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HomeMy WebLinkAbout1.0 Application• • APPLICATION FOR SITE APPROVAL FOR CONSTRUCTION OF LIFT STATION CITY OF GLENWOOD SPRINGS, COLORADO WULFSOHN AREA LIFT STATION Prepared for Colorado Department of Public Health & Environment 222 South Sixth Street, Room 232 Grand Junction, Colorado 81501 MAY 2001 Prepared by David M. Kotz, P.E. Schmueser Gordon Meyer, Inc. 118 West 6th Street, Suite 200 Glenwood Springs CO 81601 970.945.1004 cover \99017006. SA 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 plans 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 (3031 320-8333. Extension 5272. City of Glenwood Springs — Wulfsohn Area Lift Station Recommend Recommend No Quest Aornoval Disannroval Comment Signature of Representative N/A 3. ifi WO/ 4. N/A 6. 7. x N/A N/A Mapage y nt .:ency Loca ove nt: C ties or Towns tlf site is ide oundary or t ee miles) and S Boar o o sto L C 1 Health Autho /Gounty P1ann 7' th O ove tsiRegional Planning State Geologist (For lift stations. the signature of the State Geologist is not required. Applications for treatment plan require all signatur ..I 1 certify that lam 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 6/31/a 1 F%�C�u �/ v, Cf`�.^� Larry Thompson Signature 6f Applicant -3- WQCD-3 (Revised 8-83) TYPED NAME City Engineer City of Glenwood Springs SCHMUESER GORDO• MEYER C_ENWOOD • asPEN ENGINEERSE. SURVEYORS GLENWOOD SPRINGS, CO 8 16O May 24, 2001 I 18 W. 6TH, SUITE 200 P.O. BOX 2 155 1 ASPEN, CO 8 161 2 970-945-1004 970-925-6727 FX: 970-945-5948 FX: 970-925-4157 Mr. Mark Bean, Director Planning and Building Department Garfield County 109 Eighth Street, Room 303 Glenwood Springs CO 81601 RE: City of Glenwood Springs Wulfsohn Area Lift Station Site Application Dear Mark: RECEIVED JUN 1 3 2001 This letter transmits a copy of the Site Application sent to the State for the City of Glenwood Springs Wulfsohn area lift station. This lift station will facilitate sanitary sewer service to Glenwood Springs Community Center and Municipal Operations Center. In the future, it may provide service to Glenwood Meadows or other development on Wulfsohn Ranch. Page 3 of the application form contains signature lines for the Board of County Commissioners and the County Planning Authority. After County review of the application, please returned the signed copy of Page 3 to my office so I may forward it on to the State. As always, please give me a call if you have any questions, comments or require additional information. Sincerely, SCHMUESER GORDON MEYER, INC. David M. Kotz, P.E. DMK:lec/99017c06.4 Enclosure • • • SCHMUESER GORDONMEYER ti's -• 7 11 E N G I N E E? 5 Fr, 5 U R V E Y O R S 8 W. 6TH, SUITE 200 ED, GLENWOOD SPRINGS, CO 8 1 601 970-945-1004 FX: 970-945-5948 May 24, 2001 Mr. Dwain Watson, Engineering Technician Colorado Department of Public Health & Environment 222 South Sixth Street, Room 232 Grand Junction CO 81501 RE: City of Glenwood Springs Wulfsohn Area Lift Station Site Application Dear Dwain: P.O. BOX 2155 ASPEN, CO 81612 970-925-6727 FX: 970-925-4157 Enclosed are two copies of the Site Application for the City of Glenwood Springs Wulfsohn area lift station. Components of the Site Application consist of the following: • Application form • Engineering report • "Ability to Serve" letter, Larry Thompson, 5/1 5/01 • Easement descriptions • Flow design criteria • Lift station/force main hydraulic calculations • Lift station specifications • Odor control specifications • Plan sheets GEN, 1-3 of 5; PPI, 1-4 of 4; DET1 and LS1 (under separate cover) Please call me at 945-1004 if you have any questions, comments or require additional information. Sincerely, SCHMUE GORDON MEYE , INC. David M. Kotz, P.E. DMK:Iec/99017c06.5 Enclosures • • COLORADO DEPARTMENT OF HEALTH Water Qualm Control Division 4300 Chem Creek Dnve South Denver. Colorado 80222-1530 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 GPD CAPACITY. B) INTERCEPTORS (IF REQUIRED BY C.R.S. 25-8-702 (3) ) WULFSOHN AREA LIFT STATION APPLICANT: City of Glenwood Spnngs ADDRESS: 806 Cooper Avenue, Glenwood Springs. CO 81601 Consulting Engineer's Name and Address: Schmueser Gordon Meyer Inc. 118 W. 6ih Street Glenwood Springs, CO 81601 PHONE: (970)945-1004 A. Summary of information regarding new sewage treatment plant : 1. Proposed Location: (Legal Descnption) 1/2 Township 2. Type and capacity of treatment facility proposed: Processes Used :. Section . Range County. Hydraulic Organic gal/day 1 lbs. BODsiday Present PE Design PE % Domestic_%Industnal ?. 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. 4. Effluent disposal: Surface discharge to watercourse Subsurface disposal Land Evaporanon Other State water quality classification of receiving watercourse(s) -NA- Proposed Effluent Limitations developed in conjunction with Planning and Standards Section, WQCD: BODS mg/1 SS mgil Fecal Coliform '100 nil Total Residual Chlorine mg/ 1 Ammonia mg./1 Other 5. Will a State or Federal grant be sought to finance any portion of this project? NO 6. Present zoning of site area? Zoning with a 1 -mile radius of site? What is the distance downstream from the discharge to the nearest domestic water supply intake? (Name of Supply) (Address of Supply) What is the distance downstream from the discharge to the nearest other point of diversion? (Name of User) -1- WQCD-3 (Revised 8-83) • ',Vho has the responsibility for operating the proposed facility'? 9. Who owns the land upon which the facility will be constructed? (Please attach copies of the document creating authonty in the applicant to construct the proposed facility at this site.) 10. Estimated project cost: Who is financially responsible for the construction and operation of the facility? l 1. Names and addresses of all water and/or sanitation distracts within 5 miles downstream of proposed wastewater treatment facility site. (Attach a separate sheet of paper it necessary.) 12. Is the facility to a 100 -year tlood plain or other natural hazard area? If so. what precautions are being taken? Has the flood plain been designated by the Colorado Water Conservation Board. Department of Natural Resources or other Agency? (Agency Name) If so, what is that designation? 13. Please Include all additional factors that aught help the Water Quality Control Division make an informed decision on your application for site approval. B. Information regarding lift stations: 1. The proposed lift station when fully developed will generate the following additional load: Peak Hydraulic (MGD) 0.157 P.E. to be served 2242 2. Is the site located in a 100 -year tlood plain? NO If yes, on a separate sheet of paper describe the protective measures to be taken. Descnbe emergency system in case of station and/or power failure. High Level & overheat alarms are provided. Separate diesel backup not needed until future. See attach 5/9/01 memo DMK to LT. 4. Name and address of facility providing treatment: City of Glenwood Springs Wastewater Treatment Plant 401 West 7`" St.. Glenwood Springs. CO 81601 The proposed lift station when fully developed will increase the loading of the treatment plant to 59°0 76% • of hydraulic and 59% /76% of organic capacity and City of Glenwood Springs (Treatment Agency) agrees to treat this wastewater? Yes X No * 55°F/50°F q3i/G1 0. Date Signature and Title City Engineer City of Glenwood Springs 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. NOT APPLICABLE ttttt -2- WQCD-3 (Revised 8-83) • • City of Glenwood Springs Wulfsohn Area Lift Station Engineering Report Service area definition including existing population and population projections, flow/loading projections, and relationship to other water and wastewater treatment plants in the area. The service area for the Wulfsohn Area Lift Station consists of the portion of Midland Avenue from the Glenwood Springs Community Center (GSCC) to the Municipal Operations Center (MOC). Both of these facilities are within the city limits and are currently under construction. The area between the GSCC and MOC is currently known as either Wulfsohn Ranch (or Glenwood Meadows) and may be annexed in the future. The total service area projected population equivalent is 2242 people. At total build out, loading will be 109 gpm at average daily flow (ADF), and 272 gpm at maximum daily flow (MDF). This flow condition is defined as Alternate 2 in the attached 5/9/01 memo from DMK to LT. The actual plant loading will be lower in the first few years, consisting only of the GSCC and MOC areas. ADF will be 23.4 gpm and MDF will be 58.5 gpm. This condition is defined as Alternate 1 in that memo. Proposed effluent /imitations as developed in coordination with the Planning and Standards Section of the Division. • • • The proposed effluent limitations are already established at the City of Glenwood Springs Wastewater Treatment Plant (GSWWTP). These will not be affected by the installation of this lift station. Analysis of existing facilities, including performance of those facilities. The current GSWWTP has a capacity of 2.3 mgd at 55 F and 1 .8 mgd at 50 F. At buildout of the service area, the Wulfsohn Area Lift Station will add 0.16 mgd or about 7%/9% of the plant's total capacity. The highest observed daily flows at the plant have been about 1.2 mgd or 52%/67% of capacity. Addition of the buildout lift station flows would bring the plant to 59%/76% of capacity. The GSWWTP continues to have generally satisfactory performance. It has, however, in the past, and is currently in violation of the quarterly WET test. At this time, the treatment facility is conducting the PTI/TIE investigation to determine the cause of the WET test failure. The treatment facility is not operating under a Notice of Violation or Cease and Desist Order from the Division, Flood Plain and natural hazard analysis The lift station is located well above (35' + /-) the Colorado River 100 -year Floodplain. Areas above (1000' +) the site are identified as having high to moderate debris flow risks. The station will lie in the lower portion of a low potential area. However, the lift station site is in 3.1 area identified as having no risk of debris flow after mitigation according to 1989 Chen -Northern geotechnical • • • mapping. This would be the situation after Wulfsohn Ranch develops. A small, horseshoe -shaped deflection berm (3'+/- height) will be constructed around the station for debris flow and drainage protection. Detailed description of selected alternatives including legal description of the site, treatment system description, design capacities, and operational staffing needs. The legal description for the lift station site and force main is enclosed as an attachment. The proposed lift station will consist of a 6' diameter wet well with a pre -fabricated aboveground duplex pump station. The two suction lift sewage pumps will be equipped with 7.5 hp motors, capable of pumping both the immediate future Alternate 1 flows and the ultimate Alternate 2 flows. The sewage will be delivered via a 4" force main that ties into an existing sewer manhole located at 8th Street and Midland Avenue. The gravity sewer line to the GSWWTP has sufficient capacity to handle Alternate 1 flows. There will also be an additional 8" force main that parallels the 4" main. The larger main will be used if Wulfsohn Ranch develops to the point where capacity of the 4" main is exceeded. The 4" and 8" line will be valved together such that each line may be isolated. (See enclosed drawings). The 8" force main may be extended to the plant in the future. Operational staffing and maintenance for the lift station will be part of the responsibility of the City Water/Wastewater Department. The City currently owns and satisfactorily operates several similar lift stations. • • • Legal arrangements showing control of site for the project life. Enclosed are copies of two easement descriptions that give the City the right to use the land for the lift station and force mains. The remainder of the route to the plant falls within existing city rights-of-way, easements or property. Institutional arrangements such as contract and/or covenant terms for all users, which will be finalized to accomplished acceptable waste treatment. The lift station and force mains will provide sewer service to all users in the service area and billing will occur in the same manner as the rest of Glenwood Springs. 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. The City Water/Wastewater Department will operate the lift station and plant. The plant is capable of satisfactorily treating all anticipated flows. Financial system that has been developed to provide for necessary capital and continued operation, maintenance, and replacement through the lift of the project. This would include, for example, anticipated fee structure. Financial responsibility will be with the City of Glenwood Springs. • Implementation plan and schedule including estimated construction time and estimated start-up date. The construction of the new force main is scheduled for the summer of 2001. The lift station and force main need to be operational in September of 2001 to provide service to the GSCC and MOC. • • • • May 15, 2001 Mr. Dwain Watson, District Engineer Colorado Department of Public Health & Environment 222 South Sixth Street, Room 232 Grand Junction CO 81501 RE: City of Glenwood Springs Ability to Provide Wastewater Treatment Wulfsohn Area Lift Station Dear Dwain: The City of Glenwood Springs is proposing to construct the Wulfsohn area lift station to provide sanitary sewer service to the Glenwood Springs Community Center, Municipal Operations Center, Roaring Fork Transportation Authority facility and other adjacent future development. The previously named facilities are currently under construction. This letter fulfills the requirements of Section 22.6(2)(f) of the Colorado Department of Public Health and Environment Water Quality Control Division "Regulations for the Site Application Process" by stating the following: (i) The City of Glenwood Springs agrees to treat all wastewater originating from this lift station for perpetuity or until some future State -approved alternative means of treatment is in place; (ii) the existing Glenwood Springs wastewater treatment facility currently has enough excess capacity to accept additional flows from this lift station. The plant's current hydraulic and organic capacity is rated at 2.3 MGD at 55°F and 1.8 MGD at 50°F. Peak day flows have been observed to be on the order of 1.2 MGD. Ultimate average daily flows from the Wulfsohn lift station service area are estimated at 109 gpm or 0.16 MGD. Adding the Wulfsohn area inflows to the current peak day inflows of 1.2 MGD produces a future inflow rate of 1.36 MGD or 59% of plant capacity at 55°F and 76% of plant capacity at 50°F; (iii) the City of Glenwood Springs wastewater treatment facility is not presently in violation of any effluent parameters of its Discharge Permit nor operating under a Notice of Violation or Cease and Desist Order from the Division. Please let me know if you require any additional information. Sincerely, CITY OF GLENWOOD SPRINGS , C(1/ C. C4-6, - �\ Larry Thompson, City Engineer 806 COOPER AVENUE GLENWOOD SPRINGS, COLORADO 81601 970/945-2575 FAX: 945-2597 Cc IIII 11111 111111 1111 1111111 111 111 11111 IIL 1111 • 558801 02/01/2000 12:11P 81171 P191 M ALSDORF 1 of 3 R 15.00 D 0.00 GARFIELD COUNTY CO EASEMENT THIS EASEMENT. granted this (1.