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1 APPENDI N Technical Memorandum: Monterey Regional Water Supply Evaluation: Evaluation Summary, RMC Water and Environment, prepared for Monterey Regional Plan Work Group, January 25, 2008 CalAm Coastal Water Project N-1 ESA / Final Environmental Impact Report October 2009

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3 DRAFT Technical Memorandum Monterey Regional Water Supply Evaluation Subject: Evaluation Summary Prepared For: Monterey Regional Plan Work Group Prepared by: Lindsey Clark Reviewed by: Steve Kasower, Stephanie Hughes P.E., Lyndel Melton, P.E. Date: January 25, 2008 Reference: Water andenvironment 1 Background California-American Water Company (CalAm) has proposed the Coastal Water Project (CWP), a 10 MGD desalination plant located at Moss Landing, in response to State Water Resources Control Board Order No. WR and to satisfy the Seaside Basin Adjudication requirements. The CWP would provide 12,500 acre-feet per year (AFY) to meet these two requirements. (See Appendix A, Compliance with Plus Additional Regional Demands). CalAm prepared the Proponent s Environmental Assessment (PEA) for the CWP and the California Public Utilities Commission (CPUC) is now in the process of preparing the Environmental Impact Report (EIR). The Division of Ratepayers Advocates (DRA) of CPUC is working in conjunction with the University of California, Santa Cruz (UCSC) Center for Integrated Water Research (CIWR) to evaluate whether an alternative approach exists that would be less expensive for ratepayers and easier to implement than the CWP and could be presented as an alternative in the CPUC s EIR. RMC was tasked to provide technical support to DRA and the Monterey Regional Plan Work Group, evaluating options and developing alternatives for consideration. There exist regional water supply needs that are in addition to the gap in water supply necessary to offset the and Seaside Basin Adjudication requirements. As a result, two levels of water supply development have been considered: Development of incremental supply necessary to meet the and the Seaside Basin Adjudication requirements; and Development of incremental supply necessary to meet identified gaps in regional water supplies. This memorandum presents RMC s technical approach, the cooperation among water managers and stakeholders, the recommended programs, and the next steps for implementation. January N-3

4 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT 2 Overall Approach RMC participated in a series of three meetings of the Monterey Regional Plan Work Group (Work Group) facilitated by DRA/UCSC CIWR, four Regional Plenary Oversight Group (REPOG) meetings, and two meetings of the managers of the local water and wastewater agencies 1 : Work Group Meeting 1 July 18, 2007 Work Group Meeting 2 August 22, 2007 REPOG Meeting August 29, 2007 Work Group Meeting 3 September 19, 2007 REPOG Meeting September 26, 2007 Water Managers Meeting October 24, 2007 REPOG Meeting October 31, 2007 Water Managers Meeting December 10, 2007 REPOG Meeting December 18, 2007 The meetings provided a forum for identifying project components, confirming criteria, evaluating alternatives, assembling water project portfolios, and establishing a preferred local regional water supply alternative that addresses both the replacement needs (95-10 and Seaside Adjudication) and the regional needs. The three Work Group presentations and the December REPOG presentation are provided in Appendix B. Additional presentations and materials are available at the DRA project website 2. Prior to Work Group Meeting 1, RMC gathered projects from existing documents and from discussions with community and agency leaders to draft the table Project Information (see Appendix C) describing each of the projects and relevant information. A condensed set of project and program evaluation criteria was established from the Draft Plan of Study prepared by the Work group May 25, and from the Monterey Peninsula Integrated Regional Water Management Plan (IRWMP). In order to determine the amount of additional supply required, water gaps were acquired for a number of districts, cities, and communities. These gaps are as follows: Castroville 1,000 AFY Marina Coast Water District (MCWD) 2,400 AFY Monterey Peninsula Water Management District (MPWMD) 17,000 AFY North County 4,900 AFY Moss Landing 70 AFY Pajaro-Sunny Mesa 3,000 AFY Salinas 0 AFY TOTAL 28,400 1 Castroville Water District (Eric Tynan), Marina Coast Water District (Jim Heitzman), Monterey County Water Resources Agency (Curtis Weeks), Monterey Peninsula Water Management District (Dave Berger and Andy Bell), Monterey Regional Water Pollution Control Agency (Keith Israel) January N-4

5 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT The attendees at Work Group Meeting 1 reached a consensus regarding the complete list of projects that would be included in the analysis (see Table 1), as well as the appropriate criteria to use for project evaluation (Table 2). RMC incorporated comments from the Work Group into the Project Information spreadsheet, and performed evaluations on both a project and program basis for discussion at Work Group Meeting 2. The evaluations are discussed in more detail in the following section. After discussions and input from attendees of both the Work Group and REPOG, RMC finalized the preliminary evaluations in order to recommend both a replacement program and a regional program at Work Group Meeting 3. Following Work Group Meeting 3, refinements to the recommended programs were incorporated and reviewed with the local water and wastewater managers at two separate meetings, with the revised regional program being presented at the December 18, 2007 REPOG meeting. Table 1 Projects Considered as Components of Regional Program Supply Source Projects Considered Desalination Coastal Water Project Alternative Water Source Intruded Groundwater Desalination Marina Coast Water District Pilot Desalination Project Marina Coast Water District Regional Urban Water Augmentation Project (RUWAP) Monterey Bay Regional Seawater Desalination Project (MBRSDP) MPWMD's Sand City Desalination Project (SCDP) City of Sand City Water Supply Project (SCWSP) Seawater Conversion Vessel Water Recycling Regional Urban Water Augmentation Project (RUWAP) (Phase I and II) Monterey Extension of Regional Urban Water Augmentation Project (RUWAP) Conjunctive Use and Groundwater Management Seaside Groundwater Basin Aquifer Storage and Recovery Project Carmel River/Seaside Basin In-Lieu Recharge Salinas Valley Water Project (SVWP) Phases II, and III Potable Treatment Facility (Seasonal Combination of Desal/River) Salinas Valley Groundwater Basin (Desal/Intruded Groundwater) Groundwater Replenishment Seaside Groundwater Replenishment Project Conservation Water Conservation Programs Stormwater Collection and Use Cisterns, per ponds, and other zero-discharge to Bay programs January N-5

