Conduct an environmental site assessment for Taxiway B. The Phase I assessments under this contract must be in compliance with the most up to date ASTM standard at the time of the request or as directed by the requestor (ASTM E1527-13 and/or ASTM E1527-21). Throughout the duration of the contract, scopes of work for Phase I & Phase II environmental site assessments & a generic Phase III environmental assessment scope will be provided prior to contract execution. Phase III ESA scopes will always be project specific and detailed scopes will be generated at the time it is determined a Phase III is needed. Each responding firm must demonstrate a capability to successfully complete the Phase I and Phase II assessment scopes of services, and must identify the types of subconsultants, if any, to be used. Firms must also describe their experience with Phase III environmental assessments. Other environmental tasks requested may require additional descriptions of qualifications on an as-needed basis. The firm shall provide services in other environmental investigations and tasks as directed by the Transportation Department Airport Division.