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HomeMy WebLinkAbout1989 Ordinance No. 023, I amnwa oo. ~ 3 SERIES Cl' 1989- BY AlmUU'lY <XX!CIL BILL 00. 27 nmaxnD BY CXXJNCn. MD!BER IWll'NICHI' l\11 amnwa ~ l\11 AGRmD:m' AND HElGANIXJ~ OF' UNDERSTANDIN. AM:N. F?G.EW:lOO, LITl'IEl'C1I, GLENW.E, DDM::R JUX;ICJW. CXXJNCll. Cl' GCVERNMEm'S (DRaX;) AND DMSIQI C.-ACMINIS'nlAXIQI OF THE COLClWX) DEPAR'IMFffl' OF ,IEAI.'111, ~ BY TIii!! WAlm ~ITll' CXlmlOL DMSIQI TO PERF'CIU1 A Wl\STELONl l\LLOCM'IQI S'ruDY Fa! BmlENl' 14 OF THE 9'.llml PLATl'E RIVER. WHEREAS, the Bi-<:ity Wastewater Treatment Plant discharges treated wastewater to Segnl!nt 14 of the south Platte River; and WHEREAS, Segnent 14 is classified as a Class I wam water fishery and irust rreet the water quality standard for such; and lfflEREAS, a wasteload allocation study should be perfo~ to determine the assimilative capacity of Segnent 14 for amronia; and WHEREAS, the "'SSt ?load allocation study will be <bne by DRXX; as the lead agency and the U.S. Department of Interior -Geological survey (USGS) will perform the majority of the work; and WHEREAS, four agencies will participate in funding the study: DRCai, Englewood, Littleton, and Glendale; NOW, THEREFORE, BE IT ClIDAINED BY T!!F. CITY COONCIL OF 'l1IE CITY OF l:NiLElnD, COLC!WX), THAT : section l. 'l11e l\grE!ESfent and Merrorandl!Jn of Understanding attached thereto between and among Little ton, Englewood , Glendale, Denver Regional Council of Goverrvrents and Di vi s i on of Mninistration of the Colora<b Departrrent of Hea lth, represented by the Water Quality Control Division, are hereby awroved. Said l\grE!ESfent and Me11orandl!Jn of L'nderstanding provide gener a lly as follows : 1. DRCCG is to provide certain services in connection with the proposed s t udy and its aaninistration and wi ll e nter into a Joint Funding l\greenent wi th U&;S for its services for an anount allocated t o Englewood not exceeding $19 ,000. 2. Bi-<:ity Joint Venture (Littleton/Englewood) is to pay $34,720 toward the t otal project cost. 3. catpletion of the study is to be by March 31, 1990. 4. DIO); will review existing data base, outline alternatives and develop consensus on nodel inputs anong EPA, 1-Q:D, USGS, and dischargers invol ved in the study. -1 - 5. ~ will establish future facility flows and loads bued on the planning year 2010. 6. USGS will 00l1\l'l!rt existing data bue developed dlring the 1985 rodeling effort to be applied to the EPA QUAL-2E rrodel. 7. CRJ:Xl will use the results of the QUAL-2E rrodel to propose an allocation of amoon.ia loading to segment 14 among the Bi-City, Highlands Ranch, and Glendale wastewater treatment plants. 8. A final report will be pro&x:ed jointly bet,,,een DRCOO and USGS and results and reocmrendations of the study will be prasented as an 11nencmmt to the Clean water Plin to the DRCOO Board and the IQX:. 9. A steering ccmnittee will be formed to overs.:e the wasteload allocation study. 10. Agreerrent may be terminated upon 60 days' written r.otice by any of the parties. Mction 2. 'l1ie Mayor and City Clerk are hereby authorized to s ign and attest said l\greement and Merrorand!Jn of understanding for and on behalf of City Council and the City of Engk.iwd. Introduced, read in frll, and passed on first reading oo the 15th day of May, 1989. Published as a Bill for 11n ordinance on the 18th day of May, 1989. Read by title and passed on fi•.il reading on the 5th day of June, 1989. Published by title as ordinance No.:11., Series of 1989, on the 8th day of June, 1989. I, Patricia H. crow, City Clerk of the City of Englewood, Colorado _. hereby certify that the foregoing is a true copy of the ordinance passed on final reading and published by title as ordinanc~ d(,3 , Series of 1989. y~..;(J-~ Patricia H. crow -2- Project No . THIS AGREEMENT BY AND BETWEEN THE DENVER REGIONAL COUNCIL OF GOVERNMENTS AND THE CITY OF ENGLEWOOD Contract No . THIS AGREEMENT by and between the Denver Regional Council of Govern· ments ("Council") and the City of Englewood ("City"). WITNESSTH THAT: WHEREAS, the Colorado Water Quality Control Commission has extended a temporary modification of 0. 