6 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT 3 Evaluation Process Upon reaching a consensus on the projects to be evaluated and the criteria on which to base the evaluation, the Component Evaluation and the Programmatic Evaluation (see Appendix D) were performed. The Component Evaluation rated each project individually, whereas the latter rated multiple projects packaged together to form programs to be implemented in a phased approach. Attendees were able to provide input regarding the ratings at Work Group Meeting 2. A set of criteria drafted by RMC and refined by the Work Group was used for the component and programmatic evaluations as shown in Table 2. It was determined that some criteria were more appropriately applied only at the programmatic level, rather than at the individual component level. For example, the overall programmatic approach must, by definition, satisfy the regulatory requirement of the Seaside adjudication, while this constraint does not need to be imposed on each component. Therefore all criteria were applied during the programmatic evaluation, but not all were used for the component evaluation, as shown in Table 2. Criteria Table 2 Criteria for Component and Programmatic Evaluations Criteria Considerations Component Level Programmatic Level Schedule Will projects be implemented in time to supply amount required? Reliability Do projects depend on precipitation? Permitting Have permits already been acquired? If not, are there foreseen permitting issues? Public Acceptance Are parties strongly for or against the projects? Environmental High energy consumption? Adverse impacts to fish & habitats? Regulatory Adequate to meet 95-10? Responds to Seaside Adjudication? Additional Supply Amount in AFY Cost $$ < $$$ < $$$$ (estimated) Sustainability Maximize use of fresh water sources, reduce use of desalination Further, it was determined that it is currently not feasible to provide a cost/af for each component or program as discussed at Work Group Meeting 1 because the costs obtained for individual projects typically did not clarify the cost basis nor were they comparable in level of evaluation and engineering analyses. Additionally, not all project concepts have been developed to a level to provide even preliminary cost information. Therefore, there remains a need to verify costs and cost bases to evaluate project costs using a single set of assumptions. A qualitative rating system was used for cost, as well as all other criteria, shown below in Table 3. January N-6

7 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT Table 3 Legend for Component and Programmatic Evaluations General Legend: More desirable Moderately desirable Less desirable Cost: $ < $$ < $$$ < $$$$ Schedule: Within 5 years Within 10 years Unknown Because the alternative analysis was based on the same water demands as the proposed CWP (Appendix A), the component projects could not individually achieve the required volume and therefore the programmatic evaluation was the Work Group s focus. Two scenarios were evaluated, the Replacement Supply 12,500 AFY, and the Regional Supply, which is the sum of the Replacement Supply plus Future Needs 28,400 AFY. In either scenario, the programs were compared based on the qualitative rankings. Oftentimes, where one program lacked with respect to a particular criteria, another excelled, and vice versa. For example, one programmatic approach might be identified as less costly, but may not meet regulatory schedule requirements (See Programmatic Evaluation in Appendix D). The recommended approaches, discussed in more detail in Section 4 was developed to satisfy the maximum number of criteria, achieving a less expensive, more reasonably implemented, phased alternative to the CWP. Table 4 and Table 5 summarize the evaluation of Replacement Water supply options, and Table 6 and Table 7 summarize the Regional Program water supply evaluations. The gray boxes in Table 6 indicate an increase in supply from the Replacement Program to the Regional Program. The recommended program to meet the Replacement Supply needs is program C. This program was selected as the recommended program based on its ability to meet the regulatory (replacement) water needs in a reasonable time, with high levels of reliability and sustainability, at a reasonable cost. The recommended program to meet the Regional Supply needs is program A. Similarly, this program was selected based on its ability to meet the regional supply needs within a reasonable time frame, with high levels of reliability and sustainability, at a reasonable cost. January N-7

8 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT Program Table 4 Replacement Program Project Components Recycled Water Recycled Water (irrigation) Groundwater Replenishment Seaside ASR / In-lieu recharge Water Supply (AFY) Conjunctive Management Salinas River Salinas Basin Groundwater A 300 2, , ,400 B , C 300 2, ,330 D ,830 D' ,830 Conservation Stormwater Reuse Desalination Table 5 Replacement Program Evaluation Summary (C is Recommended Program) Criteria Evaluation Program Schedule Reliability Permitting Public Acceptance Environmental Cost Regulatory Requirements Seaside Adjudication A $$$ B $ - $$ C $$ D $$$ D' $$ Sustainability January N-8

9 Monterey Regional Water Supply Evaluation Evaluation Summary Table 6 Regional Program Project Components DRAFT Program Recycled Water Recycled Water (irrigation) Groundwater Replenishment Seaside ASR / In-lieu recharge Water Supply (AFY) Conjunctive Management Salinas River Salinas Basin Groundwater A' 3,000 2,500 1,400 3,930 4, ,470 A'' 3,000 2,500 1,400 7,800 4, ,600 A''' 3, ,400 11, ,680 B' 3,000 2,500 1,400 16,100 4, C' 1,700 2,500 1, , ,700 D'' 1, , ,500 Conservation Stormwater Reuse Desalination Program Table 7 Regional Program Evaluation Summary (A is Recommended Program) Schedule Reliability Permitting Criteria Evaluation Public Acceptance Environmental Cost Regulatory Requirements Seaside Adjudication A' $$$ A'' $$ A''' $$ B' $$ C' $$$ D'' $$$$ Sustainability January N-9

