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CC - CONSENT ITEM: Approval of a Professional Services Agreement with CWE for the Transfer Station Stormwater Diversion Upgrades in an Amount Not-to-Exceed $129,500.
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Meeting Date: December 9, 2024
Contact Person/Dept.: Javier De La Cruz/Public Works Environmental Programs & Operations Division
Phone Number: (310) 253-6421
Fiscal Impact: Yes [X] No [ ] General Fund: Yes [ ] No [X]
Attachments: Yes [ ] No [X]
Public Notification: E-Mail: Meetings and Agendas - City Council (12/04/2024)
Department Approval: Yanni Demitri, Public Works Director / City Engineer (11/22/2024)
RECOMMENDATION
Staff recommends the City Council approve a professional services agreement with CWE for the Transfer Station Stormwater Diversion Upgrades in an amount not-to-exceed $129,500.
BACKGROUND
The City owns and operates a 500-ton per day solid waste transfer station at 9255 West Jefferson Boulevard. The transfer station operates six (6) days a week between the hours of 4:00 am and 4:00 pm. Solid waste, recyclable materials and organics waste collected by City Environmental Programs and Operations Division (EPO) is tipped at the transfer station and transferred to tractor/trailer transfer trucks for transit to area landfills, materials recovery facilities and compost sites. In addition, the City provides roll-off service for the collection of construction and demolition debris. All processing of materials functions are based at this facility.
Existing Stormwater Diversion System
The Transfer Station site is divided into four drainage areas. The existing stormwater diversion system captures urban run-off from two drainage areas into two underground storage chambers with a combined capacity of 30,000 gallons. The captured runoff is then pumped to the wastewater system and treated at the City of Los Angeles’ Hyperion Wastewater Treatment Plant. The stormwater diversion system prevents urban runoff pollutants from reaching Ballona Creek.
The other two drainage areas consist of the roof and parking areas. Currently stormwater runoff from these two drainage areas is treated and discharged into the storm drain system. As a result, the Transfer Station facility is subject to the NPDES Industrial stormwater general permit (IGP), WDID: 4 19I001571. The runoff from the roof drainage area is diverted into two cisterns. In a rain event where the cisterns are full, the runoff is diverted to bio-planters where it gets treated from pollutants. Once treated, the runoff is released to the curb and then enters the storm drain system. The runoff from the parking drainage area is diverted into two trench drains with filter medias where it gets treated from pollutants before it discharges to the curb and then into the storm drain system.
Stormwater Diversion System Improvements
The City would like to integrate the drainage areas from the roof and parking areas into the stormwater diversion system, thus preventing stormwater runoff from entering the storm drain system and Ballona Creek. Potential improvements include upsizing existing underground storage chambers, building additional onsite underground storage chambers, and diverting the stormwater runoff from the roof and parking drainage areas into the sanitary sewer.
DISCUSSION
On October 31, 2024, the City released a Request for Proposals (RFP #2539) seeking proposals from qualified vendors for engineering design services for the Transfer Station Stormwater Diversion System Upgrades. No addenda were released. A total of two proposals were received by the November 21, 2024, submission deadline. The proposers are listed below in alphabetical order:
1. CWE
2. Mulholland Consulting, Inc.
In accordance with Culver City Municipal Code section 3.07.065, the proposals were evaluated based on the firm’s understanding of the project scope of work; firm’s qualifications and experience with similar project; schedule; and cost effectiveness. Staff determined CWE to be the best qualified.
CWE is a consulting firm with extensive experience and expertise in designing and implementing stormwater infrastructure projects. Recent relevant experience includes designing Culver City’s Mesmer Low Flow Diversion Project. CWE has also provided professional design services for stormwater infrastructure projects for local agencies such as the City of San Fernando, City of El Monte and City of Beverly Hills.
Staff recommends that City Council approve a professional services agreement with CWE for the engineering design services for the Transfer Station Stormwater Diversion System Upgrades in an amount not-to-exceed $129,500.
FISCAL ANALYSIS
The Adopted Budget for Fiscal Year 2024-2025 includes sufficient funding for the engineering design services in CIP Account No. 202.80000.730100.PZ948 (Transfer Station Improvement Fund) in the Capital Improvements section of the budget book in the Summary by Fund and Project on page 477. The project is funded by the Refuse Disposal Fund (Fund 202).
ATTACHMENTS
None.
MOTIONS
That the City Council:
1. Approve a professional services agreement with CWE for the Transfer Station Stormwater Diversion System Upgrades in an amount not-to-exceed of $129,500; and
2. Authorize the City Attorney to review/prepare the necessary documents; and
3. Authorize the City Manager to execute such documents on behalf of the City.