The Joplin Union Depot is located at 205 North Main Street in Joplin, Jasper County, Missouri and includes one 2-story former railroad depot structure encompassing approximately 23,816 square feet, on an approximately 3.6-acre parcel. The Missouri Department of Natural Resources (MDNR) owns the property, and wishes to redevelop the former railroad depot structure. A Targeted Brownfields Assessment was requested by MDNR on behalf of Main Street Joplin "doing business as" (DBA) Downtown Joplin Alliance and approved by the U.S. Environmental Protection Agency Region 7 Brownfields Program. Specific details regarding future re-use were unavailable as of March 2024. Currently, the property hosts the vacant former railroad depot as well as an active communications tower and associated compound for the Kansas City Southern railroad. Historical documentation indicates that the property was undeveloped until approximately 1900, when multiple dwellings and a junkyard were developed. Construction of the railroad depot structure occurred sometime between 1900 and 1911. The property is bounded to the north by Simpson Sheet Metal, with Becton Avenue and commercial properties beyond; to the east by Becton Avenue, with Joplin Union Depot Company railroad tracks, Joplin Creek, and residential properties beyond; to the south by 1st Street, with John and Dave's Automotive, Dollar General, and other commercial properties beyond; and to the west by Commercial Gasket & Packing Company and a post office, with Main Street, commercial properties, and residential properties beyond. The former railroad depot is accessible from the east via Becton Avenue, and from the west via Main Street. The exterior of the former railroad depot is comprised of concrete; roofing materials are unknown due to limited access. The interior of the former railroad depot are finished with concrete walls, ceilings, and floors. Some remnant plaster is present on walls and ceilings; however, the concrete is bare in most areas. The stairway to the second floor was sealed-off and inaccessible due to structural concerns and was unable to be observed during an April 2023 Phase I Environmental Site Assessment (ESA). In April 2023, a Phase I ESA was performed at the property at identified multiple Recognized Environmental Conditions and Vapor Encroachment Conditions related to current and historical railroad activity at the property; historical mining operations in the regional area; close-proximity petroleum-related concerns; and close-proximity upgradient dry-cleaning and printing facilities. One Business Environmental Concerns was identified regarding the potential presence of asbestos-containing material (ACM) and lead-based paint (LPB) in building materials due to the age of the former railroad depot structure. In October 2023, a Phase II ESA was performed at the property and revealed heavy metals (cadmium, cobalt, and lead) contamination exceeding regulatory benchmarks and the U.S. Geological Survey average background concentration for Jasper County in soil. Heavy metals (arsenic, beryllium, cadmium, chromium, cobalt, iron, lead, manganese, zinc, and mercury) contamination exceeding regulatory benchmarks was detected in groundwater; some portion of these detected heavy metals collected in groundwater samples are expected to derive from suspended sediment rather than from groundwater. Volatile organic compounds (benzene) were detected in soil-gas samples exceeding regulatory benchmarks. Approximately 1,250 square-feet of ACM as black roof flashing was identified. Approximately 38,633 square feet and 64 linear feet of LBP was identified throughout the former railroad depot, including door frames, decorative trim, columns, door trim, walls, stair railings, window frames, windows, and ceilings. In March, 2024, an Analysis of Brownfields Cleanup Alternatives was performed for the property and recommended the abatement and proper off-site disposal of ACM and LBP. A soil management plan