ITEM: ACTION ITEMS
18. DISCUSSION OF NEAR TERM WATER SUPPLY CONCEPTS, INCLUDING RECLAMATION
Meeting Date: January 29, 2004 Budgeted: N/A
Program/Line Item No.: N/A
Staff Contacts: Henrietta Stern Cost Estimate: N/A
General Counsel Approval: Staff note provided for review
Committee Recommendation: PAC/TAC reviewed on January 28, 2004
CEQA Compliance: Not needed for discussion; CEQA needed for new projects
Ø Paralta well community drought reserve;
Ø Conservation savings;
Ø Aquifer storage and recovery (ASR) in Seaside Basin;
Ø In-lieu recharge in Seaside Basin
Ø Emphasis should be on the sections of this staff note titled, “Overall Summary and Concepts for Consideration” and “Specific Allocation Concepts” found on the final four pages of main text for this item.
BACKGROUND AND DISCUSSION: The following text addresses potential sources of supply that some have suggested be pursued in the immediate future. This agenda item originally focused on reclamation, but has been expanded to review other concepts and potential courses of action for consideration.
OVERVIEW OF WATER SOURCES THOUGHT TO BE AVAILABLE NOW:
Based the information in Item 17, it must be stressed that SWRCB Order 95-10 sets established Cal-Am production limits from the Carmel River system that are not likely to change for many years. More importantly, the one-for-one replacement component of the Order requires that any new source of supply be used to offset pumping from the Carmel River until the entire unlawful amount is replaced; no portion of the new water may be used for new construction and remodels. Any water augmentation concept must be consistent with Order 95-10. In addition, litigation over the Seaside Basin will likely result in Court-ordered limits to production; it is unknown whether these limits will be the same or less than today’s limits imposed by MPWMD. Given the recent hydrologic trends, it is unlikely that production limits will increase unless there is a successful recharge program or other means to reverse the declining water levels.
Another important concept is that the conceptual “sources of water” suggested by various parties are not actual physical sources of water. There appears to be a misconception that water is actually being withheld and stored in some undisclosed location, and needs to be released. This is not accurate. Unless noted otherwise, all sources of water described below are already part of the Cal-Am system that draws from the Carmel River and Seaside Basins. As noted in Item 17, water may have been available from certain Cal-Am system components in the past, but is not legally (or in some cases, physically) available now.
Pebble Beach Wastewater Reclamation Project—Benefited Properties (380 AF)
As described in Item 17, up to 380 acre-feet annually (AFA) of Cal-Am water for designated “benefited properties” within the Del Monte Forest are acknowledged by the SWRCB to be additive to the 11,285 AF interim diversion limit as new properties are served. This quantity was based on the assumption that the Reclamation Project would replace 800 AFA of potable Cal-Am supply used to irrigate turf on golf courses and sports field within Del Monte Forest. It is important to note that the goal is not simply to produce 800 AFA of reclaimed water. Rather, the goal is to enable replacement of 800 AFA of Cal-Am potable water; that is, to reduce the need for the irrigators to apply Cal-Am water, resulting in close to zero use. This distinction is important, because if the reclamation plant is producing close to 800 AFA, but potable Cal-Am water is still being applied to turf, the net benefits are reduced by the quantity of Cal-Am use (see below). Calculations on how well the project is performing should be based on how well Cal-Am water use is minimized rather than the total reclaimed water production of the plant. Obviously, increasing reclaimed water production is an important factor in reducing Cal-Am use.
Since 1996, the average reclamation plant production has been about 680 AFA of reclaimed water. Limited production is due to a combination of factors, including weather (need less irrigation water in rainy years), storage limitations (reduces ability to supply water in summer peak demand periods) and water quality concerns (sodium in the reclaimed water harms the greens and tees as it collects in the root zone). More importantly, the average Cal-Am potable water application in this same period was about 280 AFA. This water was used to flush the sodium from the root zone under the greens as well as make up for supply shortfalls in summer.
