ITEM:

CONSENT CALENDAR

 

2.

Receive DRAFT REPORT ON CONSTRUCTION OF NEW phase 1 ASR WELL no. 2

 

Meeting Date:

October 15, 2007

Budgeted:

N/A

 

From:

David A. Berger,

Program/

N/A

 

General Manager

Line Item No.:

 

Prepared By:

Joe Oliver

Cost Estimate:

N/A

 

General Counsel Approval:N/A

Committee Recommendation: N/A

CEQA Compliance:N/A

 

SUMMARY:A draft report documenting the construction of the Monterey Peninsula Water Management Districtís (Districtís) Santa Margarita Test Injection Well No. 2 (now referred to as Aquifer Storage and Recovery Well No. 2 [ASR No. 2]) has been prepared by the Districtís technical consultant on the project, Pueblo Water Resources, Inc.The draft report is provided as Exhibit 2-A.The report describes the successful construction of the new ASR well, which was constructed as part of the Seaside Basin Phase 1 ASR Project.Construction of the new well was completed in April 2007, and preliminary test pumping of the well indicates the well will be capable of meeting the design injection and production rates of 1,500 and 3,000 gallons per minute, respectively.Currently, District staff and consultants are preparing for installation of appurtenant facilities at the site, to allow injection testing to commence at the new well during the upcoming Water Year (WY)

2008 recharge season.

††††

RECOMMENDATION:The Board should receive the draft report documenting the construction of the ASR No. 2 well, and approve preparation and distribution of the final report, subject to inclusion of comments from the District or other interested parties.If this item is adopted along with the Consent Calendar, the report will be finalized and distributed within approximately one month.

 

BACKGROUND:The District has been studying the Aquifer Storage and Recovery (ASR) concept in the Seaside Basin since 1996.The concept entails diverting excess winter flows from the Carmel River Basin approximately six miles to the hydrologically-separate Seaside Basin, where the water is injected into specially-constructed ASR wells, for later recovery from these wells during dry periods.Prior to injection, the diverted water is treated so that it meets potable drinking water standards.†† In 1998, the District constructed a pilot injection well, known as the Paso Robles Test Injection Well (PRTIW) in the northeastern portion of the City of Seaside.The pilot well is 12 inches in diameter, 460 feet deep, and screened in the Paso Robles Formation aquifer.Injection testing during WYs 1999 and 2000 at the pilot well provided data that allowed the District to proceed with construction of a larger injection test well, SMTIW No. 1 (now referred to as ASR Well No. 1) in 2001 on the former Fort Ord Military Reservation, approximately 300 feet east of the PRTIW.ASR Well No. 1 is 18 inches in diameter, 720 feet deep, and screened in the Santa Margarita Sandstone aquifer.The Santa Margarita aquifer has more favorable hydrogeologic characteristics, and is therefore more conducive to a full-scale ASR project in the basin.ASR Well No. 2 is larger and deeper, at 22 inches in diameter and 790 feet deep.The draft report has been sent to California American Water staff for their review and comment.The report, once finalized, will be a useful reference document to support future testing and operations at the Phase 1 ASR Project site.

 

IMPACT ON STAFF/RESOURCES:A significant staff effort has been expended planning, coordinating, and overseeing work on the Districtís ASR testing program in the Seaside Basin.It is planned to continue this level of effort during the remainder of this year and into the next recharge season.

 

EXHIBITS

2-A††††† Draft construction report, without appendices

 

 

J. Oliver, 10/4/2007 staff note, 2 pages

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