10 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT 4 Recommended Regional Approach The recommended programs for Replacement Supply and Regional Supply contain similar projects. Both are based on a phased approach containing recycled water projects, conjunctive use projects, conservation and stormwater projects, and a desalination plant. A more thorough description of the components forming the recommended regional approach is shown below in Table 8. Table 8 Preliminary Recommended Program Supply (AFY) Component Replacement Regional Description Conservation This includes an array of conservation measures to be >150 >300 implemented throughout the County. (Weather-Based Smart Irrigation Controller Program, High Efficiency Commercial Clothes Washers, retrofit to high-efficiency toilets, low-flow showerheads, drought tolerant landscape, etc.) Implementation of conservation programs is to begin immediately. Stormwater >300 >500 Cisterns, percolation ponds and berms, etc. Stormwater Seaside ASR / In-lieu Recharge (ILR) Sand City Desalination Regional Urban Water Augmentation Project (RUWAP) Salinas Basin Groundwater Seaside Groundwater Replenishment Salinas River Diversions 920 1, , ,300 2,500 2, ,800 Regional Desalination Facility 8,330 8,300 TOTAL 12,500 28,400 projects are to begin immediately. The Seaside ASR consists of injecting water from the Carmel River into the Seaside Groundwater Basin. Phase I will be implemented by Expansion will occur approximately in In-lieu recharge includes CAW using its existing production wells in the Carmel Valley during high-flow spring months to meet customer demand, rather than its production wells in the Seaside Groundwater Basin. ILR will be explored for further development. This project is moving forward and construction will be complete in Will extract intruded groundwater; Sand City anticipates that this water supply will fulfill its General Plan build-out needs until Recycled water will be produced at the Monterey Regional Water Pollution Control Agency (MRWPCA) Salinas Valley Reclamation Plant. Phase I will be implemented in There is potential for an extension to Monterey, as well as potential for joint use with Seaside Groundwater Replenishment Project. Interagency agreements are vital to this component. Development of additional groundwater via wells in Salinas Valley groundwater basin. This project is dependent on the Salinas Valley Water Project (SVWP). Deliveries presently limited to users overlying Salinas groundwater basin. Replenish the Seaside Groundwater Basin with recycled water from MRWPCA Salinas Valley Reclamation Plant. Diversions are encompassed by the SVWP. Water will be diverted to the Castroville Seawater Intrusion Project (CSIP) pipelines for distribution and used for urban supply. The location, supply source, and type of well have yet to be determined as part of this analysis. January N-10

11 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT This regional program was then reviewed by the local water and wastewater managers. Through that process, a refined regional program was developed that provides a broader set of benefits while still meeting the regional water needs consistent with the criteria established as a part of this process. The refined regional program incorporates: Additional options for use of recycled water, including o Urban irrigation o Groundwater replenishment o Winter storage and use for increased agricultural irrigation Exchange of delivery of increased surface and stored recycled water for Salinas Basin groundwater Opportunity to use intruded Salinas Basin groundwater as source water for desalination treatment facility Opportunity to obtain electrical power supply from the Monterey Regional Waste Management District s landfill Opportunity to reduce or eliminate treated wastewater discharges to Monterey Bay Addition of U.S. Army as an additional stakeholder and beneficiary with identified water supply need This refined regional program is summarized in Table 9. This program incorporates options for meeting the regulatory and regional water needs. Selection of the specific components that will be utilized to meet the regulatory and regional water needs will be determined based on a number of factors, including: 1. Cost effectiveness and unit cost of water produced 2. Ability to implement 3. Sustainability and reliability 4. Environmental impacts 5. Institutional considerations 6. Public support The recommended approach is shown schematically in Figure 1 and Figure 2. Figure 1 shows the recommended approach maximizing the use of recycled water. Figure 2 shows development of intruded groundwater as a supply for a regional desalination facility, use of Salinas River surface supplies, and increased use of Salinas Basin groundwater supplies. The stormwater, conservation, Seaside Basin ASR, and the Sand City desalination plant components are not shown on these figures. Figure 3 depicts the proposed implementation and decision making process to be utilized in moving forward with the recommended programs. There are a number of components that were evaluated which are currently being implemented; these projects include: conservation and stormwater projects, Seaside Aquifer Storage and Recovery - Phase I and the recycled water component of the Regional Urban Water Augmentation project. The recommended program includes these components and suggests taking advantage of their immediate implementation to begin supplying and replacing water to meet SWRCB Decision requirements and the Seaside Basin Adjudication limitations. On a parallel path, while those projects are implemented, other projects and supply sources will be further developed, evaluated, and implemented in a systematic manner. This approach provides the ability to initiate project implementation of those project components that are ready for implementation. Those project components requiring further refinement prior to implementation will be weighed against each other to establish the components that are most easily implemented at the greatest economic value while minimizing environmental impacts and ensuring supply sustainability. January N-11

12 Monterey Regional Water Supply Evaluation Evaluation Summary Table 9 Recommended Regional Program DRAFT Supply (AFY) Component Replacement Regional Description Conservation This includes an array of conservation measures to be >150 >300 implemented throughout the County. (Weather-Based Smart Irrigation Controller Program, High Efficiency Commercial Clothes Washers, retrofit to high-efficiency toilets, low-flow showerheads, drought tolerant landscape, etc.) Implementation of conservation programs is to begin immediately. Stormwater Cisterns, percolation ponds, etc. Stormwater projects are >300 >500 to begin immediately. Seaside ASR / In-lieu Consists of injecting water from the Carmel River into the Recharge (ILR) Seaside Groundwater Basin. Phase I will be 920 1,400 implemented by Expansion is planned for Sand City Desal Recycled Water Utilization Regional Urban Water Augmentation Project (RUWAP) Seaside Groundwater Replenishment Agricultural Irrigation Salinas Basin Groundwater Salinas River Diversions Regional Desalination Facility Up to 300 Up to 2, Up to 3,000 Up to 2,500 Up to 10,000 (as offset for increased use of Salinas Basin for urban needs) Up to 10,000 Up to 7,800 8,330 8,300 TOTAL 12,500 28,400 ILR will be explored for further development. This project is moving forward and construction will be complete in Recycled water will be produced at the MRWPCA Salinas Valley Reclamation Plant. Phase I will be implemented in There is potential for an extension to Monterey, as well as potential for joint use with Seaside Groundwater Replenishment Project. Interagency agreements are vital to this component. Replenish the Seaside Groundwater Basin with recycled water from MRWPCA Salinas Valley Reclamation Plant. Recycled water would be stored during winter months for recovery and delivery during summer irrigation season. Recycled water would be blended with increased diversions from Salinas River and delivered to an expanded CSIP distribution system to agricultural lands adjacent to the existing CSIP distribution system, consistent with SVWP Phase 2 project description in the SVWP EIR/EIS. Some portion of reduced agricultural groundwater pumping could be utilized to meet domestic water needs. Development of additional groundwater via wells in Salinas groundwater basin. Total yield is a function of delivery of new supply to offset existing agricultural groundwater pumping and modification of existing limitations in use of groundwater within existing basin. Diversions are encompassed by the SVWP. Water will be blended with stored recycled water and distributed to agricultural users in an expanded CSIP system, or diverted to urban users following treatment. The location, supply source, and type of well have yet to be determined as part of this analysis. A combination of the water supply components above would be utilized to meet previously quantified regional water demands in wet, dry, and average water years. January N-12