As noted above, the key factor to assessing performance is to calculate the net savings in potable Cal-Am water used. A key assumption (which may or may not hold true each year) is that 800 AFA of water are needed, on average, to irrigate turf in the project area. The number of acre-feet of Cal-Am water replaced is compared without and with the reclamation project, as follows:
Pre-project: 800 AFA estimated average Cal-Am water applied to turf;
Post-project: 280 AFA average Cal-Am water actually applied to turf;
Net Savings: 520 AFA average Cal-Am water that is no longer used on turf.
A Phase 2 project is proposed to facilitate increased reclaimed water use, and thereby reduce the need to irrigate turf in the project area with Cal-Am water. The project entails over $20 million to retrofit a storage reservoir and construct advanced treatment facilities to more efficiently use the reclaimed water and reduce the need to apply Cal-Am water. The MPWMD, in coordination with the Carmel Area Wastewater District, Pebble Beach Community Services District, Pebble Beach Company, and other reclaimed water users, are developing agreements to facilitate financing of the Phase 2 project. MPWMD Ordinance No. 109 addresses the project financing as well as release of a portion of the 380 AFA for additional properties within the Del Monte Forest. Ordinance No. 109 is scheduled for consideration in March 2004, along with negotiated “deal points.” An update on the progress of Ordinance No. 109 negotiations will be provided at the January 29, 2004 Board meeting.
Pebble Beach Wastewater Reclamation Project—MPWMD Share (420 AF)
In addition to the 380 AF described above, the original reclamation project included a 420 AF share going to MPWMD for use at its discretion, assuming reliable replacement of 800 AFA of Cal-Am potable water with reclaimed water. Importantly, the 420 AF is not recognized by the SWRCB as a source of supply to add to the 11,285 AF interim diversion limit. As noted above, the project has been replacing an average of about 520 AFA of Cal-Am supply to date, which is about a 280 AFA “shortfall” below the 800 AFA replacement goal. District staff believes it would not be prudent to consider release of any more than 140 AF of the 420 AF District share at this time (420 – 280 = 140).
Notably, in August 1996, the District approved Ordinance No. 84 to release 150 AF of the 420 AF. The ordinance was rescinded due to litigation filed against the District because Ordinance No. 84 was approved without an EIR. In order for the District to approve “release” of Cal-Am water as a portion of the 420 AF, an EIR would need to be prepared, and Cal-Am Carmel River diversions must not exceed 11,285 AFA. There is uncertainty whether release of any portion of the 420 AF would be challenged unless the Reclamation Project was producing 800 AFA reliably and Cal-Am water application on the golf courses was closer to zero. Recall that Cal-Am supplies water for new construction and remodels from Carmel River and Seaside Basin sources. Reclaimed water can only be used for irrigation, and is not considered to be a source of domestic potable supply.
Release of Community Drought Reserve from Paralta Well (385 AF)
In 1993, when allocations from the Paralta well were approved, 385 AFA of production were set as aside as a “community drought reserve.” It has been suggested to tap some of this “set aside production” to provide additional allocations to jurisdictions. Unfortunately, this is not possible for several reasons.
First, though the term “drought reserve” gives the impression that a portion of the annual production from the Paralta well was held back, this is not accurate. The “drought reserve’ actually refers to production from the Carmel River that was not being pumped due to the existence of the Paralta well. In reality, the Paralta well produces water at the maximum rate that can be treated at Cal-Am’s Seaside Ozone Treatment Plant. The Paralta well was initially estimated to produce 1,000 AFA of firm yield. Actual production has exceeded this estimate, and in this sense, the 385 AFA “reserve” has already been tapped to meet current demand and stay below the SWRCB limits in Carmel Valley. Thus, no additional supply is available from the Paralta well based on expanding its production capability.
Second, even if additional production capacity were available, existing limitations in the Cal-Am distribution system would likely further restrict additional water volume from being transported to customers. Cal-Am investment in its Seaside Basin infrastructure is needed to facilitate greater pumping capacity.