1 mg/I for unionized ammonia on Segment 14 of the South Platte River so that the Cities of Englewood and Littleton and the Council can complete, with the cooperation and review of the Colorado Water Quality Control Division ("Division"), a wasteload allocation for unionized ammonia for Segment 14 ; and WHEREAS , the Council, the cities uf Englewood, Littleton, and Glendale and the Division have entered into a Memorandum of Understanding regarding the preparation and submittal of a wasteload allocation ; arid WHEREAS, the Council has agreed to administ•r a Wasteload Allocation Study for the cities; and WHEREAS, the City has the resou r ces, with the City of Littleton, to partially support the work necessary to complete the Wasteload Allocation Study . NOW , THEREFORE, the parties hereto mutually agree as follows : 1.0 COUNCIL SERVICES 1. 1 The Council hereb-1/ agrees to provide certain services in connection with the proposed study and its administration on behalf of the City and other participants in the study. 1 . 2 The Council shall do, perform, and carry out all work described in Exhibit A, Scope of Services, of this Agreement attached hereto and made part hereof. 1 .3 In order to complete the Scope of Services , the Council shall enter into a Joint Funding Agreement with the United States Geological Survey ("USGS"). 2.0 TIME OF PERFORMANCE 2 .1 The services of the Council shall commence upon e,cecution of this Agreement and s hall be undertaken in such sequence as to assure completion of .111 services required hereunder by Morch 31, 1990. EXHIBIT G III-30 -3 .0 COMPENSATION 3 .1 The City agrees to pay 534 ,720 towards the $59,550 total project cost , payable upon execution of this Agreement . 3 .2 The Council agrees to engage and compensate the USGS for an amount not to exceed $19,000 for services rendered in the completion of the Scope of Work . Thi s amount is to be included in the Joint Funding Agreement which will total $38,000, with the USGS and the Council each contributing 519,000 . 3 .3 The remaining pro;,ct funds of 521,550 will be used for salaries and other costs necessitated by •~e Scope of Work, Exhibit A . 3 .4 It is expressly unde rstood and ag r eed that in no event will the total com · pensation and reimbursement to be paid by the City exceed the amount of ,34, 720 for all services required . 4 .0 PROJECT DIRECTOR 4 . 1 The performance of the se r vices r equi r ed of the Council hereunder will b e under the direct supervision of Lar r y G. M1 •gler ("P r oject Director"), who shall coordinate the work of the contract with the City 's Project Coordinator. The "Project Coordinator" shall be Stewart Fonda or his assigns . 5.0 STErnlNG COMMITTEE 5 . i All 1•1o rk performed u nder this co ntract shall be coord inated with the Steering Comm ittee created under the Memorandum of Agreement , Exh ib it B. 6 .0 OWNERSHIP G.1 Info rmat ion and mate r ials p ro d uc ed in \-.h o le o r in part un d er this c o nt ract shall be deemed owned by the Coun ci l , p ro, ided that the City shall h ave full use of this info rmat io n a nd mate r ia ls b y v irt ue of this Ag r eement. 7 .0 APPROVAL OF TERMINATION 7 . l This Agre ement can be termi n ated by maj o rity vote of the Steering Committee, giv ing all participants written n otice at le ast 60 day s p r ior to the effec ti ve date of such te r mination . In the event of termination, any funds remain ing after payments of all cost s to the date o f term ination , including wind ing down the project , shall be refunded to all contributors, including t he City , in propo rtion to the ir contributions. 7 .2 The Coun c il, by written notice s etting forth the effective date , at least 60 days prio r to that dat e , may tel'm inat e th is Agre em e nt. The Council s hall con - t i nue to pe r form its obl i gations up to the effect i ve date . Any funds r ema i n i ng after payments of all costs to the date of termination, including winding down the project, shall be refunded to contributors in proportion to their contributions . EXl\;BIT r. 111-31 2 8 .0 CHANGES 8 . 