LOCAL LIMITS STUDY FOR 91ST AVENUE AND 23RD AVENUE WASTEWATER TREATMENT PLANTS - ENGINEERING SERVICES

The City of Phoenix is seeking a qualified consultant team to provide engineering services for a Local Limits Study for the 91st Avenue and 23rd Avenue Wastewater Treatment Plants. The project involves evaluating and recommending industrial wastewater pre-treatment pollutant limits (local limits) for the treatment plants. The scope of work includes reviewing previous assessments, identifying pollutants of concern, developing additional local limits, and verifying existing Maximum Allowable Headworks Loading (MAHL) calculations. The selected consultant will perform tasks such as reviewing historical upsets, identifying significant changes at the treatment plants, and developing technically valid methods for controlling pollutants. • The project requires a detailed evaluation and development of local limits for the treatment plants. • The consultant will work with City staff to develop and implement a sampling plan, if existing data is insufficient. • The consultant will prepare a draft report for review and present it to the City and the Subregional Operating Group (SROG). • The consultant will coordinate with City staff as needed and maintain all project records in electronic format.