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Niagara Chemical

Cleanup of this former pesticide plant in Harlingen, Cameron County is complete. Releases at the site contaminated the groundwater and soil at the site with arsenic, lead and pesticides.

Site Summary
The Niagara Chemical site occupies 2 acres west of the intersection of Commerce Street and Adams Avenue near downtown Harlingen. Liquid and dry pesticides were formulated at the plant from 1946 to 1962, and pesticide blending and storage continued until 1968.

The plant was shut down and the buildings were razed in 1970, leaving only concrete slab foundations on the site. Three 10,000-gallon underground storage tanks were removed before the TCEQ began remedial investigations.

Superfund Registry and Investigation
On January 16, 1987, the Niagara Chemicals site became one of ten listed on the  state Superfund registry. In 1987, the TCEQ entered into an agreed order with potentially responsible parties (PRPs) to conduct the remedial investigation and feasibility study.

During the remedial investigation, soil and groundwater at the site were found to be contaminated with arsenic and organochlorine pesticides at concentrations requiring remedial action.

Remedial Action
In 1996, the TCEQ entered into another agreed order with the PRPs to conduct the remedial design and remedial action. The selected remedy consisted of removing and disposing of contaminated soils off-site and monitoring for chemicals of concern in groundwater.

The soil remedial action was completed in 1998. The PRP continued monitoring until groundwater conditions achieved the objectives set forth in the 1996 agreed order. The TCEQ deleted the site from the state Superfund registry in September 2013.

Current Status
Cleanup is complete. The site needs no additional state Superfund environmental response actions.

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Site Specific Information

Type of Facility: Pesticide formulation
Location: Harlingen, Cameron County
Latitude: 26.196256°
Longitude: -97.701806°
Site Phase: Cleanup complete
State Superfund Registry Status: Deleted from registry
Media Affected: Groundwater, soil
TCEQ Region: Harlingen - 15
Funded by: Potentially responsible parties

Contact Information
Superfund Project Manager
Jeffrey Patterson
512-239-2489 or 1-800-633-9363
E-mail: superfnd@tceq.texas.gov

Superfund Community Relations Liaison
Crystal Taylor
512-239-3844 or 1-800-633-9363
E-mail: superfnd@tceq.texas.gov

Records Repositories
TCEQ Central File Room
12100 Park 35 Circle Building E,
First Floor Room 103
Austin, TX 78753
512-239-2900
512-239-1850 (fax)
cfrreq@tceq.texas.gov