was placed on the National Priorities List of Superfund sites. The site's contamination is addressed in twelve long-term remedial phases, mainly soil excavation and disposal, vertical containment walls installed in the subsurface and groundwater extraction wells, soil vapor extraction and air sparging to treat petroleum and solvent contamination, and where groundwater extraction and treatment efforts are uncertain (zone 3) improvement thereof and wellhead preparing treatment capability for the Haven water supply well. At two sites a permeable reactive barrier was installed to intercept and destroy the groundwater contamination (sites 49 and 73). The groundwater is monitored long term and its use is restricted. In June 2014, Portsmouth shut down Haven Well, a water well serving Pease International Tradeport, after Air Force tests showed perfluorooctane sulfonic acid (PFOS) 12.5 times higher than the EPA's Provisional Health Advisory. Perfluorooctanoic acid (PFOA) was also found, but below the health advisory level. The Air Force had tested the well in advance of an EPA requirement beginning in 2015. In 2015, the CDC announced blood testing of 500 people exposed to this contaminant from the Haven Well, thought to stem from the Air Force using firefighting foam. In July 2015, the preliminary average of the first 98 blood tests was higher than the national average. The EPA ordered the Air Force to "design, install and operate a groundwater treatment system for the Haven well" that will "at a minimum restore contaminated groundwater in the Pease aquifer to levels less than the PHA for PFOA and PFOS" within 420 days or about 14 months. The EPA predicted the contamination to continue to migrate toward the Harrison, Smith, Collins and Portsmouth No. 1 wells, which are known as the "southern well field" at the tradeport. The Air Force used the firefighting foam in 19 other areas, which have not been tested yet. In mid July, the New Hampshire State Department of Health and Human Services announced it was "exploring all measures to reopen testing for anyone exposed to contaminated water" at Haven Well. Exposed firefighters began filing workers compensation claims with the city, and mothers whose children were exposed to contaminated water at a daycare center and who developed elevated PFOA levels have spoken out. The city of Portsmouth requested the two other wells be treated; in September, the Air Force announced they are “pursuing options” to treat all three city-owned wells. In early 2016, a Community