1 Any changea, including any increase in the amount of the Councll'1 compen - ution, which are mutually agreed upon by and between the Council, the Steering Committee, and all of the contributor, shall be incorporated in written amendments to this Agreement . IN WITNESS WHEREOF, the parties hereto have made and executed this Agreement and Contract this_ day of ______ , 1989 . ATTEST : J.W . Belmear Administrative Officer ATTEST : DENVER REGIONAL COUNCIL OF GOVERNMENTS "Council" By:_..,,....,--,-:---=--,--.,,----,-,--=-~-Robe, t 0 . Farley , Executive Director By : EXIIIBlT G 111-32 ENGLEWOOD "City " 3 EXHIBIT A SEGMENT 14 AMMONIA WASTELOAD ALLOCATION STUDY Scope of Work The Colorado Water Quality Control Commission (WQCC) has requested DRCOG to administer and undertake an ammonia wasteload allocation effort for segment 14 of the South Platte River in cooperation with Littleton, Englewood, and the Water Quality Control Div ision (WQCD). This Scope of Work outlines the steps necessary to carry out this waste load allocation . The communities involved in the wasteload allocation are Englewood, Littleton, Glendale, and Highlands Ranch A steering committee will overview the study as established in a Memorandum of Understanding (MOU) developed between the Denver Regional Council of Gov · ernments (DRCOG), the WQCD,Aand Bi ·City (Littleton/Englewood). The MOU is attached as part of the Sr.ope of Work . The recommendations from the allocation study will be presented to the WQCC as part of the 1990 DRCOG Clean Water Plan amendment process. General Description of Study The process of allocating a wasteload begins with defining of a Total Maximum Daily Load (TM0L) the receiving water ciln accommodate and not exceed in-stream standards . The primary pollutant of concern in segment 14 is unionized ammonia . Two variables must be set for different flow regimes to determine the TMDL for unionized ammonia : 1) dilution water; and 2) percentage of ammon ia in the unionized form. Because the percentage r' unionized ammonia is dependent on both temperature and pH , agreement on t he critical value established for t~ese two parameters must be reached before the TMDL can be set. Based on the previous USGS modeling done on segment 14 , both temperature and pH within the river are affected by facility discharges and tributary inflows . Although the model has been designed to predict these effects , upstream and tributary conditions will need to be def ined externally for the wasteload allocation study. The upstream flow condition will need to be evaluated for the wa stel oad allocation study in predictive modeling efforts. The WQCC recently adopted new basic s tandards that defined new cri t e ria for low flow cond ition s. Both acute and chronic low flow definitions are provided . These values are based on the available statistical record . EPA ha, a computer program which should be able to calculate both values for the three gaging stations in segment 14 . Once critical value ass umptions are set for flow , temperature and pH, then a critical value for total ammonia in the river can be calculated . At this time in the •lie cation study the TMDL can be allocated among available dlschorgers . EXHIBIT G JII-33 Ammonia Wuteload Allocation April 7, 1989 Page 2 Wnteload allocations are usually most critical where there are niultiple dischargers to a segment. In such cases, the TMDL must be split between the various entitles In a way that is determined to be fair to each discharger . Currently, the Bi-City hcility is the only facility with a major impact on ammonia in segment 14.. How· ever, two other POTW dischargers uist which could potentially add ammonia to this river segment : the Centennial plant at Highlands Ranch and the City of Glendale plan t on Cherry Creek. Neither facility is currently very large or discharging much ammonia, but both could grow and should be accounted for in the allocation. There is a new industrial discharge into segment 14 with a dis· charge of 0 . 