This opportunity is a single-award IDIQ contract with fixed-price task orders for isotope analysis support to the Global Monitoring Laboratory in Boulder, CO. The solicitation has been amended to include government answers to industry questions, and acknowledgment of the amendment is required with the quote submission. Performance will take place in Boulder, Colorado, as specified for the GML location. No specific budget amount or non-bid timeline is mentioned in the description. The contract is not set aside for small businesses.