13 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT Figure 1 Recommended Approach to Maximize use of Recycled Water N W E S Figure 2 Recommended Approach to Development of Potable Water Supplies January N-13

14 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT Figure 3 Recommended Program Implementation/Development Diagram Implement Conservation Implementable? Implement Stormwater 1 Implement Seaside ASR Phase I Implement Recycled Water Develop Salinas Groundwater Supply Y Implement 2 Develop GW Replenishment / Additional Recycled Water Develop Salinas River Supply N N Additional supply required Implement Y Additional supply required Develop Desalination Y Implement Although the CWP proposes to provide an additional 12,500 AFY, the recommended regional program will provide up to 28,400 AFY, the supply analyzed in the Regional scenario. By providing water to areas both in and outside the CalAm service area, more beneficiaries and project champions may participate, as opposed to solely providing the replacement supply to users within the CalAm service area. Also, the broader range of project benefits creates greater opportunities realized and benefits which arise when the projects can share infrastructure, reducing cost. Moreover, some components such as the brackish desalination project will require a collaborated implementation of expanded agricultural irrigation adjacent to the existing CSIP Project service area. This is necessary for both political and hydraulic basin groundwater balance purposes. This approach relies upon interagency cooperation, urban/agricultural symbiotic benefits and shared responsibility in order to maximize reliability and flexibility, minimize cost, and at the same time reduces environmental impacts. There are significant programmatic details needed in order for either of the recommended programs to be fully evaluated as an alternative to the CWP in the EIR. It is recommended that these details be determined during subsequent phases of this regional effort. For instance, location of a regional desalination plant, as well as the type of well and the input supply source are important details that would be analyzed in the next steps of evaluation and implementation. January N-14

15 Monterey Regional Water Supply Evaluation Evaluation Summary DRAFT 5 Next Steps The Replacement and Regional Programs presented in Section 3 are defined at the concept level, and additional refinement is necessary for these programs to move forward. Importantly, the alternative to a local program, the CalAm CWP, is being reviewed by the CPUC in a project level EIR. The present schedule for the CWP EIR is to complete an administrative draft document by approximately June 2008, with a public draft document being complete for distribution by December In order for the local alternative to progress forward, there must be sufficient detail to be included in the CPUC CWP EIR and allow for the direct comparison of the two. This necessitates an aggressive schedule in which the recommended program will have sufficient detail to be included in the administrative draft of the EIR by June The following tasks have been identified in order to fully evaluate and develop an adequate regional water supply alternative to be included in the EIR. Reach out to key decision makers and political leaders regarding the recommended Replacement and Regional Programs to confirm support and identify champions for project development and implementation. Continue meeting with water managers, stakeholders, and work groups to obtain additional feedback and inform the public about the recommended programs. Initiate conservation and stormwater components of the recommended programs in numerous areas throughout Monterey County. Further refine recommended programs by developing the components of the associated programs to obtain necessary details. Develop project cost estimates for each component and program based on a common set of assumptions. Submit sufficiently detailed descriptions of the components included in the recommended programs to the CPUC for inclusion in the CWP EIR. Incorporate the recommended programs into an umbrella Integrated Regional Water Management Plan (IRWMP) that encompasses the four current IRWMPs in the Region (Northern Santa Cruz County area, Pajaro River watershed, Salinas River watershed and Carmel River watershed areas). Evaluate financing and implementation options. Establish implementation relationships between participating agencies. These tasks need to move forward immediately if the local alternative is to be considered in the CPUC EIR for the CWP. January N-15

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17 APPENDICES N-17

18 APPENDI A N-18

19 Compliance with Plus Additional Regional Demands Monterey Regional Water Supply Evaluation Summary Authors: Eric Zigas with ESA Source Source Updated Demand Description PEA Demand (AFY) (AFY) Existing Demand Within CAW Service Area 8,498 MPWMD Technical Memorandum , October_2006: The average annual production (WY ) by Cal Am from the Carmel River (11,015afy) was weather adjusted (by 7.8%) to reflect a weather adjusted average of 11,874afy, minus CalAm's recognized legal rights of 3,376 afy. 10,730 SWRCB Order No. WR 95-10: in 1995, Carmel River diversions were 14,106 afy, which were 10,730 afy greater than CalAm's legal water right of 3,376 afy. 1 Carmel River Replacement MPWMD Technical Memorandum , October_2006: The average annual production (WY ) by Cal Am from the Seaside Basin coastal subareas (3,695afy) was weather adjusted (by 7.8%) to reflect a weather adjusted average of 3,983afy, minus CalAm's eventual allocation of 1,494 afy. 2,489 1,000 CalAm Hydrogeologic Assessment of the Seaside Groundwater Basin included in PEA 2 Seaside Aquifer Replacement 466 MPWMD Technical Memorandum , October_2006: The average annual production (WY ) by Cal Am from the Seaside Basin Laguna Seca subarea (432afy) was weather adjusted (by 7.8%) to reflect a weather adjusted average of 466afy, minus CalAm's eventual allocation of 0 afy. N MPWMD Technical Memorandum , October_2006: Loss of storage capacity in Los Padres that inhibits ability to divert legal Carmel River supply. 272 MPWMD Technical Memorandum , October_2006: Non CalAm Seaside Basin Coastal and Laguna Seca Subareas replacement needs SUBTOTAL 1 and 2 11,730 12,500 (12,487 rounded)

20 Monterey Regional Water Supply Evaluation Summary Authors: Eric Zigas with ESA Description PEA Demand Source Updated Demand (AFY) (AFY) Future Additional Build-Out Demand Within CAW Service Area Source 3 MPWMD City of Monterey City of Seaside City of Carmel-by-the- Sea Numbers in PEA are water demand estimates for the year 2020 as provided by each city to MPWMD in City of Sand City City of Pacific Grove 531 1,264 MPWMD Board Workshop presentation, May 18, 2006: Water demand as provided by the jurisdictions to MPWMD using build-out projections from General Plans and average water use factors. (Note: The updated future estimates include a 20 percent contingency to account for potential future changes in usage rates (rebound). Without this contingency (743af) future demands are estimated at 3,803 afy.) City of Del Rey Oaks Monterey County (unincorporated) 893 1,135 SUBTOTAL 3 Monterey Peninsula Airport District ,572 4,500 (4,546 rounded) SUBTOTAL 1, 2 and 3 15,302 17,000 (Rounded) N-20

