Notes
This report presents groundwater monitoring results for the Third Runway Embankment Fill Monitoring Program at Seattle-Tacoma International Airport for monitoring years 2011-2012 (PY4/PY5). Prepared by Pacific Groundwater Group for the Port of Seattle, the report covers water level measurements, sampling methods, laboratory analysis, and data evaluation including trace metals, petroleum hydrocarbons, and conventional analytes. The report includes trend analysis, baseline data updates, and special considerations for arsenic and mercury at specific monitoring wells.