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WQARF | 20th St & Factor Ave - Overview


20th Street and Factor Avenue | Overview

Revised On: Jan. 8, 2024 - 4:00 p.m.

Registry placement date: March 30, 2000

Score: 31

County: Yuma


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

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), 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 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. The cap has been inspected yearly since installation.

The Record of Decision was signed for the Site in 2018, and active remediation has been ongoing at the Site since then.


The remedy for the site is being implemented in accordance with the approved Record of Decision. The remedy includes in-situ enhanced reductive dechlorination, monitored natural attenuation, and maintenance of the asphalt cap.

Community Advisory Board (CAB)

Dissolved | View/Download Community Involvement Plan >