Third, even if there were no physical limitations on pumping capacity, the current hydrologic and legal situation in the Seaside Basin would likely constrain how much water may be produced at or near the Paralta well site (which is where the greatest impacts occur) in order to not exacerbate the trend of declining water levels. Recall that production is at or near the estimated 4,375 AFA safe yield estimate for the Coastal Subareas.
Fourth, a new well in a location other than the Paralta area would be a likely means to reduce existing adverse effects, but may not increase reliable yield. A new source of supply, however, triggers the SWRCB Order 95-10 one-for-one requirement.
A fifth reason involves a formal policy statement adopted by the MPWMD Board in February 1997. Current MPWMD policy specifically prohibits the future allocation of water previously set aside for drought reserve from the Paralta well (Exhibit 18-A). Even with the absence of the reasons enumerated above, a formal change to this policy would be needed before consideration of allocating additional Paralta water.
In summary, additional production from the Seaside Basin should not be contemplated at this time due to the current physical status of the Basin, the legal uncertainties as well as the current limitations of the Cal-Am infrastructure. Cal-Am production in recent years has been closer to 3,500 AFA, and has enabled the community to stay within the estimated safe yield of 4,375 AFA for the Coastal Subareas. New production would thwart these efforts.
Allocation of water from the Seaside Basin could be considered at some point in the future when: (a) legal issues are resolved; (b) more refined reliable yield limits are defined for individual aquifers and subareas within the Seaside Basin; (c) evidence of stabilized water levels in the Seaside Basin is available; and (d) Cal-Am system improvements and operational changes are made to facilitate increased production and distribution.
The District began a long-term conservation program in 1987 with a 15% reduction goal. To date, an estimated 2,040 AF have been permanently saved through District programs. The program fosters increased conservation awareness and several ordinances/programs that encourage and/or require water-saving habits and fixtures. Cal-Am production in water year 1987 was 18,117 AF as compared to an average of 14,500 AF in the past five years, a decrease of 20%. This reduction is significant in light of the fact that the number of Cal-Am customers rose from 33,708 connections in 1987 to 39,177 connections in 2002, a 16% increase. Notably, five of the last six years have been normal or above normal rainfall years. Conservation to date has allowed the community to stay below the SWRCB limit, and has allowed more people to use reduced resources (15,285 AFA maximum from Carmel River and Seaside Basin sources).
It has been suggested to tap some of the conservation savings. Concerns include greater risk of exceeding set resource limits if more people “join the lifeboat” as well as how more rigorously people can conserve without creating hardship. Conservation is relatively volatile as compared to physical solutions due to changing weather and economic patterns, and human behavior. Again, conservation savings are not a new physical supply of water—all Cal-Am water stems from the Carmel River and Seaside Basins. For these reasons, conservation should not be used as a “source” of water.
OTHER POTENTIAL SOURCES OF NEAR-TERM SUPPLY:
The following sources might be available in the future. All would require environmental review under CEQA, as well as significant state (and possibly federal) permits.
Aquifer Storage and Recovery (ASR) in Seaside Basin
The MPWMD has been studying the ASR concept since 1996. The concept entails diverting excess winter flows from the Carmel River Basin, and transporting the treated water by pipeline to the Seaside Basin, where the water is injected into specially-constructed ASR wells, for later recovery during dry periods. In May 1998, the District constructed a pilot injection well in the Paso Robles aquifer of the Seaside Basin. Based on promising results of injection testing in 1999 and 2000, the District constructed a larger, deeper injection test well, known as the Santa Margarita Test Injection Well (SMTIW) in April 2001 on the former Fort Ord. The Santa Margarita aquifer is more productive, and is therefore more conducive to a full-scale ASR project.