58 MGD which will discharge ammonia. The assumptions about size , level of discharge, and ammonia contribution to segment 14 will need to be de· termined before any new modeling is initiated with the QUAL-2E model. The QUAL·2E stream model for segment 14 can then be run at different levels of ammonia discharge from the Bi-City facility t o determine allocation for the effluent limit. If other facilities have an in f' Jen e e on this result, then allocations will need to be balanced among the fac il ities. DRCOG's current general policy on allocations is to require equal treatment at each facility lo a water quality segment. If the segment 14 allocation study results in a different policy (e.g ., least total cost to all facilities), the result would need to be presented to the DRCOG Board as a Clean Water Plan amendment . If the other facilities ha · e no discernible impact on segment 14, the load allocated to Bi-City under the critical value assumptions can be forwarded to the WQCC for consideration as the wasteload allocation . In a previous study, Spahr and Blakeley (1985) used a computer model developed by the U.S . Geological Survey to simulate the effects of effluent from the Bi-City Wastewater Treatment Plant on the South Platte River. Recently , the State of C?lorado has adopted the U .S . Environmental Protection Agency 's QUAL·2E model a; the preferred method for estimation of such effects. DRCOG is interested in a comparison of the original study results with the results that would be obtained from the QUAL ·?E model. The U.S . G•ological Survey is currently using the QUAL ·2E model , and would also like to know how it compares to the previously us,.d model. The objectives of the U.S . Geological Survey portion of the study are: 1. Calibrate and verify QU/\L-2E for the South Platte River reach between the gaging stations at Littleton and 50th Avenue. 2 . Determine the differences , if any, between simulation results from QUAL·2E and the previous study (Spahr and Blakely, 1985). The data set used in the previous modeling study will be converted to the input format for QUAL-2E . The model will be calibrated using data from September 1983 , and verified using data from October 1982 and January 1984 . Model results EXHIBIT C 111-34 Ammon ia W11teload Allocation April 7, 1989 Page 3 will be plotted by distance along the study reach . Standard errors of estimation i or aach modeled property and constituent will be tabulated , QUAL-2E calibration and verification r,sul•s will be compared to USGS model re· suits reported by Spahr and Blakely ( 1985 ). Compari s ons will be plotted by river mile for selected constituents . Differences iil results will be tabulated for the critical subreach (S P -500) below the Bi-C ity Wastewater Plant . The effects of wMtewater effluent will be estimated by simulation, u sin g the calibrated QUAL·}f model and the appropriate low flow standard . Separate sim· ulations will be made ior various combinations of water temperature, effluent discharge rate , and concentrations of CBOD and nitrogen species in the effluent. Results for CBOD , nitrogen species, and DO will be plotted in comparison to results reported by Spahr and Blakely (1985), Ma•imum nitrogen species and minimum DO concentrations for selected simulations will be compared to values obtained from the USGS model in the i,revious study . -Task Descriptions TASK 1 : Review Data Base and Mo.:Jel Assumptions DRCOG will review existin g data base, outline alte r natives and develop consensus on model inputs a,,-ong EPA , l'/QCD, USGS , and dischargers in · volved in the study . lnfor,,.,otion t o be reviewed includes the follow in,;i : • Existing data base used in previous USGS modeling effort . • South Platte River pH /temperature conditions and low·flow criteria used in the Bi -City NPDES permit and other data as deemed appropriate by the steering committee . • Tributa ry flows and water quality for Bear Cree k and Cherry Creek , • Additional data associated with other discha r gers ( Highlands Ranch, Glendale). • Flow Rating curves for three gaging stations on Se Jmer,t 14 , TASK 2 : Develop Discharge Loading Condit ions DRCOG will establish future facility flow s and •~ad s, based on the planning year 2010 . Some rev isions of population growth and plans for facil ity ex · pansion , provided ia e,cisting documents , may be required for thi s particular study . TASK 3 : Convert Data , Calibrate and Verify the QUAL·2E Model for Segment 14 EXH I BIT G III-35 Ammonia Wasteload Allocation April 7, 1989 Page 4 The USGS will convert the existing data base, developed during the 1985 modeling effort, to be applied to the EPA QUAL·2E model