Broadway North And South Landfills (Non-City Owned Landfills)
The Broadway-Pantano Water Quality Assurance Revolving Fund (WQARF) Site is a State Superfund Site which includes the Broadway North and South Landfills. The property is privately owned, however the City of Tucson disposed of municipal solid waste in the Broadway North Landfill in the past. Groundwater contaminated by tetrachloroethene (PCE), above regulatory standards, has been detected. The City was involved a work share agreement with the Arizona Department of Environmental Quality (ADEQ) to monitor groundwater quality from December 2008 - February 2015. The Western Containment System (WCS), which removed and treated PCE contaminated groundwater, operated from March 2003 - October 2012. It was shutdown due to low PCE concentrations in the groundwater extraction wells.
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The Arizona Department of Environmental Quality (ADEQ) with the assistance of their consultant completed a Final Feasibility Study for the Broadway - Pantano WQARF Site. The report is available at the ADEQ, Waste Programs Superfund State WQARF website.
The completion of the work share agreement between the City and the Arizona Department of Environmental Quality (ADEQ) to conduct quarterly groundwater monitoring of selected wells at the site. The ADEQ contractor will be responsible for all future groundwater monitoring activities.
The WCS was shutdown in October 2012 due to low tetrachloroethene (PCE) concentrations at extraction wells. Since it had began operation in March 2003, the system had removed a total of approximately 55 pounds of tetrachloroethene (PCE) and treated 3,160,000,000 gallons of groundwater.
The Arizona Department of Environmental Quality with the assistance of their consultant completed a site wide groundwater monitoring event for the Broadway - Pantano WQARF Site. The report documenting this data, is available in the Attachments/Reports section of this website.
The Western Containment System (WCS) began operation. It was designed to remove and treat volatile organic compounds (VOCs) from groundwater downgradient of the Broadway North Landfill.
The City and ADEQ entered into a work share agreement for investigation and remediation activities concerning the Broadway-Pantano WQARF Site.
The City installed and maintained a soil vapor extraction/air injection (SVE/AI) system to clean up the source of groundwater contamination in the deep subsurface beneath the Broadway North Landfill. The system removed over 5,000 pounds of volatile organic compounds (VOCs) from the subsurface. The system was shut off in 2002, and testing in 2003, 2004, and 2008 indicates that soil vapor VOC concentrations remain low.
The Broadway-Pantano Site, which includes the Broadway-North Landfill, was placed on the WQARF Registry, designating the area as a State Superfund Site.
The City completed investigations to monitor groundwater quality and the nature and extent of contamination. The investigations confirmed that the landfill was a major source of contamination.
The City installed a treatment system on the St. Joseph's Hospital groundwater supply well due to PCE concentrations approaching the regulatory standard. The treatment system consisted of two activated carbon canisters to remove the PCE. The City maintained and monitored the treatment system until 2009 when the hospital well failed. At this time, this system is not operating, but the hospital is planning to drill a replacement well.
PCE was detected in a drinking water well at the western edge of the Broadway North Landfill. The well was shut down and the City began installing monitoring wells to assess groundwater quality in the area.