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ONW H• IQO O rt j FJ n 1 O rs rt rt o m N d' 7 N rt H ( D ( D rot (( DD ri ro pPe w H F= J om ro rt z c a ro rt O o W n o He D H• He D En rt 17J DD a; rtt He rt Qq m C7 H• HeH n O He n rt n F- I r 0 0 H N O: J ri aq DW rt D FA N O HeT W W D He d n n Qq tii C7 H w w tz In H W He In r w% ft 00 rt Ho O O O o 0000 Tq rt in z z rod 5 rn rt rot o w o rt cn D C7 a N j j O VO rb m rn H N W V Ul H o rn V N O W O w O 00 W O W N 00 Fi 1% 4 O rn He rn n Xc• k' W C) W 0 In F I h V V N 00 w ro D o w 0 a N O O v V 00 D O a m rat C rot W d N ( D ' d n rt a Ea ri W W H• O En m m rt go ri ( D Ft ri H H H7 W He n En rt H ri O Ln rt Fit m Pd O n w t7 W CD w o• C rt t7 rNt W wrhUA He ( Drt O b rt r( D t h O ' ( n Fi (D FD N t7 ri a C0 H m a w w O C n rt a w ro N H n O H O d C o H r zz H l supply the Valley. The Board then put forth the attached proposal to the City of Dublin which would split the cost of the project in half between the City of Dublin and DSRSD. Dublin's costs would be partially offset by the normal water charges and the savings in park fertilization as the recycled water provides nutrients in excess of those presently manually spread in the park. DSRSD Proposal The DSRSD proposal is attached as Exhibit 1. It includes: l) Providing the Dublin Sports Ground with recycled irrigation water of a quality to meet Public Contact Standards and a quantity to equal Dublin's current use. 2) The cost to Dublin to be $40,072 per year, to escalate at one-half the rate of the potable water increases, and Dublin would be charged for water quantities in excess of the current use (57 acre-feet/year) at 90% of the normal potable water charges. Metering and permitting costs are included, and no separate charges will be made to the City of Dublin. 3) Dublin would be committed to a 10-year time frame. 4) DSRSD would be responsible for the permitting, construction, and maintenance of the system. Staff Analysis The DSRSD proposal estimates an annual cost savings in fertilizer needs for the Park of $7,000 because the nutrients in the recycled water are far in excess of those presently being mechanically placed on the Park. This would be true if the spreading operation only included fertilizer. However, chemical weed control is applied at the same time and this would need to continue. Staff estimates the savings due to the elimination of mechanically spread fertilizer and weed control to be $2,333 per year instead of $7,000. In addition, because of the increased level of fertilization, Staff estimates that the frequency of turf mowing would need to be increased by 50%, or an additional $17,000 per year. The DSRSD Board has discussed the possibility of a levy of $1 per equivalent single family meter for all customers in the District to help pay for DSRSD's one-half share of this project. If this goes into effect, the City would be assessed $2,754 per year based on the 47 water meters owned city-wide. The benefit to the City by entering into this project is that, should mandatory rationing go into effect, the City would be allowed a potable water allotment transfer from the Dublin Sports Grounds' four-inch meter to the City's other parks and medians to help keep the landscaping and turf alive. The project also has the benefit of reducing the dependency of the Valley on State-supplied water. Due to the increased nutrients on the Dublin Sports Grounds, the turf should be a thicker, more healthy grass surface to play on. The project would also serve as a visible demonstration to the community of the use of recycled water. The proposal calculated an interest cost of 8% based on an estimated borrowing market at the time it was tendered. Since then, the rate at which public agencies can borrow money has been substantially reduced. Recommended Counter Proposal To offset some of Dublin's added cost over the normal cost of potable water, Staff would propose the following modifications to the DSRSD proposal as a counteroffer to DSRSD: l) That DSRSD explore the feasibility of and pursue contracting with other potential users for recycled water from the same equipment anticipated in this proposal. Further, that the income from other users that reduce the cost of the proposed project be split between DSRSD and the City to help reduce the City's added cost of the project. 2) That after 10 years, a new analysis be made of the costs of keeping up the system and that the City's rates be reduced to reflect operating cost savings, but in no case would the City's costs for recycled water be higher than that outlined in the existing proposal. 3) That the City not incur any costs in the hookup of the recycled water system to the present park distribution system. 4) If DSRSD is not able to continuously provide the necessary water quality, quantity, or flow necessary to maintain the Dublin Sports Grounds, the City could use potable water through the existing meter at no additional charge. 5) That inasmuch as the City will be subsidizing this project already, any new DSRSD increased charge for the recycling project (such as a one dollar meter charge) not be applied to the City of Dublin. 6) That the City be charged the flat rate irrespective of the amount of recycled water used from this project. 