- day of January, 2000, between GLENWOOD MEADOWS, LLC, a Colorado limited liability company whose legal address is 525 East Cooper. Aspen, County of Pitkin, State of Colorado 81611. the Grantor, and the CITY OF GLENWOOD SPRINGS, COLORADO, a Colorado home -rule municipality whose legal address is 806 Cooper Avenue, Glenwood Springs, County of Garfield. State of Colorado 81601. the Grantee. WITNESSETH, that the Grantor, for and in consideration of the sum of Ten and No/100 U.S. Dollars (510.00) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, does grant. bargain, sell, and convey, without warranty soever, to the Grantee a non- exclusive easement for the following purposes: (i) below ground utility installation, repair, replacement and maintenance of Grantee -owned services; specifically including the right to install line extensions of the Grantee's sewer and water systems as may be reasonably necessary to service the needs of the real property owned by both Grantor and Grantee and described hereinbelow; (ii) below ground utility installation, repair. replacement and maintenance of standard utilities reasonably necessary to service the needs of the real property owned by both Grantor and Grantee and described hereinbelow: specifically including the right to install natural gas, telephone. CATV, electric, fiberoptic and similar distribution, transmission and service lines: (iii) above ground debris flow mitigation and surface water drainage systems; and (iv) other reasonable utility purposes as may be agreed in writing by the parties hereto, over and across the following described parcel of real property, owned as of the date hereof by Grantor, situate in the County of Garfield and State of Colorado to wit: SEE EXHIBIT A, ATTACHED HERETO AND BY THIS REFERENCE. INCORPORATED HEREIN. Provided, however. that the easement granted hereby may be relocated to other, contiguous real property owned by the Grantor upon the prior written agreement of the parties hereto. Upon such relocation, each party agrees to execute such instruments as shall be necessary to effect the release of the property described upon Exhibit A hereto from the tenure and encumbrance of the within easement. This Easement is for the benefit of and appurtenant to that land. or any part thereof, situate in the County of Garfield and State of Colorado, and commonly known as the Wuifsohn Parcel as described by that certain Special warranty Deed conveying the same to Grantor dated September 6, 1996 and recorded in the Garfield County land records in Book at Page . Grantee hereby covenants that it shall maintain the lands affected by Grantee's exercise of the easement rights granted hereunder. including any and all costs of mitigation, remediation, revegetation and landscaping. Grantee agrees to repair and maintain the easement granted herein at the cost and expense of the Grantee, and that said Grantee will in no way hinder or prevent the proper and reasonable use and enjoyment of Grantor's real property through which the easement is granted or contiguous thereto, including Grantor's unencumbered rights to ingress and egress. This Easement is intended to be perpetual. In the exercise of the easement rights herein granted, Grantee may, at its own expense and with reasonable prior notice to Grantor, relocate existing Fences and other removable above -ground fixtures which interfere with the efficient use of the easement. • • 1111111 Rill 111 1111111111111 • 558801 02/01/2000 12:11P B11 P192 M ALSDORF 2 of 3 R 15.00 D 0.00 GARFIELD COUNTY CO GRANTOR: GLENWOOD MEADOWS, LLC, a Colorado limited liability company ,1 By: Name: Rober Dacgregor Title: Presideoti f Dunrene Management, Inc., the Manager of Glenwood Meadows, LLC ( STATE OF COLORADO ) ) ss. COUNTY OF GARFIELD ) The foregoing instrument was acknowledged before me this iday of January, 2000, by Robert Duncan Macgregor, as the President of Dunrene Management, Inc., the Manager of Glenwood Meadows, LLC, a Colorado limited liability company. Witness my hand and official seal. My commission expires: yr" r>-- - ^ i,(1\+ ! ^IJ lig' ^_, j:.00 lr 1 .vt Notar• Pu. is /Zvuu IIIIllIIllI1 giiip 1111111 ii,� i,nn 1111io 3 of 3 R 15.00 0 0.00 GARFIELD COUNTY CO • • EXHIBIT A • A strip of land not to exceed thirty (30) feet in width, generally situate southerly of and contiguous to the Midland Avenue Alternate Route Right of Way as surveyed and in place. Said strip of land shall commence at the western boundary of that parcel of real property conveyed by rantor to Grantee under that certain Correction Special Warranty Deed dated January Xi, 2000, commonly known and referred to as the City of Glenwood Springs Community Center Site. Said strip of land shall then extend west to the eastern boundary of that parcel of real property conveyV by Grantor to Grantee under that certain Special Warranty Deed dated January 2000, commonly known and referred to as the City of Glenwood Springs Municipal Operations Center Site. Intervening alterations, enlargements or deviations of the aforementioned Midland Avenue Alternate Route Right of Way which may exist between the point of beginning and the terminus of the strip of land described herein shall not have the corresponding effect of extending the easement granted herein further to the south of the general alignment of said Midland Avenue Alternate Route Right of Way. - • • • 1 • 1111111 11111 111111 111111111111111111111111 111111111111 587688 08/15/2000 10:01A 61201 P977 It ALSDORF 1 of 1 R 5.00 0 0.00 GARFIELD COUNTY CO PUBLIC UTILITY EASEMENT KNOW ALL MEN BY THESE PRESENTS. that the undersigned. GLENWOOD MEADOWS, LLC (hereinafter called the "Grantor'.). of the County of Garfield. State of Colorado, for good and valuable consideration. the receipt and sufficiency of which is hereby acknowledged. does hereby Brant, bargain. and convey to the CITY OF GLENWOOD SPRINGS, COLORADO. a Municipal Corporation, whose address is 806 Cooper Avenue. Glenwood Springs, Colorado, 81601 (hereinafter called the "Grantee"). and its successors and assigns a non-exclusive public utility easement upon the lands of Grantor. situated in the County of Garfield. State of Colorado, said easement being more particularly described as follows: A utility easement situated in Section 9. Township 6 South, Ranee 89 West of the 6th Principal Meridian. County of Garfield. State of Colorado. being 30 feet in width and lying 15 feet on each side of the following described centerline: Beginning at a point whence the center west 1/16 comer of said Section 9 bears S 37032'19" E., a distance of 1415.44 feet; thence S 51°26'25" E. a distance of 292.00 feet: thence S 52°58'53" E. a distance of 94.67 feet; thence 68.94 feet along the arc of a 419.58 feet radius curve to the right, having a central angle of 9°24'52" and subtending a chord bearing S 48°16'27" E. a distance of 68.86 feet; thence S 43°34'01" E, a distance of 500.94 feet: thence S 41°19'02" E. a distance of 250.17 feet to the point of ending: whence said center west 1/16 corner bears S 00°39'40" W. a distance of 286.68 feet. Together with a temporary construction easement being 50 feet in width and lying 25 feet on each side of the above described easement centerline, said temporary easement will expire 1 Jan. 2002. To construct. install. reconstruct. replace. repair, and maintain public utilities within the above described lands. Together with the right to remove any and all fences and other structures. trees. bushes. vegetation within said easement when such is reasonably necessary for the exercise of the rights herein granted. After the exercise by Grantee of any of its rights hereunder. Grantee shall promptly restore the surface of the ground to its former condition as nearly as is practicable. at the sole expense of Grantee. Neither the extent nor use of the easement granted herein shall be expanded or enlarged from its initial use without a specific written grant from Grantor for such expansion or enlargement. Grantor agrees that all facilities installed by the Grantee within the easement shall remain the property of the Grantee and shall be removable at the option of the Grantee. In the event that the extent and use of this easement is abandoned or no longer used for the purpose described herein at any time hereafter for a period of one (11 year or more. the grant herein shall revert to the Grantor. its heirs. successors and assigns. Except for the rights and privileges granted to the Grantee by this Agreement. the Grantor reserves the full. complete and unintemipted right to use, possess and occupy all portions of the property encumbered by the easement granted herein. so long as such use. possession and occupancy does not unreasonably interfere with the purposes for which the easement is hereby granted. TO HAVE AND TO HOLD. said permanent easement, unto Grantee. its successors and assigns. forever. WITNESS the due execution hereof on ,2000. 244.5.r .afn,£ AIAA•elt,eVanir PTA/fNhC,. Grantor: GLENWOOD MEADOWS, LLC STATE OF COLORADO COUNTY Of GARFIELD )ss. The foregoing Easement Deed was acknowledged before me this (6 day of 4tK / 2000. by as of GLENWOOD MEADOWS. LLC. Witness my hand and official seal. My commission expires: S /Z -OZ Notary Puc Address: 5116 • 6 SCHMUESER GORDON MEYER • • ENGINEERS 6. SURVEYORS DATE: May 9, 2001 TO: City of Glenwood Springs GLENWOOD SPRINGS ASPEN 1 18 W. 6TH, SUITE 200 P.O. BOX 2155 GLENWOOD SPRINGS, CO 8 1 601 ASPEN, CO 81 612 970-945-1004 970-925-6727 FX: 970-945-5948 FX: 970-925-4157 MEMORANDUM Larry Thompson, P.E., City Engineer FROM: David M. Kotz, P.E. RE: Wulfsohn Area Lift Station Design Criteria This memo summarize pertinent design criteria and calculations for the Wulfsohn area lift station. The following paragraphs provide supplemental information to the several pages of calculations that follow: LIFT STATION CAPACITY Anticipated wastewater contributions are summarized in the attached table entitled Wastewater Contributions. This table represents my interpretation of information contained in Debbie Duley's 3/6/01 and 3/7/01 memos to you, along with information previously considered in SGM's Wulfsohn Area Water & Wastewater Study (Project 2000-107). I considered two design scenarios: Alternate 1 consists of design flows from the MOC and Community Center only. Alternate 2 consists of Alternate 1 with the addition of Glenwood Meadows. Per your discussions with Glenwood Meadows representatives, their demands have been increased by a factor of 25% over those listed in Debbie's memo. Design flows for Alternates 1 and 2 were 58.5 gpm and 272 gpm, respectively. Lift station design pumping capacities need to be set to provide a minimum 2 fps scour velocity in the force mains. 78 gpm is required in a 4" diameter main, while 314 gpm is required in the 8" main. Based on these flow rates, it is possible to provide a station which will serve present-day Alternate 1 and the future Alternate 2 conditions, simply by changing pump speeds. The Gorman -Rupp representative estimated that the upsizing costs for the Alternate 2 condition were approximately $2000. There are also minor costs associated with a larger wetwell. • • • 6May 9, 2001 Larry Thompson Page 2 • • NEED FOR DIESEL BACKUP In evaluating the need for a separate diesel pump, I considered available storage in the manholes, and sewerlines to an elevation of one foot below the low point manhole rim elevation. The attached calculations show there is about 208 minutes of storage time for the Alternate 1 average daily flow, while there is only 45 minutes of storage available at the Alternate 2 condition. Three and one-half hours detention time for Alternate 1 should allow City personnel to correct any of the problems triggering the high water alarm. For Alternate 2, the 45 minutes is inadequate and a separate diesel pump would be required. Costs should be borne by Glenwood Meadows. 99017c02/lec DMK • • • CITY OF GLENWOOD SPRINGS WULFSOHN AREA LIFT STATION WASTEWATER CONTRIBUTIONS SOURCE ASSUMPTIONS GPD MUNICIPAL OPERATIONS CENTER (MOC) 33 persons @ 15 gpd 495 Pressure washer @ 5 gpm for 2 hrs. 600 RFTA 37 buses @ 40 gal/bus 1 ,480 38 drivers @ 10 gpd 380 24 on site @ 15 gpd 360 EMPLOYEE HOUSING 30 houses x 3.5 person/house x 70 gpd 7,350 TOTAL 10,665 Peak Flow = 2.5 x 10,665 gpd x 1 day/1440 min. = 18.5 GPM GLENWOOD MEADOWS 300 houses x 3.5 persons/house x 70 gpd 73,500 400,000 SF commercial x 2.5 EQR/1000 SF x 245 gpd/EQR 24,500 TOTAL 98,000 Peak Flow = 2.5 x 98,000 gpd x 1 day/1440 min x 1.25 safety factor 213 GPM COMMUNITY CENTER (Peak Flow = Simultaneous of following) POOL 1000 persons/event x 3 events x 5 gpd 15,000 ICE RINK 125 persons/event x 4 events x 15 gpd 7,500 GYMNASIUM 200 persons/event x 4 events x 15 gpd 12,000 COMMUNITY ROOMS 350 persons x 10 gpd 3,500 AFTER SCHOOL/ DAY CARE 10 children x 15 gpd + 50 children x 5 gpd 400 THEATER 1000 persons/event x 2 events x 5 gpd 10,000 FITNESS CENTER 25 persons/cycle x 6 cycles x 15 gpd 2,250 EMPLOYEES 7 persons x 15 gpd 105 TOTAL 50,755 Peak flow = 50,755 gpd x 1 day/1440 min = 35.2 gpm USE 40 GPM Pool drain rate = 300,000 ga1/30 hrs = 10,000 gph = 167 gpm to be accommodated by using both pumps (i.e., no redundancy). SGM tabies,9901 7CO2 David M Kotz, P E. lec: 5.8-01 • FORCE MAIN FLOWS FOR 2 fps SCOUR VELOCITY • • Diameter Flow Rate 4" 78 gpm 6" 176 gpm 8" 314 gpm LIFT STATION DESIGN FLOWS ALTERNATE 1 - WITHOUT GLENWOOD MEADOWS MOC Area 18.5 gpm Commercial Center 40.0 qpm TOTAL 58.5 gpm Set pumping rate @ 78 gpm (min. for 2 fps scour velocity in 4" main) ALTERNATE 2 - WITH GLENWOOD MEADOWS MOC Area 18.5 gpm Commercial Center 40.0 gpm Glenwood Meadows 213.0 qpm TOTAL 272.0 gpm Set min. pumping rate @ 314 gpm (min. for 2 fps scour velocity in 8" main) SGM tabies\9901 7CO2 David M Kotz, P.E. iec 5-8-01 WULFSOHN AREA LIFT STATION EVALUATE NEED FOR BACKUP DIESEL PUMP Consider line and manhole storage to 1 .0 feet below rim of low point manhole (lift station wetwell) at ADF. Wetwell rim 40.75 -1 .0 = 39.75 MANHOLE INVERT MH STORAGE (LF) = 39.75 - INVERT - 0.67' 8" PVC STORAGE (LF) G9 37.40 1.68 203 G8 35.71 3.37 198 6' Wetwell 34.37 (high alarm) 4.71 (6' I.D.) 196 G7 36.23 2.85 152 G6 37.01 2.07 136 G5 38.55 0.53 198 F 4' cb = 10.50 L.F. 50 Z 6' 0 = 4.71 L.F. Z = 1133 L.F. VOLUMES 4' 0 = n(4)2/4 x 7.48 gal/cf = 94 gal/If 6' 0 = n(6)2/4 x 7.48 gal/cf = 211.5 gal/If 8" PVC = ,7(.657)2/4 x 7.48 gal/cf = 2.54 gal/If AVAILABLE STORAGE 10.5(94) + 4.71(211.5) + 1133(2.54) = 4861 gal. Therefore: Conclude no backup needed for Alternate #1, 3.5 hours storage and can control flow from City facilities. Backup needed for future Alternate #2, 45 minutes not adequate to fix problem, limited control. SGM tables 99017CO2 David M. Kotz. P.E. leo: 5-8-01 ADF (gpm) DETENTION TIME (min) Alternate #1 (MOC & CC) 58.5/2.5 = 23.4 gpm 4861/23.4 = 208 min. Alternate #2 (w/Glenwood Meadows) 272/2.5 = 109 gpm 4861/109 = 45 min. Therefore: Conclude no backup needed for Alternate #1, 3.5 hours storage and can control flow from City facilities. Backup needed for future Alternate #2, 45 minutes not adequate to fix problem, limited control. SGM tables 99017CO2 David M. Kotz. P.E. leo: 5-8-01 • • 6 SCHMUESER GORDON MEYER ENGINEERS. 