The US Environmental Protection Agency (EPA) is conducting market research for specialized selenium speciation analytical laboratory services for environmental samples from the Ballard Mine Superfund Site. Required matrices may include water, sediment/soil, and plant tissue, with a focus on achieving aqueous detection capabilities of 4 ng/L. This is a Request for Information for market research and acquisition planning purposes only, not a solicitation. No budget amounts or performance location beyond the Ballard Mine Superfund Site are specified. No submission timelines are provided.