21 Monterey Regional Water Supply Evaluation Summary Authors: Eric Zigas with ESA Description PEA Demand Source Updated Demand (AFY) (AFY) Future Demand Outside of CAW Service Area Source 4 Marina Coast Water District 2,400 Fort Ord Base Reuse Plan, ,400 MCWD UWMP Dec 2005: Ord demand under current development restrictions per the Base Reuse Plan. If restrictions are lifted, an additional 4,949 afy would be required by SUBTOTAL 2,400 2,400 5 North County Moss Landing PEA North County 1,500 4,943 North Monterey County Comprehensive Castroville Water District 1,000 Numbers in PEA are water demand estimates based on a preliminary survey conducted by Monterey County Water Resources Agency (MCWRA) 1,000 PEA Water Resources Management Plan, Jan 2002: Replacement water for future overdraft conditions = 4,943 afy PSMCSD 3,000 PSMCSD/Poseidon SUBTOTAL 5 2,570 9,000 (9,013 rounded) SUBTOTAL 1 thru 5 20,272 28,400 N-21

22 Monterey Regional Water Supply Evaluation Summary Authors: Eric Zigas with ESA Other Proposed Urban Water Supply Projects Serving Existing CAW Demands Other projects have been proposed by local water agencies to partially meet local urban water demands within the MPWMD/Cal Am Service Area. They are summarized below. MPWMD Carmel River Water ASR Phase 1 (920afy) MPWMD EIR/EA August 2006 Unaccounted for Water Recovery (300afy) 2% of 14,804 afy Conservation 15% MPWMD prepared the Water Conservation Plan for Monterey County in Since that time, achieved conservation estimates range from 15 percent to 25 percent. This conservation is reflected in existing average demand and therefore is not deducted in this table. Sand City Desalination (150afy) Sand City desalination project is 300 afy. 150 afy of this would supply existing demand. Recycled Water on the Monterey Peninsula (300afy) MCWD Regional Urban Water Augmentation Project SUBTOTAL SUPPLIES (1,670afy) N-22

23 APPENDI B N-23

24 Monterey Regional Water Supply Evaluation Summary Meeting Date Presentation Included Work Group Meeting 1 7/18/07 Work Group Meeting 2 8/22/07 REPOG Meeting 8/29/07 Work Group Meeting 3 9/19/07 REPOG Meeting 9/26/07 Water Managers Meeting 10/24/07 REPOG Meeting 10/31/07 Water Managers Meeting 12/10/07 REPOG Meeting 12/18/07 Materials provided at all other meetings are located at the Center for Integrated Water Research & Division of Ratepayer Advocates Monterey Regional Water Supply Reliability Dialogue website: N-24

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26 Monterey Regional Water Supply Evaluation Summary Work Group Meeting 1 Today s s meeting Regional Project Technical Work Group Regional Urban Water Supply Evaluation Examine identified projects July 18, 2007 Review and obtain consensus on evaluation criteria Presenters: Lyndel Melton Stephanie Hughes Innovative Solutions for Water and the Environment Potential Water Supply Projects in the Greater Monterey Bay Area Urban Water Supply Project Opportunities Santa Clara County Santa Cruz Santa Cruz County Watsonville Pajaro River Monterey Bay San Benito Castroville County Salinas Marina Monterey Carmel By The Sea Identified Projects Desalination Water Recycling Conjunctive Groundwater Management Indirect Potable Conservation Desalination of seawater and brackish groundwater Water recycling Conjunctive ground and surface water management aquifer storage and recovery River Diversions Non-potable and indirect potable recycling Conservation and water use efficiency Stormwater reuse Salinas River Carmel River Soledad N Monterey County Desalination Project Opportunities Coastal Water Project Basic Coastal Water Project Regional Coastal Water Project Alternative Coastal Water Project Basic Coastal Water Project Regional Coastal Water Project Brackish/Intruded GW Desalination Moss Landing Power Plant MRWPCA Monterey Bay Regional Seawater Desalination Project Other Desalination Project Opportunities MCWD Pilot Desalination Project MCWD Regional Urban Water Augmentation Project MPWMD s Sand City Desalination Project City of Sand City Water Supply Project Ocean View Plaza Desalination Project July 18, 2007 N-26

27 Monterey Regional Water Supply Evaluation Work Group Meeting 1 Water Recycling Project Opportunities MCWD Regional Urban Water Augmentation Project Phases I and II MCWD Regional Urban Water Augmentation Project Extension to Monterey Watsonville Area Water Recycling Project Soledad Recycled Water Project Conjunctive Surface and Groundwater Management Project Opportunities Seaside Groundwater Basin Aquifer Storage and Recovery Project Expansion Salinas Valley Water Project (SVWP) SVWP Phase I SVWP Phase II SVWP Phase III Potable Treatment Facility (Seasonal Combination of Desal/River) Other Project Opportunities Indirect Potable Project Opportunities Seaside Groundwater Replenishment Project Evaluation Criteria Monterey Peninsula Integrated Regional Water Management Plan (MP IRWMP) Plan of Study Criteria Conservation and Water Use Efficiency Water Conservation Retrofit Program Water Supply Meet water supply replacement targets SWRCB Order No. WR Seaside Groundwater Basin Final Decision (Case No. M66343) Meet water supply targets for estimated long term future demand Minimize impacts to sensitive species and habitats Maximize use of recycled water Optimize conjunctive use of surface and groundwater Evaluate, advance, and create water conservation efforts Water Quality Meet or exceed water quality standards Improve water quality for environmental resources Protect surface waters and groundwater basins from contamination Meet or exceed recycled water quality targets Minimize impacts from stormwater runoff Improve stream and near-shore water quality July 18, 2007 N-27

