Onterris Laboratories, LLC

Enthalpy Analytical, LLC, operating as Enthalpy Specialty Labs, is a for-profit limited liability company headquartered in Durham, North Carolina that provides specialized analytical laboratory services to the federal government. The firm has established itself as a critical resource for environmental testing, contaminant analysis, and laboratory diagnostic services, with particular expertise in per- and polyfluoroalkyl substances (PFAS) testing and comprehensive sample analysis across multiple scientific domains. Since registering with SAM.gov in April 2004, Enthalpy Analytical has developed extensive experience executing both prime and subcontracted federal awards across multiple agencies and has maintained an active SAM registration through October 2026.

Enthalpy Analytical has demonstrated substantial prime contract work with federal agencies, including the Centers for Disease Control and Prevention and the U.S. Department of State's Bureau of African Affairs. Prime contract awards include a $41,976 firm fixed price purchase order from CDC Pittsburgh for PFAS analysis of skin, lung, spleen, and liver samples collected from mice exposed to individual PFAS chemicals, completed in December 2023; a $30,150 purchase order from CDC Pittsburgh for PFAS analysis of mouse serum and urine completed in May 2022; a $51,750 purchase order from CDC Pittsburgh for general laboratory testing services under the EPA's Combined Analytical Services Contracts (CASC) program, for which Enthalpy holds an Indefinite Delivery Contract valued at $5,916,780; and a $9,576.20 firm fixed price purchase order from the Department of State's Bureau of African Affairs awarded in December 2025 for drinking water testing services to be performed in Senegal. None of these prime contracts utilized set-aside designations. Additionally, Enthalpy Analytical appears as a subcontractor on numerous federal contracts with prime contractors including Ch2M Hill, Inc., Trevet-Noreas JV LLC, CDM Federal Programs Corporation, Weston Solutions Inc., Research Triangle Institute, Amentum Technology, Inc., Tetra Tech, Inc., and others, providing analytical laboratory services, testing laboratory services, sample processing, PFAS analysis, and bioassay analysis from 2021 through August 2025.

Enthalpy Analytical has participated in federal grant awards primarily through subcontracting arrangements. A notable subgrant award dated May 15, 2024, was issued under the New Hampshire Department of Environmental Services as prime grantee, leveraging funding from the Bipartisan Infrastructure Law (P.L. 117-58), specifically the Environmental Protection Agency's Emerging Contaminants-Small or Disadvantaged Communities (EC-SDC) Grant Program. Under this subgrant, Enthalpy Analytical provided laboratory analytical services to identify and quantify analytes including PFAS, volatile organic compounds, semi-volatile organic compounds, pesticides and herbicides, pharmaceuticals and personal care products, metals, and inorganic constituents from various environmental and non-environmental sample matrices in support of source water protection sampling initiatives for PFAS in drinking water. This award reflects Enthalpy's alignment with federal priorities around emerging contaminants and drinking water safety under the Bipartisan Infrastructure Law's $50 billion investment to strengthen the nation's drinking water and wastewater systems.

Enthalpy Analytical holds a Chemical Analytical Services Master Blanket Purchase Agreement with the Engineer Research and Development Center, a defense agency component, valued at $1,376,275.45 with a performance period extending through September 29, 2030. This multiple-award indefinite delivery vehicle, established on September 30, 2025, enables the Engineer Research and Development Center to issue individual task orders for comprehensive analytical laboratory services on an as-needed basis. Under this IDV, Enthalpy provides environmental contaminant analysis, toxicological research, and specialized laboratory diagnostic services with particular emphasis on PFAS analysis and environmental sample testing. The indefinite delivery structure with pre-negotiated terms and pricing leverages the contractor's demonstrated competency in executing similar work for federal agencies including the Centers for Disease Control and Prevention, Environmental Protection Agency, and Department of Health and Human Services. The multiple-award designation allows the awarding agency flexibility in procuring analytical services while maintaining a relationship with a qualified federal contractor experienced in government laboratory service delivery.