ASARCO Closed Through the Country's Largest Environmental Bankruptcy. The El Paso Trust Is $52 Million. The Asbestos Cohort Is Not in the Literature.

The ASARCO smelter in El Paso, Texas operated for more than 120 years. It processed copper, lead, and zinc ores from 1888 through closure ahead of the 2005 corporate bankruptcy. The 458-acre property sits in west central El Paso County, less than a mile from the University of Texas at El Paso and within sight of the international border with Ciudad Juárez. ASARCO LLC filed for Chapter 11 bankruptcy protection on August 9, 2005 in the United States Bankruptcy Court for the Southern District of Texas, Corpus Christi Division, Case No. 05-21207.

The bankruptcy resolved in November 2009 with the largest environmental settlement of its kind in United States history. The Second Amended Joint Plan of Reorganization was confirmed on November 13, 2009, with environmental cleanup obligations totaling 1.79 billion dollars across ASARCO operations nationwide. The United States Department of Justice press release characterized the resolution as “the largest environmental bankruptcy in U.S. history.” The El Paso property received over 52 million dollars in a custodial trust through a Consent Decree filed March 19, 2009 and approved by the court on June 5, 2009.

A Century-Long Operation

The El Paso smelter dates to 1888. Federal environmental records confirm continuous operation from that year. The plant’s copper, lead, and zinc processing supplied raw materials to industrial customers for the better part of the 20th century. Workforce composition shifted across the decades from largely manual labor through the early 20th century to a mix of skilled trades and operators in the post-World War II period.

The smelter sat in a neighborhood that grew up around it. The community of Smeltertown, on the west side of the property, was a residential settlement built directly adjacent to the smelter operation. Smeltertown was displaced in the 1970s following the discovery of elevated lead levels in children living in the surrounding area. The El Paso lead poisoning study, conducted by the Centers for Disease Control and El Paso city health authorities in the early 1970s, documented blood lead levels in children near the smelter and informed subsequent regulatory action on smelter emissions.

ASARCO suspended operations at the El Paso plant ahead of the 2005 Chapter 11 filing. Following the 2009 settlement and the formation of the custodial trust, the smelter and associated industrial structures were demolished. The property today is held by the trust pending final cleanup and reuse determinations.

The Bankruptcy Settlement

ASARCO LLC filed for Chapter 11 protection on August 9, 2005. The case was consolidated in the Southern District of Texas, Corpus Christi Division, under Case No. 05-21207. The bankruptcy resolved over four years and concluded with the Second Amended Joint Plan of Reorganization, confirmed by the bankruptcy court on November 13, 2009.

The 1.79 billion dollar environmental settlement covered cleanup obligations at multiple ASARCO sites across the western United States, including but not limited to the El Paso operation. The Department of Justice press release announcing the settlement described it as the largest environmental bankruptcy in United States history. The settlement was achieved through coordinated work among the United States Environmental Protection Agency, the United States Department of Justice, and state environmental agencies in the affected states.

The bankruptcy structure separated environmental obligations from asbestos personal injury claims. Asbestos personal injury claims were channeled to a Section 524(g) trust under 11 USC 524(g), the federal statute that allows companies with substantial asbestos liability to consolidate present and future personal injury claims into a single trust that survives the bankruptcy. The 524(g) trust handles claims separately from the environmental custodial trusts established for site cleanup.

The TCEQ Custodial Trust

The El Paso property is held in a custodial trust under the oversight of the Texas Commission on Environmental Quality, with the United States Environmental Protection Agency as a signatory. The trust was funded with over 52 million dollars through a Consent Decree filed March 19, 2009 in the federal bankruptcy court and approved by the court on June 5, 2009.

The custodial trust mechanism is distinct from the federal Superfund National Priorities List process. Federal Superfund cleanup proceeds under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) through a sequence of remedial investigation, feasibility study, and Record of Decision, with EPA as the lead agency for NPL sites. Custodial trust cleanup proceeds under bankruptcy court order, with the trustee performing cleanup work funded by the trust corpus and overseen by state and federal agencies.

The El Paso custodial trust governs site remediation work including soil remediation, demolition of remaining smelter infrastructure, and long-term institutional controls on the property. The TCEQ documentation of the site references the custodial trust structure and identifies the property as in active remediation.

The Negative DSHS Finding

The Texas Department of State Health Services conducted a cancer cluster assessment for west central El Paso County in 2017, examining cancer occurrence data from 2010 through 2014. The assessment was prompted by community concerns about cancer rates in the neighborhoods surrounding the former ASARCO property. The methodology followed the joint Centers for Disease Control and Council of State and Territorial Epidemiologists 2013 Guidelines for Investigating Suspected Cancer Clusters and the DSHS protocol updated January 15, 2016.