28 Monterey Regional Water Supply Evaluation Work Group Meeting 1 Environmental Protection and Enhancement Assess, protect, enhance, and restore natural resources Protect and enhance sensitive species and their habitats Minimize adverse effects on biological and cultural resources Identify opportunities for open spaces, trails and parks Integrate elements from Federal and State species protection and recovery plans Evaluation Criteria Monterey Peninsula Integrated Regional Water Management Plan (MP IRWMP) Plan of Study Criteria Plan of Study Criteria Criteria Summary Address requirements of SWRCB decision Implementable and feasible Reliable during wet and dry periods Dependable over time Dependable in emergency situations Benefits justify cost Provide regional benefits Include the concept water efficiency Provide increased efficiencies during coordinated operations with other components Provide equity and environmental justice Unit Cost Schedule Reliability Permitting Public Acceptance Environmental Regulatory Additional Supply Component Level Programmatic Level RMC s s Next Steps Confirm project details Conduct preliminary evaluation Component screening Program evaluation Present preliminary results at the next meeting July 18, 2007 N-28

29 Work Group Meeting 2 N-29

30 Monterey Regional Water Supply Evaluation Summary Work Group Meeting 2 Regional Project Technical Work Group Regional Urban Water Supply Evaluation Today s s meeting Discuss evaluation approach Review preliminary results Component Evaluation Programmatic Evaluations August 22, 2007 Presenters: Lyndel Melton Stephanie Hughes Obtain feedback and seek consensus on approach Identify next steps and deliverables Innovative Solutions for Water and the Environment Criteria Summary Considerations for Component Criteria Schedule Reliability Permitting Public Acceptance Environmental Regulatory Additional Supply Cost Sustainability Component Level Programmatic Level Schedule: Estimated year of completion? Will the project be implemented in time to supply amount required? Reliability: Does supply depend on precipitation? Is supply sustainable? Permitting: Foreseen permitting issues? Have all necessary permits already been acquired? Public Acceptance: Are there parties that are strongly against the project? Are there parties that strongly support the project? Environmental: High energy consumption? Adverse impacts to fish and surrounding habitats? Considerations for Programmatic Criteria Regulatory: Adequate to meet required supply for Responds to Seaside Adjudication? Additional Supply: Amount in AFY Cost: $$<$$$<$$$$ (estimated) Component Evaluation Projects Evaluated Water Recycling Regional Urban Water Augmentation Project Monterey Extension of Regional Urban Water Augmentation Project Sustainability: Maximize use of fresh water sources, reduce use of desalination August 22, 2007 N-30

31 Monterey Regional Water Supply Evaluation Work Group Meeting 2 Component Evaluation Projects Evaluated Conjunctive Surface and Groundwater Management Seaside Groundwater Basin Aquifer Storage and Recovery (Phase I and Expansion) Salinas Valley Water Project (Phases I, II, and III) Potable Treatment Facility (Seasonal Combination of Desal/River) Salinas Valley Groundwater Basin Replenishment (Desal/Intruded Groundwater) Component Evaluation Projects Evaluated Indirect Potable Seaside Groundwater Replenishment Project Conservation Projects Stormwater Projects Component Evaluation Projects Evaluated Desalination Coastal Water Project Alternative Water Source (Intruded Groundwater) MCWD Pilot Desal Project MCWD Regional Urban Water Augmentation Project CWP Alternative Site (Basic and Regional) MPWMD s Sand City Desal Project City of Sand City Water Supply Project Seawater Conversion Vessel Programmatic Evaluations Supply scenarios Supply necessary to meet regulatory requirements 12,500 AF Regional supply required Regulatory supply + future demands 19,400 AF Programmatic Evaluation 12,500 AFY Recycled Water Water Supply (AFY) Conjunctive Mgmt Seaside ASR / expansion Salinas River Groundwater Replenishment Program A <1, , ,130 B <1, , C <1, , ,630 D <1, ,130 D' <1, ,130 Conservation Stormwater Reuse Desalination Programmatic Evaluation 19,400 AFY Recycled Water Water Supply (AFY) Conjunctive Mgmt Seaside ASR / expansion Salinas River Groundwater Replenishment Program A' 3, ,000 2, ,180 A'' 3, ,200 2, ,130 A''' 3, , ,680 B' 3, ,180 2, C' 1, , ,480 D'' 1, ,980 Conservation Stormwater Reuse Desalination August 22, 2007 N-31

32 Monterey Regional Water Supply Evaluation Work Group Meeting 2 Well Selection Greatly Impacts Desal Evaluations Well Type Source Slant Wells Ocean $1M Collector Wells Ocean $3.5M Vertical Wells Intruded groundwater $250,000 These costs only include installation of an individual extraction well (i.e. no cost of pumps, desal treatment, or O&M) Reliability Permitting Public Acceptance Environmental Cost per installation 1 2 Decision Tree Implement Conservation Implement Stormwater Implement RW Implement Seaside ASR Phase I Develop GW Replenishment Seaside Basin Develop Salinas River Supply Summer & Winter Develop Desalination N Implement Implementable? Implement Additional supply is required Implement Y Y N Additional supply is required Y Example of Incremental Implementation Component Regulatory Regional 1. Conservation Stormwater Recycled Water 1,000 3, Seaside ASR GW Replenish. 2,500 2, Conj. Management 3,200 7, Desalination 4,400 4, Next Steps Obtain feedback Prepare final evaluation matrices Component screening Program evaluation 5 Prepare summary memorandum 4 Present results and recommendations at the next meeting 1 2 Alternative Intake Wells for Desalination Regional Project Technical Work Group Regional Urban Water Supply Evaluation August 22, 2007 Presenters: Lyndel Melton Stephanie Hughes Collector Well Slant Well Innovative Solutions for Water and the Environment Vertical Well August 22, 2007 N-32

