This is modification 02 to the synopsis entitled Environmental Compliance and Operations 2 (ECO2) - NNJ17609194L Pre-Solicitation Conference - WSTF Site Tour and One-on-Ones which was posted on May 12, 2017. You are notified the following changes are made: Posting of Interested Parties List. It is the potential offeror's responsibility to monitor this website for updates. Information concerning the ECO2 procurement may be viewed at the following website: https://procurement.jsc.nasa.gov/eco2 / and https://fbo.gov This announcement is for information and planning purposes only and does not constitute an RFP. Requests for a solicitation will not receive a response. No reimbursement will be made for any costs associated with providing information in response to this announcement and any follow-up information requested. No basis for claim against the Government shall arise as a result of a response to this announcement or Government use of any information provided. This announcement does not restrict the Government's right to consider acquisition strategies as deemed appropriate.