Item 6-N

City Council Meeting: 12-15-98

TO: Mayor and City Council

FROM: City Staff

SUBJECT: Recommendation to Adopt a Resolution Certifying a Subsequent Mitigated Negative Declaration for the Coastal Interceptor Sewer Project, to Approve the Conceptual Architectural Design of the Moss Avenue Pumping Station, to Approve a Change Order to the Construction Contract Montgomery Watson Americas, Inc. and to Approve an Amendment to the Construction Management and Inspection Agreement with Black and Veatch, Inc. for the Appian Way Portion of the Coastal Interceptor Sewer Project

Introduction

This report recommends that the City Council adopt a resolution certifying the Subsequent Initial Study and Mitigated Negative Declaration for the Coastal Interceptor Sewer project, approve the conceptual architectural design of the Moss Avenue Sewage Pumping Station, approve a change order to the construction contract with Montgomery Watson Americas, Inc. and approve an amendment to the construction management and inspection contract with Black and Veatch, Inc., for the Appian Way portion of the Coastal Interceptor Sewer project.

Background

The Coastal Interceptor Sewer (CIS) collects sewage from the City of Los Angeles, north of the City limits and, with additional flows from the City of Santa Monica, carries it to the City of Los Angeles' Hyperion Plant for treatment. Many sections of the CIS were damaged by the 1994 Northridge earthquake and plans are underway to repair the damage. The cities of Santa Monica and Los Angeles are jointly working on this rehabilitation effort, with Santa Monica serving as the lead agency for that portion of the CIS within the City of Santa Monica. The entire CIS Project includes the Pacific Coast Highway sewer replacement, the Ocean to Pico to Main sewer rehabilitation, the Ocean to Neilson Way sewer, and the Moss Avenue Pump Station. Also included are two replacement flow monitoring stations which monitor the flow in and out of the City at the northern and southern City limits. Construction has been completed for the replacement Moss Avenue Pumping Station's structural shell and construction for the Appian Way portion of the CIS will commence in January 1999. The 1,000 foot Appian Way portion of the work includes the construction of a large diameter (between 54" and 60") sewer in Appian Way from Pacific Coast Highway to the Moss Avenue Pumping Station, a new inlet structure at Moss Avenue Pumping Station, and dual force mains in Appian Way and Seaside Terrace from the Moss Avenue Pumping Station to Ocean Avenue. Environmental Analysis

The original CEQA Initial Study and Mitigated Negative Declaration approved only the subterranean portion of the Moss Avenue Pumping Station. Now that the CIS project design is near completion, a Subsequent CEQA Initial Study and Mitigated Negative Declaration have been prepared for the entire CIS project. The twenty-day review period commenced on November 15, 1998 and closed on December 4, 1998. No comments were received. The Subsequent Initial Study and Mitigated Negative Declaration are included with this report as Exhibit A.

Conceptual Architectural Design

The existing Moss Avenue Sanitary Sewer Pumping Station was constructed in the late 1940s and is in critical need of replacement. The construction of a new pumping station commenced in November, 1997. The finished facility will have ventilation, gas detection and alarm systems, explosion proof electrical fixtures, appropriate staff access, odor control, and new properly-sized valve systems, and pumping and piping throughout the station, all of which are lacking in the present facility.

The subterranean structural shell for the pumping station is complete. The finished structure will include a number of necessary surface features, including retaining walls, an electrical transformer, personnel and equipment access hatches, a skylight, air conditioning equipment, fenced parking, and air intake and discharge vent piping. Exhibit B contains a photograph of the Moss Avenue site prior to construction of its replacement structural shell. Exhibit C contains drawings of the proposed facility, which was designed by Miralles Associates to complement the adjacent Project New Hope and Dry Weather Runoff Reclamation Facility (DWRRF) projects.

All exhaust piping from the pumping station will be screened from the public in a cylindrical structure, which is to be capped with a perforated metal canopy thematically matching those on the DWRRF project. The fresh air intakes will also receive architectural treatment and screening. The remaining above grade features will be landscaped and screened with materials to carry the theme of the DWRRF project through to the Moss Avenue Sanitary Sewer Pumping Station and for a smooth visual transition into the Project New Hope residential property. The project will be submitted for Architectural Review Board approval.

Construction and Construction Management Contracts

At the meetings on September 8, 1998 and October 27, 1998, the City Council waived competitive bidding and authorized the City Manager to negotiate and execute contracts in order to accelerate the construction of the Appian Way portion of the CIS project. However, the Subsequent Initial Study and Mitigated Negative Declaration have recommended that, in order to further mitigate negative impacts to the Pier and beachfront areas, the project be expedited with additional evening work so that all construction will be complete prior to Memorial Day, 1999 and that the project include comprehensive traffic controls. In order to meet this mitigation measure, staff is recommending that a change order to the construction contract with Montgomery Watson Americas, Inc., in the amount of $801,000 and an amendment to the construction management and inspection contract with Black and Veatch, Inc., in the amount of $86,000 be approved, for the Appian Way portion of the CIS project. Approval of the change order and contract amendment for the Appian Way portion of the CIS project is recommended at this time in order to meet the Memorial Day, 1999 completion date recommended in the Subsequent Initial Study and Mitigated Negative Declaration. In addition to a condensed work schedule, the amended contracts provide for an expedited material fabrication and delivery schedule and for completion of all force main connections in Appian Way and Ocean Avenue.

Budget/Financial Impact

FUNDS REQUIRED FOR CONSTRUCTION CONTRACT

Contract Change Order $801,000
Contingency 200,000
SUB-TOTAL $1,001,000

FUNDS REQUIRED FOR
CONSTRUCTION MANAGEMENT CONTRACT

Contract Amendment $86,000
Contingency 25,000
SUB-TOTAL $111,000
TOTAL FUNDS REQUIRED $1,112,000

Funds are available in the amount of $1,112,000 for the Moss Avenue Pumping Station portion of the project in CIP account number 31-760-661-20099-8900-99345 (Moss Avenue Phase II). Under their current agreement with the City of Santa Monica, the City of Los Angeles is responsible for 90% of all capital improvement costs.

Recommendation

Staff recommends that the City Council:

2. Approve the conceptual design for the Moss Avenue Sewage Pumping Station surface features;

Exhibits:

A - Subsequent Initial Study and Mitigated Negative Declaration

B - Old Pumping Station Photograph

C - Drawings for New Station

Prepared by: Craig Perkins, Environmental and Public Works Management Director

Suzanne Frick, Planning and Community Development Director

Anthony Antich, P.E., City Engineer

Gil Borboa, P.E., Utilities Manager

Jack Schroeder, P.E. Sewer Repair Program Manager

Susan Lowell, P.E., Civil Engineer