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HomeMy WebLinkAboutTask Order No. 2.8 with CH2M HILL, Inc. for Sidestream Nitrogen Removal StudyTASK ORDER N0.2.8 UNDER THE MASTER AGREEMENT FOR PROFESSIONAL SERVICES BETWEEN CITY OF MERIDIAN AND CH2M HII.L, INC. This Task order is entered into by and between City of MERIDIAN (OWNER) and CH2M HILL, Inc. (ENGIlVF.ER), according to the terms and conditions of the Master Agreement (AGREEMENT) for Professional Services, dated January 1, 2007. See Attachments A and B for the Scope and Fee for Task 2.8 All other terms and conditions of the original agreement will remain in full force and effect. IN WITNESS WHEREOF, the parties execute below: For CHZM HILL, Inc. dated this day of G ~ tr-~ _, 2008. By: ame Title For City of Meridian dated this l2~"day of By: Tammy 200Q: Jaycee 1~61man, City Clerk Approved By City Council: ~14..+~. Lo ~ oZ b O 9 `~~~,~~»u~f~~M~N~~i ,, aEA~, y $M 9 '~'Sr ts't • ~ ~ `~ P ~~ ~~~~h~Nnm t-~~t~~~~~~ P~1,~ wo~c~s ~ ~'~ P vJ P~~ j 8©~ Task Order 2.8 Attachment A Sidestream Nitrogen Removal Study Project Understanding In anticipation of possible future NPDFS effluent limits for nitrogen and potential capacity improvements, the City of Meridian (City) wants to evaluate several technologies to address its nitrogernrich recycle flow, priuncipally from the centrate flow stream. Centrate is currently equalized and then conveyed to the head of the plant. This recycled flow represents a significant contribution to the overall nitrogen levels in the final effluent. This study will consider alternative approaches to treating the centrate sidestream. Additionally, some of these technologies have the potential to increase overall system capacity by augmenting ruitrifiers back into the main process, which allows operation at lower SRTs and subsequent increases in overall plant capacity. Scope of Work CH2M HILL will perform four tasks as outlined below. Task 1 Water Quality and Infrastructure Assessment Task 1.1 Kickoff Meeting CH2M HILL will meet with the City to further define project goals, review potential treatment technologies to achieve these goals, and define data needed to analyze these technologies. CH2M HILL will travel to the City for this meeting. Task 1.2 Sidestream Water Quality Characterization and Treatabillty CH2M HILL will evaluate and document the historical characteristics of the centrate Sidestream, focusing on alkalinity, pH, TIQV (organic and inorganic), and phosphorus. Although phosphorus is not a tazgeted nutrient, up to 5 screening level samples will be collected to ensure that phosphorus limitations do not impede treatment. The samples will be analyzed by the City and written results provided to CH2M HILL. Utilizing projections for sludge flow and loads provided by the City, future Sidestream loadings will be developed for planning purposes. Task 1.3 Existing Sidestream Facility Assessment CH2M HILL will assess the serviceability of the existing plant equipment needed to support the Sidestream treatment alternatives being developed under subsequent tasks. At this stage of the study, hydraulic modeling will not be conducted. The results of the site visit, along with equipment drawings, and capacities of key process units will be compiled. I; I ,i ~! i L ' s t ~ ' ~ s ~ E ~~ z <€ 1 I 3 i ; ` ~ ~ ~ ~ '' ;- ;? 'F a i1 i ~ i ,~ i ~ ~~ ~ :~ ~ f ~' 4 j } .. ~ `~ 7~ Task 1.4 Existing Bioreactor Pertormance CH2M HILL will assess the ability of the current liquids treatment system to remove nutrients from the raw sewage. This will include developing a sampling program (to be executed by the city) that examines the nutrient profiles with the secondary treatment system (Ammonia, Nitrate, Orthophosphate, soluble COD}. This data will be used to calibrate the existing whole plant model for the new secondary treatment system configuration. This model can then be used to estimate the impacts of sidestream treatment on both nutrient removal and plant overall capacity. Task 2 Development of Alternatives Task 2.1 Alternatives for Integrated Treatment This task will define an integrated sidestream and in plant nitrogen removal process. This integrated approach would not only remove nitrogen from the sidestream, but also would