West Van Buren

Registry placement date: April 10, 1998

Score: 50

County: Maricopa

Location: Western portion of Phoenix, bounded approximately to the north by West McDowell Road, to the east by 7th Avenue, to the south by West Lower Buckeye Road and to the west by 75th Avenue. In addition, a finger shaped plume exists from approximately West Buckeye Road and South 41st Avenue to West Watkins Street and South 11th Avenue. The plume is approximately 7 miles long, and there's also a finger shaped plume from approximately West Buckeye Road and South 41st Avenue to West Watkins Street and South 11th Avenue. 

Contaminants of concern: Tetrachloroethene (PCE), trichloroethene (TCE), 1,1,1-trichloroethane (1,1,1-TCA), 1,1-dichloroethane (1,1-DCA), cis-1,2-dichloroethene (cis-1,2-DCE), 1,1-dichloroethene (1,1-DCE) and chromium

Action taken: More than 50 monitor wells have been installed to further delineate the plume for an approximate total of 123 groundwater monitor wells. The final remedial investigation (RI) report was completed in August 2012. An early response action (ERA) has been proposed by the Roosevelt Irrigation District (RID) and conditionally approved by ADEQ. The RID wells that comprise the ERA are pumped approximately eight out of 12 months of the year.  As of August 2016, the RID wells have removed approximately 3,000 pounds of contaminants from groundwater since 2012.  

Groundwater monitoring and sampling has been conducted on a semiannual basis, generally in March and September, up until 2014. Two interested parties, the RID and the West Van Buren Working Group (WVBWG), submitted individual draft feasibility studies (FS) reports in July 2014. The FS reports were developed as part of the WQARF process that follows completion of the RI.

In 2015, a reduced groundwater sampling event was conducted of selected wells throughout the plume.  

Multiple sources of contamination have been identified since 1998. Source removal through soil vapor extraction has taken place at some facilities for the volatile contaminants under Consent Orders or Working Agreements. Other facilities continue to be monitored and/or evaluated through other ADEQ programs, most notably Hazardous Waste, and still other facilities have settled liability with ADEQ.

Status: ADEQ is in the process of sampling the far western toe of the groundwater plume for additional plume definition and confirmation of containment. Regular plume-wide groundwater monitoring and sampling is not currently being conducted and the existing well network and groundwater concentrations are being evaluated for focused future sampling efforts. Strategies for the next phase of WQARF, the Proposed Remedial Action Plan (PRAP), are currently being developed. 

Groundwater in the area is not used for drinking water purposes. The area is served by the city of Phoenix municipal water system or other regulated systems. If you own a private well, are using that well for drinking water, live within the site boundaries and have not had your well tested, please contact ADEQ.

Community Advisory Board (CAB): Formed but has not met on a regular basis since 2015.  Site progress will be presented to the public when more information is available.