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HomeMy WebLinkAbout3.4 Export System Env Review CITY OF DUBLIN AGENDA STATEMENT City Council Meeting Date: February 24, 1992 SUBJECT: Informational Item: Tri-Valley Wastewater Authority (TWA) Export System Environmental Document Review Report by: Public Works Director Lee Thompson EXHIBITS ATTACHED: 1) TWA Fact Sheet 2) Draft letter to the Dublin San Ramon Services District (DSRSD) supporting the project. 3) A copy of the Draft Subsequent Environmental Impact Report (DSEIR) is available in the Planning Director's office and will be available at the City Council meeting. 4) Mr. Robert Whitley, General Manager of the TWA, will make a presentation at the meeting and will be available for questions. RECOMMENDATION: 1) Receive Staff's and Mr. Whitley' s presentation 2) Receive questions from the City Council and the public. 3) Direct Staff to prepare comments to the Environmental Document for review by the City Council at the March 9th meeting, if comments are deemed appropriate. 4) Authorize the Mayor to send a letter expressing City Council support of the development of expanded sewer capacity to Dublin's planning areas. FINANCIAL STATEMENT: None at this time. Future developers and sewer users will ultimately pay for the development and maintenance of the system. DESCRIPTION: In 1986, the sewer providers in the Valley formed a joint powers authority (the Tri-Valley Wastewater Authority or "TWA") to plan and construct additional facilities to serve the future needs of the member agencies. These agencies include the Dublin San Ramon Services District (DSRSD) , the City of Livermore, the City of Pleasanton, and Alameda County. A solution for increasing the capacity of the export line to San Francisco Bay was proposed in the past, but that solution ran into some political and environmental problems. " New solutions have been explored, and an updated environmental document has been prepared for release to the public. This new Environmental Report covers four different alternatives: 1) The preferred alternative is to export future untreated wastewater north along the Southern Pacific right-of-way to the Central Contra Costa Sanitary District' s system. 2) The second alternative would pump treated wastewater west over the Dublin Grade to the edge of the Bay, where it would connect to the existing East Bay Discharger's Authority (EBDA) and then to EBDA' s existing outfall into San Francisco Bay. 3) The third alternative is the same as Alternative 2 except that it would have its own outfall to San Francisco Bay. 4) The fourth alternative is the "no project" alternative. - The report lists several significant adverse effects, which can be reduced to less than significant by implementing suggested mitigation measures. This Environmental Impact Report would be the only one for the project, and the project could be implemented upon completion and approval of the report by the TWA.- - Mr. Robert Whitley will make an oral presentation regarding the project and the details of the environmental impact report. a: (corres)\feb\agsttwa ITEM NO. 3UI COPIES TO: Robert Whitley CITY CLERK Bob Beebe, DSRSD I / 101310 la 0 FILE t • • a_- Wa Fact Sheet Problem: The cities and counties in the tri- • an emergency storage basin located at the valley area of the Livermore-Amador Livermore Water Reclamation Plant Valley have experienced significant ° a gravity pipeline (East Valley development over the past decade. All land Interceptor) from Livermore Water use planning agencies in the tri-valley area Reclamation Plant to Export Pump are currently reviewing their General Plans Station #1 regarding future development proposals and policies. The potential construction an emergency storage basin at Export will result in additional residential, Pump Station #1 commercial and industrial wastewater flow • Export Pump Station #2 that exceeds the existing treatment and • an emergency storage basin at Export disposal capacity the tri-valley area. The Pump Station #2 Tri-Valley Wastewater Authority (TWA), a ° a pressure pipeline (West Valley joint powers agency comprised of Alameda Interceptor) from Export Pump Station County, Dublin San Ramon Services District #2 to junction with export pipeline and the cities of Pleasanton and Livermore, was formed in 1986 to plan, construct and ° an export pipeline from Export Pump operate additional facilities required to Station #1 to the CCCSD interceptor in serve the future needs of the member San Ramon agencies. TWA is also considering two other Project Under Review: TWA proposes to alternatives, known as Alternative West 2 construct a wastewater export system to and Alternative West 3. The in-valley accommodate the increased amounts of portion of Alternative West 2 would be wastewater being generated within the similar to Alternative North 3, although the TWA service area. TWA is contemplating locations of the components would differ. three alternative means of exporting its Other differences are that Alternative West wastewater out of the Tri-Valley, in 2 would have only one export pump station response to policies of the San Francisco and that the existing treatment plants Bay Regional Water Quality Control Board would need to be expanded. The export (RWQCB) and Zone 7 of the Alameda pipeline for this alternative would travel County Flood Control and Water west from the Livermore and San Ramon Conservation District. valleys,over the East Bay hills,and down to the tidal salt flats at the edge of The preferred alternative, known