Silverbell Landfill | WQARF Site

silverbell landfill

Silverbell Landfill | Site Overview

Registry placement date: April 23, 1999

Score: 51

County: Pima

Location: 3200 North Silverbell Road in northwest Tucson, approximately bounded by Sweetwater Drive on the north, Grant Road/Ironwood Hills Drive on the south, Interstate 10 on the east and Silverbell Road on the west and comprised of approximately 40 acres

If you own a private well, live in or near the site boundaries, and have not had your well tested, please contact ADEQ

Contaminants of concern: Tetrachloroethene (PCE), trichloroethene (TCE), cis-1,2-dichloroethene (cis-1,2-DCE) and vinyl chloride

Action taken: In 2001, the City of Tucson (COT) began operation of a full-scale soil vapor extraction (SVE) system to remove and treat contaminated volatile organic compounds (VOC) and landfill gases contributing to groundwater contamination. From December 2006 until 2008, the system operated intermittently to control methane migration. In April 2008, the system was shut down and the equipment was removed. The City still conducts soil-gas rebound testing periodically.

In 2010, COT proposed to install a pump-and-treat (P+T) system to address the contaminant plume in the groundwater under the Site. Several rounds of design revisions and modelling followed. Construction of the treatment system began in November 2018, and concluded in late 2019.

Status: The Groundwater Extraction and Treatment System (GETS) began full-time operation in April 2020.  The system uses granular active carbon to treat up to one thousand gallons of VOC-contaminated groundwater, extracted from three wells, per minute. The treated water is then piped to the Sweetwater Recharge Facility for infiltration back into the aquifer.

Community Advisory Board (CAB): Not applicable under “old WQARF” laws/rules.