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HomeMy WebLinkAbout1994-02-09; Municipal Water District; 0209.02; Lining & Covering of Maerkle Reservoir ProjectB # 0209-02 TITLE: LINING AND COVERING OF ITG. MAERKLE RESERVOIR PROJECT 02/09/94 CITY MGR. ~ EPT. -cram- CITY ATTY - ECOMMENDED ACTION: Staff is requesting that the Commission agree to proceed with the design to line and cover the Maerkle Reservoir Facilities. ITEM EXPLANATION This project is the result of a directive from the State of California Department of Health Services and also from the Needs Study performed for the District by Dudek 81 Associates (formerly Luke-Dud& Civil Engineers, IC.) With Board approval, the first of three phases of this project began in 1988 with the design and construction of a 10 million gallon water storage facility. This storage facility was constructed to help offset the loss of operational storage anticipated when the large open reservoir was drained for the lining and covering phase. Upon completion of this 10 million gallon facility the second phase of this project began in 1991 with the design and construction of pumping facilities and chloramhation facilities. Because of the District's water distribution system hydraulics, about 400 acre feet of water stored in this Maerkle Reservoir was available. With the addition of the pumping facilities, 200 additional acre feet of water in the Maerkle Reservoir is now available. In addition, the construction of the chloramination facilities allows the district to utilize the water in the Maerkle Reservoir with water in the system that comes directly from Metropolitan Water District. The third phase of the project began in 1992 with the design of the lining and covering phase. At the June 23, 1993 Commission meeting a presentation was made by the consultant John Powell and Associates. This presentation reviewed the 10% design report and staff recommendation was to proceed with the design. The Commission requested some additional information including filtration alternatives and utilizing a concrete liner rather than an asphalt liner. At the July 28, 1993 Commission meeting these alternatives were reviewed and costs were presented. After discussion it was decided to write to the Department of Health Services requesting an exemption from lining and covering the reservoir. At the November 10th meeting three items pertaining to the lining and covering project were reviewed by the Commission. The concrete liner option and construction of a filtration plant were determined to be infeasible. The third item reviewed was the response from the Department of Health Services to the District's request for an exemption from lining and covering the reservoir. After discussion of this item the Commission requested staff to ask the Department of Health Services to review their response with the Commission at the next Commission meeting. Agenda Bill No. 0209-02 Page 2 At the December 8, 1993 Commission meeting representatives of the County Water Authority and the Department of Health Services were present. A review of the 10-day storage policy by the County Water Authority representative was made. In addition, Ms. Toby Roy from the Department of Health Services reviewed the Department of Health services' response regarding the District's request for an exemption. Ms. Roy summarized the letter by stating that the District could certainly apply for an exemption but would be required to construct additional facilities and perform substantial additional testing. The approval of the exemption would take approximately 6 months from the State and EPA. Ms. Roy did point out that regardless of the additional facilities constructed and money spent on this exemption, should we fail any of the tests (i.e. tests for Giardia cysts) we would be immediately under orders to line and cover the reservoir or construct a treatment facility within an 18 month time period. As a result staff does not recommend pursuing the exemption alternative. Mer discussion it was decided to put off action until Commissioner Lewis can be present. At the January 12,1994 Commission meeting the Commission requested staff write a letter to Ms. Roy asking her to reconsider her decision regarding using Maerkle Reservoir. (see attached staff letter and response) Carlsbad Municipal Water District 5950 El Camino Real, Carlsbad, CA 92008 Engineering: (6 19) 438-3367 Administration: (61 9) 438-2722 .FOX: (619) 431-1601 January 26, 1994 Ms. Toby Roy, District Engineer Department of Health Services Division of Drinking Water and Environmental Management 1350 Front Street, Room 2050 San Diego, CA 92101 MAERKLE RESERVOIR LINING AND COVERING, CMWD PROJECT NO. 90-109 Dear Toby: The Carlsbad Water Commission, at their January 12th meeting, asked staff to request that you reconsider your decision to isolate our Maerkle Reservoir. I am referring to your letter to me, dated September 8, 1993, whereby you informed us that if we desire to use the reservoir before the problem is corrected, we will be required to notify the public in accordance with Tile 22, Chapter 17, Section 64666 (c) of the SWTR. The Commission feels that the reservoir has served the community well for years and the water is chlorinated and monitored. Therefore, the Commission is requesting we appeal your decision to shut-down the reservoir. Any consideration you can give this request is greatly appreciated. Very truly yours, ROBERT J. GREANEY U GENERAL MANAGER RJG:mg cc: District Engineer Operations Superintendent 'Serving Carlsbad for over 35 years" STAE ff CALIFORNIA4EALTH AND WELFARE AGENCY DEPARTMENT OF HEALTH SERVICES OFFICE OF DRINKING WATER 1350 FRONT STREET, ROOM 2050 SAN DIEGO, CA 92101 FAX (619) 525-4383 PETE WILSON, Gowmor (619) 525-4159 February 1, 1994 Robert Greaney General Manager Carlsbad Municipal Water District Carlsbad, CA 92008 Dear Mr. Greaney: 'I 5950 El Camino Real .* - - ---... 371 ',I(>-. ------__ " This is in response to your letter dated January 26, 1994. In our September 8, 1993, letter we did not shut-down the Maerkle Reservoir. Carlsbad MWD can use water from Maerkle Reservoir as long as the District notifies the public in accordance with Title 22, Chapter 17, Section 64666 (c) of the Surface Water Filtration and Disinfection Treatment Regulations (SWTR). The District will be required to notify the public once during each and every quarter in which the District uses water from Maerkle Reservoir. The method of notification would be by publication of a Department approved statement, including the required wording from Section 64666, in a local newspaper. These requirements are consistent with the Department's policies regarding unfiltered surface water sources. In addition, all water systems applying for an exemption from the SWTR are required to notify the public until they demonstrate compliance with the exemption criteria. If you have any questions regarding this letter contact Steve Williams at (619) 525-4580. Sincerely, Toby J. Roy, P.E,.J District Engineer Enclosure cc: San Diego County Environmental Health Services LO20194 .WC/JSW/Sl 1