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RESOLUTION RE: ACTION OF BOARD OF COUNTY COMMISSIONERS OF WELD COUNTY, COLORADO, CONCERNING SITE APPLICATION OF TOWN OF WINDSOR AND AUTHORIZE CHAIRMAN TO SIGN WHEREAS, the Board of County Commissioners of Weld County, Colorado, pursuant to Colorado statute and the Weld County Home Rule Charter, is vested with the authority of administering the affairs of Weld County, Colorado, and WHEREAS, the Board has received a Site Application from the Town of Windsor concerning the installation of two surface aerators in an existing sewage treatment facility located on the following described parcel of land, to-wit: Part of the SEz SE* of Section 34, Township 6 North, Range 67 West of the 6th P.M. , Weld County, Colorado WHEREAS, the regulations for site applications for the installation of two surface aerators in an exsisting sewage treatment facility require review of the site application by the Board of County Commissioners, and further, that various local and State agencies be given the opportunity to review and comment on said site application, and WHEREAS, the Site Application from the Town of Windsor was submitted to the Board of County Commissioners of Weld County for review and comments, a copy of said application being attached hereto and incorporated herein by reference, and WHEREAS, after study and review, the Board finds that said site application is compatible with the Weld County Comprehensive Plan, and that it is in the best interest of Weld County to recommend approval of said application. NOW, THEREFORE, BE IT RESOLVED by the Board of County Commissioners of Weld County, Colorado, that the Site Application submitted by the Town of Windsor be, and hereby is, recommended favorably to the Colorado Department of Health's District Engineer as being compatible with the Weld County Comprehensive Plan. BE IT FURTHER RESOLVED by the Board that the Chairman be, and hereby is, authorized to sign said site application. PL0079 920645 PLCt1q cc : )'L , A P I° RE: SITE APPLICATION - TOWN OF WINDSOR PAGE 2 The above and foregoing Resolution was, on motion duly made and seconded, adopted by the following J / vote on the 15th day of July, A.D. , 1992. �/V �� BOARD OF COUNTY COMMISSIONERS ATTEST: WELD COUNTY, COLORADO Weld County Clerk to the Board Geo a Ken edy, Chairman / BY: 4,i , y427- t,_.,..2„,, DepuyClerk to the Board Constance L. Harb r , Pro-Tem APPROVED AS FORM: ��z/� C. W. K rby� County Attorney Gordon acy W. H. We ster 920645 ;OLORADO DEPARTMENT OF HEALTH dater Quality Control Division 5210 East 11th Avenue Denver, Colorado 80220 APPLICATION FOR SITE APPROVAL FOR CONSTRUCTION OR EXPANSION OF: A) DOMESTIC WASTEWATER TREATMENT WORKS (INCLUDING TREATMENT PLANTS, OUTFALL SEWERS, AND LIFT STATIONS) OVER 2,000 CPD CAPACITY. B) INTERCEPTORS (IF REQUIRED BY C.R.S. 25-8-702 (3)) APPLICANT: Town of Windsor ADDRESS: 301 Wnlrmt St_ Wirdvnr, en R0 50 PHONE: (Alb-7):76 Consulting Engineer's Name and Address: PHONE: A. Summary of information regarding new sewage treatment plant: 1. Proposed Location: (Legal Description) SG 1/4, SE 1/4, Section 31 Township fill , Range 67W Weld County. 2. Type and capacity of treatment facility proposed: Processes Used Addition of two 15 hp surface aerators to existing first stage pond. Hydraulic Organic 7),7 gal/day lbs. BOD5/day Present PE Design PE % Domestic % Industrial 3. Location of facility: . Attach a map of the area which includes the following: (a) 5-mile radius: all sewage treatment plants, lift stations, and domestic water supply intakes. (b) 1-mile radius: habitable buildings., location of potable water wells, and an approximate indication of the topography. A,�l 4. Effluent disposal: Surface discharge to watercourse Cache La Poudre River Subsurface disposal. Land Evaporation Other State water quality classification of receiving watercourse(s) 1tec,class2,ALc1ass2,AG Proposed Effluent Limitations developed in conjunction with Planning and Standards Section, WQCD: BOD5 30145 mg/1 SS 75 110 mg/1 Fecal Coliform6000/12009100 ml Total Residual Chlorine .0111 mg/1 Ammonia 10-2):.3 mg/1 Other nivrr,rease-l0 5. Will a State or Federal grant be sought to finance any portion of this project? No G. Present zoning of site area? FA, Industrial. Zoning with a 1-mile radius of site? FA, Industrial 7. What is the distance downstream from the discharge to the nearest domestic water supply intake? There are no domestic intakes between the Windsor WWTP and the confl- (Name of Supply) • uenco of the South .Platte 13 miles downstream. (Address of Supply) What is the distance downstream from the discharge to the nearest other point of diversion? 2 miles to Jones Ditch (Name of User) (Address of User) -1— WQCD-3 (Revised 8-83) 920645 8. Who has the responsibility for operating the proposed facility? Town of Windsor 9. Who owns the land upon which the facility will be constructed? Town of Windsor (Please attach copies of the document creating authority in the applicant to construct the proposed facility at this site. ) 10. Estimated project cost: $p0,000.00 Who is financially responsible for the construction and operation of the facility? Town of Windsor — 11. Names and addresses of all water and/or sanitation districts within 5 miles downstream of proposed wastewater treatment facility site. Nona (Attach a separate sheet of paper if necessary.) 