Title
Resolution for Approval of Amendment No. 2 to the Professional Services Agreement with LG Design, Inc., for Professional Engineering Services for the Water Treatment Plant UV Disinfection System Project ITB No. 4568 ($53,920.00)
Memorandum
This memorandum and resolution requests approval of Amendment No. 2 to the Professional Services Agreement with LG Design, Inc. (formerly known as CH2M and a wholly owned subsidiary of Jacobs Engineering, Inc.) for the Water Treatment Plant UV Disinfection System Project, ITB No. 4568 ($53,920.00).
In June 2017, the Michigan Department of Environment, Great Lakes and Energy (EGLE), formerly MDEQ, notified the City of Ann Arbor (City) that their drinking water supply contained levels of Cryptosporidium (a waterborne parasite) that require additional protection to comply with the EPA Long-term 2 Enhanced Surface Water Treatment Rule (LT2) drinking-water regulations. The City hired LG Design, Inc. to perform a study to evaluate alternatives for compliance with the LT2 drinking water regulations, which resulted in the recommendation for implementation of ultraviolet (UV) light disinfection. The goal of this project is to comply with the EGLE June 2020 deadline for additional Cryptosporidium protection. LG Design, Inc.'s original scope included preliminary investigation, detailed design, construction document preparation, bid phase assistance, and construction phase engineering services.
With the addition of UV disinfection, the City must demonstrate removal, or inactivation, of Cryptosporidium to comply with the LT2 drinking water regulations. New disinfection calculations, as well as regulatory compliance forms for tracking treatment system performance and monthly reporting to EGLE, will be developed specifically for the new UV disinfection system, and other disinfection processes including ozone and chloramination.
LG Design, Inc. is uniquely positioned to successfully execute the additional tasks associated with CT c...
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