EXH0074017713

PCHBPollution Control Hearings Board of the State of Washington

D. Conditions to Prevent Transport of Contaminants: F1. All Master Plan Update projects and all associated utility corridors shall be constructed in a manner that will prevent the possible interception of contaminated groundwater originating from the Airport Maintenance and Operations Area or other potentially contaminated STIA areas. The Port shall develop a plan to monitor potential contaminant ransport to soil and groundwater via subsurface utility lines at the $TIA by September 14, 2001. The plan shall be _ubmitted to Ecology's FederalPermit Manager, SeaTac Third Runway. 1:2. The Port shall have staff trained in the detection of hazardous materials and contaminated soils or water inspect on a regular basis all areas where there is clearing and grading, or construction under way. If hazardous materials or contaminated soils or other indications oT contamination are discovered the Port shall immediately cease construction in the suspect area, secure the site and clean up the areain accordance with the Model Toxics Corm-el Act (MTCA), Chapter 70.105d RCW, and with generally accepted best management practices. F3. The Portshall administer and periodically update the contaminant database and contaminant maps aad figures for the STIA. The database shall be updated as new information is received. The maps and figures shall be updated an_:_xa]ly and delivered to Ecology's FederalPermit Manager in a report of findings for review. Maps and figures shall b_-sir,.ilar to the maps and figures shown in the Port's "Analysis of Preferential Ground Water Flow Paths Relative to P"ol-'.,sed Third Runway," dated June 21, 2001. F4. The…
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