12. Is the facility in a 100 year flood plain or other natural hazard area? Yes If so, what precautions are being taken? Dike levels aro above flood plain. All buildings are above flood plain. Has the flood plain been designated by the Colorado Water Conservation Board, Department of Natural Resources or other Agency? Colo. Water Conservation Board (Agency Name) If so, what is that designation? //lr6 13. Pleasrinclude all additional factors that might help the Water Quality Control Division make an informed decision on your application for site approval. The addition of two l5 horsepower aerators should increase the plant's �appniiyJ�b T1(10 hafted nn a 250 mill influent DOD. Information regarding lift stations: 1. The proposed lift station when fully developed will generate the following additional load: Peak Hydraulic (Nee) P.E. to be served 2. Is the site located in a 100 year flood plain? If yes, on a separate sheet of paper describe the protective measures to be taken. 3. Describe emergency system in case of station and/or power failure. 4. Name and address of' facility providing treatment: 5. The proposed lift ,station when fully developed will increase the loading of the treatment plant to_ % of hydraulic and Y of organic capacity and agrees to treat this wastewater? Yes No (Treatment Agency) Date • Signature and Title • 920645'. .JQCD-3 (Revised 8-83) • C. If the facility will be located on or adjacent to a site that is owned or managed by a Federal or State agency, send the agency a copy of this application. D. Recommendation of governmental authorities: Please address the following issues in your recommendation decision. Are the proposed facilities consistent with the comprehensive plan and any other plane for the area, including the 201 Facility Plan or 208 Water Quality Management Plan, as they affect water quality? If you have any further comments or questions, please call 320-8333, Extension 5272. Recommend Recommend No Date . Approval Disanoroval Comment . Sig ature of Representative 1. Management Agency 2. Local Government: Cities or Towns (If site is inside boundary or within three 3. 17/5/9. miles) and Sanitation Districts. naard of County Comm oners aU (la 4. Ni Local Health Authority 5. 4 City/.County Planning Authority 6. Council of Governments/Regional Planning 7. State Geologist (For lift stations, the signature of the State Geologist is not required. Applications for treatment plants require all signatures.) iM I certify that I am familiar with the requirements of the "Regulations for Site Applications For Domestic Wastewater Treatment Works," and have posted the site in accordance with the regulations. An engineering report, as described by the regulations, has been prepared and is enclosed. • DATE : /I f fill /k DENNIS MARKHAM Signature of Applicant TYPED NAME TOWN OF WINDSOR • —3— WQCD-3 (Revised 8-83) 920645 e ATTACHMENT TO SITE APPLICATION In accordance with C.R.S. 1981, 25-8-702 (2)(a), (b), and (c), and the "Regulations for Site Applications for Domestic Wastewater Treatment Works", the Water Quality Control Division must determine that each site location is consistent with the longrange, comprehensive planning for the area in which it is to be located, that the plant on the proposed site will be managed to minimize the potential adverse impacts on water quality, and must encourage the consolidation of wastewater treatment works whenever feasible. In making this determination, the Division requires each applicant for a site approval for a domestic wastewater treatment works to supply an engineering report describing the project and showing the applicant's capabilities to manage and operate the faility over the life of the project to determine the potential adverse impacts on water quality. The report shall be considered the culmination of the planning process and as a minimum shall address the following: Service area definition including existing population and population projections, flow/loading projections, and relationship to other water and wastewater treatment plants in the area. Proposed effluent limitations as developed in coordination with the Planning and Standards Section of the Division. (Allow minimum four weeks processing time. ) Analysis of existing facilities including performance of those facilities. Analysis of treatment alternatives considered. Flood plain and natural hazard analysis. Detailed description of selected alternatives including legal description of the site, treatment system description, design capacities, and operational staffing needs. Legal arrangements showing control of site for the project life. Institutional arrangements such as contract