Specifications include, but are not limited to: (a) Contractor shall provide remediation services for TFC at various State-owned facilities and locations throughout Texas which include, but are not limited to, the following: (i) high and low rise commercial office buildings; (ii) warehouses; (iii) laboratories; (iv) parking structures; (v) child care facilities; and (vi) educational campuses. Contractor shall provide all, labor, materials, equipment, tools, and transportation required to perform these services. Services shall be available to TFC on an as needed basis, twenty four (24) hours a day, 365 days a year. (b) No work is guaranteed under this Contract. For each project under this Contract, the TFC Contract Administrator, as defined in Section 1.02 below, will contact Contractor for an estimate. As time permits, Contractor will proceed with the work under the project only after the estimate is approved by the TFC Contract Administrator through the issuance of a Purchase Order (hereinafter referred to as a “Purchase Order”). Work performed without a Purchase Order will not be paid. (c) In the event of an emergency service call, Contractor may proceed with the work upon a verbal approval from TFC Contract Administrator. Written confirmation will be provided within twenty four (24) hours of such authorization. (d) Each Purchase Order will be subject to the terms and conditions set forth in this Contract, and shall include a description of the project, scope of services, schedule and term, and compensation specific to the Purchase Order which shall be negotiated at the time of such Purchase Order. (e) Contractor shall respond to the initial request of the TFC Contract Administrator within fifteen (15) minutes of initial call, and arrive on-site within twenty four (24) hours, or within two (2) hours for emergencies.