n,e model will also be calibrated and verified using the existing data base . This task will require that the following issues be addressed : • Range of monthly low-flow criteria at facilities -Chronic 30 to 80 els -Acute 10 to 60 els • Location of critical point within Segment 14 for unionized ammonia . • Ammonia decay rates. • Unionized ammonia calculation given pH values (add external code to model). • f.ffect of other dischargers . • M,,del predictions for DO and nitrate TASK 4 : Develop Wasteload Allocation DRCOG will use the results of the QUAL-2E model t,,, Propose an allocation of ammonia loading to Segment 14 among the Bi-City , Highl an ds Ranch, and Glendale wastewater treatment plants . Develop alternative ammonia allocations . • Evaluate other nitrogen species, if required by the steering comm ittee. TASK 5: Final Report A final report will be produced jointly between DR COG and the U.S . Geological Survey which documents \he model conversion, calibration and verification, and the alternative ammonia allocations. The report will provide a recommended ammonia wasteload allocation . TASK 6 : Clean Water Plan Amendment The results and recommendations of the study will be presented as an amendment to the Clean Water Plan to the DR COG Board and the l~QCC. EXHIBIT C 111-'6 KEMOBNfPQM or VIIPIBBTNIPJHG JllTBQPQCTJQH The Cities ot Englewood and Littleton (hereinatter collectively reterred to as •the cities• or individually reterred to as •Englewood• and •Littleton,• respectively) and the Division ot Administration ot the Colorado Department ot Health, represented by the Water Quality Control Division, a subdivision thereot (hereinatter •the Division•) and the Denver Regional council ot Governments (hereinafter *DRCOG•) and the City ot Glendale (hereinatter •Glendale•) enter into this Agreement concerning the Wasteload Allocation Study to be conducted on Segment 14 ot the South Platte River. This Segment was designated and labeled as such by the Colorado Water Quality control Co111111ission and is described as the mainstream of the south Platte River from Bowles Avenue in Littleton, Colorado to the Burlington Ditch diversion in Denver, Colorado. This Agreement is authorized by and becomes ettective pursuant to the Colorado Wator Quality Control Act (hereinafter •the Act•), Section 25-8-308(1) (e). •HEREAS, the Colorado Water Quality Control Commis r,J.on (•hereir.after the •co111111ission•) has extended a temporary modification of O.l mg/1 for unionized a111111onia on Segment 14 so that the Cities and DRCOG can complete, with the Divi- sion'• cooperation and revi ew, a wasteload allocation for unionized a111111onia for segment 14; and WIIEUAS, the Cities jointly own a wastewater treatment plant (hereinafter the •Bi-City Plant•) which currently discharges secondary treatment effluent into Segment 14 purs~ant to N.P.D .E.S. Pernit No. 0032999 issued by the Division. Wlltlll!!AS, DRCOG has been designated as Regional Water Quality Planning Agency pursuant to Section 208 of the Federal Clean Water Act; and WIIEREAS, the parties agree that a Wasteload Allor.ation Study should be conducted to deternine the unionized ammonia wasteload allocation for Bi-City and other dischargers on Segment 14; and WIIEREAS, the Cities, the Division, DRCOG, and Glendale, (hereinafter •the parties*) desire to enter into a coopera- tive agreement to facilitate perfornance of a Wasteload Allocation study so that a wasteload allocation for unionized ammonia on Segment 14 can be recommended to the co111111ission. NOW, THEREFORE, IT IS AGR.EED between the parties as follows: ( ( I. STEERING CQKMITTEB 1. A steering committee will be organized with repre- sentatives from the Division , the cities, DRCOG, Glendale, and any other discharger fina ncially participating in the study. The Steering Committee will consist of one represen- tative of the city ot Englewood, one representative of the City of Littleton, one representative ot the Division, one representative of DRCOG, one representative of Glendale, and one representative of any other discharger that wishes to financially participate in the Wasteload Allocation Study. DRCOG shall serve as the facilitator for the Steering Collllllittee. 