TIC 2020-07-20 Item 2E - Agreement - NPDES Phase II Permit with Otak Inc

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City iJy of % I kwflf A Ilan Ekberg, o Public Works Department -- Henry Hash, Director INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Committee FROM: Henry Hash, Public Works Director BY: Greg Villanueva, NPDES Coordinator CC: Mayor Ekberg DATE: July 17, 2020 SUBJECT: NPDES Phase II Permit 2019-2024 Project No. 99341210 Consultant Selection and Agreement ISSUE Approve a contract with Otak Inc. to assist the City with additional NPDES Phase II Permit requirements. BACKGROUND The latest NPDES Phase II Permit was issued to the City on July 1, 2019. This permit has additional requirements that the City must meet, including new Municipal Separate Storm Sewer System (MS4) Mapping and Documentation requirements. This includes relabeling mapped infrastructure to comply with Department of Ecology (DOE) requirements so that mapping nomenclature is consistent across the region. Other requirements include developing and implementing a prioritization method and process to determine which receiving waters will benefit the most from stormwater retrofits. DISCUSSION The current MRSC Consultant Roster was reviewed, and three firms were short-listed to provide consultant services. The firms were KPG, Otak, and David Evans. The Summary of Qualifications for NPDES and GIS mapping were evaluated for each firm and Otak was selected as the firm that best met the requirements of the project. Staff met with Otak and developed a scope of work that includes: a GIS analysis of the existing drainage system, providing an updated delineation map of areas that do not discharge to surface waters and drainage areas tributary to each outfall 24-inch diameter or greater; developing a list of GIS datasets that need to be updated or created and provide a schema for each, performing a receiving Water Conditions Assessment, and providing related MS4 supporting documents. FISCAL IMPACT The cost for the Otak consultant service is $55,602.00 and will be paid from the Ecology 2019-2021 Municipal Stormwater Capacity Grant funds the City was awarded. No City funding is required. RECOMMENDATION Council is being asked to approve a consultant agreement with Otak Inc. and consider this item on the Consent Agenda at the August 3, 2020 Regular Meeting. Attachment: Consultant Agreement Proposal Rating https:#tukwilawa.sharepoint.com/sites/publicworks/engineering/PW Drop Box/01 TIC Agenda/Agenda Items/TIC 07-20-2020/5. NPDES Phase II Permit Consul tan t Con tract/I nfo Memo NPDES Phase II Permit .a.docx 39