6. SURVEYORS • DATE: May 24, 2001 GLENWOOD SPRINGS I 18 W. 6TH, SUITE 200 GLENWOOD SPRINGS, CO 81601 970-945-1004 FX: 970-945-5948 MEMORANDUM TO: Larry Thompson, P.E., City Engineer City of Glenwood Springs FROM: David M. Kotz, P.E. RE: Wulfsohn Area Lift Station Calculations ASPEN P.O. BOX 2155 ASPEN, CO 81612 970-925-6727 FX: 970-925-4157 This memo summarizes the results of hydraulic calculations for the Wulfsohn area lift station. Copies of the computer output for the various calculations are attached. The lift station will make use of a six-foot diameter wetwell. Alternate 1 (GSCC-MOC only) will consist of a peak inflow of 58.5 gpm and pumping at a rate of 78 gpm to produce the two fps scour velocity in the 4" force main. The pump on/off differential under these conditions will be 1 .38 feet. Alternate 2 considers the addition of Glenwood Meadows flows. The peak flow will be 272 gpm and the pumping rate will be 314 gpm to produce the two fps velocity in the 8" force main. Under these conditions, the pump on/off differential will be 4.46 feet. Because of the complexity of the force main and possible future variations, I used the CYBERNET computer model calculate total dynamic head under each operating condition. In all, four scenarios were considered: • Scenario 1 - Alternate 1 flows in 4" force main to gravity MH at 8th & Midland. • Scenario 2 - Alternate 2 flows in 8" force main to gravity MH at 8th & Midland. • Scenario 3 - Alternate 1 flows in 4" force main to plant. • Scenario 4 - Alternate 2 flows in 8" force main to plant. CYBERNET junction reports, pipe reports and hydraulic profile output are included for each scenario. Results of the total dynamic head calculations are as follows: SCENARIO FLOW RATE TOTAL DYNAMIC HEAD 1 78 gpm 47 feet 2 314 gpm 36 feet 3 78 gpm 47 feet 4 314 gpm 36 feet • • • • • May 24, 2001 Memo to Larry Thompson, P.E. Page 2 The duplex pump station we considered with 7.5 HP pumps will be able to handle the anticipated range of flows and head conditions. The calculation results for Scenarios 3 and 4 show that, if the force mains are extended to the plant, sections of the line will want to operate under negative pressure. The reality is that the combination air and vacuum valves placed at the high points, will allow air into the system and a portion of the line will operate via gravity flow. Consequently, the operating condition for Scenario 1 is the same as Scenario 3 and that of Scenario 2 is the same as Scenario 4. I spoke with representatives of Crispin and Apco about the specific operation of the valves during all of these scenarios. After each pump cycle, sections of the force main that are downstream of the high point and above the outfall elevation at 8th & Midland will want to drain. Air will be introduced into the force main. When the pump starts, the valves will expel the air and the force main will operate properly. Both representatives stated they did not feel that the frequent operation or valve spitting or leaking would be a problem, provided the valve seats were specified for low pressure applications. Under Scenarios 3 and 4, a combination valve placed near 8th and Midland will allow air to be introduced into the system, and the section of line between the hydraulic grade line and high point will flow under gravity. This can be seen on the attached profiles of Scenarios 3 and 4. 99017c06.3/Iec Attachments DMK • • • • • 0) 01 W N CO W a a J z W 0 N N m ¢ 0 a LA -1. a 0 LU 0 Zo aQ W W O < 0 z 0 F 0 ro 0 00 N ALTERNATE #1 N v 0 v 0 0 n LTERNATE HEADLOSS x VELOCITY 0 0 0 N oti a 0 z z 0 0 Total Dynamic Head SUCTION AND DISCHARGE PIPING 0 39 18904807 0 0 0 0 0 0 0 0 0N 0 0 0 0 0 0 8 0 0 .-- 8 0 0 0 0 w Ci 'n C4 U w z F--, w 0 0 0 0 , 0 0 — 0 0 0 0 0 — 000 1 00 I 0 0,0 0 — 0 0 0 0 — 0 0 0 — c7 - n :% A H aw w .. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0.02 - 0 0 0 0 0 M 0 N 0 N 0 - - v0 - 0 0 N 0 M 0 '0 - N w W BEND 45 TEE STRAIGHT TEE BRANCH TEE LINE TO BRANCH ENTRANCE SHARP ENTRANCE BELL W Q 0 BUTTERFLY VALVE CHECK VALVE PLUG VALVE EXIT a s& & a a a v <r c v v v v v v a 1- 3 s D. C7 80 s t- 1 78.00 78.00 78 00 1 8S r- 78.00 o I 7800 7800 0 I TOTAL • J-1 • • • • Scenario: ALTERNATE 1 - 4" MOC/CC only to 8th Steady State Analysis Junction Report Node Elevation (ft) Demand (gpm) P (psi) P Head (ft) HGL (Calc) (ft) Zone Available Fire Flow (gpm) J-1 5,727.63 78.00 20.33 47.00 5,774.63 Zone -1 N/A J-2 5,750.42 0.00 7.60 17.57 5,767.99 Zone -1 N/A J-3 5,755.40 0.00 4.40 10.16 5,765.56 Zone -1 N/A J-4 5,752.00 0.00 5.58 12.90 5,764.90 Zone -1 N/A J-5 5,748.00 0.00 5.19 12.00 5,760.00 Zone -1 N/A J-6 5,753.50 0.00 0.06 0.14 5,753.64 Zone -1 N/A J-7 5,730.00 0.00 3.03 7.00 5,737.00 Zone -1 N/A J-8 5,725.00 0.00 5.19 12.00 5,737.00 Zone -1 N/A J-9 5,754.00 0.00 0.56 1.30 5,755.30 Zone -1 N/A Title: Wulfsohn Lift Station Project Engineer DAVID M. KOTZ 01999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 12:07:05 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • Scenario: ALTERNATE 1 - 4" MOC/CC •y to 8th Steady State Analysis Pipe Report Link Length (ft) D (in) Rough Minor Loss Q (gpm) Velocity (ft/s) HL (ft) Sf (ft/1000ft) O/C Status P-1 1,282.00 4 130.0 8.00 78.00 1.99 6.64 5.18 Open P-2 494.00 4 130.0 1.00 78.00 1.99 2.43 4.92 Open P-3 117.00 4 130.0 1.60 78.00 1.99 0.66 5.64 Open P-4 1,007.00 4 130.0 1.20 78.00 1.99 4.90 4.87 Open P-6 29.00 4 130.0 0.00 78.00 1.99 0.14 4.80 Open P-7 391.00 4 130.0 1.00 0.00 0.00 0.00 0.00 Closed P-8 873.00 4 130.0 2.20 0.00 0.00 0.00 0.00 Open P-9 217.00 4 130.0 1.80 0.00 0.00 0.00 0.00 Open P-10 942.00 4 130.0 3.00 78.00 1.99 4.70 4.99 Open P-11 335.00 4 130.0 0.90 78.00 1.99 1.66 4.96 Open Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 12:09:08 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • 5760.0 5755.0 5750.0 • • Profile from J-1 to T-2 Scenario: ALTERNATE 1 - 4" MOC/CC only to 8th 1 a 5745.0---r-- r- T 7 i i -- -I _ I 40 O$ _- 1 1 1 1 I I > , 1 W 5740.0- i --r r- i---1- 1r---r- -1 i 1 1 I i--- 1- +----1 t 5735.0 t 1 1 1 1 1 5730.0 - 1 1 • 5725.0* 00 1000.0 2000.0 3000.0 4000.0 Distance along Pipe Walk (ft) 5000.0 6000.0 Project Engineer: DAVID M. KOTZ Title: Wulfsohn Lift Station Cybernet v3.1 (071d] is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Page 1 1 1 05/14/01 12:24:46 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 • • 5775.0 5770.0 • • Profile from J-1 to T-2 Scenario: ALTERNATE 1 - 4" MOC/CC only to 8th a) 2 5765.0 1 I I 0 I l 0 I I I I jg57600 I I 5755.0 r -r r r 1 > rt 465 5750.0 - - - -t H - t - - —I - - -I - - I- - t-- - - t - ml 5745.0 - 'L - -{ -I -I I- I- - - 4 - - -I 5740.0 1 1 1 1 0 0 1000.0 2000.0 3000.0 4000.0 5000.0 6000.0 Distance along Pipe Walk (ft) Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 12:22:57 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 ScenarioILTERNATE 2 - 8" with Glenwoodadows to 8th Steady State Analysis Junction Report Node Elevation (ft) Demand (gpm) P (psi) P Head (ft) HGL (Calc) (ft) Zone Available Fire Flow (gPm) J-1 5,727.63 314.00 15.53 35.92 5,763.55 Zone -1 N/A J-2 5,750.42 0.00 4.27 9.86 5,760.28 Zone -1 N/A J-3 5,755.40 0.00 1.62 3.76 5,759.16 Zone -1 N/A J-4 5,752.00 0.00 2.94 6.81 5,758.81 Zone -1 N/A J-5 5,748.00 0.00 3.70 8.56 5,756.56 Zone -1 N/A J-6 5,753.50 0.00 0.03 0.06 5,753.56 Zone -1 N/A J-7 5,730.00 0.00 3.03 7.00 5,737.00 Zone -1 N/A J-8 5,725.00 0.00 5.19 12.00 5,737.00 Zone -1 N/A J-9 5,754.00 0.00 0.15 0.34 5,754.34 Zone -1 N/A Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 12:07:46 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • Scenario: ALTERNATE 2 - 8" with Glenwooddeadows to 8th Steady State Analysis Pipe Report Link Length (ft) D (in) Rough Minor Loss Q (gpm) Velocity (ft/s) HL (ft) Sf (ft/1000ft) O/C Status P-1 1,282.00 1 CO CO 03 CO CO CO CO CO CO 03 1 130.0 8.00 314.00 2.00 3.26 2.55 Open P-2 494.00 130.0 1.00 314.00 2.00 1.13 2.28 Open P-3 117.00 130.0 1.60 314.00 2.00 0.35 3.01 Open P-4 1,007.00 130.0 1.20 314.00 2.00 2.25 2.23 Open P-6 29.00 130.0 0.00 314.00 2.00 0.06 2.16 Open P-7 391.00 130.0 1.00 0.00 0.00 0.00 0.00 Closed P-8 873.00 130.0 2.20 0.00 0.00 0.00 0.00 Open P-9 217.00 130.0 1.80 0.00 0.00 0.00 0.00 Open P-10 942.00 130.0 3.00 314.00 2.00 2.22 2.35 Open P-11 335.00 130.0 0.90 314.00 2.00 0.78 2.32 Open Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 12:08:46 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • • • • • •` Profile from J-1 to T-2 Scenario: ALTERNATE 2 - 8" with Glenwood Meadows to 8th 5760.0r 5755.0 5750.0 c 5745.0 N W 5740.0 5735.0 1/6L T Tl T 5730.0 -- - - - 5725.0 0.0 1000.0 2000.0 3000.0 4000.0 Distance along Pipe Walk (ft) 5000.0 6000.0 Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ i:\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d) 05/14/01 12:24:28 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • 5770.0 5765.0 • • Profile from J-1 to T-2 Scenario: ALTERNATE 2 - 8" with Glenwood Meadows to 8th 1) -a m 5760.0 1 1 1 U I I I 5755.0 T i r T r T >,E I 1 I I I • vI 5750.0 r t -r 1 1 r -r N I I 2 5745.0- - t- -t H - - + - - H I- - - t- - + - -I ca U 1 1 5740.0- - 4- --+ + -a - -I- - -I I i I I I I 5735.0 I 1 I 0.0 1000.0 2000.0 3000.0 4000.0 5000.0 6000.0 Distance along Pipe Walk (ft) • Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 12:24:01 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • Scenario: nario: Scenario 3 - 4" Force Main• Plant Steady State Analysis Junction Report Node Elevation (ft) Demand (gpm) P (psi) P Head (ft) HGL (Calc) (ft) Zone Available Fire Flow (gpm) J-1 5,727.63 78.00 16.33 37.77 5,765.40 Zone -1 N/A J-2 5,750.42 0.00 3.61 8.34 5,758.76 Zone -1 N/A J-3 5,755.40 0.00 0.40 0.93 5,756.33 Zone -1 N/A J-4 5,752.00 0.00 1.59 3.67 5,755.67 Zone -1 N/A J-5 5,748.00 0.00 1.20 2.77 5,750.77 Zone -1 N/A J-6 5,753.50 0.00 -3.93 -9.09 5,744.41 Zone -1 N/A J-7 5,730.00 0.00 5.39 12.47 5,742.47 Zone -1 N/A J-8 5,725.00 0.00 5.69 13.15 5,738.15 Zone -1 N/A J-9 5,754.00 0.00 -3.43 -7.93 5,746.07 Zone -1 N/A Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 08:28:10 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • • Scenario: Scenario 3 - 4" Force Main to Plant Steady State Analysis Pipe Report Link Length (ft) D (in) Rough Minor Loss Q (gpm) Velocity (ft/s) HL (ft) Sf (fU1000ft) O/C Status P-1 1,282.00 4 130.0 8.00 78.00 1.99 6.64 5.18 Open P-2 494.00 4 130.0 1.00 78.00 1.99 2.43 4.92 Open P-3 117.00 4 130.0 1.60 78.00 1.99 0.66 5.64 Open P-4 1,007.00 4 130.0 1.20 78.00 1.99 4.90 4.87 Open P-6 29.00 4 130.0 0.00 0.00 0.00 0.00 0.00 Closed P-7 391.00 4 130.0 1.00 78.00 1.99 1.94 4.95 Open P-8 873.00 4 130.0 2.20 78.00 1.99 4.32 4.95 Open P-9 217.00 4 130.0 1.80 78.00 1.99 1.15 5.31 Open P-10 942.00 4 130.0 3.00 78.00 1.99 4.70 4.99 Open P-11 335.00 4 130.0 0.90 78.00 1.99 1.66 4.96 Open Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ I \1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 08:24:07 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 5760.0 5755.0 5750.0 c 5745.0 m a> I 5740.0 5735.0 5730.0 • Profile from J-1 to T-2 Scenario: Scenario 3 - 4" Force Main to Plant r I I T---1 --�--- r- - — t - I � I I 5725.0 00 - -* - - - - I- - - I - r -r L 1000.0 2000.0 3000.0 4000.0 Distance along Pipe Walk (ft) 5000.0 6000.0 Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d) 05/14/01 08:40:00 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 5770.0 5765.0 . • Profile from J-1 to T-2 Scenario: Scenario 3 - 4" Force Main to Plant ID Es 5760.0' g 5755.0 T • -0 5750.0 r r u? c>s c) 5745.0 - H U • I I 1 5740.0-- • 740.0- • 5735.0 0.0 1 i T -1 I - - rt - — — — 1 - - - - - I— — — — - -- - I I I I I I I I I I I - ▪ — —1 — — -- I— — — • — 4 — — —I 1000.0 2000.0 3000.0 4000.0 Distance along Pipe Walk (ft) 5000.0 6000.0 Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 09:00:21 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 1 • Scenario: Scenario 4 - 8" Force Main to Plant Steady State Analysis Junction Report Node Elevation (ft) Demand (gpm) P (psi) P Head (ft) HGL (Calc) (ft) Zone Available Fire Flow (gpm) J-1 5,727.63 314.00 9.89 22.86 5,750.49 Zone -1 N/A J-2 5,750.42 0.00 -1.38 -3.19 5,747.23 Zone -1 N/A J-3 5,755.40 0.00 -4.02 -9.30 5,746.10 Zone -1 N/A J-4 5,752.00 0.00 -2.70 -6.25 5,745.75 Zone -1 N/A J-5 5,748.00 0.00 -1.95 -4.50 5,743.50 Zone -1 N/A J-6 5,753.50 0.00 -5.62 -13.00 5,740.50 Zone -1 N/A J-7 5,730.00 0.00 4.15 9.60 5,739.60 Zone -1 N/A J-8 5,725.00 0.00 5.44 12.58 5,737.58 Zone -1 N/A J-9 5,754.00 0.00 -5.50 -12.72 5,741.28 Zone -1 N/A Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 08:51:46 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • • Scenario: Scenario 4 - 8" Force Main to Plant Steady State Analysis Pipe Report Link Length (ft) D (in) Rough Minor Loss Q (gpm) Velocity (ft/s) HL (ft) Sf (ft/1000ft) O/C Status P-1 1,282.00 8 130.0 8.00 314.00 2.00 3.26 2.55 Open P-2 494.00 8 130.0 1.00 314.00 2.00 1.13 2.28 Open P-3 117.00 8 130.0 1.60 314.00 2.00 0.35 3.01 Open P-4 1,007.00 8 130.0 1.20 314.00 2.00 2.25 2.23 Open P-6 29.00 8 130.0 0.00 0.00 0.00 0.00 0.00 Closed P-7 391.00 8 130.0 1.00 314.00 2.00 0.91 2.32 Open P-8 873.00 8 130.0 2.20 314.00 2.00 2.02 2.31 Open P-9 217.00 8 130.0 1.80 314.00 2.00 0.58 2.67 Open P-10 942.00 8 130.0 3.00 314.00 2.00 2.22 2.35 Open P-11 335.00 8 130.0 0.90 314.00 2.00 0.78 2.32 Open Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d) 05/14/01 08:52:17 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • • • 5760.0 5755.0 5750.0 r c 5745.0 N - a v W 5740.0 5735.0 • • Profile from J-1 to T-2 Scenario: Scenario 4 - 8" Force Main to Plant I I I I I I I I I I 5730.01- 5725.0 0.0 1 I I 1 1 1 1- -t r- -r -1I` rt 1 ! 1 1 -t H + H - - -1 - - -t -4 - ! - - —I 1000.0 2000.0 3000.0 4000.0 Distance along Pipe Walk (ft) 5000.0 6000.0 Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 08:39:43 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 • 5760.0 5755.0 N -o c(2 5750.0 • • Profile from J-1 to T-2 Scenario: Scenario 4 - 8" Force Main to Plant 1 I 1 I m 5745.0- z:T T l r T 3> I • _� -0 5740.0 1 rt �) ! I I 5735.0- - - t -+ r- + -i t- t N U • 5730.0 - - - * - - -i + -I I- 4 I 1 5725.0 1 1 1 1 I 0.0 1000.0 2000.0 3000.0 4000.0 5000.0 6000.0 Distance along Pipe Walk (ft) Title: Wulfsohn Lift Station Project Engineer: DAVID M. KOTZ is\1999\99017\moc utilities\wulf-lift-mod.wcd SCHMUESER GORDON MEYER Cybernet v3.1 [071d] 05/14/01 09:01:17 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 i • SCHMUESER GORDON MEYER ENGINEERS & SURVEYORS GLENWOOD SPRINGS ASPEN I 18 W. 6TH, SUITE 200 P.O. BOX 2155 GLENWOOD SPRINGS, CO 81 601 ASPEN, CO 81612 970-945-1004 970-925-6727 FX: 970-945-5948 FX: 970-925-4157 MEMORANDUM DATE: May 31, 2001 TO: Dwain Watson, CDP FROM: David M. Kotz, P.E. RE: City of Glenwood Springs Wulfsohn Area Lift Station Buoyancy, Pump Curves and Electric Downtime As a follow-up to our recent phone conversation, I am providing additional information on lift station buoyancy and the pumps we anticipate using. Considering a worst case scenario of groundwater to two feet below the manhole rim and an empty manhole with no lid, the buoyant force would be 36,363 lbs. and the weight of the manhole would be 31,629 lbs.. The buoyant force exceeds the weight of the manhole by 4734 lbs., which could possibly lead to flotation. As a means of preventing flotation from ever occurring, I propose adding three cubic yards of concrete placed circumferentially about the manhole base as shown on Sheet DET2. This will add a net (150 lb/cf - 62.4 x Ib/cf) manhole weight of approximately 7096 lbs. You should note that the weight of the manhole lid alone, without consideration for the weight of the pump station, would be sufficient to keep the manhole from floating. Regarding the pumps we intend using, I have attached specification data and pump curves for Gorman -Rupp Model T3A3-B. Operating points for Alternate 1 and Alternate 2 flow conditions are marked. You can see it should be possible to operate these pumps over the anticipated range of flows by simply adjusting pump speed. Both points are sufficiently below the 7 Y2 HP line. The actual pumps to be installed will be chosen based on competitive bids the City receives. Performance will be similar to the enclosed information. Larry Thompson checked with the City Electric Department regarding possible outages at the lift station. The city can feed power to the station from two different directions. They estimate that the maximum duration of an outage would be about 90 minutes, which is significantly shorter than the time provided for reserve storage (see 5-9-01 memo in "Flow Design Criteria" tab of Site Application). Please let me know if you have any questions or require additional information. 99017C06.6/lec Attachments DMK • 0 Lrl • • Specification Data • Sec. 55 PAGE 1000 MAY 1999 Self Priming Centrifugal Pump afgBasic Pump o0_. Model T3A3-B PUMPS Size 3" x 3" PUMP SPECIFICATIONS Size: 3" x 3" NPT (76 mm x 76 mm) - Female. Casing: Gray Iron No. 30. Maximum Operating Pressure 87 psi (6,1 kg/cm2).