2000-308 - Laserfiche WebLink

Home Browse Search

L 40 40 40 Contract #SD624AA For the NPDES Stormwater Compliance Report the Consultant shall model for the following parameters: • BOD • Total lead • Total zinc • Total coliform 3-C Interim Report (by Consultant)— DISTRICT will submit the results of the existing conditions SWMM modeling to the Consultant for preparation of a report. A technical interim report, summarizing model calibration and verification procedures and existing water quantity and water quality analysis shall be prepared and submitted to the Steering committee for review. Water quantity and water quality conditions and levels of service (LOS) under existing land use conditions shall be assessed. This assessment shall include application of the LOS criteria to identify those areas where the existing system does not include consideration of known drainage; flooding or water quality problems determined through the investigations and reconnaissance of Task 1 and 2. The 100 -year floodplain, based on existing use conditions, shall be delineated on the appropriate topographic maps and included as an overlay as COUNTY'S computer mapping system. Ten (10) copies of the report shall be submitted to COUNTY with additional copies provided to DISTRICT, IRFWCD, and the City of Vero Beach. The Steering committee shall work with the Consultant to prepare graphic displays identifying the basin, 100 -year floodplain, and problem areas for the public information meeting. The steering committee shall work with the Consultant to prepare a handout summarizing the results of the study. Task 4 — Evaluation of alternatives: 4-A Results from the previously completed SWMM model, outlined in the interim report from Task 3C, shall be used by the Steering committee to determine design alternatives for the regional stormwater improvements. Based on recommendations from the steering committee, DISTRICT will provide conceptual designs for the alternatives selected and model the alternatives with the developed SWMM model. . The Consultant shall provide supporting information and drafting assistance for the conceptual design. The supporting information may include survey information required for the conceptual design of the proposed alternatives. The SWIM modeling of the alternatives shall analyze each alternative's affect on hydraulic parameters (flow rates and flood stages) and water quality parameters. Expected reductions in pollutant loadings shall be calculated for each of the proposed alternatives. The alternatives shall also be modeled for future land use in the basin. Calculations shall take into account pollutant removal efficiencies of stormwater treatment facilities required for new developments under current stormwater treatment regulations. Development of the alternatives will follow the following guidelines. Gravity flow is first priority. However, pumping shall be utilized if pumping provides the most economical and effective alternative. Regional stormwater treatment systems will be Page 15 of 19