Former Naval Station Treasure Island

Gateview Avenue Neighborhood

 

Cleanup at Gateview Avenue Neighborhood

In the first half of 2017, the Navy is completing cleanup in the Gateview Avenue Neighborhood. You may have noticed that the Navy has demolished Buildings 1311, 1313 and 1325. This was done so that the Navy could dig down and reach petroleum that is between 4 and 10 feet underground. This petroleum was the result of old tanks leaking into the groundwater; this occured decades ago and the petroleum has -- over the decades -- changed the chemistry of the ground water, allowing naturally occurring metals and minerals in the soil to "leach out" into the groundwater. The metal of concern here is arsenic; arsenic levels in the groundwater are elevated and pose a potential risk to San Francisco Bay. This is NOT a concern for residents living in the neighborhood. 

The Navy is taking two steps to cleanup this area.

  • First, we are digging out much of the petroleum-saturated soil (from 4ft to 10ft below ground surface).
  • Second, we will add a commonly used oxygen-releasing compound to change underground conditions and allow the naturally-occurring microbes in the soil to digest any remaining petroleum in the soil and groundwater.

Summary Reports of Neighborhood
Streets at Treasure Island 

 

 

Over time, this should greatly diminish the concentration of arsenic in the groundwater which moves very slowly from under Gateview Avenue to San Francisco Bay. During this six month project, residents will see heavy construction equipment being used. The Navy will be digging and stock piling soil as well as skimming the surface of the groundwater. The area will be fenced off but residents will be able to see progress as the project continues. There will be eleven blue barrels that will spray an EPA-approved deodorizer along the perimeter of the work site. This will help control odors during the digging. The Navy will cover stock piles with a thick, plastic tarpaulin during non-work hours. Finally, the Navy will be monitoring air quality throughout the duration of the project.  

 

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Naval Station Treasure Island
Off-site Soil Disposal

The United States Navy is continuing its environmental cleanup actions within the residential neighborhood. As part of the environmental work, the Navy is trucking soil off-site from the Gateview Avenue project site. This soil contains petroleum products. 
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For a  larger view please click on the photos. 

  

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Naval Station Treasure Island

Navy working with SF Water Department during Petroleum Cleanup



The United States Navy is continuing its environmental cleanup actions within the residential neighborhood. In order to complete the environmental work, the City of San Francisco Water Department will work on the water line running beneath Gateview Avenue. This flyer provides information on how and where the work will be conducted.
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Naval Station Treasure Island
Digging on Gateview Avenue

The United States Navy is continuing its environmental cleanup actions within the residential neighborhood. This notice is to inform residents of a single small area in Gateview Avenue where the Navy will dig a 6 foot by 6 foot hole in order to service an underground water pipe.This flyer provides information on how and where the work will be conducted.
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