* - Open Type, Two Vane Impeller. Ductile Iron No. 65-45-12. Handles 2 1/2" (63,5 mm) Diameter Spherical Solids. Impeller Shaft: Alloy Steel No. 4140. Replaceable Wear Plate: Steel No. 1020. Removable Cover Plate: Gray Iron No. 30; 30 lbs. (14 kg). Bearing Housing: Gray Iron No. 30. Seal Plate: Gray Iron No. 30. Flap Valve: Neoprene with Steel Reinforcing. Shaft Sleeve: Alloy Steel No.4130. Radial/Thrust Bearing: Open Single Ball. Bearing Lubrication: Oil. Flanges: 125# Gray Iron No. 30. Gaskets: Bund -N, Compressed Synthetic Fibers, Vegetable Fiber, PTFE, and Cork/Rubber. 0 -Rings: Buna-N. Internal Wetted Hardware: Standard Plated Steel. External Hardware: Standard Plated Steel. Pressure Relief Valve: Brass. 011 Level Sight Gauge. Optional Equipment: Stainless Steel No. 316 Pressure Relief Valve. Automatic Air Release Valve. G -R Hard Iron Impeller, Seal Plate, and Wear Plate. 120V/240V Casing Heater. High Pump Temperature Shutdown Kit. Gray Iron No. 30 Suction and Discharge Spool Flanges; 3" ASA (Specify Model T3A3-B /F) 76 mm DIN 2527 (Specify Model T3A3-B /FM). DISCHARGE FLANGE FLAP VALVE SUCTION FLANGE VOLUTE CASING COVER PLATE SEAL PLATE BALL BEARING WEAR PLATE IMPELLER NOTE: Shown with Optional Suction & Discharge Spool Flanges (Available in ASA or DIN Standard Sizes). SEAL SPECIFICATIONS Cartridge Type, Mechanical, Oil -Lubricated, Double Floating, Self -Aligning. Tungsten Titanium Carbide Rotating and Stationary Faces. Stainless Steel No. 316 Stationary Seat. Fluorocarbon Elastomers (DuPont Viton® or Equivalent). Stainless Steel No.18-8 Cage and Spring. Maximum Temperature of Liquid Pumped, 160°F (71 °C) * *Consult Factory for Applications Exceeding Maximum Pressure and/or Temperature Indicated. SEAL DETAIL IMPELLER SHAFT SEAL ASSEMBLY Gil THE GORMAN-RUPP COMPANY • MANSFIELD, OHIO GORMAN-RUPP OF CANADA LIMITED • ST. THOMAS, ONTARIO, CANADA PUMPS Specifications Subied to Change Without Notice Printed in U.S..& © Copyright by the Gorman -Rupp Company 1999 Specification Data SECTION 55, PAGE 1000 APPROXIMATE DIMENSIONS and WEIGHTS NET WEIGHT: 404 LBS. (183 KG.)* SHIPPING WEIGHT: 452 LBS. (205 KG.)* EXPORT CRATE: 14.1 CU. FT. (0,4 CU. M.) *ADD 15 LBS. (6,8 KG.) W/EACH SPOOL FLANGE STANDARD 3"NPTSUCTION FLANGE* y 7.50/[190.51 DIA. OD. KITH .75/(19.01 DIA. r-- 4 HOLES EQUALLY SPACED ON A 6.00/(152.41 DIA. B.C. 1 22 25 0565.7] OPTIONAL ASA OR 01N 2527 3.00 SUCTION/OISCHAR( (76,2] SPOOL FLANGES 2.75 (69.8] 1 17.00 (431.81 L 7.31 [(85.77 11.56 C293.71 ).r II 2706 U (687.4] 25.81 (655.63 .75 C19.0) 1 tl `-d STANDARD rNPT DISCHARGE FLANGE. 7.50/1190.57 DIA. 0D. WITH .75/(19.01 DIA. 4 HOLES EQUALLY SPACED ON A 6.001(152.41 01A. H.C. -y, 3.00 C 76.27 9.00 18A0 REWIRED FOR REMOVAL (45721 OF BACK COVER PLATE .38 X 9 x(02(9.51(� 87 76.71.0. USEABLE KEYWAY 4.00 C `A (101.6] -. ._& 1.50 MIL11 C38.1] .69 (17.57 0u. 4 HOBS •.12 ILl9'•OOy 28.75 ( 730.21 NOTE: OPTIONAL ASA OR DIN STANDARD SUCTION & DISCHARGE SPOOL FLANGES AVAILABLE (284.27 26.31 (668x1 7.50 (190.51 1 TOTAL HEAD M PSI FT 44 60 140 40 56 130 52 120 36 rITsrrr7nmmITKKLJKau 71FJI 7 ttv r .2[4.1(r]E'r'E'DC7Ci7E�5rJC7C+488[.1a•i6! Fur. WWI ..phos o-tr to 'Awing me.. tea 00 *AT *.r a. wake*. Suellen Lift. 2.50•/[63.5 MN) DIA. MAX. SPHERICAL SOLIDS PERFORMANCE CURVE VOLUTE 11405B CURVE IMPELLER 11406 MODEL T3A-B SIZE 3'X3' IMP DIA 8.75' SP CR 1.0 RPM NOTED T3A-B-4 • *4 444*. SIN I....,M� _..�»,'- •_• - M1....•...»_. ..... ........••••••. 32 48 110 44 100 28 40 90 24 36 80 32 70 20 28 60 24 16 50 20 12 40 16 8 12 30 8 20 4 4 10 •--- ��1.I MOO • ::M NPSH eN •.. OU;: .•: ....!! U.S.GALLONS :II 0 u7 0 Le: 0 *n 0 *n 0 In 0 0 *n 0 to 0 u1 0 N In N O c.. u, '--. O N ul f- O N tor- o N l[1 r- o PER MINUTE N N N N fn r1 , 1 in V v Q .Cr LII GNI LITRES 0 N 'Cr CD CO 0 N v *0 CO O N v 10 m O N fes._► PER SECOND N N N N N M "n Ki1Q CUBIC METRES o 0 0 0 0 0 0 0 0 0 0 0 T -3-99--R PER HOUR N N1 c in *D f- m 01 O ,- FT M 3 2 1 0 8 6 4 2 0 T ' THE GORMAN-RUPP COMPANY • MANSFIELD, OHIO GORMAN-RUPP OF CANADA UMITED • ST. THOMAS, ONTARIO, CANADA PUMPS Specifications Subject to Charge Without Notice Printed in U.S.A © Copyright by the Gorman -Rupp Company 1999 • • FACTORY -BUILT 6X6 ABOVE GROUND PUMP STATION WITH DUPLEX SELF -PRIMING PUMPS 1. PART - GENERAL 1.1. Work under this section includes, but is not limited to furnishing and installing a factory built duplex pump station as indicated on the project drawings, herein specified, as necessary for proper and complete performance. 1.2. REFERENCES Publications listed below form part of this specification to extent referenced in the text by basic designation only. Consult latest edition of publication unless otherwise noted. A. 1. American National Std Assoc. (AWWA) ANSI B16.1 2. ANSI/AWWA C115/A21.15 3. ANSI 253.1 4. ANSI B40.1 5. AWWA C508 B. American Society for 1. ASTM A48 2. ASTM A126 3. ASTM A307 4. ASTM A36 C. 1. 2. Institute of IEEE Std 100 IEEE Std 112 3. IEEE Std 242 . Institute (ANSI) / American Water Works Cast iron pipe flanges and flanged fittings. Cast/ductile iron pipe with threaded flanges. Safety Color Code for Marking Physical Hazards. Gages, Pressure and Vacuum. Single Swing Check Valves. Testing and Materials (ASTM) Gray Iron Castings. Valves, Flanges, and Pipe Fittings. Carbon Steel Bolts and Studs. Structural Steel. Electrical D. National Electric Code Assoc. (NEMA) 1. NEC 2. NEMA Std MGI and Electronics Engineers (IEEE) Standard Dictionary of Electrical Terms. Test Procedure for Polyphase Induction Motors. Protection of Industrial and Control Power Systems. (NEC) / National Electrical Manufacturers E. Miscellaneous References 1. Ten -State Standards 2. Hydraulic Institute 1.3. SYSTEM DESCRIPTION National Electrical Code. Motors and Generators. Recommended Standards for Sewage Works. Std for Centrifugal, Rotary and Reciprocating Pumps. A. DESIGN REQUIREMENTS Factory built pump station design, including materials of construction, pump features, valves and piping, and motor controls 6x6 Above Ground Specifications Revised: 10-1-97 1 PS -00485 CSI Format • • shall be in accordance with requirements listed under PART 2 - PRODUCTS of this section. 1. Contractor shall furnish and install one factory built above ground, automatic pump station. The station shall be complete with all equipment specified herein, factory assembled in a fiberglass reinforced polyester resin enclosure. 2. In addition to shall include pumps, V -belt control panel, wiring. the station enclosure, principle items of equipment two horizontal, self priming, centrifugal sewage drives, motors, internal piping, valves, motor automatic liquid level control system, and internal B. PERFORMANCE CRITERIA 1. Pumps must be designed to handle raw, unscreened, domestic sanitary sewage. Pumps shall have (p " suction connection, and b " discharge connection. Each pump shall be selected to perform under following operating conditions: Capacity (GPM) Total Dynamic Head(FT) Total Dynamic Suction Lift(FT) Maximum Repriming Lift(FT) Maximum Static Suction Lift(FT) Total Discharge Static Head(FT) C. UTILITY POWER REQUIREMENTS • Site power furnished to pump station shall be 3 phase, 64) hertz, 20g volts, y wire, maintained within industry standards. Voltage tolerance shall be plus or minus 10 percent. Phase -to - phase unbalance shall not exceed 1% average voltage as set forth in NEMA Standard MG -1. Control voltage shall not exceed 132 volts. SUBMITTALS Product Data Prior to fabrication, pump station manufacturer shall submit 3 copies of submittal data for review and approval. 2. Submittal shall include shop drawings, electrical ladder logic drawings, and support data as follows: Catalog cut sheets reflecting characteristics for major items of equipment, materials of construction, major dimensions, motor and v -belt drive data, pump characteristic curves showing the design duty point capacity (GPM), head (FT), net positive suction head required (NPSHr), and hydraulic brake horsepower (BHP). Electrical components used in the motor branch and liquid level control shall be fully described. B. Shop Drawings 6x6 Above Ground Specifications Revised: 10-1-97 2 PS -00485 CSI Format • 1 Shop drawings shall provide layout of mechanical equipment and anchor bolt locations for station. Pipe penetrations and station access clearances shall be dimensioned relative to the station centerline. The electrical ladder logic drawings shall illustrate motor branch and liquid level control circuits to extent necessary to validate function and integration of circuits to form a complete working system. C. Operations and Maintenance Manuals 1 Operation shall be in accordance with written instructions provided by the pump station manufacturer. Comprehensive instructions supplied at time of shipment shall enable personnel to properly operate and maintain all equipment supplied. Content and instructions shall assume operating personnel are familiar with pumps, motors, piping and valves, but lack experience on exact equipment supplied. 2 Documentation shall be specific to the pump station supplied and collated in functional sections. Each section shall combine to form a complete system manual covering all aspects of equipment supplied by the station manufacturer. Support data for any equipment supplied by others, even if mounted or included in overall station design, shall be provided by those supplying the equipment. Instructions shall include the following as a minimum: a. Functional description of each major component, complete with operating instructions. b. Instructions for operating pumps and pump controls in all modes of operation. c. Calibration and adjustment of equipment for initial start-up, replacement of level control components, or as required for routine maintenance. d. Support data for commercially available components not produced by the station manufacturer, but supplied in accordance with the specifications, shall be supported by literature from the prime manufacturer and incorporated as appendices. e. Electrical schematic diagram of the pump station circuits shall be in accordance with NFPA 70. Schematics shall illustrate, to the extent of authorized repair, pump motor branch, control and alarm system circuits including interconnections. Wire numbers and legend symbols shall be shown. Schematic diagrams for individual components, not normally repairable by the station operator, need not be included. Details for such parts shall not be substituted for an overall system schematic. Partial schematics, block diagrams, and simplified schematics shall not be provided in lieu of an overall system diagram. f. Mechanical layout drawing of the pump station and components, prepared in accordance with good commercial practice, shall provide installation dimensions and location of all pumps, motors, valves and piping. 6x6 Above Ground Specifications Revised: 10-1-97 3 PS -00485 CSI Format • • 3. Operation and maintenance instructions which rely on vendor cut - sheets and literature which include general configurations, or require operating personnel to selectively read portions of the • manual shall not be acceptable. Operation and maintenance instructions must be specific to equipment supplied in accordance with these specifications. 1 5. QUALITY ASSURANCE A. Manufacturers Qualifications 1. Upon request from the engineer, the pump station manufacturer shall prove financial stability and ability to produce the station within the specified delivery schedules. Evidence of facilities, equipment and expertise shall demonstrate the manufacturer's commitment to long term customer service and product support. B. Pump Performance Certifications 1. Solids Handling Capability a. All internal passages, impeller vanes, and recirculation ports shall pass a .3 " spherical solid. Smaller internal passages that create a maintenance nuisance or interfere with priming and pump performance shall not be permitted. Upon request from the engineer, certified drawings showing size and location of the recirculation port(s) shall be submitted for approval. • 2. Reprime Performance a. Consideration shall be given to the sanitary sewage service anticipated, in which debris is expected to lodge between the suction check valve and its seat, resulting in the loss of the pump suction leg, and siphoning of liquid from the pump casing to the approximate center line of the impeller. Such occurrence shall be considered normal, and the pump must be capable of automatic, unattended operation with an air release line installed. b. During unattended operation, the pump shall retain adequate liquid in the casing to insure automatic repriming while operating at its rated speed in a completely open system. The need for a suction check valve or external priming device shall not be required. c Pump must reprime /6 vertical feet at the specified speed and impeller diameter. Reprime lift is defined as the static height of the pump suction above the liquid, while operating with only one-half of the liquid remaining in the pump casing. The pump must reprime and deliver full capacity within five minutes after the pump is energized in the reprime condition. Reprime performance must be confirmed with the following test set-up: • 6x6 Above Ground Specifications Revised: 10-1-97 4 PS -00485 CSI Format • • • 1) A check valve to be installed down stream from the pump discharge flange. The check valve size shall be equal (or greater than) the pump discharge diameter. 2) A length of air release pipe shall be installed between pump and the discharge check valve. This line shall be open to atmosphere at all times duplicating the air displacement rate anticipated at a typical pump station fitted with an air release valve. 3) The pump suction check valve shall be removed. No restrictions in the pump or suction piping will prevent the siphon drop of the suction leg. Suction pipe configuration for reprime test shall incorporate a 2 feet minimum horizontal run, a 90° elbow and vertical run at the specified lift. Pipe size shall be equal to the pump suction diameter. 4) Impeller clearances shall be set as recommended in the pump service manual. 5) Repeatability of performance shall be demonstrated by testing five consecutive reprime cycles. Full pump capacity (flow) shall be achieved within five minutes during each cycle. 6) Liquid to be used for reprime test shall be water. 3. Upon request from the engineer, certified reprime performance test results, prepared by the manufacturer, and certified by a registered professional engineer, shall be submitted for approval prior to shipment. C. Factory System Test 1. All internal components including the pumps, motors, valves, piping and controls will be tested as a complete working system at the manufacturer's facility. Tests shall be conducted in accordance with Hydraulic Institute Standards at the specified head, capacity, rated speed and horsepower. Factory operational test shall simulate actual performance anticipated for the complete station. 2. Upon request from the engineer, the operational test may be witnessed by the engineer, and/or representatives of his choice, at the manufacturer's facility. D. Manufacturer's Start-up Services 1. The manufacturer's technical representative shall inspect the completed installation, correct or supervise the correction of any defect or malfunction, and instruct operating personnel in the proper operation and maintenance of the equipment as described in Part 3 of this section. 1.6. MANUFACTURER'S WARRANTY 6x6 Above Ground Specifications Revised: 10-1-97 5 PS -00485 CSI Format • • A. All components of the pump station shall be manufactured, assembled and tested as a unit by a single supplier. The pumping station must be a standard catalog item with the manufacturer. The supplier must assume system responsibility. The complete pump station assembly must be warranted by the manufacturer. Individual component warranties are desirable. However, individual warranties honored solely by the manufactures of each pump station component will not be acceptable. B. The pump station manufacturer shall warrant all equipment to be of quality construction, free of defects in material and workmanship. A written warranty shall include specific details described below. 