and/or covenant terms fur all users which will be finalized to accomplished acceptable waste treatment. Management capabilities for controlling the wastewater throughout and treatment within the capacity limitations of the proposed treatment works; i.e. , user contracts, operating agreements, pretreatment requirements. Financial system which has been developed to provide for necessary capital ant continued operation, maintenance, and replacement through the life of the project. This would include, for example, anticipated fee structure. Implementation plan and schedule including estimated construction time and estimated start-up date. !pending on the proposed project, some of the above items may not be applicable to address. i such cases, simply indicate on the application form the non applicability of those. -4- 920645 WQCD-3 (Revised 8-83) BEFORE THE WELD COUNTY, COLORADO, PLANNING COMMISSION RESOLUTION OF RECOMMENDATION TO THE BOARD OF COUNTY COMMISSIONERS ..� Moved by Richard Kimmel that the following resolution be introduced for passage by the Weld County Planning Commission. Be it resolved by the Weld County Planning Commission that the application for: NAME: Town of Windsor ADDRESS: 301 Walnut Street, Windsor, CO 80550 REQUEST: Approval of a Site Application for the addition of two aerators to an existing sewage treatment facility. LEGAL DESCRIPTION: Part of the SE4 SE4 of Section 34, . TEN, R67W of the 6th P.M. , Weld County, Colorado. LOCATION: East of Highway 257 and north of the Cache La Poudre River. be recommended favorably to the Board of County Commissioners for the following reasons: This proposal is consistent with the Weld County Zoning Ordinance. Sewage treatment facilities are covered under the definition of Utility Service Facilities and are a use allowed by right in the I- 1 (Industrial) zone district. This proposal is consistent with Public Facility and Service goals and policies and the Industrial goals and policies of the Weld County Comprehensive Plan. It is the opinion of the staff that this facility is appropriately located in relation to surrounding land uses , and that the requirements of the State Health Department will insure that necessary environmental standards are met. The Weld County Health Department and North Front Range Water Quality Planning Association have reviewed this proposal and expressed no objections. Motion seconded by Don Feldhaus. VOTE: For Passage Against Passage Richard Kimmel Tom Rulon Bill O'Hare Judy Yamaguchi Juliette Kroekel Don Feldhaus Shirley Camenisch 920045 RESOLUTION, TOWN OF WINDSOR July 7 , 1992 Page 2 The Chairman declared the resolution passed and ordered that a certified copy be forwarded with the file of this case to the Board of County Commissioners for further proceedings . CERTIFICATION OF COPY I , Sharyn Ruff, Recording Secretary for the Weld County Planning Commission, do hereby certify that the above and foregoing Resolution, is a true copy of the Resolution of the Planning Commission of Weld County, Colorado, adopted on July 7 , 1992. • Dated the 7th of July, 1992. Sharyn . Ruff Secretary 920645 SUMMARY OF THE WELD COUNTY PLANNING COMMISSION MEETING July 7, 1-992 U A regular meeting of the Weld County Planning Commission was held July 7, 1992, in the County Commissioners' Hearing Room (Room #101) , Weld County Centennial Center, 915 Tenth Street, Greeley, Colorado. The meeting was called to order by the Chairman, Bud Clemons at 1:30 p.m. Tape 416 Roll Call Richard Kimmel Present Jean Hoffman Absent Tom Rulon Present Bill O'Hare Present Judy Yamaguchi Present Juliette Kroekel Present Don Feldhaus Present Shirley Camenisch Present Bud Clemons Absent Also present: Lanell Swanson, Current Planner, Brian Grubb, Current Planner, Department of Planning Services, Lee Morrison, Assistant County Attorney, John Pickle, Director, Trevor Jiricek, Environmental Protection Specialist, Weld County Health Department, Sharyn Ruff, Secretary. The Vice-Chairman welcomed the new Commission member, Juliette Kroekel, to the Planning Commission. The minutes were approved as read with the correction noted on Case S-323 for a second after the motion. CASE NUMBER: Site Application APPLICANT: Town of Windsor REQUEST: Installation of two surface aerators in an existing pond system. LEGAL DESCRIPTION: Part of the SE4 of Section 34, T6N, R67W of the 6th P.M. , Weld County, Colorado. LOCATION: North of the Cache La Poudre River and east of Highway 257. The Town of Windsor did not have a representative at the meeting. Brian Grubb gave a brief overview of the application and read the staff recommendation. The Vice-Chairman asked if there was anyone in the audience who wished to speak for or against the application. No one wished to speak. Dick Kimmel moved the Site Application for the Town of Windsor for the installation of two surface aerators in an existing pond system be forwarded to the Board of County Commissioners with the Planning Commission's recommendation for approval. Don Feldhaus seconded the motion. 