Waste Programs Division

7th Avenue and Bethany Home Road | Site Overview

Registry placement date: Aug. 25, 2004

Score: 29

County: Maricopa

Location: Phoenix, bounded to the north by Maryland Avenue, to the south by Bethany Home Road, to the east by Fifth Avenue and to the west by Eighth Avenue. It includes the 2.6-acre former shopping center east of Seventh Avenue that housed a dry cleaning facility, as well as a former dry cleaner west of Seventh Avenue.

Contaminants of concern: Tetrachloroethene (PCE), trichloroethene (TCE) and vinyl chloride 

Action taken: ADEQ initiated an early response action (ERA) evaluation of the 2.6-acre site in October 2004 to characterize the source area of PCE-contaminated soil below the site. A soil vapor extraction (SVE) system operated from June 2005 to January 2006, and soil samples confirmed successful remediation to levels below ADEQ soil remediation levels (SRLs) and groundwater protection levels (GPLs).

In 2008, a site investigation of an additional dry cleaner in the area indicated that PCE had been released into the soil and groundwater beneath the site. 

Concentrations in soil at the property did not warrant further remediation, however, groundwater beneath the site contained PCE concentrations between 8.0 and 24 parts per billion (ppb) above the Aquifer Water Quality Standard (AWQS) of 5 ppb. TCE and vinyl chloride also were present above their respective AWQS. 

In January 2012, a sample from a Salt River Project (SRP) irrigation well, located approximately a half-mile north of the site, detected PCE at the AWQS of 5 ppb for the first time. ADEQ completed the final remedial investigation (RI) report and the feasibility study (FS) work plan in 2011. The feasibility study (FS) was completed in November 2012. A pilot test was completed in March 2014, and results indicate reductive chlorination is a feasible remedy at the site.

Status:  The proposed remedial action plan (PRAP) was completed in April 2015, and the Record of Decision (ROD) was issued June 30, 2016. The selected remedy is enhanced reductive de-chlorination with monitored natural attenuation (MNA).

Community Advisory Board (CAB): Established, merged with the Central and Camelback WQARF Site CAB and 16th Street and Camelback WQARF Site CAB in 2013 and meets on a regular basis.