1. Fiberglass components of the station enclosure shall be warranted for 10 years to resist W damage, corrosion from moisture or corrosive soils, or physical failures occurring in normal service, without the need for special protective coatings, when installed according to the manufacturer's recommendations. 2. All other equipment, apparatus, and parts furnished shall be warranted for one (1) year, excepting only those items that are normally consumed in service, such as light bulbs, oils, grease, packing, gaskets, 0 -rings, etc: The pump station manufacturer shall be solely responsible for warranty of the station and all components. 3. The pump shaft seal shall be warranted for a minimum of four (4) years from date of shipment. Should the seal fail within the first year, the manufacturer shall furnish a new seal, without charge to • owner, f.o.b. factory. The warranty replacement cost for seals after the first year will be pro -rated as follows: Failure Within Percent New Price 2 years 25% 3 years 500 4 years 750 4. Components failing to perform as specified by the engineer, or as represented by the manufacturer, or as proven defective in service during the warranty period, shall be replaced, repaired, or satisfactorily modified by the manufacturer without cost of parts or labor to the owner. C. It is not intended that the station manufacturer assume liability for consequential damages or contingent liabilities arising from failure of any vendor supplied product or part which fails to properly operate, however caused. Consequential damages resulting from defects in design, or delays in delivery are also beyond the manufacturer's scope of liability. D. The warranty shall become effective upon the acceptance by the purchaser or the purchaser's authorized agent, or sixty (60) days after installation, or ninety (90) days after shipment, whichevez• occurs first. 6x6 Above Ground Specifications Revised: 10-1-97 6 PS -00485 CSI Format • • • 2. PART - PRODUCT 2.1. MANUFACTURER A. The specifications and project drawings depict equipment and materials manufactured by The Gorman -Rupp Company which are deemed most suitable for the service anticipated. It is not intended, however, to eliminate other products of equal quality and performance. The contractor shall prepare his bid based on the specified equipment for purposes of determining low bid. Award of a contract shall constitute an obligation to furnish the specified equipment and materials. B. After execution of the contract, the contractor may offer substitutions to the specified equipment for consideration. The equipment proposed for substitution must be superior in construction and performance to that specified in the contract, and the higher quality must be demonstrated by a list of current users of the proposed equipment in similar installations. C. In event the contractor obtains engineer's approval for equipment substitution, the contractor shall, at his own expense, make all resulting changes to the enclosures, buildings, piping or electrical systems as required to accommodate the proposed equipment. Revised detail drawings illustrating the substituted N equipment shall be submitted to the engineer prior to acceptance. • • D. It will be assumed that if the cost to the contractor is less for the proposed substitution, then the contract price shall be reduced by an amount equal to the savings. 2.2. STATION ENCLOSURE A. The station enclosure shall contain and protect all pumps, interior piping, valves and associated controls. Enclosure shall incorporate the following design and service features: 1. Access panels must be supplied on all sides. Location and size shall permit access for routine maintenance functions such as pump and motor inspection, drive belt adjustment, and pump cleanout. Panels shall be secured with tamper -proof hardware. // a 2 A continuous hinge and latch shall be installed on at leant two access panels. The hinged panels shall allow easy access to the electrical controls for frequent adjustments and inspections. A two-point mechanical latch assembly shall secure the panel at top and bottom. Latch handle locks shall be match keyed, requiring only one key to open all access panels. 3 A vent in one access panel shall allow free air flow for enclosure ventilation. 4. The complete station enclosure, less base, must be completely removable after disengaging reusable tamper -proof hardware. After disassembly, no portion of the enclosure (except electrical 6x6 Above Ground Specifications Revised: 10-1-97 7 PS -00485 CSI Format • • service entrance) shall project above the base surface to interfere with maintenance or endanger personnel. 5. Disassembly and removal of the enclosure shall require no more than two people working without assistance of lifting equipment. B. Station enclosure shall be manufactured of molded reinforced orthophthalic polyester resins with a minimum of 30% fiberglass, and a maximum of 70% resin. Resin fillers or extenders shall not be used. 1. Chopped glass fibers of 1 1/4 inch average length shall be sprayed and rolled. Major design consideration shall be given to_ structural stability, corrosion resistance, and watertight integrity. The polyester laminates shall provide a balance of mechanical, chemical, and electrical properties to insure long life. They must be impervious to micro-organisms, mildew, mold, fungus, corrosive liquids, and gases which are expected to be present in the environment surrounding the wet well. 2. All interior surfaces of the housing shall be coated with a polyester resin -rich finish providing maintenance -free service, abrasion resistance, and protection from sewage, greases, oils, gasoline, and other common chemicals. 3. Outside surfaces of the enclosure shall be coated with gel -coat pigmented resin to insure long maintenance -free life and UV protection. Color used shall de-emphasize the presence of dirt, • grease, etc. C. Station base shall be constructed of pre -cast, reinforced concrete encapsulated in a fiberglass mold. The design shall resist deformation of the structure during shipping, lifting, or handling. Base shall incorporate drainage provisions, and an opening sized to permit installation of piping and service connections to the wet well. After installation, the opening shall serve as a grout dam to be utilized by the contractor. The base shall incorporate anchor bolt recesses for securing the complete station to a concrete pad (supplied by the contractor) in accordance with the project plans. D. A blower mounted in the station. roof shall be sized to exchange station air volume at least once every two minutes. Blower motor shall energize automatically at approximately 70°F, and turned off at 55°F. The blower motor control circuit shall incorporate a thermal -magnetic circuit breaker providing overcurrent and overload protection. Exhaust and inlet locations shall prevent the entrance of rain, snow, or debris. * (See Optional Pump and Station Accessory for STATION HEATER) * (See Optional Pump and Station Accessory for STATION INSULATION PACKAGE) * (See Optional Pump and Station Accessory for STATION LIGHT ) 6x6 Above Ground Specifications Revised: 10-1-97 8 PS -00485 CSI Format • • • • • • 2.3. PUMP DESIGN A. Pumps shall be horizontal, self -priming centrifugal type, specifically for handling raw, unscreened, domestic sewage. Pump solids handling capability and performance shall be in accordance with requirements listed under GENERAL of this section. B. Materials and Construction Features designed sanitary criteria PART 1 - 1. Pump casing: Casing shall be cast iron Class 30 with integral volute scroll. Casing shall incorporate following features: a. Mounting feet sized to prevent tipping or binding when pump is completely disassembled for maintenance. b. Fill port cover plate, 3 1/2" diameter, shall be opened after loosening a hand nut/clamp bar assembly. In consideration for safety, hand nut threads must provide slow release of pressure, and the clamp bar shall be retained by detent lugs. A Teflon gasket shall prevent adhesion of the fill port cover to the casing. c. Casing drain plug shall be at least 1 1/4" NPT to insure complete and rapid draining. d. Liquid volume and recirculation port design shall be consistent with performance criteria listed under PART 1 - GENERAL of this section. 2. Cover plate: Cover plate shall be cast iron Class 30. Design must incorporate following maintenance features: a. Retained by hand nuts for complete access to pump interior. Cover plate removal must provide ample clearance for removal of stoppages, and allow service the impeller, seal, wear plate or check valve without removing suction or discharge piping. b. A replaceable wear plate secured to the cover studs and nuts shall be AISI 1018 HRS. c. In consideration for safety, a pressure relief supplied in the cover plate. Relief valve shall PSI. plate by weld valve shall be open at 75-200 d. 0 -ring of Buna-N material shall seal cover plate to pump casing. 3. Rotating Assembly: A rotating assembly, shaft, mechanical shaft seal, lip seals, bearing housing must be removable as disturbing the pump casing or piping. following features: a. Seal plate and bearing housing shall Separate oil filled cavities, vented 6x6 Above Ground Specifications Revised: 10-1-97 which includes impeller, bearings, seal plate and a single unit without Design shall incorporate be cast iron Class 30. to atmosphere, shall be PS -00485 CSI Format • • provided for shaft seal and bearings. Cavities must be cooled by the liquid pumped and lip seals will prevent leakage of oil. The bearing cavity to have an oil level sight gauge and fill plug check valve. The check valve shall vent the cavity but prevent introduction of moist air to the bearings. b. Impeller shall be ductile iron, two -vane, semi -open, non -clog, with integral pump out vanes on the back shroud. Impeller shall thread onto the pump shaft and be secured with a lockscrew and conical washer. c. Shaft shall be AISI 41L40 alloy steel unless otherwise specified by the engineer, in which case AISI 17-4 PH stainless steel shall be supplied. d. Bearings shall be anti -friction ball or tapered roller type of proper size and design to withstand all radial and thrust loads expected during normal operation. Bearings shall be oil lubricated from a dedicated reservoir. Pump designs which use the same oil to lubricate the bearings and shaft seal shall not be acceptable. e. Shaft seal shall be oil lubricated mechanical type. The stationary and rotating seal faces shall be tungsten titanium carbide alloy. Each mating surface shall be lapped to one-half light band flatness (5.8 millionths of an inch), as measured by an optical flat under monochromatic light. The stationary seal seat shall be double floating by virtue of a dual 0 -ring design; an external 0 -ring secures the stationary seat to the seal• plate, and an internal 0 -ring holds the faces in alignment during periods of mechanical or hydraulic shock (loads which cause shaft deflection, vibration, and axial/radial movement). Elastomers shall be viton. Cage and spring to be AISI 316 stainless steel. Seal shall be oil lubricated from a dedicated reservoir. The same oil shall not lubricate both shaft seal and shaft bearings. Seal shall be warranted in accordance with requirements listed under PART 1 - GENERAL of this section. f. Adjustment of the impeller face clearance (distance between impeller and wear plate) shall be accomplished by external means. Stainless steel adjusting shims shall be used to move the entire rotating assembly as a unit when adjusting the working clearances. Clearance adjustment which requires movement of the shaft only, thereby adversely affecting seal working length or impeller back clearance, shall not be acceptable. Suction check valve shall be molded Buna-N with integral steel and nylon reinforcement. A blow-out center shall protect pump casing from hydraulic shock or excessive pressure. Removal or installation of the check valve must be accomplished through the cover plate opening, without disturbing the suction piping. Sole function of check valve shall be to save energy by eliminating need to reprime after each pumping cycle. Pumps requiring suction check valve to assist reprime will not be acceptable. g• 6x6 Above Ground Specifications Revised: 10-1-97 10 PS -00485 CSI Format • • h. Spool flanges shall be one-piece cast iron, class 30 fitted to suction and/or discharge ports. Each spool shall have one 1-1/4" NPT and one 1/4" NPT tapped hole with pipe plugs for mounting gauges or other equipment. C. Serviceability 1. The pump manufacturer shall demonstrate to the engineer's satisfaction that consideration has been given to reducing maintenance costs. 2. No special tools shall be required for replacement of any components within the pump. * (See Optional Pump and Station Accessory for PUMP DRAIN KIT) * (See Optional Pump and Station Accessory for SPARE PARTS KIT) 2.4. VALVES AND PIPING A. Check Valve: Each pump shall be equipped with a full flow type check valve, capable of passing a 3" spherical solid, with flanged ends and be fitted with an external lever and spring. The valve seat shall be constructed of stainless steel and shall be replaceable. The valve body shall be cast iron and incorporate a 411 3" cleanout port. Valve clapper shall have a molded neoprene seating surface incorporating low pressure sealing rings. Valve hinge pin and internal hinge arm shall be stainless steel supported on each end in brass bushings, sealing bushing shall have double o -rings. O -rings shall be easily replaceable without requiring access to interior of valve body. Valve shall be rated at 175 PSI water working pressure, 350 PSI hydrostatic test pressure. Valves other than full flow type or valves mounted in such a manner that prevents the passage of a 3" spherical solid shall not be acceptable. B. Plug Valve: A 3 -way plug valve must allow either or both pumps to be isolated from the force main. The plug valve shall be non -lubricated, tapered type. Valve body shall be semi -steel with flanged end connections drilled to 125 pound standard. The drip -tight shutoff plug shall be mounted in stainless steel bearings, and shall have a resilient facing bonded to the sealing surface. Valve shall be operated with a single lever actuator providing lift, turn, and reseat action. The lever shall have a locking device to hold the plug in the desired position. * (See Optional Pump and Station Accessory for AIR RELEASE VALVE) * (See Optional Pump and Station Accessory for. GAUGE KIT) * (See Optional Pump and Station Accessory for VOLUTE CASING HEATERS) C. Piping 6x6 Above Ground Specifications Revised: 10-1-97 11 PS -00485 CSI Format • • 1. Flanged header pipe shall be centrifugally cast, ductile iron, complying with ANSI/AWWA A21.51/C115 and class 53 thickness. 2. Flanges shall be cast iron class 125 and Comply with ANSI B16.1. 3. Pipe and flanges shall be threaded and suitable thread sealant applied before assembling flange to pipe. 4. Bolt holes shall be in angular alignment within 1/2° between flanges. Flanges shall be faced with a gasket finish having concentric grooves a minimum of 0.01 inch deep by approximately 0.03 inch wide, with a minimum of three grooves on any given surface spaced a maximum of 1/4 inch apart. D. Supports and Thrust Blocks: Contractor must insure all pipes connected to the pump station are supported to prevent piping loads from being transmitted to pumps or station piping. Pump station discharge force main piping shall be anchored with thrust blocks where shown on the contract drawings. 2.5. DRIVE UNIT A. Motors (Note; Maximum motor frame size is 284T open drip -proof.) 