920645 SUMMARY OF THE WELD COUNTY PLANNING COMMISSION MEETING July 7, 1992 Page 2 The Vice-Chairman asked the secretary to poll the members of the Planning Commission for their decision. Richard Kimmel - yes; Tom Rulon - yes; Bill O'Hare - yes; Judy Yamaguchi - yes; Juliette Kroekel - yes; Don Feldhaus - yes; Shirley Camenisch - yes. Motion unanimously carried. CASE NUMBER: USR-971 APPLICANT: Frank's Woodworking REQUEST: A Site Specific Development Plan and a Special Review permit for an I-1 (Industrial) use (Stair Manufacturing) in the C-3 (Commercial) zone district. LEGAL DESCRIPTION: Part of the SW4 of Section 23, T1N, R68W of the 6th P.M. , Weld County, Colorado. LOCATION: North of Weld County Road 6 and east of I-25 Frontage Road. Frank Neal, applicant, said he wasn't aware of the existing zoning on the property when he purchased it. This property offers a better location and more exposure for the business. He makes spiral wooden staircases and employs 5 people. The Vice-Chairman asked if there was anyone in the audience who wished to speak for or against this application. No one wished to speak. Brian Grubb read an additional Condition of Approval (3c) into the record. The Vice-Chairman asked Mr. Neal if he agreed with the Planning Department's recommendation. Mr. Neal said he did. Don Feldhaus moved Case Number USR-971, Frank's Woodworking, be forwarded to the Board of County Commissioners with the Planning Commission's recommendation for approval. Shirley Camenisch seconded the motion. The Vice-Chairman asked the secretary to poll the members of the Planning Commission for their decision. Richard Kimmel - yes; Tom Rulon - yes; Bill O'Hare - yes; Judy Yamaguchi - yes; Juliette Kroekel - yes; Don Feldhaus - yes; Shirley Camenisch - yes. Motion unanimously carried. CASE NUMBER: USR-970 APPLICANT: William and Mary Haberkon REQUEST: A Site Specific Development Plan and a Special Review permit for the expansion of a nonconforming use (Excavating Business) in the A (Agricultural) zone district. LEGAL DESCRIPTION: Part of the SE4 of Section 22, T1N, R68W of the 6th P.M. , Weld County, Colorado. LOCATION: North of Weld County Road 6 and approximately 1/4 mile west of I-25. Bill Haberkon, applicant, explained he parks equipment and operates an excavation business. He has a building permit for the expansion of the shop and states he keeps his yard clean and respects his neighbors. Judy Yamaguchi asked how long Date: July 7, 1992 NAME: Town of Windsor ADDRESS: 301 Walnut Street, Windsor, CO 80550 REQUEST: Approval of a Site Application for the addition of two aerators to an existing sewage treatment facility. LEGAL DESCRIPTION: Part of the SE4 SE4 of Section 34, T6N, R67W of the 6th P.M. , Weld County, Colorado. LOCATION: East of Highway 257 and north of the Cache La Poudre River. THE DEPARTMENT OF PLANNING SERVICES' STAFF RECOMMENDS THAT THIS REQUEST BE APPROVED FOR THE FOLLOWING REASONS: This proposal is consistent with the Weld County Zoning Ordinance. Sewage treatment facilities are covered under the definition of Utility Service Facilities and are a use allowed by right in the I- 1 (Industrial) zone district. This proposal is consistent with Public Facility and Service goals and policies and the Industrial goals and policies of the Weld County Comprehensive Plan. It is the opinion of the staff that this facility is appropriately located in relation to surrounding land uses, and that the requirements of the State Health Department will insure that necessary environmental standards are met. The Weld County Health Department and North Front Range Water Quality Planning Association have reviewed this proposal and expressed no objections. 9206.1.5 LAND-USE APPLICATION SUMMARY SHEET Date: June 30, 1992 NAME: Town of Windsor ADDRESS: 301 Walnut Street, Windsor, CO 80550 REQUEST: Site Application for approval of the addition of two aerators to an existing pond system. LEGAL DESCRIPTION: Part SE4 SE4 of Section 34, T6N, R67W of the 6th P.M. , Weld County, Colorado. LOCATION: East of State Highway 257 and north of the Cache La Poudre River. POSSIBLE ISSUES SUMMARIZED FROM APPLICATION MATERIALS: The Colorado Department of Health, Water Quality Control Commission' s regulations require that the applicant submit the site application to all appropriate local governments, planning agencies and state agencies for review and comment prior to submission to the Colorado Department of Health' s District Engineer. The regulations further state that if the proposed facility is located in the unincorporated area of a county, the county planning agency should be requested to comment upon the relationship of the treatment works to the local long-range comprehensive plan for the area as it affects water quality including the location in the floodplain and capacity to serve the planned development. The county agency should also comment upon the relationship of the treatment works to the comprehensive plan for the area as it affects water quality for the proposed treatment works to be