7) That Dublin's base operational cost escalate at the portion of the DSRSD rate increases which relate to operational costs only. The portion of the base cost related to capital or water purchase not be subject to increase. 8) That the proposed base annual cost of $40,072 be reduced to reflect the reduction in the present market rate for borrowing capital by public agencies for similar size and type of projects. It is anticipated that once both parties agree to the elements of the proposal and response, formal documents will need to be drafted for approval by the DSRSD Board and the City Council. a:ksept~recyh2o DUBLIN SAN RAMON SERVICES DISTRICT May 8, 1991 Mr. Richard Ambrose City Manager, City of Dublin 100 Civic Plaza Dublin, CA 94568 Dear Mr. Ambrose: Following our preliminary discussion April 19th of a proposal to replace potable water with advanced treated recycled water for irrigation of the Dublin Sports Grounds, I presented this matter to the District Board of Directors. This letter is to offer for your consideration a draft proposal that received strong support when discussed at the regular Board meeting of May 7, 1991. The provisions of the District's offer are as follows: DRAFT PROPOSAL FOR RECYCLED WATER FOR THE DUBLIN SPORTS GROUNDS MAY 8, 1991 By: To: Dublin San Ramon Services District City of Dublin PROJECT: Service: To provide recycled water to meet California Department of Health Services Standards for Unlimited Public Contact ~itle 22:2.2 M?N, 2.0 NTU). Water to be coagulated, filtered, twice disinfected after secondary treatment. Quantity: Minimum amount - 57 ACoFT/year - Equal to current use ~ Flow: Maximum Daily - 185,000 gallons Peak flow - 515 gpm at 55 psig. COST: $40,072/year to escalate at one half the rate of drinking water quantity charge increases. To be billed in equal bi-monthly invoices. ADDITIONAL QUANTITIES: Water in excess of 57 acre feet per year will be supplied at 90% of the prevailing cost of drinking water. '?!;2, 3:,.ii~i...._. '!: ii ;.::' :~ . ~ ':~:. ~-'-,, ~ :.~ ?:~ ;; ~:~ ~ .~ .,~ · ~ '~ ::;~: ~ ~. m. ~..~. ~. Mr. Richard Ambrose May 8, 1991 Page 2 TERM: PERMIT: NEXT STEPS: MAINTENANCE: COST DETAILS' CAPITAL: OPERATION: A 10 year purchase commitment is required. District must obtain a permit from the Regional Water Quality Control Board (RWQCB). When obtained, permit will require signing of grounds indicating use of recycled water, District must monitor operation for control of runoff and ponding and water quality must be monitored and reported by the District to the RWQCB. Gain Zone 7 support for 10 year use of recycled water at no financial cost nor penalty in access to water. Obtain easement to cross 1-580 at reasonable cost. Consider fee to support District contribution. The District shall operate and maintain all treatment and pumping equipment and piping upstream of the point of connection to the City's irrigation system. The City shall operate and maintain all facilities and equipment downstream of the point of connection to the irrigation equipment. FILTRATION EQUIPMENT With Pumps, Chemical Feed, Equipment, etc. DISTRIBUTION PIPING TOTAL CAPITAL Principal and Interest 10yrs.@8 7o TREATMENT PLANT OPERATOR 2 Hrs./Day 180 Days/Yr. @ $32.97 CHEMICALS AND ELECTRIC POWER LAVWMA ENERGY CREDIT 57 AF @ $45.00 - 40% $225,000 $160,000 $385,OOO $57,300 $11,870 $12,000 -$1,026 $22,844 Mr. Richard Ambrose May 8, 1991 Page 3 Further explanation of a few points may be helpful. COST SHARING - In order to improve the reliability of our water supply, and make the best use of imported drinking water, the District offers to fund one half the initial operating and capital cost of supplying recycled water to the Sports Grounds. The engineer's report estimates an annual capital cost of $57,300 and an operating cost of $22,844 per year for a total annual estimate of $80,144. The City's initial annual contribution would therefore be $40,072 to be escalated at one half the rate of future increases in the quantity charge for drinking water. TERM OF AGREEMENT - The District is willing to make the necessary capital investment if the City will commit to a 10 year agreement for purchase of recycled water at the annual fee noted above. Amortizing the capital cost of nearly $400,000 over a shorter period produces a unit cost of water that is hard to justify. LAVWMA ENERGY CREDIT - At present energy prices the cost for the Livermore Amador Valley Water Management Agency (LAVWMA) facilities to pump one acre-foot of water over the Dublin Grade is about $45. Since this cost can be avoided by reusing water in the valley a credit has been included in the $23,015 annual operating cost. Because the flow meters used to calculate the District's contribution to LAVWMA operating expense cannot distinguish between the District's flow and water from Pleasanton, only 40% of the energy credit has been applied to the calculation of operating cost for the Sports Grounds. This is based on the general distribution of treatment plant use. METER CHARGE - The Dublin Sports Grounds are currently served potable water through a 4" water meter. The City of Dublin pays a bi-monthly meter charge to defray costs of the District