1. Pump motors shall be 75 HP, horizontal ODP, 1,800 RPM, NEMA design B with cast iron frame with copper windings, induction type, with class F insulation and 1.15 Service Factor for norma starting torque and low starting current characteristics, suitabl for continuous service. The motors shall not overload at the design condition or at any head in the operating range as specified. Motors shall be suitable for operation using the utility power available specified in part 1 of this section. 2. Motors shall be tested in accordance with provisions of ANSI/IEEE Std. 112, Method B. B. Drive Transmission 1 Power to pumps transmitted V -belt drive assemblies. The sheave/belt combination shall provide the speed ratio needed to achieve the specified pump operating conditions. 2 Each drive assembly shall utilize at least two V -belts providing minimum a combined safety factor of 1.5. Single belt drives or systems with a safety factor of less than 1.5 are not acceptable. Computation of safety factors shall be based on performance data published by the drive manufacturer. 3 The pump manufacturer shall submit power transmission calculations which document the following: a. Ratio of pump/motor speed. b. Pitch diameter of driver and driven sheaves. c. Number of belts required per drive. 6x6 Above Ground Specifications Revised: 10-1-97 12 PS -00485 CSI Format • •tN • • s s d. Theoretical horsepower transmitted per belt, based on vendor's data. e. Center distance between pump and motor shafts. f. Arc -length correction factor applied to theoretical transmitted. Service factor applied to established design horsepo Safety factor ratio of power transmitted/brake required. 4. Pump drives to be enclosed on all sides by a guard constructed of fabricated steel or combination of materials including expanded, perforated, or solid sheet metal. No opening to a rotating member shall exceed 1/2 inch. g- h. horsepower wer. horsepower a. Guards must be completely removal without interference from any unit component, and shall be securely fastened and braced to the unit base. b. Metal to be free from burrs and sharp edges. Structural joints shall be continuously welded. Rivet spacing on panels shall not exceed five inches. Tack welds shall not exceed four inch spacing. c. The guard shall be finished with one coat of gray W.R. non -lift primer and one coat of orange acrylic alkyd W.R. enamel in accordance with section 3, Color Definitions of ANSI 253.1; Safety Color Code for Marking Physical Hazards. 2.6. Finish A. Pumps, piping, and exposed steel framework shall be cleaned prior to painting. Exposed surfaces to be coated with one coat gray W.R. non -lift primer and one coat white acrylic alkyd W.R. enamel. Paint shall be low VOC, alkyd based, high solids, semi -gloss white enamel for optimum illumination enhancement, incorporating rust inhibitive additives. The finish coat shall be 1.0 to 1.25 MIL dry film thickness (minimum), resistant to oil mist exposure, solvent contact, and salt spray. The factory finish shall allow for over -coating and touch up after final installation. ELECTRICAL CONTROL COMPONENTS Panel Enclosure Electrical control equipment shall be mounted within a common NEMA 1 stainless steel, dead front type control enclosures. Doors shall be hinged and sealed with a neoprene gasket and equipped with captive closing hardware. Control components shall be mounted on removable steel back panels secured to enclosure with collar studs. 2. All control devices and instruments shall be mounted using threaded fasteners, and shall be clearly labeled to indicate function. B. Branch Components 6x6 Above Ground Specifications Revised: 10-1-97 13 PS -00485 CSI Format • • * (See Optional Controls and Accessory for UL LABEL REQUIREMENT) 1. Motor branch components to be of highest industrial quality,0 secured to the sub -plate with machine screws and lockwashers. Mounting holes shall be drilled and tapped; Self -tapping screws shall not be used to mount any component. 2. Circuit Breakers and Operating Mechanisms a. A properly sized heavy duty circuit breaker, with RMS interrupting rating of amperes at volts, shall be furnished for each pump motor. The circuit breakers must be sealed by the manufacturer after calibration to prevent tampering. b. An operating mechanism installed on each motor circuit breaker shall penetrate the control panel door. A padlockable operator handle shall be secured on the exterior surface. Interlocks must prevent opening the door until circuit breakers are in "OFF" position. 3. Motor Starters a. An open frame, across -the -line, NEMA rated magnetic starter with under -voltage release, and overload protection on all three phases, shall be furnished for each pump motor. Starters_of NEMA size 1 and above shall allow addition of at least two auxiliary contacts. Starters rated "0", "00", or fractional size are no. acceptable. Power contacts to be double -break type made of cadmium oxide silver. Coils to be epoxy molded for protection from moisture and corrosive atmospheres. Contacts and coils shall be easily replaceable without removing the starter from its mounted position. Each starter shall have a metal mounting plate for durability. 4. Overload Relays a. Overload relays to be block -type with melting alloy spindles, having visual trip indication with trip free operation. Pressing the overload reset lever shall not actuate the control contact until after the overload spindle has reset. Resetting the overload reset lever will cause a snap -action control contact to reset, thus re-establishing a control circuit. Overload relays to be manual reset only, and not convertible to automatic reset. Trip settings shall be governed by the heater element only, and not by adjustable settings. Heater elements must provide NEMA class 20 trip times, selected in accordance with actual motor nameplate data. b. A reset pushbutton, mounted through the control panel door, shall permit resetting the overload relays without opening the door. * (See Optional Controls and Accessory for TRANSIENT VOLTAGE SURG• SUPPRESSOR) 6x6 Above Ground Specifications PS -00485 Revised: 10-1-97 14 CSI Format • • * (See Optional Controls and Accessory for SINGLE or THREE PHASE VOLTAGE • MONITOR) * (See Optional Controls and Accessory for PUMP START DELAY) * (See Optional Controls and Accessory for PANEL HEATER) C. Control Circuit 1. A normal duty thermal -magnetic circuit breaker shall protect all control circuits by interrupting control power. 2. Pump mode selector switches shall permit manual start or stop of each pump individually, or permit automatic operation under control of the liquid level control system. Manual operation shall override all shutdown systems, except the motor overload relays. Selector switches to be oil -tight design with contacts rated NEMA A300 minimum. 3. Pump alternator relay to be electro -mechanical industrial design. Relay contacts to be rated 10 amperes minimum at 120 volts non -inductive. A switch shall permit the station operator to select automatic alternation of pumps, to select pump number one to be "lead" for each pumping cycle, or to select pump number two to be "lead" pump for each pumping cycle. N 4. Six digit elapsed time meter (non -reset type) shall be connected to each motor starter to indicate total running time of each pump in "hours" and "tenths of hours". An integral pilot light shall be wired in parallel to indicate that the motor is energized and should be running. 5. A high pump temperature protection circuit shall override the level control and shut down the pump motor(s) when required to protect the pump from excessive temperature. A thermostat shall be mounted on each pump casing and connected to a pump shutdown circuit. If casing temperature rises to a level sufficient to cause damage, the thermostat causes the shutdown circuit to interrupt power to the motor. A visible indicator, mounted through the control panel door shall indicate motor stopped due to high pump temperature. The motor shall remain locked out until the pump has cooled and circuit has been manually reset. Automatic reset of this circuit is not acceptable. 6. A duplex ground fault receptacle providing 115 VAC, 60 Hz, single phase current, will be mounted on the side of the control enclosure. Receptacle circuit shall be protected by a 15 ampere thermal -magnetic circuit breaker. * (See Optional Controls and Accessory for AUXILIARY POWER TRANSFORMER) • 7. Wiring 6x6 Above Ground Specifications Revised: 10-1-97 15 PS -00485 CSI Format • • a. The pump station, as furnished by the manufacturer, shall be completely wired, except for power feed lines to the branch/ ft breakers and final connections to remote alarm devices. b. All wiring, workmanship, and schematic wiring diagrams shall comply with applicable standards and specifications of the National Electric Code (NEC). c. All user serviceable wiring shall be type MTW or THW, 600 volts, color coded as follows: 1) Line and Load Circuits, AC or DC power Black 2) AC Control Circuit Less Than Line Voltage Red 3) DC Control Circuit Blue 4) Interlock Control Circuit, from External Source Yellow 5) Equipment Grounding Conductor Green 6) Current Carrying Ground White 7) Hot With Circuit Breaker Open Orange d. Control circuit wiring inside the panel, with exception of internal wiring of individual components, shall be 16 gauge minimum, type MTW or THW, 600 volts. Power wiring to be 14 gauge minimum. Motor branch wiring shall be 10 gauge minimum. e. Motor branch and other power conductors shall not be loaded above 60°C temperature rating, on circuits of 100 amperes or less, nor above 75°C on circuits over 100 amperes. Wires must be clearly numbered at each end in conformance with applicable* standards. A11 wire connectors in the control panel shall be ring tongue type with nylon insulated shanks. All wires on the sub -plate shall be bundled and tied. All wires extending from components mounted on door shall terminate at a terminal block mounted on the back panel. All wiring outside the panel shall be routed through conduit. f. Control wires connected to door mounted components must be tied and bundled in accordance with good commercial practice. Bundles shall be made flexible at the hinged side of the enclosure. Adequate length and flex shall allow the door to swing full open without undue stress or abrasion. Bundles shall be held on each side of hinge by mechanical fastening devices. 8. Conduit a. Factory installed conduit shall conform to following requirements: 1) All conduit and fittings to be UL listed. 2) Liquid tight flexible metal conduit to be constructed of smooth, flexible galvanized steel core with smooth abrasion resistant, liquid tight polyvinyl chloride cover. 3) Conduit to be supported in accordance with articles 346, 347, and 350 of the National Electric Code. 4) Conduit shall be sized according to the National Electric Code. 9. Grounding 6x6 Above Ground Specifications Revised: 10-1-97 16 PS -00485 CSI Format • • a. Station manufacturer shall ground all electrical equipment inside the pump station to the control panel back plate. All paint must be removed from the grounding mounting surface before making final connection. b. The contractor shall provide an earth driven ground connection to the pump station at the main grounding lug in accordance with the National Electric Code (NEC). 10. Equipment Marking a. Permanent corrosion resistant name plate(s) shall be attached to the control and include following information: 1) Equipment serial number 2) Supply voltage, phase and frequency 3) Current rating of the minimum main conductor 4) Electrical wiring diagram number 5) Motor horsepower and full load current 6) Motor overload heater element 7) Motor circuit breaker trip current rating 8) Name and location of equipment manufacturer b. Control components shall be permanently marked using the same identification keys shown on the electrical diagram. Labels shall be mounted adjacent to device being identified. • c. Switches, indicators, and instruments mounted through the control panel door shall be labeled to indicate function, position, etc. Labels shall be mounted adjacent to, or above the device. • * (See Optional Controls and Accessory for MERCURY FLOAT SWITCH TYPE CONTROL) * (See Optional Controls and Accessory for INTRINSICALLY SAFE FLOAT TYPE CONTROL) * (See Optional Controls and Accessory for SUBMERSIBLE TRANSDUCER TYPE CONTROL) 2.8. LIQUID LEVEL CONTROL (EPS Air Bubbler Type) /VO/ ePL/Cg3-t 1. The level control system shall start and stop pump motors in response to changes in wet well level. It shall be an air bubbler type, with a pressure transducer integral to the electronic pressure switch. The transducer to work in conjunction with air pressure in the bubbler piping, which is mounted in the wet well, to provide a proportional level signal to the remainder of the level control system. 2. The electronic pressure switch shall continuously monitor the wet well level, permitting the operator to read the water level at any time. Upon operator selection of automatic operation, the 6x6 Above Ground Specifications Revised: 10-1-97 17 PS -00485 CSI Format • • electronic pressure switch shall start motor for one pump when liquid level rises to the "lead pump start level". When the liquid is lowered to the "lead pump stop level", the electronic pressure • switch shall stop this pump. These actions shall constitute one pumping cycle. Should the wet well level continue to rise, electronic pressure switch will start the second pump when the liquid reaches the "lag pump start level" so that both pumps operate together. These levels shall be easily adjustable using set point trim pots. 3. The level control system shall work in conjunction with an alternator relay to select first one pump, then the second pump, to run as "Lead" pump. Alternation will occur at the end of each pumping cycle. 4. Electronic Pressure Switch a. Electronic pressure switch shall contain all integral components to perform pressure sensing, signal conditioning, EMI and RFI suppression, DC power supply and 120 volt outputs. Comparators shall be solid state, and integrated with other components to perform functions described below. b. Electronic pressure switch shall operate on supply voltage of 108 VAC to 132 VAC, 60 Hertz, in an ambient temperature range of -18°C (0°F) through +55°C (131°F) . Control range shall be 0 to 12.0 feet of water with an overall repeat accuracy of (plus/minus) 0.1 feet of water. c. Electronic pressure switch shall consist of the following integral components: Pressure sensor, display, electronic comparators and output relays. 1) Pressure sensor: a strain gauge transducer receives input pressure from the air bubbler system. The transducer converts the input to a proportional electrical signal for distribution to the display and electronic comparators. The transducer output is filtered to prevent control response to level pulsations or surges. The transducer range shall be 0-15 PSI, temperature compensated from -40°C (-40°F) through +85°C (185°F), with repeat accuracy of (+/-) 0.25% full scale about a fixed temperature. Transducer over -pressure rating shall be 3 times full scale. 2) Digital panel meter: upon operator selection, displays liquid level in the wet well, and the preset start and stop levels for both lead and lag pump. The meter is be a 3-1/2" digit display calibrated to read out directly in feet of water, accurate to within one-tenth foot (0.1 foot), with full scale indication of not less than 12 feet. 3) Electronic comparator: adjustable setpoints to control levels at which lead and lag pumps start and stop. Each of level setting is adjustable, and accessible to the operator without opening the electronic pressure switch or any cover panel on the electronic pressure switch. Comparators allow the operator to read selected levels on the display. Adjustments shall not require hard wiring, use of electronic test equipment, • artificial level simulation or introduction of pressure to the electronic pressure switch. 