located within the boundaries of a city or town. 920645 • naso To of Windsor • f' 301 WALNUT • WINDSOR, COLORADO 80550 ' TELEPHONE: (303) 686-7476 • Board of County Commissioners P.C. Box 758 Greeley, CO 80632 Dear Board of County Commissioners: Enclosed is a site application submitted for your review and approval. - r It is the Town of Windsor's intention to install two 15 horse- power surface aerators to our existing pond system. This will increase the aeration capacity, therefore increasing the over- all treatment capacity of our plant from 1.0 M.G.D. to 1.3 M.G.D.. If, ,after reviewing the application, you have any questions, or comments, please contact me at 686-2144. Sincerely, )1 De is Markham Treatment Plant Operator 9206 4$ ATTACHMENT TO SITE APPLICATION FOR THE TOWN OF WINDSOR I . SERVICE AREA The Town of Windsor operates an aerated lagoon type wastewater treatment facility. The current population is 5, 100. In addition to providing wastewater treatment for all of the residential, commercial and industrial customers, the Town provides wastewater treatment for all domestic-type wastewater discharge from the Kodak Colorado plant which is not annexed into the Town Limits. Kodak treats its own industrial wastewater. The attached service area map was copied from the current Areawide Water Quality Management Plan (208 Plan) for Larimer and Weld Counties (Region 2) prepared by the North Front Range Water Quality Planning Association. The following are the population projections for the Town of Windsor as stated in the 208 Plan. YEAR POPULATION 1995 5, 600 2000 6, 200 2005 6, 800 II. EXISTING FACILITIES The lagoons are operated in series. The first lagoon is aerated with three surface mechanical aerators. The second lagoon is partitioned into two sections by a floating divider wall. One section of that lagoon, where flow from the first lagoon enters, is aerated with submerged coarse bubble diffusers. The partitioned section of the second lagoon is used as a settling zone. Effluent from the settling zone is chlorinated and flow is measured by an in-line propeller meter. The effluent then enters a 60 " diameter, 150 foot long reinforced concrete pipe leading from the chlorine building to the receiving stream. The pipe is designed to flow full, and is used as a chlorine contact chamber. At the outfall from the 60" pipe, the effluent is dechlorinated. The effluent flows a short distance through a small ditch before reaching the receiving stream. The existing facility is discharging to the Cache La Poudre River under NPDES permit no. CO-0020320. The permit became effective on January 1, 1992 . According to the permit the hydraulic design capacity of the plant is 1. 0 MGD. In the Rationale section of the NPDES permit the Department of Health Water Quality Control Division staff iteratively modelled the BOD removal, successively reducing the design flow, until a flow was found that produced a maximum calculated effluent concentration of 30 mg/1, and also satisfied the requirement that the combined removal for both lagoons be a minimum of 85%. The plant capacity was determined to be 1 . 0 MGD. At 1. 0 MGD and 215 920645 4 mg/1 BOD concentration the plant influent BOD loading is 1, 794 lbs/day. BOD removal capacity of the first lagoon is controlled by the aeration capacity of the three floating aerators. Maximum BOD removal in cell #1 is 747 lbs. per day, leaving a concentration of 125. 4 mg/1 in the flow going to cell #2 . For cell #2 , the limiting capacity is based upon detention time and corresponding predicted 77% removal rate. Therefore, BOD removal in cell #2 is 805 lbs/day. Total organic removal in the plant would be equal to 747+805 = 1, 552 lbs/day. This is equal to 86% removal and therefore meets the criteria of minimum 85%. III. PROPOSED IMPROVEMENTS Because the limiting criteria for BOD removal in cell #1 is the aeration capacity, calculations were made to determine how much additional aeration would be needed to match the BOD removal capacity based on the detention time of cell #1. In the NPDES permit rationale it was stated that at an influent BOD concentration of 215 mg/1 the overall plant capacity of the plant could be increased to 1 . 3 MGD by providing adequate aeration in cell #1. Assuming a 1. 3 MGD influent flow, the detention time in cell #1 is 3 . 7 days (4 .8MG _ 1. 3MGD) which corresponds to a predicted 54% removal rate, meaning that 1, 259 lbs.BOD/day will be removed, leaving 1, 072 lbs. BOD/day to pass into cell #2 . The required aeration capacity in cell #1 can then be calculated. Using an oxygen transfer rate of 1. 45 lbs O2/hp-hr, an oxygen uptake rate of 1. 4 lbs O2/lb BOD, the required aeration capacity is 51 hp [ (1, 259 x 1 . 4) _ (1. 45 x 24 hrs/day) ) . Existing aeration totals 30 hp, therefore the proposal is to add two (2) 15 hp aerators, for a total of 60 hp. The calculation for BOD removal for the rest of the plant should be carried out. As stated in the above paragraph, 1, 072 lbs BOD/day will pass to cell #2 . Removal capacity of cell #2 based on detention time of 7 . 