People NOT in these zones, including the Tri-Cities, Prosser, Walla Walla, and other surrounding communities in the state of Washington are not considered at risk from an emergency at the Umatilla Chemical Depot.
The Immediate Response Zone is the area closest to the Umatilla Chemical Depot. People who live in this zone may have to take action immediately to protect themselves, if advised to do so by county officials. The Immediate Response Zones in the southern portion of Benton County, include the communities of Plymouth and Paterson which are approximately six to seven miles from the Depot. It consists of two sectors:
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Sector J is the area between Highway 14 on the north and the Columbia River on the south, and Highway 221 on the west and Christy Road on the east. Sector J includes the community of Paterson. |
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Sector K is the area between Highway 14 on the north and the Columbia River on the south, and Christy Road on the west to Plymouth Road on the east. Sector K includes the community of Plymouth. |
The Protective Action Zone is further away from the Umatilla Chemical Depot. The people in this zone will have more time to take action, if necessary. It has three sectors:
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Sector U includes the area between Klickitat County on the west to Highway 221 on the east, and from Sellards Road on the north to the Columbia River on the south. |
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Sector V is bounded by Highway 14 on the south, Sellards Road on the north, Highway 221 on the west and Plymouth Road on the east. |
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Sector W is the area from the Columbia River on the south to Locust Grove, Bateman, Owens and Kirk roads on the north. On the west side the boundary is Plymouth Road. On the east side the boundary is Finley Road. |
There is also a Marine Safety Zone (Sector M), which includes a portion of the Columbia River. It runs from Juniper Canyon (River Mile 305) on the east, down river to the west end of Crow Butte State Park (River Mile 262).
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