2. The pur:pose of the Steering Collllllittee shall be to oversee the Wasteload Allocation Study, described in detail at Section II of this Agreement. Further, the purpose of the Steering Co111111ittee shall be to allow the parties to critic- ally review the Wasteload Allocation Study while it is ongoing and change portic,ns of said study while it is ongoing it the parties deem it necessary. F~rther, the purpose of the Steering Co1U111ittee shall be to allow the parties to discuss and to make recollllllendations regarding the application of the results of the study to the process ot determining a reasonable wasteload allocation for dischargers to segment 14 and to propose such wasteload allocation for adoption by DRCOG in the Clean Water Plan ("CWP"J and approved by the Co111rnission. 3. The Steering Collll!littee shall meet at least monthly from th~ on set of the Wasteload Allocation Study for the purposes described above in paragraph 2. The Steering Collllllittee shall continue to so meet until the Wasteload Allocation Study has been completed and recommendations for a wasteload allocation are formulated for consideration by the DRCOG Board and the Commission. Minutes shall be taken at each meeting and approved by each of the parties hereto. 4. The Steering Committee shall consider and discuss the i mpact of all dischargers on levels of unionized ammonia in Segment 14. 5 . During the course of the Wasteload Allocation Study, Unit~d States Geologic Survey (hereinafter wusGsw) personnel shall be inv ited to the meetings to explain and answer questions regarding their data base and computer model, des- cribed below in Section II of this Agreement. The Steering Committee shall review as often as necessary the Wasteload Allocation study while it is ongoing. All questions, problems or recommended alterations shall be raised as they become apparent or foreseen. If such an event occurs, the 2 ( parti•• will aaka every effort to re ■olva th• concern in a t im ely fashion. 6. After th• USGS has aubmittad it• final modeling reaulta, the Steering Committee ■hall thoroughly evaluate and di ■cu•• such reported result ■ and ■hall formulate a proposed wastaload allocation to recommend to the DRCOG Board and tu Commission. It, however, the Steering Committee is unable to agree on the terms of a proposed wastaload allocation, each party may formulate and submit its own proposed wasteload allocation tor conaidaration by the DRCOG Board and/or the C')mmis ■ion. II. TBB JAITBLQN> ALLQCATIQH ITQPX 1, The parties agree that the Wastaload Allocation Study should culminate in an amendment to the CWP by March 1990, which may lead to a regulatory wa ■teload allocation of unionized ammonia tor Segment 14 by December 1990. 2. The parties agree that the objective of a regulatory wastaload allocation of unionized ammonia for Segment 14 i• to assist dischargers on the segment to meat and maintain compliance with the nW11eric standard of 0.06 mg/1 tor unionized a111111onia. J. The focus of the Wasteload Allocation study shall be on unionized ammonia with other total nitrogen species being evaluated as determined necessary by the Steering Committee. 4, The parties agree that the planning period covered by the wasteload allocation developed as a result of t:1e Wasteload Allocation Study shall be through the year 2010. s. The Wasteload Allocation Study shall concern only Segment 14, however, the Steering Committee shall consider the affects of sidestream and upstream discharges on unio- njzed alll!llonia concentrations in Segment 14, Non-point sources of unionized ammonia may be evaluated to the extent that the data base, described in paragraph 6, allows. 6. The parties agree that the data base shall consist only of data used in the Comprehensive Stream Study on Segment J · and data currently in existence for Segment 14 and its trib·. ~aries . The data base to be used will be unani- mously agreed upon by the Steering Committee. 7. The parties agree that the existing data described in paragraph 6 is sufficient for purposes of the Wasteload Allocation Study. 