Professional Services Agreement - Arcadis US - WWTP Stress Testing Evaluation

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This is EXHIBIT A, consisting of 7 pages, referred to in and part of the Agreement between Owner and Engineer for Professional Services dated , Engineer's Services Article I of the Agreement is supplemented to include the following agreement of the parties. Engineer shall provide Basic and Additional Services as set forth below. PART I — BASIC SERVICES The City of South Bend's Wastewater Treatment Plant (WWTP) has a permitted average flow of 48 mgd and peak flow of 77 mgd. Arcadis completed the 2013 WWTP Facilities Plan Update to determine the WWTP improvements required to achieve an increased peak flow of 100 mgd as required by the City's CSO Long -Term Control Plan (LTCP). The City is in the process of reassessing their CSO LTCP in hopes to reduce the overall cost burden on residents. As part of this ongoing reassessment, a desirable alternative is to maintain the plant's current permitted 77 mgd peak flow or make minor, cost-effective improvements to increase the peak flow beyond 77 mgd but less than the previous 100 mgd. The WWTP Secondary Treatment Improvements project led by Arcadis entailed several significant improvements identified in the 2013 WWTP Facilities Plan Update including but not limited to rehabilitating Final Clarifier Nos. 6 and 7, providing a new direct RAS piping connection into the aeration tanks, and providing a new Aeration Effluent Channel. These improvements have allowed the plant to operate at reduced RAS rates and will alleviate the most limiting secondary treatment hydraulic bottleneck between the aeration tanks and secondary clarifiers. Construction is substantially complete for Final Clarifier Nos. 6 and 7, and is planned to be substantially complete for the remaining project areas by December 2017. The City desires to better understand and maximize the peak flow capacity of the WWTP with these improvements in place, which is the focus of this project. Note that the focus is also only on the liquid stream of the plant; the solid stream will not be evaluated. Arcadis will work closely with the City to perform stress testing of the WWTP and develop optimization strategies to determine reliable peak flow capacity based on the current plant facilities including the WWTP Secondary Treatment Improvements. This assumes that the existing Headworks facilities will be utilized as -is and that the Disinfection facilities will require expansion beyond 77 mgd (because the existing chlorine contact tanks are limited to 77 mgd to provide the required 15-minute contact time). We will determine the remaining 2013 WWTP Facilities Plan Update needs within primary and secondary treatment, and any new hydraulic needs that may result from using the existing Headworks facilities only. INFORMATION PROVIDED BY CLIENT Client will provide the following information during the assignment: 1. Plant's monthly report of operations data for past five years. 2. Updated standard operating procedures, if applicable. 3. Other pertinent reports and data. Page r (Exhibit A —Engineer's Services) EJCDC E-500 Agreement Between Owner and Engineer for Professional Services Copyright D 2008 National Society of Professional Engineers for EJCDC. All rights reserved.