Under a series of temporary water right permits from SWRCB, 596 AF were injected at the pilot well in 1998-2002, and 345 AF were injected at the full-scale site in 2001-2003, for a total of 941 AF injected at both wells to date. Notably, this water would have flowed to the ocean if the MPWMD program had not been in place. Instead, it is stored in the Seaside Basin, and is available for use. Much has been learned about the hydraulic response of these two target aquifers, as well as various operational and maintenance issues that would be attendant to a full-scale ASR project in the basin. A principal finding from this testing is that ASR wells completed in the Paso Robles aquifer, although less expensive to construct, would be limited to fairly low injection capacities of approximately 350 gallons per minute (gpm), whereas Santa Margarita aquifer ASR wells are capable of injection capacities of about 1,500 gpm, and extraction capacities of 3,000 gpm or more.
Water Year (WY) 2002 was the first season during which a significant quantity of Carmel River Basin water was injected into the full-scale SMTIW (i.e., 175 AF). Accordingly, the District worked with Cal-Am to seek approval from the California Department of Health Services (CDHS) to recover the injected water for delivery back into the Cal-Am distribution system, as a means to evaluate recovery efficiency and chemical interactions during storage. Due to concerns about the fate of disinfection by-products in the recovered water, CDHS approval was not issued in 2002, but was issued upon completion of additional water quality testing for a limited period in 2003. A total of approximately 440 AF was recovered during this period, which is about 130% of the volume injected into the Santa Margarita aquifer since the SMTIW well was completed. This means that 345 AF of water (Carmel River source) were recovered and delivered to the community, that would not have been available if the ASR program did not exist. Extensive water quality sampling was conducted during recovery. Results indicate that the recovered water was a blend of injected Carmel River system water and native groundwater, and that the recovered water retained some chemical imprints of the Carmel River system water even after 100% of the injected volume was removed. This suggests that injection is capable of “conditioning” the aquifer beyond the original volume injected, and reducing the occurrence of hydrogen sulfide in the native Seaside groundwater, which is an ancillary benefit of the ASR program.
Engineering feasibility evaluations performed in association with the MPWMD desalination project EIR indicated that ASR is most promising at a smaller scale (maximum of about 1,300 AFA production), as a project that size can rely primarily on existing Cal-Am facilities. A larger project that would require extensive new extraction, treatment, transmission and injection facilities was not deemed to be cost-effective by the consultants.
A full-scale project must obtain long-term water rights permits from the SWRCB as well as several permits from other agencies. The District has filed a water rights application with the SWRCB for a long-term ASR project. Importantly, an ASR project must still comply with the one-for-one aspect of Order 95-10, and thus could not be used for new construction and remodels. However, ASR is worthwhile to pursue because it can help stem the declining water levels in the Seaside Basin by “filling the groundwater trough” that exists due to current pumping practices.
In 2003, the District asked SWRCB executive staff to consider amending Order 95-10 to mitigate adverse impacts to the Seaside Basin that are consequences of the Order. Specifically, the District requested that the SWRCB consider approval of “in-lieu recharge.” This concept entails additional use of the Carmel River by Cal-Am (i.e., divert more than 11,285 AFA) in wet years, when Carmel River flow is plentiful, so that pumping from the Seaside Basin can be reduced to allow the Seaside Basin to “rest” and recharge. A related Water Availability Analysis prepared by MPWMD for the SWRCB shows that up to 7,200 AFA is available in average years, and over 10,000 AFA is available in wet years. In-lieu recharge would be most effective in May and June, when the river would still be flowing at relatively high rates. The SWRCB staff is currently preparing a letter responding to the District’s request, which should be received in early 2004. Conceptually, in-lieu recharge could facilitate greater use of the Seaside Basin by Cal-Am in dry years to avoid use of Carmel River water. Such a scenario would allow greater operational flexibility to respond to changing weather cycles.