as San Francisco Bay. The export pipeline Alternative North 3, would collect would connect with an existing East Bay untreated wastewater from the service area Dischargers Authority (EBDA) interceptor and export it north to the Central Contra which would convey TWA and EBDA's Costa Sanitary District's (CCCSD) treated wastewater to EBDA's existing wastewater treatment plant, located north outfall into San Francisco Bay. of the City of Concord. From here it would Alternative West 3 would be identical to be treated and discharged to Suisun Bay via CCCSD's existing outfall. The components Alternative West 2 except that, rather than of this project would include the following tying into the EBDA discharge system, EXHPi1T Pace - fait \ TWA would construct its own outfall into is not implemented, the existing LAVWMA San Francisco Bay. system could become overburdened, resulting in violation of state and federal ' TWA has prepared a Draft Subsequent discharge requirements. Environmental Impact Report (DSEIR) which considers implementation of each of Significant unavoidable land use and traffic the three project alternatives under three impacts would also result from growth in different development scenarios. The the Tri-Valley region. development scenarios result in different amounts and distributions of growth in the Environmental Review Process: The tri-valley and in different wastewater DSEIR may be reviewed at any of the system capacities. The Existing General following locations through March 27, 1992: Plans Scenario would have a dry weather Livermore Public Library export system capacity of 16.64 MGD. The 1000 S. Livermore Avenue Prospective General Plans Scenario would Pleasanton Public Library have a dry weather export system capacity 400 Old Bernal Avenue of 26.08 MGD. The Constrained General Dublin Public Library Plans Scenario export system would have a 7606 Amador Valley Blvd. dry weather capacity of 9.74 MGD. San Ramon Public Library Potential Significant Impacts of the 100 Montgomery Project: The proposed TWA wastewater Dublin San Ramon Services District export system would have a variety of 7051 Dublin Blvd., Dublin impacts and potential impacts. These Pleasanton City Clerk's Office impacts are summarized, along with 123 Main mitigation measures recommended to Livermore City Clerk's Office reduce their significance, in the DSEIR. A 1052 South Livermore Avenue detailed discussion of each impact is Central Contra Costa Sanitary District presented in the appropriate chapter of the 5019 Imhoff Place, Martinez DSEIR. A public hearing will be held Implementation of the proposed project Wednesday February 19, 1992 could result in numerous significant 7:45 PM adverse impacts. However, by implement- City of Pleasanton ing the suggested mitigation measures, all City Hall Council Chambers of the direct project impacts would be 200 Bernal Avenue reduced to less than significant. The public comment period regarding the The one exception would apply to the No contents of the DSEIR will end Friday, Project Alternative. If this alternative were March 27, 1992. Written comments should selected, one direct "project" impact could be addressed to Tri Valley Wastewater occur which would be considered Authority, 7051 Dublin Blvd., Dublin, significant and for which there is no California 94568. effective mitigation. If the proposed project Today's meeting is being held to (1) inform you about the TWA project alternatives and the relevant environmental impacts, (2) answer your questions about the DSEIR and the review process, and (3) request any written comments on the contents of the DSEIR to be submitted to TWA by March 27, 1992. 0 . Tri-Valley Wastewater Authority Project Alternatives . /o. m _ � >__ `v t� k - I CCCSD WA 7- ® 1 6 „" o,, CCSD A-LINE REV ittra . ..Iltils"'iio ` � �x DOE ?i INTERCEPTOR PROD` Para We cro►rrnA COSTA COUNTY - FINIS w VF � V 4s.�• • 0.S AMON VALLEY N. 1 °` I' TOR(PHASE III) '� t \ ' PROJE ° AREA l TRI-VALLEY WA r ,1 •TER ♦ �is '\ _ AUTHORITY P • NING -L - ; "�� AREA BOON ART ,7! ONNECTION TO mss"� `1_ / Q PI// CCCSD PIPELINE " '� \\ ,L ' ce\�. f" --�__� ;.� \ -I \,,,CCC\.. ' '' • - •R ... a r • c - " t ' ' - _ t,l m�1— _ ° * m r ,r ti ■ �* l - DSRSD WA A ATER \ • .. : . TREATMENT P <LB I, UVERMOR WATER \ t F ‘ RECLAI ` ON PLAN 7 1 L ALAMEDA COUNTY J , - - �.. is Alternative North 3 Alternative West 2 and 3 ° CCSD Existing Pipeline Alternative West 3 DRAFT February 25, 1992 Chairperson and Directors Tri-Valley Wastewater Authority C/O Mr. Robert Whitley, General Manager 36 Quail Court Walnut Creek CA 94596 SUBJECT: Expansion of Wastewater Services in the Livermore/Amador Valley Dear Chairperson and Directors: For a number of years, the Dublin City Council has been following the various proposals and studies undertaken by the Tri-Valley Wastewater Authority for the provision of expanded sewer services to the Valley. We recognize that it has been a long, laborious process to find a solution that is economically viable as well as environmentally acceptable. It appears that the solution of exporting of wastewater to the Central Contra Costa Sanitary District is within reach. We will be commenting on the Environmental Impact Report in detail; however, the members of the Dublin City Council recognize that the expansion of your system is an integral part of Dublin's future plans, and we wholeheartedly support the project. If you have any questions, please feel free to call my office. Sincerely, Peter W. Snyder Mayor PWS/gr a:(corres)\feb\25twa ; I if, /25 II Papp $ r s AFT l .