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American Zinc

This former zinc smelter in Dumas, Moore County is being addressed under the State Superfund Program.

Site Background

The American Zinc site is located near the city of Dumas, approximately 3.5 miles north on U.S. 287 and 5 miles east on Farm Road 119. The site was operated as a zinc smelter from the late 1930s until the late 1960s or early 1970s, generating heavy metal waste typical to that process. During World War II and for the major part of its lifetime, the smelting plant was a source of zinc in the United States' defense program. The abandoned smelting plant has been decommissioned since 1957. Numerous slag piles have been deposited in, around, and across the intermittent South Palo Duro Creek. The slag material apparently was also used throughout the site as road base. In November 1987, the Texas Water Commission collected samples from various locations around the site, including the creek. Analysis showed significant contamination from lead and cadmium.

Superfund Actions Taken to Date

  • October 15, 1993, a legal notice was published in the Texas Register (18 TexReg 7201-7202) describing the site, proposing the site to the state Superfund registry, and announcing that a public meeting to receive citizen comments would be held at the city hall in Dumas on November 16, 1993.
  • July 13, 1995, effective date of an agreed order signed by the potentially responsible parties to determine the nature and extent of contamination (remedial investigation / feasibility study).
  • June 27, 1996, remedial investigation / feasibility study under way.
  • March 25, 1998, remedial investigation report approved by TNRCC.
  • October 5, 1998, remedial investigation addendum workplan approved.
  • May 14, 1999, TNRCC approved the remedial investigation report on additional field work and discussed site activities.
  • June 15, 1999, an updated copy of the community relations plan was added to the official documents available for public viewing at the Kilgore Memorial Library and at the TCEQ Records Management Center.
  • July 1, 1999, a legal notice was published in the Moore County News Press announcing a public meeting would be held August 5, 1999, at Dumas City Hall to present to the community a proposed nonresidential land use for the site and to receive citizen comments. Determination of land use may impact the remedial action proposed for the site.
  • July 2, 1999, a legal notice was published in the Texas Register (24 TexReg 5068-5069) announcing a public meeting would be held August 5, 1999, at Dumas City Hall to present to the community a proposed nonresidential land use for the site and to receive citizen comments. Determination of land use may impact the remedial action proposed for the site.
  • August 5, 1999, a public meeting was held at the Dumas City Hall to receive community comments on the proposal of commercial/industrial land use specifications for remediation of the site contamination. The nonresidential use of the land may be considered in any remedial action proposed for the site.
  • June 9, 2000, potentially responsible party respondents met with TNRCC to discuss additional field efforts to satisfy terms of the agreed order.
  • December 15, 2000, the consultant for the potentially responsible parties submitted a September 12, 2000, paper to TNRCC for evaluation and comment. Ecological and toxicological specialists in the TNRCC Technical Support section were evaluating the acceptability of the paper's findings on allowable dietary levels of cadmium and derivation of allowable cadmium soil concentrations for horses and livestock.
  • July 5, 2001, TNRCC submitted comments back to the consultant for the September 12, 2000 paper listing some concerns and ecological issues that still needed to be addressed.
  • May 6, 2002, the TNRCC sent a letter to the consultant with additional comments on the outstanding ecological risk assessment issues and requesting an ecological risk assessment.
  • July 29, 2002, TNRCC received the respondent's ecological assessment work plan.
  • September 1, 2002, effective date of the name change from Texas Natural Resource Conservation Commission (TNRCC) to Texas Commission on Environmental Quality (TCEQ).
  • September 26, 2002, TCEQ reviewed the respondent's ecological assessment work, and returned it with comments.
  • October 16, 2002, TCEQ met with the respondent's consultant at the site to note and discuss ecological receptors and additional requirements for the ecological assessment work plan.
  • November 18, 2002, TCEQ received the revised ecological assessment work plan.
  • March 13, 2003, TCEQ approved the February 28, 2003, addendum to the revised site-specific ecological risk assessment work plan. The final revised site-specific ecological risk assessment work plan is expected to be sent to TCEQ in May for review.
  • January 12, 2004, the TCEQ approved the revised site specific ecological risk assessment from the consultant to the potentially responsible party.
  • March 10, 2004, the TCEQ approved the remediation standards notice submitted by the respondents.
  • February 1, 2006, the preliminary description of remedial alternatives was received and reviewed. TCEQ comments were sent back to the consultant.
  • September 18, 2006, the description of remedial alternatives that incorporated TCEQ comments was approved.
  • December 27, 2006, the remedial action plan was submitted by the consultant for TCEQ review.
  • October 11, 2007, the Proposed Remedial Action Document (PRAD) was finalized.
  • November 9, 2007, a legal notice Exit TCEQ Site was published in the Texas Register (32 TexReg 8190-8191) announcing a public meeting would be held December 13, 2007, at Dumas City Hall to present to the community information on a proposed remedy for the site and to receive citizen comments.
  • December 13, 2007, a public meeting was held at the Dumas City Hall to receive community comments on the proposed remedy for the site. The proposed remedy for the source property is consolidation, capping and institutional controls. For the non-source property, the proposed remedy is institutional controls, soil treatment or other appropriate methods for addressing the affected surface soils. The American Zinc State Superfund Map was presented at the public meeting to illustrate the affected areas on the source and non-source properties which require remediation.
  • January 31, 2008, the Remedial Selection Document was finalized.
  • February 27, 2008, TCEQ mailed letters to the Potentially Responsible Parties to inform them of the selected remedial action for the site and to offer the Potentially Responsible Parties the opportunity to make a Good Faith Offer to fully fund or conduct the remedial design/remedial action for the site. The letters included the Remedial Selection Document as an enclosure.
  • April 3, 2008, TCEQ mailed out letters to the Potentially Responsible Parties, inviting them to attend a meeting at TCEQ's main campus on April 17, 2008 to provide the Potentially Responsible Parties with the opportunity to discuss the site.
  • April 17, 2008, A meeting was held at TCEQ's main campus to allow Potentially Responsible Parties the opportunity to discuss the site.
  • January 29, 2010, Final Administrative Order issued.
  • April 2010, Design Concept Memorandum approved. A Design Concept Memorandum describes the remedial action in general terms, and identifies and documents significant decision items which form the basis for the final remedial design.
  • December 2, 2010, the Post Closure Care Plan was approved.
  • March 29, 2011, the 100% Design Specifications, including the Field Sampling Plan, was approved.
  • June 2011, The Field Sampling Plan Amendment, to include treatment of a portion of the affected off-site soil, was approved.
  • May 28, 2012, the remedial action field activities were initiated.
  • June 6, 2012, the TCEQ conducted the remedial action substantial completion inspection.
  • June 29, 2012, the remedial action field activities were completed.

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Site Specific Information

EPA ID : TXD982813743
Location : Dumas, Moore County
Site Status : Evaluation Under Way
Type of Facility : Zinc Smelter
Category : Listed on Registry
Media Affected : Soil
Latitude : 35º56'39"N
Longitude : -101º55'59"W
Hazard Ranking Score (HRS) : 15.21
Contaminants at time of HRS : Arsenic, Cadmium, Lead, Zinc
TCEQ Region : Amarillo - 1
Funded by : Potentially Responsible Parties

Contact Information

Superfund Project Manager
Kandice Spera
512-239-2263 or 1-800-633-9363
E-mailsuperfnd@tceq.texas.gov

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

Records Repositories

Kilgore Memorial Library
124 South Bliss Avenue
Dumas TX  78113
806/935-4941

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