Registry Placement Date: Sept. 16, 2021

Score: 46

County: Mohave

Location

The site investigation area is in Lake Havasu City, generally bound by Industrial Boulevard to the north, El Camino Drive to the south, the Orion Lane alignment to the east, and Lake Havasu 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), thallium and arsenic

Action Taken

From 2001 to 2004, the United States Environmental Protection Agency (EPA) discovered soil, soil gas and groundwater contaminated with volatile organic compounds (VOCs) and heavy metal(s) near the northwest corner of Lake Havasu Avenue and Bahama Avenue.

From 2019 to 2020, ADEQ conducted a Preliminary Investigation (PI) near that location which confirmed the presence of PCE, TCE and thallium in the groundwater above their respective Arizona Aquifer Water Quality Standards (AWQS). The maximum concentration of PCE detected was 5.82 micrograms per liter (µg/L), TCE was 2,650 µg/L and thallium was 5.08 µg/L. Soil sampling indicated the presence of arsenic above Arizona Soil Remediation Levels (SRLs), with a maximum concentration detected at 17.2 milligrams per kilogram (mg/kg). Based upon this data, the site was recommended for listing on the WQARF Site Registry.

After listing the site on the WQARF Registry in September 2021, ADEQ has installed and sampled multiple monitoring wells to define the extent of groundwater contamination, and collected soil and soil-gas samples to try to determine where the contamination may be coming from. ADEQ is also collecting samples to determine if there are current or potential future exposure routes at the site.

Groundwater results from June 2022 show TCE concentrations continue to be above AWQS at a maximum of 2,250 µg/L, and PCE continues above AWQS at a maximum of 15 µg/L. Arsenic and thallium were not detected in the soil above their SRLs in any samples collected since site listing. 

No site contaminants were detected in water sampled just offshore in Lake Havasu.

Status

Remedial Investigation activities including well installations, groundwater, soil, and soil-gas sampling are continuing at the site.

Community Advisory Board (CAB)

A community involvement area has been established and ADEQ is in the process of forming a Community Advisory Board (CAB). If you are interested in serving on the CAB for this site, please contact the Community Involvement Coordinator. More information is available in the Community Involvement Plan (CIP) | View CIP >