ADMINISTRATIVE COMMITTEE

 

3.

CONSIDER AUTHORIZING FUNDS FOR SANTA MARGARITA ASR EXPANSION ENGINEERING SERVICES.

 

Meeting Date:

February 11, 2019

Budgeted: 

No

 

From:

David J. Stoldt

Program/

Water Supply Projects

 

General Manager

Line Item:

35-04-786004

 

Prepared By:

Maureen Hamilton

Cost Estimate:

$341,000

 

 

 

 

 

General Counsel  Review:  N/A

Committee Recommendation:  The Administrative Committee reviewed this item on February 11, 2019 and recommended ________________.

CEQA Compliance:  This action does not constitute a project as defined by the California Environmental Quality Act Guidelines Section 15378.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUMMARY:  Staff requests funds and contract authorizations to complete the design and prepare bid documents for additional facilities at MPWMD’s expanded Santa Margarita Aquifer Storage and Recovery (ASR) facility located at 1910 General Jim Moore Boulevard in Seaside.  The work includes:

·         Design of a new water treatment chemical storage and dispensing building, with associated appurtenances.

·         Design modified site grading, drainage, and paving to accommodate the new facilities.

·         Design modified process piping and water treatment chemical injection facilities to accommodate off-site waters.

·         Constructability review of design documents.

·         Engineering support during bidding.

·         Additional services required in advance of project construction.

 

RECOMMENDATION:  That the Administrative Committee should recommend that the Board of Directors:

1.      Authorize funds for services to complete the design and bid documents for additional construction at the Santa Margarita ASR facility in the amount of $341,000 as described in the following recommendations.

2.      Authorize the General Manager to enter into a contract with Pueblo Water Resources (PWR) to complete the design and provide engineering services for an amount not-to-exceed (NTE) $261,445.

3.      Authorize the General Manger to enter into an agreement with a qualified consultant to provide a constructability review for an amount NTE $15,000.

4.      Authorize expenditures for potholing, advertising, additional geotechnical work, neighborhood outreach materials and distribution, permit expenses, and other expenses for an amount NTE $20,000.

5.      Authorize the General Manager to approve changes to the above work for an amount NTE $44,555 (15% contingency).

 

Funding for this project will be from one or more of the District’s revenue funds and will be identified in the mid-year budget adjustments presented to the Board in March 2019.

 

DISCUSSION:  When the Santa Margarita ASR facility (historically Phase 1 ASR project) was originally designed by MPWMD with PWR in the 2001-2006 period, it was intended as a stand-alone facility.  Since then, the project concept and designs have been modified in order to accommodate the added capacity needs of other existing and proposed ASR sites in the Seaside Groundwater Basin.  Specifically, expanded well backflushing and water treatment facilities (together ASR Expansion) were identified as required. 

 

Pure Water Monterey project operation will require additional production capacity from the Seaside Groundwater Basin in 2020.  Regulatory approval to utilize wells ASR-2, ASR-3, and ASR-4 for production requires construction of water treatment (disinfection) facilities. 

 

The Santa Margarita facility, owned by MPWMD, is uniquely suited to address water treatment because of its geographic position as the southernmost ASR facility within the Cal-Am conveyance system.  Capital improvements to the Santa Margarita site are funded by MPWMD.  Recently, the District completed construction of an expanded backflush basin at the site to accommodate backflush needs for up to six ASR wells (existing wells ASR 1 through 4 and proposed wells ASR 5 and 6).[1]

 

On July 18, 2016, the Board authorized a Contract Amendment with PWR in the amount of $300,729 to perform Santa Margarita site expansion engineering.  Improvements include grading, drainage, paving, underground piping and utilities, backflush basin design, water treatment chemical offloading facility, site landscaping and fencing. 

The following milestones were met by staff and PWR to allow ASR Expansion to begin in earnest:

·         November 2016 land agreement for expanded area required for basin expansion to accommodate underground pipeline tie-in.

·         February 2017 Soil Management Plan, required for Right of Entry to construct and operate on the former Fort Ord Munitions Response Area.

·         April 2017 ASR Expansion kickoff meeting with Cal-Am to coordinate timing and resource prioritization with respect to facility operation. 

·         August 2017 Basis of design review with Cal-Am.

The following work was performed under the July 2016 authorization following the meetings with Cal-Am:

1.      Designed and prepared construction drawings for major earthwork including site grading, basin excavation and slope reinforcement, excavated soil placement with retaining wall, and underground pipe installation.

2.      Designed alternate site configurations required due to modification of chemical delivery facility.

3.      Revised construction drawings to include only the basin expansion.  Pipe modifications were tabled until a site configuration alternative was agreed to by all Stakeholders.

4.      Created presentation materials and attended meeting for Stakeholder site configuration selection with the City of Seaside, Fort Ord Reuse Authority, Arcadis, Cal-Am, and MPWMD on 6/1/2018. 

5.      Created presentation materials and attended Seaside City Council Meeting to present selected site configuration option on 7/19/2018.

6.      Re-designed and re-issued the Backflush Basin Expansion construction drawings to accommodate new site configuration including site grading, excavated soil placement, convert front retaining wall to a fence, and drainage controls.

7.      Created basis of design for new piping configuration, capacity confirmation, water treatment chemical building content and layout, final grading, and drainage.  Reviewed with Operations.

8.      Provided bid support for the Backflush Basin Expansion project.

9.      Began detailed design for water treatment facilities.

As of the writing of this staff note, 67% of the funds authorized in July 2016 have been expended.  Staff expects that the remainder of the previously authorized funds will be expended in FY 2018-19.

 

It should be noted that the scope of work approved in July 2016 did not include planning and design services for water treatment facilities at the Santa Margarita site.  As a result of design review meetings, which included Cal-Am senior management involved in operations and risk management, it was determined that the safest configuration at the site is to locate delivery of chemicals as closely as possible to the chemical storage and treatment area.  PWR developed alternative site configurations and assisted the MPWMD in working with all stakeholders to select an acceptable new design; however, the selected alternative requires new design work that is both significantly different from the preliminary design and outside of the original scope of work in the contract with PWR.

 

The following new work is required:

1.      Design a new water treatment chemical storage and dispensing building with associated appurtenances.

2.      Modify site grading, drainage, and paving to accommodate the new facilities.

3.      Modify piping and water treatment chemical injection facilities to accommodate the new off-site waters slated for processing at the facilities and additional features and equipment requested by CalAm.

4.      Provide engineering support during the bid process for construction of the water treatment facility portion of ASR Expansion.

The cost for this work is estimated to be $261,445.

 

An additional $15,000 in funds for a constructability review is requested.  Due to the required project completion timeframe and evolving basis of design, the likelihood and impact of construction issues in design documents are high.  Greater review and focus on constructability prior to bid will reduce the risk of schedule impact and cost overrun. 

 

Funds for potholing, advertising, potential geotechnical work, preparation and distribution of neighbor outreach materials, permits, and other unforeseen costs required in advance of project commencement are requested in an amount not to exceed $20,000.  

 

A contingency of $44,555 (15%), is requested for the work.  Given the evolving inter-related Peninsula water supply projects and more immediate priorities vying for operations resources for design review, design changes are expected. 

 

EXHIBIT

3-A      Proposal for Engineering Services

 

 

U:\staff\Board_Committees\Admin\2019\20190211\03\Item-3.docx


[1] Facilities at the Santa Margarita site are owned by MPWMD.  Cal-Am owns facilities at the Seaside Middle School site.  Cal-Am is also planning on building and owning facilities including wells ASR-5 and 6 as part of the Monterey Peninsula Water Supply Project.