33 Work Group Meeting 3 N-33

34 Monterey Regional Water Supply Evaluation Summary Work Group Meeting 3 Regional Project Technical Work Group Regional Urban Water Supply Evaluation Today s s meeting Review water needs Regional water supply gaps CalWater / Salinas Update Review regional approach September 19, 2007 Presenters: Lyndel Melton Lindsey Clark Present recommended program Discuss next steps Innovative Solutions for Water and the Environment Water Supply Gaps within Northern Monterey County Santa Cruz Santa Cruz County Pajaro / Sunny Mesa Moss Monterey Landing North County Bay Castroville Salinas Marina Coast Water District Santa Clara County Pajaro River San Benito County Identified Water Gap (AFY) Area Regulated Future MPWMD 12,500 17,000 MCWD 0 2,400 Castroville 0 1,000 Moss Landing 0 70 North County 0 4,900 Pajaro Sunny Mesa 0 3,000 Salinas 0 0 CalWater Conclusions for City of Salinas Sufficient supply using Salinas Basin groundwater No identified supply gap N Monterey Peninsula Water Mgmt. District Carmel River Salinas River Monterey County Basis for Planning Replacement 12,500 afy Regional 28,400 afy Phased Programmatic Approach Supply scenarios Additional supply necessary to meet Regulatory requirements (95-10 and Seaside Adjudication) 12,500 AF Additional Regional supply required Regulatory supply + future demand (includes demand both in AND outside of the CAW service area) 28,400 AF Objectives of Programmatic Approach to Regional Water Supply Most advantageous for rate payers Meet regulatory and demand schedules Maximize reliability Maximize sustainability Minimize environmental impacts Maximize flexibility for moving forward Provide multiple pathways to successful outcome Continued momentum September 19, 2007 N-34

35 Monterey Regional Water Supply Evaluation Summary Work Group Meeting 3 Regional Water Supply Program Developed Based on Feedback and Input Obtained Project Descriptions Preliminary Project Evaluations Defined Regional Programs Preliminary Program Evaluations Input and Refinement to Programs Program Recommendation Programmatic Evaluation (Updated) REPLACEMENT SUPPLY: 12,500 AFY Recycled Water Recycled Water (irrigation) Groundwater Replenishment Seaside ASR / In-lieu recharge Water Supply (AFY) Conjunctive Management Salinas River Salinas Basin Groundwater Program A 300 2, , ,400 B , C 300 2, ,330 D ,830 D' ,830 Conservation Stormwater Reuse Desalination Programmatic Evaluation (Updated) REGIONAL SUPPLY: 28,400 AFY Recycled Water Recycled Water (irrigation) Groundwater Replenishment Water Supply (AFY) Conjunctive Management Seaside ASR / In-lieu recharge Salinas River Salinas Basin Groundwater Program A' 3,000 2,500 1,400 3,930 4, ,470 A'' 3,000 2,500 1,400 7,800 4, ,600 A''' 3, ,400 11, ,680 B' 3,000 2,500 1,400 16,100 4, C' 1,700 2,500 1, , ,700 D'' 1, , ,500 28,400 AFY includes 12,500AFY Replacement supply PLUS future and regional demand. Conservation Stormwater Reuse Desalination Recommended Program with Incremental Implementation Plan Santa Clara County Santa Cruz Santa Cruz County Component Regulatory Regional 1. Conservation >150 > Stormwater >300 >500 Pajaro / Sunny Mesa 3. Seaside ASR Moss Monterey Landing North County 4. Sand City Desal Bay San Benito Castroville 5. Recycled Water 300 3,000 6 County Salinas Basin GW 0 4,300 Salinas 7. Seaside ASR/ ILR Marina 5 Coast 4 Water District 8. Seaside Replenish 2,500 2, Salinas River 0 7,800 8 Monterey Peninsula Water Regional Desal 8,030 8,300 Mgmt. 7 District N Carmel River Pajaro River Salinas River Monterey County Recommended Program with Incremental Implementation Plan Component Santa Cruz Santa Cruz County Regulatory Regional 1. Conservation >150 > Stormwater >300 > Seaside ASR Sand City Desal Recycled Water 300 3, Salinas Basin GW 0 4, Seaside ASR/ ILR Seaside Replenish 2,500 2, Salinas River 0 7, Regional Desal 8,030 8,300 Moss Monterey Landing North County Bay Castroville Salinas 10 Marina 5 Coast 4 Water District 8 Monterey Peninsula Water 3 Mgmt. 7 District Pajaro / Sunny Mesa Santa Clara County Pajaro River San Benito County Recommended Program with Incremental Implementation Plan Component Santa Cruz Santa Cruz County Regulatory Regional 1. Conservation >150 > Stormwater >300 > Seaside ASR Sand City Desal Recycled Water 300 3, Salinas Basin GW 0 4, Seaside ASR/ ILR Seaside Replenish 2,500 2, Salinas River 0 7, Regional Desal 8,030 8,300 Moss Monterey Landing North County Bay Castroville Salinas 10 Marina 5 Coast 4 Water District 8 Monterey Peninsula Water 3 Mgmt. 7 District Pajaro / Sunny Mesa Santa Clara County Pajaro River San Benito County Immediate Implementation N Carmel River Salinas River Monterey County Complete Interagency Agreements N Carmel River Salinas River Monterey County September 19, 2007 N-35

36 Monterey Regional Water Supply Evaluation Summary Work Group Meeting 3 Recommended Program with Incremental Implementation Plan Component Santa Cruz Santa Cruz County Regulatory Regional 1. Conservation >150 > Stormwater >300 > Seaside ASR Sand City Desal Recycled Water 300 3, Salinas Basin GW 0 4, Seaside ASR/ ILR Seaside Replenish 2,500 2, Salinas River 0 7, Regional Desal 8,030 8,300 Moss Monterey Landing North County Bay Castroville Salinas 10 Marina 5 Coast 4 Water District 8 Monterey Peninsula Water 3 Mgmt. 7 District Pajaro / Sunny Mesa Santa Clara County Pajaro River San Benito County Recommended Program with Incremental Implementation Plan Component Santa Cruz Santa Cruz County Regulatory Regional 1. Conservation >150 > Stormwater >300 > Seaside ASR Sand City Desal Recycled Water 300 3, Salinas Basin GW 0 4, Seaside ASR/ ILR Seaside Replenish 2,500 2, Salinas River 0 7, Regional Desal 8,030 8,300 Moss Monterey Landing North County Bay Castroville Salinas 10 Marina 5 Coast 4 Water District 8 Monterey Peninsula Water 3 Mgmt. 7 District Pajaro / Sunny Mesa Santa Clara County Pajaro River San Benito County Continue Evaluation N Carmel River Salinas River Monterey County Opportunity for Regional Potable Treatment Facility N Carmel River Salinas River Monterey County 1 2 Implementation Decision Process Implement Conservation Implement Stormwater Implement Seaside ASR Phase I Implement RW Develop Salinas Groundwater Supply Develop GW Replenishment Develop Salinas River Supply N Implement Implementable? Implement Additional supply required Develop Desalination Implement Y Y N Additional supply required Y Next Steps for Regional Program Planning Complete Phase I Prepare Summary Memorandum Approach Component screening Program evaluation Recommended program Initiate Phase II Submit for EIR analysis and IRWMP Identify champions for project implementation and development Develop regional support Coordinate conservation and stormwater programs Further evaluate Phase II components Quantify project and program costs Evaluate financing and implementation options Regional Project Technical Work Group Regional Urban Water Supply Evaluation September 19, 2007 Presenters: Lyndel Melton Lindsey Clark Innovative Solutions for Water and the Environment September 19, 2007 N-36