5 days (9 . 8MG _ 1. 3MGD) is 72%, leaving 300 lbs BOD/day in the plant effluent. This converts to 28 mg/1 which is less than the permit limit of 30 mg/1 . The total plant removal is 87% which exceeds the required 85% . Aeration capacity of cell #2 is more than adequate to achieve the above removal; it was calculated in the rationale section of the NPDES permit as 1, 383 lbs BOD/day. IV. SCHEDULE FOR PROPOSED IMPROVEMENTS The Town of Windsor proposes to install the first aerator in 1992 and the second one in 1993 . 92`0645 i. ATTACHMENT TO SITE APPLICATION FOR THE TOWN OF WINDSOR I. SERVICE AREA The Town of Windsor operates an aerated lagoon type wastewater treatment facility. The current population is 5, 100. In addition to providing wastewater treatment for all of the residential, commercial and industrial customers, the Town provides wastewater treatment for all domestic-type wastewater discharge from the Kodak Colorado plant which is not annexed into the Town Limits. Kodak treats its own industrial wastewater. The attached service area map was copied from the current Areawide Water Quality Management Plan (208 Plan) for Larimer and Weld Counties (Region 2) prepared by the North Front Range Water Quality Planning Association. The following are the population projections for the Town of Windsor as stated in the 208 Plan. YEAR POPULATION 1995 5, 600 2000 6, 200 2005 6, 800 II. EXISTING FACILITIES The lagoons are operated in series. The first lagoon is aerated with three surface mechanical aerators. The second lagoon is partitioned into two sections by a floating divider wall . One section of that lagoon, where flow from the first lagoon enters, is aerated with submerged coarse bubble diffusers. The partitioned section of the second lagoon is used as a settling zone. Effluent from the settling zone is chlorinated and flow is measured by an in-line propeller meter. The effluent then enters a 60 " diameter, 150 foot long reinforced concrete pipe leading from the chlorine building to the receiving stream. The pipe is designed to flow full, and is used as a chlorine contact chamber. At the outfall from the 60" pipe, the effluent is dechlorinated. The effluent flows a short distance through a small ditch before reaching the receiving stream. The existing facility is discharging to the Cache La Poudre River under NPDES permit no. CO-0020320. The permit became effective on January 1, 1992 . According to the permit the hydraulic design capacity of the plant is 1. 0 MGD. In the Rationale section of the NPDES permit the Department of Health Water Quality Control Division staff iteratively modelled the BOD removal, successively reducing the design flow, until a flow was found that produced a maximum calculated effluent concentration of 30 mg/1, and also satisfied the requirement that the combined removal for both lagoons be a minimum of 85%. The plant capacity was determined to be 1. 0 MGD. At 1. 0 MGD and 215 9Z06-15 mg/1 BOD concentration the plant influent BOD loading is 1, 794 lbs/day. BOD removal capacity of the first lagoon is controlled by the aeration capacity of the three floating aerators. Maximum BOD removal in cell #1 is 747 lbs. per day, leaving a concentration of 125 . 4 mg/1 in the flow going to cell #2 . For cell #2 , the limiting capacity is based upon detention time and corresponding predicted 77% removal rate. Therefore, BOD removal in cell #2 is 805 lbs/day. Total organic removal in the plant would be equal to 747+805 = 1, 552 lbs/day. This is equal to 86% removal and therefore meets the criteria of minimum 85% . III. PROPOSED IMPROVEMENTS Because the limiting criteria for BOD removal in cell #1 is the aeration capacity, calculations were made to determine how much additional aeration would be needed to match the BOD removal capacity based on the detention time of cell #1. In the NPDES permit rationale it was stated that at an influent BOD concentration of 215 mg/1 the overall plant capacity of the plant could be increased to 1 . 3 MGD by providing adequate aeration in cell #1. Assuming a 1. 3 MGD influent flow, the detention time in cell #1 is 3 . 7 days (4 . 8MG _ 1. 3MGD) which corresponds to a predicted 54% removal rate, meaning that 1, 259 lbs.BOD/day will be removed, leaving 1, 072 lbs.BOD/day to pass into cell /2 . The required aeration capacity in cell #1 can then be calculated. Using an oxygen transfer rate of 1. 45 lbs 02/hp-hr, an oxygen uptake rate of 1. 4 lbs 02/lb BOD, the required aeration capacity is 51 hp [ (1, 259 x 1 . 4) + (1. 45 x 24 hrs/day) ] . Existing aeration totals 30 hp, therefore the proposal is to add two(2) 15 hp aerators, for a total of 60 hp. The calculation for BOD removal for the rest of the plant should be carried out. As stated in the above paragraph, 1, 072 lbs BOD/day will pass to cell #2 . Removal capacity of cell #2 based on detention time of 7. 5 days (9 . 8MG + 1. 