6x6 Above Ground Specifications Revised: 10-1-97 18 PS -00485 CSI Format • • 1 4) Output relays: individual solid state relay provided each output function. Relay input to be optically isolated from its output incorporating zero crossover switching to provide high immunity to electrical noise. The "ON" state of each relay shall be indicated by illumination of a light emitting diode. The output of each relay to be individually fused providing overload and short circuit protection. Each output relay has inductive load rating equivalent to one NEMA size 4 contactor. A pilot relay shall be used for loads greater than a size 4 contactor. d. Electronic pressure switch shall be subjected to severe environmental tests to minimize field failures. Tests shall include, but is not limited to exposure to elevated temperatures and burn -in under load. Further testing may be conducted at the manufacturer's discretion. e. Electronic pressure switch to be equipped with replaceable plug-in integrated circuits, output relays and fuses. The main circuit board assembly shall be provided with keyed plug-in connections to "off -board" components permitting main board removal without de -soldering. All printed circuits protected by a conformal coating applied to both sides to resist moisture or fungus. f. Circuit design in which application of power to the lag pump motor starter is contingent upon completion of the lead pump circuit shall not be acceptable. N g. Electronic pressure switch shall utilize an electronic 411 comparator and solid state output relay to alert maintenance personnel to a high water level in the wet well. If liquid reaches the preset alarm level, the output relay energizes an alarm signal, completing a 115 VAC circuit for external alarm device. An indicator, visible from front of control panel, shall indicate high level condition exists (Low level alarm is optional). The alarm signal shall be maintained until wet well level is lowered and alarm circuit manually reset. A SPDT dry contact, wired to terminal blocks shall be furnished. h. An alarm silence switch shall provide maintenance personnel a means to de -energize the external alarm device while corrective actions are under way. After silencing the alarm, manual reset of the alarm signal shall provide automatic reset of the alarm silence relay. • * (See Optional Controls and Accessory for ALARM LIGHT EXTERNAL) * (See Optional Controls and Accessory for ALARM HORN EXTERNAL) 5. Air Bubbler System and Piping a. Two vibrating reed, industrial rated, air pumps shall deliver free air at approximately 5 CFH at a pressure not to exceed 7 PSI. Liquid level control systems utilizing air compressors which deliver greater quantities of air at higher pressures, and require pressure reducing valves, air storage reservoirs, and other maintenance nuisance items are not acceptable. 6x6 Above Ground Specifications Revised: 10-1-97 19 PS -00485 CSI Format i • b. Selector switch provided for manual alternation of air pumps. The switch allows selection of either pump to operate continuously. Switch shall be oil -tight design with contacts rated NEMA A300 minimum. c. An air bell constructed of 3 inch PVC pipe shall be supplied for field installation in the wet well. The air bell must be installed at the end of the.3/8" NPT air bubbler line per manufacturer's instructions. d. An air flow indicator gauge mounted on the front of the control panel, and connected to the air bubbler piping shall provide visual indication of air flow rate. Gauge to be graduated in cubic feet per hour. * (See Optional Controls and Accessory for AUTOMATIC TELEPHONE DIALER) 3. PART - EXECUTION 3.1. EXAMINATION A. Contractor shall off-load equipment at installation site using equipment of sufficient size and design to prevent injury or damage. Station manufacture shall provide written instruction for proper handling. Immediately after off-loading, contractor shall inspect complete pump station and appurtenances for shipping damage or missing parts. Any damage or discrepancy shall be noted in written claim with shipper prior to accepting delivery. Validate all station serial numbers and parts lists with shipping documentation. Notify the manufacturers representative of any unacceptable conditions noted with shipper. 3.2. INSTALLATION A. Install, level, align, and lubricate pump station as indicated on project drawings. Installation must be in accordance with written instructions supplied by the manufacture at time of delivery. B. Suction pipe connections are vacuum tight. Fasteners at all pipe connections must be tight. Install pipe with supports and thrust blocks to prevent strain and vibration on pump station piping. Install and secure all service lines (level control, air release valve or pump drain lines) as required in wet well. C. Check motor and control data plates for compatibility to site voltage. Install and test the station ground prior to connecting line voltage to station control panel. D. Prior to applying electrical power to any motors or control equipment, check all wiring for tight connection. Verify that protective devices (fuses and circuit breakers) conform to project design documents. Manually operate circuit breakers and switches to ensure operation without binding. Open all circuit breakers and • disconnects before connecting utility power. Verify line voltage, phase sequence and ground before actual start-up. 6x6 Above Ground Specifications Revised: 10-1-97 20 PS -00485 CSI Format m N • • • E. After all anchor bolts, piping and control connections are installed, completely fill the grout dam in the pump station base with non -shrink grout. 3.3. FIELD QUALITY CONTROL A. Operational Test 1. Prior to acceptance by owner, an operational test of all pumps, drives, and control systems shall be conducted to determine if the installed equipment meets the purpose and intent of the specifications. Tests shall demonstrate that all equipment is electrically, mechanically, structurally, and otherwise acceptable; it is safe and in optimum working condition; and conforms to the specified operating characteristics. 2. After construction debris and foreign material has been removed form the wet well, contractor shall supply clear water volume adequate to operate station through several pumping cycles. Observe and record operation of pumps, suction and discharge gage readings, ampere draw, pump controls, and liquid level controls. Check calibration of all instrumentation equipment, test manual control devices, and automatic control systems. Be alert to any undue noise, vibration or other operational problems. B. Manufacturers Start-up Services 1. Co-ordinate station start-up with manufactures technical representative. The representative or factory service technician will inspect the completed installation. He will calibrate and adjust instrumentation, correct or supervise correction of defects or malfunctions, and instruct operating personnel in proper operation and maintenance procedures. 3.4. CLEANING A. Prior to acceptance, inspect interior and exterior of pump station for dirt, splashed material or damaged paint. Clean or repair accordingly. Remove from the job site all tools, surplus materials, scrap and debris. 3.5. PROTECTION A. The pump station should be placed into service immediately. If operation is delayed, drain water from pumps and piping. Open motor circuit breakers and protect station controls and interior equipment from cold and moisture. END OF SECTION 6x6 Above Ground Specifications Revised: 10-1-97 21 PS -00485 CSI Format • • OPTIONAL PUMP FEATURES and STATION ACCESSORIES NOTICE The following section provides specifications for optional pump features or station accessories. The desired items may be added to the body of the specification in the area designated by the asterisk (*). * (Optional Accessory for STATION HEATER) (O V. Station Heater: 1. Pump station shall be provided with a 1300/1500 watt, 115 volt electric heater with cord and grounding plug. Ungrounded heaters shall not be acceptable. * (Optional Accessory for STATION INSULATION) /VO . Insulation Package: 1. The pump station shall be furnished with 1" thick spray foam insulation, which shall be applied to the roof, doors, and corner panels. * (Optional Accessory for STATION LIGHT) k/.. Hand Lamp: 1. Pump station shall be provided with a 100 watt, 115 volt AC vapor -tight hand lamp with 25 feet of cord and grounding plug. Hand lamp shall be constructed of corrosion resistant materials, and shall be equipped with a guard and a clear globe. Ungrounded hand lamps may be supplied if provided with an effective means of double insulation. * (Optional Accessory for PUMP DRAIN KIT) Drain Kit: 1. Pumps to be supplied with a drain kit for ease of maintenance. The kit to contain 10' length of reinforced plastic hose with a female quick connect fitting at one end, and factory installed drain fittings in each pump. Fittings include a pipe nipple, bushing, bronze gate valve and male quick connect fitting. * (Optional Accessory for SPARE PUMP PARTS KIT) ISpare Parts Kit: 1. The following minimum spare parts shall be furnished with the pump station: a) One spare pump mechanical seal (complete with shaft sleeve). b) One cover plate 0 -Ring. c) One rotating assembly 0 -Ring. 6x6 Above Ground Specifications Revised: 10-1-97 22 PS -00485 CSI Format • • • • • d) One set of impeller clearance adjustment shims. * (Optional Accessory for VOLUTE CASING HEATERS) #p. Volute Casing Heater: 1. Pumps shall be provided with a thermostat mounted to the exterior of the volute casing and a _ watt 115 volt electric heater installed in the interior. It shall be energized at 43+/-3 degrees F to provide heat to the casing and eliminate the possibility of freezing. * (Optional Accessory for AIR RELEASE VALVE) ✓. Air Release Valves: 1. Each pump shall be equipped with an automatic air release valve, designed to vent air to atmosphere during initial priming, or unattended repriming cycles. Upon completion of the priming or repriming cycle, the valve shall automatically close to prevent recirculation. A visible indication of valve closure shall be evident, and shall operate solely on discharge pressure. Valves which connect to the suction line, or rely on vacuum pumps are not acceptable. 2. All valve parts exposed to sewage shall be cast iron, stainless steel, or similar corrosion resistant materials. Diaphragms shall be fabric -reinforced neoprene, or similar inert material. Valve design shall incorporate following maintenance features: a. A cleanout port, at least 3 inches in diameter, shall allow easy inspection, cleanout, and service. b. Valves shall be field adjustable for varying discharge heads. * (Optional Accessory for GAUGE KIT) Y• Gauge Kit 1. A gauge kit shall be supplied for each pump. Suction pressure must be monitored by a glycerin -filled compound gauge, and discharge pressure by a glycerin -filled pressure gauge. Gauges to be at least 4 inches in diameter, graduated in feet water column. Rated accuracy shall be to of full scale reading. Compound gauge shall be graduated -34 to +34 feet water column minimum. Pressure gauge to be graduated 0 to 140 feet water column minimum. 2. Gauges to be factory mounted on a resilient panel with frame assembly secured to pumps or piping. Gauge installations shall be complete with all hoses and fittings, including a shutoff valve for each gauge line at the point of connection to suction and discharge pipes. * (Optional Accessory for 3" or 4" PORTABLE PUMP DISCHARGE CONNECTION) 6x6 Above Ground Specifications Revised: 10-1-97 23 PS -00485 CSI Format • • No. Portable Pump Discharge Connection: 1. The station header pipe shall incorporate a 2 -way plug valve to• permit emergency access to the pump station force main after isolation of the pumps. Valve body shall be cast iron with flanged end connections drilled to 125 pound standard. The plug valve shall be non -lubricated type, furnished with a drip -tight shutoff plug mounted in stainless steel or Teflon over phenolic bearings, and shall have a resilient facing bonded to the sealing surface. 2. The bypass connection shall be accessible behind the hinged access panel on the wet well side of the station enclosure and shall terminate with a male OPW type quick connect fitting. 6x6 Above Ground Specifications Revised: 10-1-97 24 PS -00485 CSI Format 1 • • • • OPTIONAL CONTROLS AND ACCESSORIES NOTICE The following section provides specifications for optional accessories to the pump control panel. The desired items may be added to the body of the specification in the area designated by the asterisk (*). * (Optional Accessory for UL LABEL REQUIREMENT) UL Label Requirement: 1. Pump station controls shall conform to third party safety certification. The panel shall bear a serialized U.L. label listed for "Enclosed Industrial Control Panels". The enclosure, and all components mounted on the subpanel or control cover shall conform to U.L. descriptions and procedures. * (Optional Accessory for TRANSIENT VOLTAGE SURGE SUPPRESSOR) ✓. Transient Voltage Surge Suppressor: 1. The control panel shall be equipped with a transient voltage surge suppressor to minimize damage to the pump motors and control from N transient voltage surges. The suppressor shall utilize • silicon -oxide varistors encapsulated in a non-conductive housing. The arrestor shall have a current rating of 60,000 Amps, and a Joule rating of 1500. • * (Optional Accessory for PUMP START DELAY) 1. Pump Start Delay: 1. The control circuit for pump #2_shall be equipped with a time delay to prevent simultaneous motor starts. * (Optional Accessory for PANEL HEATER) NQ 1. The control panel shall be equipped with a panel heater to minimize the effects of humidity and condensation. The heater shall include a thermostat. * (Optional Accessory for THREE-PHASE VOLTAGE MONITOR) / Phase Monitor: 1. The control panel shall be equipped to monitor the incoming power and shut down the pump motors when required to protect the motor(s) from damage caused by phase reversal, phase loss, voltage unbalance, and low voltage. A time delay shall be provided to minimize nuisance trips. The motor(s) shall automatically restart when power conditions return to normal. 6x6 Above Ground Specifications Revised: 10-1-97 25 PS -00485 CSI Format • • * (Optional Accessory for SINGLE-PHASE VOLTAGE MONITOR) NO. Phase Monitor: 1. The control panel shall be equipped to monitor the incoming power and shut down the pump when required to protect the motor(s) from damage caused by voltage less than 830 of nominal. The motor(s) shall automatically restart when power conditions return to normal. * (Optional Accessory for AUXILIARY POWER TRANSFORMER) V< Auxiliary Power Transformer: 1. The lift station shall be equipped with a 3 KVA stepdown transformer to supply 115 volt, AC, single phase for the control and auxiliary equipment. The primary and secondary side of the transformer to be protected by a thermal magnetic circuit breaker, sized to meet the power requirements of the transformer. An operating mechanism shall penetrate the control panel door. and a padlockable operator handle shall be secured on the exterior surface. Interlocks must prevent opening the door until circuit breakers are in "OFF" position. * (Optional Accessory for ALARM LIGHT) AO. Alarm Light (External) : 1. Station manufacturer will supply one 115 VAC alarm light fixture with vapor -tight shatter resistant red globe, conduit box, and mounting base. The design must prevent rain water from collecting in the gasketed area of the fixture, between the base and globe. The alarm light will be shipped loose for installation by the contractor. * (Optional Accessory for ALARM HORN) IVO. Alarm Horn (External) : 1. Station manufacturer will supply one 115 VAC weatherproof alarm horn with projector, conduit box, and mounting base. The design must prevent rain water from collecting in any part of the horn. The alarm horn will be shipped loose for installation by the contractor. * (Optional Accessory for AUTOMATIC TELEPHONE DIALER) • A/0 3.6. AUTOMATIC TELEPHONE DIALER 4L4tP15 V/A "OW AhV( To "1,4,07- A. O 4I)TA. The dialer shall be a solid state component capable of dialing up to 16 phone numbers, each up to 24 digits in length. Phone numbers and standard pulse dialing of Touch Tone DTMF dialing are user programmable via the system's keyboard or touch tone phone. • B. Solid State Voice Message Recording and Playback 6x6 Above Ground Specifications Revised: 10-1-97 26 PS -00485 CSI Format • • • 1. The unit shall have two different categories of speech message capability, all implemented with permanent nonvolatile solid state circuitry with no mechanical tape mechanisms. The unit shall allow for message recording from a remote telephone as well as from the front panel. 