About the Site

About the Site

New soil cap covering installed after soil replacement in April 2016.

The Southern Pacific Railroad began clean-up efforts at the Houston Wood Preserving Works after wood treating operations ended at 4910 Liberty Road in Houston in 1984. The work was conducted under a U.S. Environmental Protection Agency (EPA) cleanup program, which was supervised by the Texas Commission on Environmental Quality (TCEQ). Union Pacific continued cleanup activities after merging with Southern Pacific under the same EPA program.

Scientists, engineers and other experts have conducted environmental studies, assessments and cleanup work at this location for 30 years, with input and supervision from state and federal regulatory authorities. Work has focused on determining if there are potential exposure pathways to people near the site. Test results do not show impacted soil or groundwater exposure to residents.

Vapor Intrusion Assessment Reports

2019 Jul – Response to TCEQ VI Comments

2019 Dec – UPRR Soil VI Work Plan

2019 Dec – TCEQ Comment Letter on VI Work Plan

2020 Jan – Soil VI Work Plan

2020 Jan – TCEQ Comment Letter to VI Work Plan

2020 Jan – Updated Soil VI Work Plan

2020 Mar – Soil VI Assessment Report

2020 Apr – TCEQ Letter on VI Report

2020 May – Updated Soil VI Assessment Report

2020 May – TCEQ Letter on Additional VI Assessment

2020 Aug – Updated Soil VI Assessment Report

2020 Aug – Supplemental Soil VI Assessment Plan

2020 Dec – Updated Soil VI Assessment Report

Monthly / Annual Cap Updates

2020 Jan – Monthly Update – Concrete Cap Insp.

2020 Feb – Monthly Status Update – Caps Insp.

2020 Mar – Monthly Status Update – Caps Insp.

2020 Apr – Monthly Status Update – Caps Insp.

2020 May – Monthly Status Update – Caps Insp.

2020 Jun – Monthly Status Update – Caps Insp.

2020 Jul – Monthly Status Update – Caps Insp.

2020 Aug – Monthly Status Update – Caps Insp.

2020 Sept – Monthly Status Update – Caps Insp.

2020 Oct – Monthly Status Update – Caps Insp.

2020 Nov – Monthly Status Update – Caps Insp.

2020 Dec – Monthly Status Update – Caps Insp.

2021 Jan – Monthly Status Update – Caps Insp.

2021 Feb – Monthly Status Update – Caps Insp.

2021 Mar – Monthly Status Update – Caps Insp.

2021 Apr – Monthly Status Update – Caps Insp.

2021 May – Monthly Status Update – Caps Insp.

2019 PRACR

2020 PRACR