The facility updated all site P&IDs to accurately reflect the as-built construction with sufficient information, revised Line 9 and 10 Gasser SOP operating limits, painted tanks, upgraded discharge vent piping for Tanks 10 and 21 based on pressure relief calculations, revised mechanical integrity program for pressure vessels & heat exchanges showing revised 5 year visual inspection requirements, developed work plans for all contractors? activities and audit programs to ensure contractors? performance, trained all authorized hot work employees.