37 REPOG Meeting December 18, 2007 N-37

38 Monterey Regional Water Supply Evaluation Summary REPOG Meeting Monterey Regional Water Supply Program Regional Water Supply Plan Meets Water Needs While Providing Regional Benefits Clean-up Intruded Expand Groundwater Agricultural Meet Regional Deliveries Water Supply Eliminate Wastewater Disposal Needs Use 100% of Recycled Water Utilize Available Surface Water Use Landfill Power 2 December Regional Water Supply Plan Addresses Gaps in Northern Monterey County Regulatory Regional Moss Landing Pajaro-Sunny Mesa Castroville 70 AFY 3,000 AFY 28,400 AFY MCWD 1,000 AFY 12,500 AFY MPWMD 2,400 AFY 4,500 AFY 12,500 AFY 3 North County 4,900 AFY Recommended Program Provides Incremental Implementation Component Conservation Stormwater Seaside ASR City of Sand City Desal Seaside ASR/ ILR Recycled Water Salinas Basin GW Seaside Replenish Salinas River Diversion Regional Desalination On-Going Efforts 4 Recommended Program Provides Incremental Implementation 5 Recommended Program Builds Upon Previous Efforts 6 Component Conservation Stormwater Seaside ASR City of Sand City Desal Seaside ASR/ ILR Recycled Water Salinas Basin GW Seaside Replenish Salinas River Diversion Regional Desalination Next Steps Seaside ASR City of Sand City Desal Marina Coast Desal Seaside ASR/ ILR Recycled Water Salinas Basin GW Seaside Replenish Salinas River Diversion Regional Desalination December 18, 2007 N-38

39 Monterey Regional Water Supply Evaluation Summary REPOG Meeting Seawater has Intruded a Significant Portion of the Sallinas Groundwater Basin Monterey Bay Seawater Intrusion in the 180 Foot Aquifer Marina Former Fort Ord Castroville Salinas 7 Development of Salinas Basin Supplies must Consider Impacts to Groundwater Primary Supply for 250,000 residents 200,000 acres of irrigated agriculture Management of basin to stop and control seawater intrusion Salinas Basin 180ft Aquifer 400ft Aquifer 8 11 Creation of an Environmental Park 9 Recycled Water Can be Used for Urban and Agricultural Irrigation 10 Expanded CSIP Urban Irrigation Winter Storage Urban Irrigation Up to 3,000 AFY Ag Irrigation Up to 10,000 AFY Storage Up to 10,000 AFY Recycled Water Can be Used for Urban and Agricultural Irrigation Salinas Basin 11 Recycled Water Storage would be Above the Salinas Valley Groundwater Aquifer Surface, 120 MSL Possible Cutoff Wall 12 Recharge Basin Sands Expanded CSIP 180ft Aquifer 80 MSL Silty Sands & Sands Urban Irrigation Winter Storage Urban Irrigation Up to 3,000 AFY Ag Irrigation Up to 10,000 AFY Storage Up to 10,000 AFY 400ft Aquifer Clay 30 MSL -2-foot Aquifer Salinas Valley Aquitard -2 MSL Salinas Valley Aquifers thick Salinas River December 18, 2007 N-39

40 Monterey Regional Water Supply Evaluation Summary REPOG Meeting Recycled Water Can Also be Used for Seaside Basin Augmentation 13 Delivering Recycled Water Provides Basis for Using Intruded Groundwater for Desal 14 Brine Disposal via MRWPCA Outfall Salinas Basin 2,400 AFY to Seaside Basin Desalination Treatment Facility Regional Supply 12,000 AFY 180ft Aquifer 400ft Aquifer Desal Approach Provides Added Benefit of Cleanup of the Salinas Groundwater Basin 15 Delivering Recycled Water to Ag Allows Use of Groundwater for Urban Uses Salinas Basin 16 Monterey Bay Castroville Seawater Intrusion in the 180 Foot Aquifer Marina 180ft Aquifer Former Fort Ord Salinas From Irrigation Offset 5 to 10,000 AFY Other In-Basin 8,000 AFY 400ft Aquifer 11 Salinas River Supplies from SVWP Phase 2 Could Also be Used to Meet Urban Needs 17 Electrical Power from Regional Landfill Reduces Costs and Emissions, Improves Sustainability 18 Salinas Basin 180ft Aquifer SVWP Ph. 2 Winter Diversion 5,000 AFY 10,000 AFY 400ft Aquifer December 18, 2007 N-40

41 Monterey Regional Water Supply Evaluation Summary REPOG Meeting Total Program Provides a Sustainable Supply that Meets Regional Needs 19 Regional Water Program Will Address Regulatory and Regional Water Needs Expanded CSIP Salinas Basin 180ft Aquifer Regulatory 12,500 AFY Regional 28,400 AFY Component Evaluation Regional Partnerships Yield and Sustainability Economic Analyses 400ft Aquifer 20 Regional Program Provides Significant Regional Benefits Meet Urban Water Supply Needs Improve Agricultural Water Supplies Enhance Protection of Salinas Groundwater Basin Utilize 100% of Available Recycled Water Eliminate Nutrient Discharge to Monterey Bay Reduce Carbon Footprint Increase Sustainability Reduce Environmental Impacts Reduce Incremental Cost of Water 21 Monterey Regional Urban Water Supply Program MARINA COAST WATER DISTRICT December December 18, 2007 N-41