to maintain equipment. These "readiness to serve" charges will continue for the District and therefore the continued payment of the appropriate 4" meter charge, currently $641.30 bi-monthly, would be a requirement of the agreement to provide recycled water. Of course payment of this fee entitles the City to the potable water allocated to this meter size in the event rationing becomes required. Under the pooled allocation provision of the District's Water Use Reduction Plan this water would be available for use at any City facility. As we have discussed on a couple of occasions, it is very difficult for any utility district, or city to provide a new supply of water whether recycled or not, at a cost competitive with our drinking water. The potable water operations benefit from economies of statewide scale and decades old investment in infrastructure. Nonetheless, it has been our objective in this proposal to make the recycled water generally competitive with your cost of potable water, in evaluating the proposal, consider the following: · Current quantity charge for a year's supply, 57 acre-feet of potable water: $31,300. First 57 acre-feet of recycled water will cost $40,072. However trace amounts of nitrogen and phosphorus will be left in the water as nutrients recommended for turf Mr. Richard Ambrose May 8, 1991 Page 4 grass. These nutrients will reduce fertilizer demands by an average of $400 per acre per year. Net value on 171/2 acres at the Sports Grounds: $7,000. Effective cost of water $33,072/year. The District proposes to raise the cost of recycled water at one-half the increase in the quantity charge of potable water. If the Zone 7 cost of treatment and District cost of energy and chemicals increase at 3% per year in the 6th year of the agreement the recycled water becomes less expensive than potable water if fertilizer savings are considered. Additionally if the 5 acres at the Civic Center are irrigated at the same rate as the Sports Grounds with recycled water purchased at 90% of potable water cost a savings of about $895 per year would result on this additional water alone. The savings increases to $2,895 per year if fertilizer savings are considered. This would be recycled water used in addition to the 57 acre-feet per year base amount. Please note that to date the District has invested more than $10,000 to study the additional treatment needed, how it can best be provided and for field work to confirm or deny an available conduit under 1-580. The proposal is silent on recovery of the initial expenditure because, as noted above, the District believes that this project makes best use of community water resources and wishes to make it attractive to the City. Any project will be contingent upon permitting by the Regional Water Quality Control Board, gaining an easement to cross Interstate 580, and developing an equitable funding source for the District's contribution to the project. With regard to funding, the Board has discussed imposing a Water Reliability Fee on District water customers to augment water supplies for current residents. A survey will be sent to the customers this week asking their opinion of uses of recycled water, whether they support a fee for initial projects and if they support a fee, what amount they are willing to pay. This fee will affect the City with its 47 current water services and certainly every opportunity will be given for all customers to comment before any decision is made. Consideration of this fee is independent of the Dublin Sports Grounds project and the amount collected would be based on needs which are broader than can be met solely with recycling projects. We are open to discussion of the draft proposal. When it appears that agreement can be reached District staff will resume work on permits and easements to support the project so that the investment and enjoyment by our community in the playing fields and parks will not be threatened by drought. Very truly yours, RDB:gb ROBERT D. BEEBE General Manager DUBLIN SAN RAMON SERVICES DISTRICT May 29, 1991 Mr. Lee Thompson Director of Public Works City of Dublin 100 Civic Plea P.O. Box 2340 Dublin, CA 94568 Dear Lee: The table below presents information in reply to your inquiry about the fertilizer value of the tertiary treated wastewater proposed for irrigation of the Dublin Sports Grounds in the District's letter of May 8, 1991. NUTRIENT VALUE OF DSRSD RECYCLED WATER IRRIGATION RATE: 36" PER YEAR RECOMMENDED BY Americm~ Turf Grass Council. Pounds per 1,000 S.F. annually Total Total Total Available Available Available Nitrogen Phosphate Potassium as: N as: Pz_QO5 as: K2__O_O 4 < 1 0* SUPPLIED BY Recycled Water. Pounds per 1,000 S.F. annually 22 10 4.3 * Soils in the Livermore-Amador Valley contain more potassium naturally than is required by the American Turf Grass Council. Mr. Thompson May 29, 1991 Page Two I hope this information is helpful in evaluating the benefits of using recycled water. Our horticulturist recommends against additional fertilizing when using recycled water because it results in an excess requirement for mowing. Please call if we can be of further help in evaluating the May 8th proposal. Sincerely, ROBERT D. BEEBE General Manager RDB:ng