The assessment examined overall cancer incidence and reviewed kidney cancer concerns in particular. The DSHS investigation did not identify a statistically significant cancer cluster in west central El Paso County across the period examined. The investigation did not progress to steps 3 or 4 of the CDC/CSTE guidelines, which would involve additional epidemiologic analysis such as case-control studies or focused exposure assessment.

A negative cluster finding does not mean exposure did not occur. It means the methodology used by DSHS at the geographic and time-period scale examined did not detect cancer incidence above what would be statistically expected for a comparable Texas population. The assessment is one piece of the picture; it is not a comprehensive evaluation of every health outcome associated with the smelter operation, and it does not encompass mesothelioma specifically because mesothelioma incidence at the census tract scale is too sparse to support cluster methodology of the kind DSHS used.

The Cohort That Doesn’t Exist

A targeted search of PubMed and PubMed Central for a peer-reviewed mesothelioma or pleural disease cohort study of ASARCO smelter workers returns no matches. There is no dedicated published cohort that would inform a quantitative exposure assessment for the El Paso worker population.

This is itself the finding worth reporting. The closest analog cohorts in the occupational health literature are studies of shipyard workers, refinery workers, and asbestos manufacturing workers, not non-ferrous smelter workers. The Krstev et al. 2007 US Coast Guard shipyard cohort (Occupational and Environmental Medicine, PMID 17881470) followed 4,702 workers employed at the Baltimore Coast Guard yard from 1950 to 1964 and reported a standardized mortality ratio of 5.07 for mesothelioma overall and 6.27 for workers with 10 or more years of employment. The Sanden et al. 1992 European Respiratory Journal cohort study (PMID 1572439) followed 3,893 shipyard workers and found 11 observed pleural mesothelioma cases against 1.5 expected, a sevenfold elevation. These cohorts establish the asbestos-mesothelioma relationship in industrial trades.

Non-ferrous smelters used asbestos-containing materials extensively before the OSHA general industry asbestos standard (29 CFR 1910.1001) took effect in 1972. The standard industrial-asbestos applications of the era include thermal pipe insulation, boiler lagging, gaskets at flanged joints, fireproofing on structural steel, and equipment insulation on tanks, furnaces, dryers, and heat exchangers. The same applications used at refineries and shipyards were used at smelters. Worker categories at the El Paso smelter that would have direct asbestos exposure include insulators, pipefitters, boilermakers, electricians, maintenance crews, and laborers performing cleanup after insulation removal.

What remains absent is a published cohort that quantifies that exposure for the specific El Paso workforce.

The 750-Mile Drive

El Paso sits 750 miles by driving distance from the highest-volume mesothelioma clinical research program in Texas. The MD Anderson mesothelioma trial access gap investigation documents the geographic concentration of NCI-designated mesothelioma research in Texas and the driving distances families face from West Texas, the Panhandle, and the Permian Basin. El Paso is the furthest major Texas metro from the Houston cancer center.

For an El Paso family navigating a mesothelioma diagnosis, the geography compounds the medical complexity. Specialist consultation, surgical evaluation, and clinical trial access are concentrated in Houston. The Mays Cancer Center at UT Health San Antonio holds NCI Clinical Cancer Center designation and is the closest NCI center to El Paso, at approximately 550 miles. The Mays Cancer Center supports thoracic and pleural mesothelioma cases through its Lung Cancer Program, but the deepest mesothelioma trial portfolio in Texas sits at MD Anderson in Houston.

The geography is not separate from the cohort question. The same distances that constrain a worker’s access to a specialist consultation today constrain the formation of a research cohort that would document the worker population’s exposure history. The smelter operated for 120 years. The records of those workers, their occupational histories, and their health outcomes are dispersed across personal records, family papers, and the institutional memory of the former workforce. Building a cohort study at this point requires the kind of focused community-based research that the El Paso area has not yet seen for the ASARCO smelter population specifically.

What This Pattern Means

The federal court records of the closure are complete. The Second Amended Joint Plan of Reorganization is on the docket of the Southern District of Texas. The Consent Decree funding the El Paso custodial trust is on the same docket. The TCEQ trust documentation is on the agency’s website. The 2017 DSHS cancer cluster assessment is in the DSHS environmental epidemiology archive.

The medical and legal records of the closure exist. The workforce cohort study does not. That asymmetry is not an accident; it reflects which questions the federal Superfund and bankruptcy systems are designed to answer and which questions occupational epidemiology requires separate funding and effort to address.

For ASARCO El Paso workers and their families today, the practical avenues are the Section 524(g) asbestos trust for personal injury claims, the Texas Cancer Registry’s TxCanViz tool for state-level incidence context, and the broader trust fund landscape for workers with multi-site occupational exposure histories. The geographic constraint on specialist care remains, and the 750-mile distance to Houston is the same distance whether the diagnosis arrives in 2026 or in 2036.

The records will be there. The cohort study, for now, will not.