OVERALL SUMMARY AND CONCEPTS FOR CONSIDERATION:
Based on the background information provided in Items 17 and 18, the MPWMD Board should review and discuss the following concepts:
1- Recognize Limits Have Been Imposed on Our Community
Water supply planning since the 1980s has been “bottom-up”—that is, how can we best combine various water supply sources to determine the Allocation Program Cal-Am production limit. This way of thinking does not apply to today’s reality since SWRCB Order 95-10 was issued in 1995. We are now operating under a “top down” system. The SWRCB has limited Cal-Am’s Carmel River diversions to 11,285 AFA with only one exception — entitlement water for Pebble Beach up to 380 AFA. Current MPWMD Rules and Regulations set a Cal-Am production target of 4,000 AFA from the Seaside Basin, but cooperative Cal-Am/MPWMD efforts in recent years have focused on a 3,500 AFA planning target. With this in mind, the current “water pie” (Cal-Am production limit) is limited to 15,285 AFA (11,285 + 4,000 = 15,285) until some significant new physical source of water is developed that first offsets the unlawful Carmel River diversion described in SWRCB Order 95-10 (10,730 AF estimated). However, prudent (lower risk) planning suggests that the “water pie” should actually be no larger than 14,785 AFA Cal-Am production (11,285 + 3,500 = 14,785) under the existing production and management conditions, and the legal situation in the Seaside Basin. A larger amount could be considered when Seaside Basin concerns are resolved.
2- Recognize Misconceptions About Available Water Sources
Some have mistakenly characterized that there are physical “pots of water” waiting to be used. This is not accurate. The only supply sources for the Cal-Am system are the Carmel River and Seaside Basins. “Releasing water” from reclamation or conservation savings does not provide a new physical source of supply; it is the same Cal-Am system. Even if it were an actual new physical source of supply, then SWRCB Order 95-10 restrictions (one-for-one) would limit use. Other physical and regulatory limitations to the Cal-Am system constrain current production as compared to capacities in the past.
3- Prepare an EIR on the Water Credit Transfer EIR With Ordinance No. 101 As the Proposed Project
Ordinance No. 101 was crafted in a cooperative setting to address concerns about the current Water Credit Transfer Program. An EIR should address whether the program would result in increased water use and other adverse effects to the environment. Alternatives could include no transfer program and the current transfer program (Rule 28-B). Certification of a properly prepared EIR, resulting in new ordinances governing a Water Credit Transfer Program, may be the first available means to enable new connections in the community. Given the previous extensive RFP process, the District could retain a sole-source consultant or issue a rapid-response RFP to the best three firms reviewed in 2003.
4- Prepare an EIR on the MPWMD Water Allocation Program Based on Existing Limits and Current Water Use Trends
District Counsel has advised that releasing water for new construction and remodels must entail a new EIR on the Water Allocation Program. The EIR should address the changes that occurred in 1995 with Order 95-10 as well as other significant changes such as the Endangered Species Act (ESA) listing of steelhead and red-legged frogs in the Carmel River. Key questions for discussion include:
It is notable that whenever an EIR is prepared, current limits and allocations could change, as occurred as the result of the 1990 EIR. The existing remaining allocation amounts, as tabulated in MPWMD monthly reports (Exhibit 17-A), could be affected by the new production limits and distribution formulas that emanate from a new EIR. The 156 AF estimated jurisdiction allocation amounts are not entitlement water, and can be changed or removed through an EIR process. These quantities will remain available for use until a new EIR is certified and ordinances creating a new system are approved. The Water Allocation Program EIR will need to calculate a reasonable estimate of how much of the 156 AF is expected to be used before the EIR is certified, and incorporate that information into all environmental assessments. The use of all or part of the 156 AF currently “on the books” will affect the total amount of water available to allocate.
A key future issue is how to ensure jurisdictions do not exceed their allocation limit. Discussion of the best means to achieve this goal includes the concept of the jurisdictions being responsible for staying within their limit. This raises implementation issues that would need to be addressed, such as monitoring water use, data tracking and management, enforcement, agency responsibilities, etc. Extensive discussion is assumed to occur in the future regarding these issues.
SPECIFIC ALLOCATION CONCEPTS:
Based on the information in Items 17 and 18, the following allocation concepts are offered to foster discussion by the MPWMD Board:
18-A: February 1997 Board Policy statement on use of Paralta drought reserve
U:\staff\word\boardpacket\2004\2004boardpacket\20040129\ActionItems\18\item18.doc HS 1/22/04