The Centers for Disease Control and Prevention (CDC) intends to award a sole-source contract to iChrom Solutions dba Spark Holland for the procurement of the CHRONECT Symbiosis UHPLC System for fiscal year 2024. This procurement is essential for the Organic Analytical Toxicology Branch (OATB) to replace an outdated system currently used for analyzing human serum and urine samples for exposure assessment of polycyclic aromatic hydrocarbons (PAH), perfluoroalkyl substances (PFAS), and universal pesticides. The new Symbiosis system is critical for maintaining the laboratory's operational efficiency and ensuring the validity of analytical results, as it is the only system compatible with existing methods and capable of synchronizing with mass spectrometer data collection. Interested firms that believe they can meet the requirements are encouraged to submit their capabilities and supporting information to the Contracting Specialist by September 22, 2024, with any inquiries directed to Joselle Teran-Macaraeg at urv3@cdc.gov.