20th Street and Factor Avenue

Registry placement date: March 30, 2000

Score: 31

County: Yuma

Location: Yuma, approximately bounded by 17th Street to the north, 21st Street to the south, Kennedy Lane to the east and Fourth Avenue to the west

Contaminants of concern: Tetrachloroethene (PCE), trichloroethene (TCE), 1,1-dichloroethene (1,1-DCE) and cyanide 

Action taken: In 2002, ADEQ conducted a soil removal action and cleaned out sumps and septic tanks at an active facility as part of an early response action (ERA). A soil vapor investigation was initiated in 2008, and vapor monitoring is ongoing.

In February 2013, three additional monitor wells were installed to complete the definition of the site’s groundwater plume downgradient. Groundwater monitoring activities are ongoing, and no drinking water wells have been impacted.

In February 2014, ADEQ completed the installation of a permanent asphalt-based engineered cap. The cap was placed over the cyanide-impacted soils still remaining at a depth below 1 foot at the site.

Status: The final remedial investigation (RI) report was completed in June 2014, the feasibility study (FS) work plan was completed in November 2014, and the FS report was completed in August 2016. The Proposed Remedial Action Plan (PRAP) was completed in June 2017 and issued for public review and comment. The proposed remedy for the site is monitoring and maintenance of the engineered asphaltic concrete cap and in situ enhanced reductive de-chlorination (ERD) with monitored natural attenuation (MNA).

Community Advisory Board (CAB): Established and meets on a regular basis