Agmt 2008 Wiss Janney Elstner Associates Inc

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EXHIBIT A SCOPE OF SERVICES The scope of services for this contract shall include a concrete forensic analysis of the following structures using nondestructive evaluation supplemented with detail laboratory examinations: 1. Sedimentation Basins & distribution boxes 2. Fixed film reactor concrete base & distribution boxes 3. Influent Pump Station wet wells & influent channels 4. Primary Clarifiers 1 & 2 5. Digester No. 1 6. Digester No. 2 7. #3 Clarifier Lift pump station 8. EBDA Effluent Boxes 9. Secondary (Final) Clarifiers 3 & 4 10. Chlorine Contact Tank The Consultant shall provide sufficient, in-house engineering staff knowledgeable in the evaluation of concrete structures, including visual inspection and laboratory testing. The project staffing will include five professionals for the field investigation, including the project manager. A minimum of three staff will be on site during the days of field investigation for recording observations of existing conditions. The Consultant will also provide laboratory staff for in-depth concrete evaluation, including petrographers for microscopic examination, chemists for chemical analyses, and support personnel for preparation and handling of samples. The first phase of the investigation will include a visual observation of the structures and the second phase will include laboratory testing of samples of the concrete from the structures. These phases are described below. Visual Observation -The Consultant will perform a visual survey of accessible areas of each of the structures to assess the condition of the concrete elements. For some of the structures access will be limited to the exterior of the structure due to on-going operations. Where interior access is possible, the Consultant will survey the accessible interior surfaces. During the visual surveys, the Consultant will document areas of cracks, spalls, and other surface anomalies. Locations suggesting leakage will be noted. As required, the Consultant will also employ various nondestructive methods to further study surface anomalies and to confirm as-built construction details such as location of reinforcing steel and member thickness. Nondestructive techniques commonly executed by the Consultant in the assessment of concrete structures may also be used and may include ground penetrating radar to detect embedded steel; impact-echo and ultrasonic pulse-velocity to detect subsurface voids or cracks; infrared thermography to detect leakage and near-surface defects; and half-cell potential or linear polarization testing to determine corrosion potential or corrosion rates, respectively. WPCP Concrete Forensic Analysis January 8, 2008 07-593-52-239 Page 15 of 18