.performance_review_sub_scoring;
 DROP TABLE raw.performance_review_total_scoring;
 DROP TABLE raw.positions;
 DROP TABLE raw.workers;
+
+
+
+Data quality checks:
+
+-- Total worker count
+SELECT count(*)
+from clean.worker;
+
+-- Active workers
+SELECT count(*)
+from clean.worker
+where employment_exit_date is null;
+
+-- Number of job change / position change records
+WITH history_counts AS (
+	SELECT w.id, count(*) as history_count
+	from clean.worker w
+	left join clean.job_change jc on w.id = jc.worker_id
+	group by w.id
+) 
+SELECT history_count, count(*)
+from history_counts
+group by history_count
+order by history_count;
+
+-- Years at the company
+WITH yac AS (
+    SELECT 
+        w.id, 
+        EXTRACT('YEAR' FROM AGE(COALESCE(employment_exit_date, CURRENT_DATE), employment_start)) AS years_at_company
+    FROM clean.worker w
+)
+SELECT 
+    yac.years_at_company, 
+    COUNT(*)
+FROM yac
+GROUP BY yac.years_at_company
+ORDER BY yac.years_at_company
+
+-- Worker id's with < 0 years at company or > 60 years
+WITH yac AS (
+    SELECT 
+        w.id, w.worker_hris_id, w.employment_start, w.employment_exit_date,
+        EXTRACT('YEAR' FROM AGE(COALESCE(employment_exit_date, CURRENT_DATE), employment_start)) AS years_at_company
+    FROM clean.worker w
+)
+SELECT *
+from yac
+where years_at_company < 0 or years_at_company > 60;
\ No newline at end of file
diff --git a/transform/models/tap_spreadsheets_anywhere/department.sql b/transform/models/tap_spreadsheets_anywhere/department.sql
index 366bd2c..82888f8 100644
--- a/transform/models/tap_spreadsheets_anywhere/department.sql
+++ b/transform/models/tap_spreadsheets_anywhere/department.sql
@@ -13,6 +13,7 @@ latest_departments as (
         from {{ source('tap_spreadsheets_anywhere', 'departments') }}
     ) t
     where rn = 1
+    and id not in ('CAD', 'CSAD')
 ),
 department_tree as (
     -- Anchor: top-level department (parent_id is set to Sarens Group in the Excel)