3MGD) is 72%, leaving 300 lbs BOD/day in the plant effluent. This converts to 28 mg/1 which is less than the permit limit of 30 mg/1. The total plant removal is 87% which exceeds the required 85% . Aeration capacity of cell #2 is more than adequate to achieve the above removal; it was calculated in the rationale section of the NPDES permit as 1, 383 lbs BOD/day. IV. SCHEDULE FOR PROPOSED IMPROVEMENTS The Town of Windsor proposes to install the first aerator in 1992 and the second one in 1993 . 920645 t; (`, D 4, k\ 411/44\Sen./ _ -1 aLi 0 • c ' .`�) WELD COUNTY BUILDING PERMIT `-)n \')nI 11%)‘0(1OKKECT THE ` Of WELD COUNTY INS►ECTION DEPARTMENT \..L\.,rA.r He GREELEY.COLORADO 80631 No. .1Qa 71141.-11fig PROPERTY OWNER L.e e PHONE • MAILING ADDRESSis- e ___»yE. 3_ La]S.__.__ ._ CONTRACTOR GENERAL PHONE ` ` C -�� TT ELECTRICAL - PLUMBING I.HEATING n4 _ _11,a ADDRESS OR DIRECTION TO JOB SITE W o • ¢1549ii Sri SUBDIVISION --- - - I lot __... J Block .--- J Cs' 1ltpd t I Y'� ----- ---- --- J-a- LEGAL DfSCRIPII .E____-_ Sac_ .A. ,T_SION. R t..[W- Zoning District Distance Iron,Lot Linesel—*_'L .3041_f S._ $fa +�Er,.,o{JQ_Ir- E-------_.x.001 v _a 3/y.rte. Required Setbacks: N. __. .. S—_ _,E __--.w_ I1. TYPE AND VALUE OF BUILDING IMPORTANT -Complete All Items.Mork boxes whore applicable. A TYPE OF IMPROVEMENT C. VALUE D. PROPOSED USE -Residential New building FEES I Addition u. [•1 One Family �l�l� Remodel Value$ \\ ._ {I,�q0. IO LI Two or more Iomlly-ten Sprinkler System number of wilts ' I Repair.replacement Not included In the above price [.I Hotel,motel,or dorm) y Movable Structure ', Enter number of unit ' Move-in (relocation) e. Elecirlal QA4LI -_ EaM•oo ( I $rNEewoy • Foundation only b. Construction meter_ •••• _. [ Geroge •lbgle[ Doublet ; �}' lh.r _.._-.. -_. _ c. Permanent Me1w (� � Attached( I ached; d. Other Q\.n.,,itS1 ,7313,ay'S [.1 Carport.At hod[ ; Dot:MdH 1 B. OWNERSHIP ----- [ 1 Patio•An had( i Detached( ; I Privoie(Individual,Corp.. [.I Ream •Partial; ; Full' ; nonprofit Institution, etc) { cit5 9.ti [.1 Crawl Spout Public(Federal Stole,: + [.I Fireplace.Masonry' ; 0-Cimrencel local government) RECEIPT NO. \`at I.; Other •___ Total value Describe in detail proposed use and type d building,dimensions. of improvement$ --__ Total lees S square footage. number of stories,etc • ._-._ s≥ a.* _.. _U..cs\tr {fe ote ,,r.LkMaRp—WF, �Ql.c c,_. �eQ Sw `lIIzlAik9 ii9k „___ __,;_•)(_10 - ,uOK \( -L 15 _ '' hn.r.a.:%a bp1pt _= s- -► t, � . E. PRINCIPAL CONSTRUCTION G. TYPE OF SEWAGE DISPOSAL J. MISCELLANEOUS Wood frame ( ; Public w pct a company Number d sorts . ... . . Sructural Jima NAME Plot Mon en File.. Yes . No , Masonry (.1 vldual (*optic tank, etc.) MueprYst Yes No . Reinlorc ncr.e NUMBER — Access imaging . Now Inc net Total led era Other .— H. TYPE OF WATER SU KY - -- ---- ( I Public or •company K. ON-STREET►ARRI STAGES �r F. PRINCIPAL HEATING FUEL NAME Enclosed.. .. .. .. . Propane Ividuol(well,cistern) Out ' Go. NUM .___._—_.._______--. . _._. . 0.107/ - .__ L. RESIDENTIAL ONljr Electric' I. TYPE OF MACH l ' CCentral A ditiening Nu beMowne.. Sulzer Yes i No bp.el Other _. .___ Elevator ;Yes ;No bathrooms Full- .. NOTICE All buildups mutt conform with ihe current weld County Building Cade and Weld County Zoning 4gulotons Wdd.ng pawn's an nut nonsl.rohi• ' 9„ 06.1s ttl,AL UkSIKIPUlx14 11.. Sec. v . T ${2 N. II 4 _W Zoning Dbldct . . _ r ii Distant• from Lot Lines© Required Setbacks N ..___.. . S. _.. - _.. E W. 11. TYPE AND VALUE Of WILDING IMPORTANT --Complete All items. Mark hoses where applicable A. TYPE Of IMPROVEMENT C. VALUE D. PROPOSED USE - Residential New building FEES Addition p One Family Remodel Value S �4�l.. 1P—__S.1\_p u 9t6° I Two Of mere family .Ent Sprinkler System number of units .. . . . ' Repoir. replacement Not Included in the above prim Hotel,motel,or dorms y • • Movable Structure ..11 / Enter number d unit • • Move-in (relocation) e. Electricol .__ga9.3_.__. . _.. t.YL.QO Breemway • Foundation only - b. Construction miller_____ ___.._ _ C. Permanent I Gar S r+'4th•r Meter ._. ay. igle, Double - -- ``. _-_ Attached, : ahhrd d. Other 4\ kbrietT_. 31Re3'3 Carport. At lied Detached B. OWyi115NIP __.. / Patio All heel'. Detached /Pn, vote (individual, Corp., Bosom - Par tie' Full non-profit institution. etc) S Sty59.ti I Crawl Space Public (Federal Slate. or ( Fireplace-Masonry : 0Clooronce. local government) RECEIPT NO._ \\ at)a_. Other --___ Total volts Describe In detail proposed use and type of building,dimensions. • o1 improvement� S __a__ Total Ices S square footage.(number of stories.etc. (� ��(J(� ... \,..1 -.Na> Sas t a-n& Stt OfM M w� &atAA:i.% nesea 1- id b�... li X l l�: lu00 1 C> 1-� s`=10_Z_____- )riNca __>ante Lh E. PRINCIPAL CONSTRUCTION G. TYPE OF SEWAGE DISPOSAL 1. MISCELLANEOUS - Wood Iran* '.1 Public or prl •company Number at Hordes • . Structural sleet NAME /fat Mon an FIN.. -_— Yee' No' . Masonry 1-I vlduol (*optic tank.etc.) Blu•pint • Yoe( ' No( ; Relnforc cults NUMBER Access Foisting. ; New I i I Ulric now _� Total land area , . ' ; Other H. TYPE OF WATER SU PLY ❑ Public or le company K. Off•STREET PARRS SPACES F. PRINCIPAL HEATING FUEL NAME Enclosed„ Propane I, ) Ivldual (well,cistern) Out Gos NUMB s. Oil L. RESIDENTIAL ONE Electric I. TYPE OF MECN L C Central A nditianlrg Nu bedrooms .... .. 