The Department of the Interior, specifically the U.S. Geological Survey (USGS), is seeking qualified firms for a potential contract focused on microplastics analyses as part of a study on urban storm runoff's impact on the Rio Grande. The objective is to identify and analyze microplastics in water, sediment, and air media, requiring an experienced, ISO-certified laboratory capable of adhering to specialized processing and analysis techniques. This investigation is crucial for understanding the contributions of microplastics from storm drain outfalls and assessing the effectiveness of planned upgrades to stormwater management systems in Bernalillo County. Interested firms must submit their qualifications, including business size classification and contact information, by 9 AM Eastern Time on September 9, 2024, to Sean M. Jones at smjones@usgs.gov, as this is a sources sought notice for market research purposes only.