potentially increase the main plant's ability to remove nitrogen. This could be achieved through bioaugmentation of nitrifying bacteria from the sidestream treatment system to the main plant. However, in order to be able to quantify the range of impacts of the integrated sidestream treatment system on the main plant's nitrogen removal capacity, a preliminary process model of the facility will need to be updated and calibrated using Pro2D. Process performance will be assessed at two temperatures, m;n~mum month winter and average summer. Under this task, CH2M HILL will identify up to three integrated sidestream and main plant removal process configurations. Task 2.2 Conceptual Capital and Operating Costs Order of magnitude capital and operating costs will be developed for up to three treatment alternatives. Key operating costs that will be captured include energy, chemicals, and labor. Unit costs for these parameters will be provided by the City. Task 2.3 Effects on Struvite Harvesting CH2M HILL will analyze the effects that sidestream nitrogen removal will have on the struvite harvester technology such as that offered by Ostara. As part of the final report, a section su~n~unarizing the change in chemistry in the struvite harvester will be provided. Task 3 Report Preparation and Final Workshop CH2M HILL will prepare a draft report on the information developed in the fast two tasks of the project. A review meeting will be conducted to discuss comments on the report. Comments will be incorporated and a final report will be issued. Task 4 Project Management Project management will consist of: • Supervising project staff, • holding consultant staff coordination meetings as required, ~ ~ ~' ~ I I ~ ~ . ~ ~, ~ n f , ~ ~ i~ ~ I ~ ~ ~? ~ 4 { a I f. ~ ~ ~, ~ ~ F .~i 1 7 ~~ ~ z ~ i ~ f 4 ~ ~ ~ ~~~. 7 ~ y t '~ ' ~E ~~ 3 ~ I ~ F xs ~ j _ ri i I ~ j ~ ~: d t t , ~ ~ ~ ~~ 1 3 F E_~ ~ 1 ~ ~ ~' 1 ~~ I' ~ i tl.. ~ C i3 ~ { ` ~ I 7 ~ ! ~ .. ~ ] t i~` ~ ~ SSSfft ~~ ~ ~ f ; t t ; ~ 1 1 I ~ ~E S , ~ ~ ~ V § ~ ~ 3 ~ ~.. ~ ,~ . ~ , ~ i { ~~~ f T i ~ ~ ~ ' { R ~ ~ ~ . y ~ ~ ~ i {1 ~~.G ; i ~ ~ ~ ~ ' ~ ~ ~~~ ~. l ~ ~~ i s, ~i l i _i 1 IS ~ ~ ~ _ ~ ~. _ z ~ ~ ~ ~ ~ ~~ ~~ ~ { i fi . ~ ij ~ i ~. ~i t , 1 ~ L: s 1 :. f.S .. ~1 .. ~ i i I~.L - ~ .~. ~ ~ . . ~ .`r . !' FE f~ a ~~ • documenting meeting decisions and action items, • assigning activities to team members, • monitoring project progress, including work completed, work remaining, budget expended, schedule, estimated cost of work remaining, and estimated cost at completion, • monitoring project activities for potential changes, anticipate changes when possible, and with Owner approval, modify project tasks, budgets, and approach, • preparing and submitting a monthly billing with backup documentation, • performing project quality control reviews of deliverables on this project. Attachment B Compensation Level of Effort The task level of effort estimates are s~~*n*na~~ed in the following table. CH2M HILL has developed this level of effort estimate based on the work plan presented herein and assumptions stated previously. The fees will be billed as time and material, and will not exceed the total amount below without prior approval by the City. Level of Effort Task Description Total Task 1 Water QualJty Infrastructure and Assessment $8,000 2 Evaluation of Alternatives $25,000 3 Report Preparation and Final Workshop $11,000 4 Project Management $4,000 Summary -All Tasks $48,000 All costs will be billed as time and materials basis not to exceed the value above. All work will be completed and costs will be billed in accordance with the Master Service Agreement dated January 1, 2007. Schedule A draft report will be submitted within 30 days of the date when sampling and analysis is completed. A final report will be submitted within 60 days of the date when sampling and analysis is completed. CH2M HILL is prepared to proceed without a signed contract if written authorization (letter or a-mail) to proceed is received. { ~ E ~~ i p i l ' ~ i ~~ r, ;t ~ 13 ~' a ~ 1~ 1 ~t ~~ ~. ~~ ~~ .~ ~, `~ ~~ ~ ~ ~ z :~~, 1~~. :,.~ l 1 1 ; ~~~i: ;: ~~ i ~~ ~ ~ ~F C k ;, i ,~ ,a _i I a ~ it i t ;~ ~ 3 I ( j f ~ i i~ tj 1 ~ { ,. 1 ~ # ~ ;; f! !. 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