5 or I Yes H J No mber d Other _ ___ Elevator i J Yes I_)No bathrooms Full. _. 4.. - , NOTICE All buildings must conform with the current Weld County Wilding Code and Wild County Zoning Rpirlatione. Building permits ore nisi • tronderoble. Buildings must conform with plans, as submitted to the Deportment of building Inspection. Any clergy of plans or layout must be • • approved prior to the changes being mode. Any change in the use or occupancy d o budding or structure mast be approved prior to proceeding with construction Weld County 4 not koble for workmanship. • In the event construction is not commenced within 60 days at the leevence Of tee permit,then the some Is autem.tscolty void Cessation u1 • work for a period of 120 continuous days shall also cause this permit to be void. • • • SIGNATURE OF API T • CATION DATE T del c-� ��r -- L J9$ # \ 1 q�n • • 7/bY i aliiaw a.Astwst ?mill T rpMutn S GM3 Armco 5 5514)5 YMCA* 9 O6'45 �4-7� ' . . . 1 I i 'l' 1-of ...�, \�. tLi l 1_ (l a�!�: t I'' \i '. ��f O, „J ;^.-• ,,, fir, \ I L.. } J \ •1 '-, �� S � t ,_ J ' i�\\ _,.. i:1 1 V (� •\d • \� ryX �I ) }, I\ •�*\. 1, I _ u J��, ~j� ''~L • ` In'1 i I /�11. aO t, t`I, cu '\ - \,S•ti, II II ' ;%V`•J' — r _ Lt•- . {` 1 li V7 .'"11 j T—^ t\ I I J � `~ 1 ? i l. .I \t( I'ti' I�^f\ F/1 I r I /, , 't' I1 Y. /� ..+'. 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JO v _ ®. 4 !*t<,._ '• Required Setbacks.. N _..-- - - S____...___ —_. ._., E_._.__.—_ 11 TYPE AND VALUE Of BUILDING IMPORTANT --Complete All Items.Mork boxes where applicable. A. TYPE OF IMPROVEMENT C. VALUE D. PROPOSED USE -• Residential New building FEES Addition p � L. Om Family Remodel Value S \\%yli�._____$ Ot5! _ Two or more family—Ent Sprinkle System number of units .--- _- ._. • Repair.replacement Not included in the above price Halal,motel.or dormn y Movable Structure / Enrer number of unit Move-in (relocation) R. Ilsrtrlasl __Qp.44 _I Mat? Breesevrey • Foundotion only b. Construction malev. / Garage 'Single Double width*, __ _ . _ c. Permanent Mete FF � AHochedi ! achedd. Other "Q�v.oTl es�F..`_ '.lazz ' Carport' A I. , Der«hd : • B. OW aSNIP / Polio -An hod' - Detached • ►rivet•(Individual. Corp.. p loser, • Partial , Full Q.�9 nonprofit Institution. etc) S "'� .BJ Crawl Space Public(Federal State. or Fireplace'Masonry 0-Clearance. local government) RECEIPT NO. \\aft)a__—.—_—_ Other Total value Describe in detail proposed use and type al building.dimensions. of improvement S ____"__ Total lees S square footage, number of stories.... (etc. 9 _.1S?_X_1 O_.1u00_\0 I- \5 7 vr,o V:S tragua4a. b,,aNa - —__Saik _.— • E. PRINOPAL CONSTRUCTION G. TYPE OF SEWAGE DISPOSAL 1. MISCELLANEOUS Wood frame ; Public or pre o company Number al Hodes ---------- Structural steel NAME Plot Plan on File.. Yes' ; Ile -1 Masonry [i wicked (septic tank.etc.) Blueprint • Yes I Nei , Reinter tour NUMBER Access Existing' , New gal neer Total land area• ' G _ H. TYPE OF WATER SU PLY ill Pubic or a company K. OFF-STREET PARRI SPACES F. ,PRINCIPAL HEATING FUEL NAME Enclosed•' —""'---"'— " _'-- ! Propene Li Ividual (well,cistern) Ou Gas NUM _ _._---______—__ ....... . Oil L. RESIDENTIAL ONT. Electric • : EI. TYPE OF MECH L / C Centred A dltlanleg Nu bedrooms • err [1 rat liNo Mr of Other __ Elevator l Yes II No bathrooms Full._—.ri'—_... 'n._.__ _ • NOTICE All buildings must conform with the current Weld County Building Code and Weld County Zoning Regulations. Building permits are not transferable • Buildings nand conform with plans. as submitted to the Deportment al building tnspectbn. Any plunge al pions or layout must be opproved prior to the changes being made. • Any change in the use or occupancy of a building a structure must he approved prior to proceeding with construction Wild County is net liable for workmanship. • In the even construction is not commend within 60 days of the Issuance al this permit,then the swu is autamnpHy void Cessation el • work for o period of 120 continuous days shall also rouse this permit to be void. apSIGNATURE OF APP T .CATION DATE z,zDrI WitaNc NPNllalwl Y il 7 MMrlae IGal f AMl 4 Mid MAO. t:4•6411:;,* .1 + it/r/��• §(}f" INVENTORY OF ITEMS SUBMITTED FOR CONSIDERATION Applicant: Windsor Site Application Submitted or Prepared Prior to Hearing At Hearing 1. Application 12 pages X 2. DPS Recommendation X 3. DPS Case File Summary Sheet X I hereby certify that the 3 items identified herein were submitted to the Department of Planning Services at or prior to the scheduled Planning Commission hearing. I further certify that these items were forwarded to the Clerk to the Board's office on July 10, 1992. Current f Planner /1-- STATE OF COLORADO ) ) COUNTY OF WELD ) SUBSCRIBED AND SWORN TO BEFORE ME THIS /Q day of 1992! ijr SEAL LZA T;'.'Y u: IC My Commission Expires January 10,1995 My Commission Expires 920645 Hello