Lindsay Light Streeterville Thorium Monitoring Area Map
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Lindsay Light Streeterville Thorium Monitoring Area map (PDF)(1 pg, 2 MB,
July 2016)
The Thorium Monitoring Area encompasses all buildings and rights-of-ways within the three areas depicted north and south of the Chicago River. Where a boundary line runs along a street, thorium monitoring is required within the boundary line for both the properties and any sidewalks adjacent to the monitored properties.