3 ( 8, The Environmental Protection Agency'• QUAL-2E Model shall be used in the Waateload Allocation Study, The QUAL-2E Model will be calibrated and verified with the same data used in calibrating the USGS Model for the Comprehensive Stream Study, Results of the QUAL-2E Model and the USGS Model will be raviewed by the Steering Committee and compared 1:o ensure reliability. 9. The parties agree that the QUAL-2E Model, properly calibrated and verified, is acceptable, appropriate and sufficient for purposes of the Waateload Allocation Study. 10. Th• waateload Allocation Study shall be administered by the DRCOG. However, the Cities may .easonably require other dischargers who wish to participatu in the wa ■teload allocation to share, pro rata, in the co•;t.s of the Wasteload Allocation Study. 11, The parties intend that the Wasteload Allocation Study should be based on the best available data and it is expected to serve aa the decision making tool for facilities design and permitting until other data or studies prove it materially in error. The coat of any Wasteload Allocation Study baaed on such future data Dhall be borne by the entity advuc..ting the materially different wasteload allocation or apportioned on such basis aa mutually agreed upon by entities affected by such Wasteload Allocation Study. A materially different wasteload allocation would be subject to the plan amendment procedures of DRCOG and the Commission. III, GENERAL CONSIDERATIONS l, Any data used or proposed to be used for purposes of conducting the Wasteload Allocation Study shall be available and accessible to any party to this agreement upon reasonable re?quest. 2. By entering into this Ag.eement, the parties do not waive or delegate any of the rights or responsibilities they have under the Federal Clean Water Act, the Colorado Water Quality Control Act, or regulations promulgated in further- ance thereof. EXECUTED this day of _____ , 1989. ATTEST: CITY OF ENGLEWOOD By: ____________ _ ATTEST : ATTEST: ATTEST: ATTEST: CITY or LITTLITOH By: ___________ _ THE COI.ORADO WATER QUALITY CONTROL DIVISION By: ____________ _ THE DENVER REGIONAL COUNCIL OF GOVERNMENTS By: ________ _ THE CITY OF GLENDALE By: ___________ _ 5 DATE May 15, 1989 INITIATm BY STAFF SOURCE COUNCIL CONNUNICATION AGEICA ITEN 11 (e) llasteload Allocation for Segment 14 of the South Platte River . 8-City IIIITP Supervisory Committee Stewart Fonda, Di rector of Ut 11 hi es PREVIOUS COUNCIL ACTION None . ACTION PROPOSm Englewood City Council consider an Ordinance approving the agreement and Memorandum of Understand h g l'o r and on behalf of the City of Englewood with the Denver Regional Council of Go vem n~nts (DRCOG) to perform a Wasteload Allocation Study for Segment 14 of the South Platte River . B.~CKGROUND The Bi-City WIil~ discharges treated wastewater to Segment 14 of the South Platte River . Segment 14 is classified as a Class I warm water fishery and has a water quality standard for unionized ammonia of 0.06 mg/I. In order to meet this water quality standard, ammonia must be removed from the wastewater at the plant. A wasteload allocation needs to be performed to specifically determine the assimila- tive capacity of Segment 14 for ammonia, how much ammonia can be discharged from the plant and how much ammonia needs to be removed . The wasteload allocation study will be performed by DRCOG as the lead agency and the U.S. Department of Interior - Geological Survey (USGS) will perform the majority of the work. All work will be performed by utilizing data existing at present, including data obtained by plant staff and data already published . Four agencies are participating in funding the study: DRCOG, Englewood, 11ttleton, and Glend,le. The study will be perfonned under the direction of a steering commit- tee consLting of one member from each of the above agencies, as well as from the Health Department, USGS, and possibly, the Environmental Protection Agency . FINANCIAL -The total cost of the study 1s $59,550. The cost allocation for each city h: Englewood: Littleton: Tctal: $17,360 $17,360 $34,720 The funds from En11lewood and Littleton w111 be taken from the respective sewer funds through the Bi-City account . No funds ware budgeted for 1989 . RECOIIIEll>ATION Council approve the ordinance approving the wasteload allocation study agreement and the memorandum of understanding between the agencies involved.