2. User Field Recorded Messages: The user may record and re-record his own voice messages for each input channel and for the station ID. 3. There shall be no limit on the length of any particular message, within the overall available message recording time; which shall be 40 seconds for 4 channel units, 80 seconds for 8 channel units, and 160 seconds for 16 or more channels. 4. The unit shall allow selective recording of both Normal and Alarm advisory messages for each input channel. 5. The unit shall provide for automatic setting of the optimum speech memory usage rate for the total set of messages recorded in order to achieve optimum recording sound quality. 6. Circuit board switches or jumper straps shall not be acceptable means of manipulating message length or recording rates. 7. Permanent Resident Non -Recorded Messages: Permanent_ built-in 411 messages shall be included to support user programming operations, to provide supplemental warning messages such as advising that the alarms have been disabled, and to allow the unit to be fully functional even when the installer has not recorded any messages of his own. C. Local & Remote Programming Capabilities 1. The user may optionally elect to alter the following parameters from their standard normal default values via keyboard entry or remotely from any touch tone phone. 2. Alarm Call Grouping: Upon alarm activation, the system shall selectively call the correct phone numbers according to the current alarm(s). 3. Alarm Response Delay: .1 to 999.9 seconds. 4. Delay Between Alarm Call Outs: .1 to 99.9 minutes. 5. Alarm Reset Time: .1 to 99 hours or "NO RESET." 6. Incoming Ring Response (Answer) Delay: 1 to 20 rings. 7. Number of Message Repetitions: 1 to 20 repetitions. 8. Input Alarm Criteria: Each channel shall be independently configured for "Alarm On Open Circuit", "Alarm On Closed Circuit", and "No Alarm." 9. Autocall Test: When enabled, the unit shall place a single round of test calls, both at the time this function is enabled and also at regular subsequent intervals until this function is disabled at the keyboard. 10. Run Time Meter: Selected inputs shall accumulate and report the number of hours that its input contacts have been closed. 11. Remote System Microphone Activation. 12. Remote and Local Arming and Disarming of System. 6x6 Above Ground Specifications Revised: 10-1-97 27 PS -00485 CSI Format • • 13 Pulse Totalizer Function. D. User entered programming and voice messages shall be kept intact", even during power failures or when all power is removed for up to ten years. E. Acknowledgement of an alarm phone call is to be accomplished by pressing a touch tone "9" as the alarm call is being received, and/or by returning a phone call to the unit after having received an alarm call. F. The unit shall continuously monitor the presence of AC power and the status of four contact closure inputs. The unit shall optionally be field upgradeable to incorporate a total of 8, 16, 24, or 32 dry contact inputs. AC power failure, or violation of the alarm criteria at any input, shall cause the unit to go into alarm status and begin dial outs. The unit shall, upon a single program entry, automatically accept all input states as the normal non -alarm state; eliminating possible confusion about Normally Open versus Normally Closed inputs. Further, as a diagnostic aid, the unit shall have the capability of directly announcing the state of any given input as currently "Open Circuit" or "Closed Circuit", without disturbing any message programming. Each input channel shall also be independently programmable, without the need to manipulate circuit board switches or jumpers, as Normally Open or Normally Closed, or for No Alarm (Status Only) , or for Pulse Totalizing, or for Run Time Metering. G. Any dry contact input can be programmed to accumulate and report the number of hours their respective input circuits have been closed. Any such channels will never cause an alarm, but on inquiry will recite the channel's message according to the status of the input and then report the closed circuit time to the tenth of an hour. The input will accumulate and report in tenths of hours up to a total accumulated running time of 99,999.9 hours. The initial value of the Run Time Meter shall be programmable in order to agree with existing electromechanical Run Time Meters. Up to a total of 8 Run Time Meters may be programmed. • H. Any dry contact input can be programmed to accumulate the number of pulses (momentary contact closures) occurring at the input. I. Upon initiating an alarm phone call, the system is to "speak" only those channels that are currently in "alarm status." J. The unit shall provide a complete verbal report of all programmable functions and their programmed values on command form from any remote touch tone phone. K. The unit shall be capable of dialing any phone number on command and function as a speakerphone. L. Inquiry phone calls can be made directly to the unit at any time from any telephone, locally or long distance, for a complete status report of all variables being monitored; including power status. 6x6 Above Ground Specifications Revised: 10-1-97 28 PS -00485 CSI Format • • M. Normal power shall be 105-135 VAC, 15 watts nominal. The product 411 is to contain its own gel cell rechargeable battery which is automatically kept charged when AC power is present. The system shall operate on battery power for a minimum of 20 continuous hours in the event of AC power failure. A shorter backup time shall not be acceptable. The built-in charger shall be precision voltage controlled, not a "trickle charger", in order to minimize recharge time and maximize battery life available. N. The dialer is to use a standard rotary pulse or touch tone "dial- up" phone line (direct leased line not to be required) and is to be F.C.C. approved. Connection to the telephone is through a 4 - pin modular jack (RJ -11.) O. All power, phone line, dry contact, and analog signal inputs shall be protected at the circuit board to IEEE Standard 587, Category B (6,000 volts open circuit/3,000 amps closed circuit.) Gas tubes followed by solid state protectors shall be integral to the circuit board for each such line. Protectors mounted external to the main circuit board shall not be an acceptable substitute. The installer shall provide a good electrical ground connection point near the unit to maximize the effectiveness of the surge protection. P. The dialer shall be supplied and under warranty by the lift station manufacturer covered by a three (3) year warranty covering ry parts and labor performed at the factory. • Q. The system shall include expansion connectors to accommodate field upgrades for additional dry contact inputs, remote supervisory control outputs, analog inputs and communication with remote printers and computers. R. All keyboard and front panel switches shall be sealed to prevent contamination. Front panel LED's shall indicate: Normal Operation, Program Mode, Phone Call in Progress, Status for each channel, AC Power Present, AC Power Failure, and Discharging or Recharging Battery. On any inquiry telephone call or on site status check, the voice shall provide specific warning if no dial out phone numbers are entered, or if the unit is in the "alarm disable" mode, or if AC power is off or has been off since last reset. A built-in microphone shall allow anyone at a remote phone to listen to local sounds and have a two-way conversation with personnel at the dialer. • 6x6 Above Ground Specifications Revised: 10-1-97 29 PS -00485 CSI Format • • NOTICE The following section provides specifications for an optional LIQUID LEVEL. CONTROL SYSTEM which may be added in lieu of the standard EPS Air Bubbler type. * (Optional Accessory for MERCURY FLOAT SWITCH TYPE CONTROL) Add the following section and delete LIQUID LEVEL CONTROL (Air Bubbler Type) /3.7. LIQUID LEVEL CONTROL (Mercury Float Switch Type) 1. The level control system shall start and stop pump motors in response to changes in wet well level. It shall be the mercury float switch type with floats to be secured to a vertical pipe in the wet well. Rising and falling liquid level in the wet well causes switches within the floats to open and close, providing start and stop signals to the remainder of the level control system. 2. The level control system shall start and stop the pumps in accordance to the wet well level. Upon operator selection of automatic operation, a float switch shall start one pump motor when water rises to the "lead pump start level". When the water is lowered to the "lead pump stop level", the system shall stop this pump. These actions shall constitute one pumping cycle. Should the water continue to rise, an additional float switch will start the second pump after reaching the "lag pump start level" so that botY pumps operate together. Both pumps shall stop at the same "all pumps off level". Circuit design in which application of power to the lag pump motor starter is contingent upon completion of the lead pump circuit shall not be acceptable. 3. The level control system shall work in conjunction with an alternator relay to select first one pump, then the second pump, to run as "Lead" pump. Alternation will occur at the end of each pumping cycle. 4. Float switches shall be supplied for installation by the contractor. Each float shall contain a mercury switch sealed in a polypropylene housing, with 20 feet of power cord, and polypropylene mounting hardware.A PVC or stainless steel mounting pipe shall be furnished by the contractor to secure the switches in the wet well. 5. A junction box shall be supplied for installation in the wet well by the contractor. Junction box shall be NEMA 4X, non -corrosive type incorporating terminal blocks match -marked to terminals in the control panel. 6. A separate float switch shall be used to alert maintenance personnel to a high water level in the wet well (Low level float y�5 switch is optional). Should the water level rise to the "hig water alarm" level, the float switch shall energize a 115 -volt A. circuit for an Cexternal alarm device) An indicator, visible from front of control panel, shall incate high level condition 6x6 Above Ground Specifications PS -00485 Revised: 10-1-97 30 CSI Format a N • • • • exists. The alarm signal shall maintain until wet well level is lowered and alarm circuit manually reset. 7. An alarm silence switch shall provide maintenance personnel a means to de -energize the external alarm device while corrective No actions are under way. After silencing the alarm, manual reset of the alarm signal shall provide automatic reset of the alarm silence relay. 6x6 Above Ground Specifications Revised: 10-1-97 31 PS -00485 CSI Format • • NOTICE The following section provides specifications for an optional LIQUID LEVEL. CONTROL SYSTEM which may be added in lieu of the standard EPS Air Bubbler type. * (Optional Accessory CONTROL) Add the following se Type) 03.8. LIQUID LEVEL CONTROL (Intrinsically Safe Mercury Float Switch for INTRINSICALLY SAFE MERCURY FLOAT SWITCH TYPE ction and delete LIQUID LEVEL CONTROL (Air Bubbler Type) 1. The level control system shall start and stop pump motors in response to changes in wet well level. It shall be the mercury float switch type, incorporating -intrinsically safe relays. Floats to be secured to a vertical pipe in the wet well. Rising and falling liquid level in the wet well causes switches within the floats to open and close, providing start and stop signals to the remainder of the level control system. 2 The level control system shall start and stop the pumps in accordance to the wet well level. Upon operator selection of automatic operation, a float switch shall start one pump motor when water rises to the "lead pump start level". When the water is lowered to the "lead pump stop level", the system shall stop this pump. These actions shall constitute one pumping cycle. Should the water level continue to rise, an additional float switch will start the second pump after reaching the "lag pump start level" so that both pumps operate together. Both pumps shall stop at the same "all pumps off level". Circuit design in which application of power to the lag pump motor starter is contingent upon completion of the lead pump circuit shall not be acceptable. 3 The "level control system shall work in conjunction with an alternator relay to select first one pump, then the second pump, to run as "Lead" pump. Alternation will occur at the end of each pumping cycle. 4 Float switches shall be supplied for installation by the contractor. Each float shall contain a mercury switch sealed in a polypropylene housing, with 20 feet of power cord, and polypropylene mounting hardware. A PVC or stainless steel mounting pipe shall be furnished by the contractor to secure the switches in the wet well. 5 A junction box shall be supplied for installation in the wet well by the contractor. Junction box shall be NEMA 4X, non -corrosive type incorporating terminal blocks match -marked to terminals in the control panel. 6 Intrinsically safe relays shall be supplied in a separate level• control enclosure. Relays must be recognized and listed as intrinsically safe by a notionally recognized testing laboratory. 6x6 Above Ground Specifications PS -00485 Revised: 10-1-97 32 CSI Format • • • • Station manufacturer shall make all connections from relays to feeder lines and motor controls. Installing contractor shall make connections from relays to float switch junction box. 7. A separate float switch, and intrinsically safe relay shall be used to alert maintenance personnel to a high water level in the wet well (Low level float switch is optional). Should the wet well level rise to the "high water alarm" level, the float switch and intrinsically safe relay shallenergize the alarm signal. The alarm signal shall complete a 115 -volt AC circuit for an external alarm device. An indicator, visible from front of control panel, shall indicate high level condition exists. The alarm signal shall be maintained until wet well level is lowered and alarm circuit manually reset. 8. An alarm silence switch shall provide maintenance personnel a means to de -energize the external alarm device while corrective actions are under way. After silencing the alarm, manual reset of the alarm signal shall provide automatic reset of the alarm silence relay. 6x6 Above Ground Specifications Revised: 10-1-97 33 PS -00485 CSI Format • • NOTICE The following section provides specifications for an optional LIQUID LEVEL CONTROL SYSTEM which may be added to the specification in lieu of the standard EPS Air Bubbler type. * (Optional Accessory for EPS with SUBMERSIBLE TRANSDUCER) Add the following section and delete LIQUID LEVEL CONTROL (Air Bubbler Type) WO 3.9. LIQUID LEVEL CONTROL (EPS with SUBMERSIBLE TRANSDUCER) 1. The level control system shall start and stop pump motors in response to changes in wet well level. It shall be a submersible transducer type, with a pressure sensor which extends into the wet well. The pressure transducer provides a proportional level signal to the electronic pressure switch and remainder of the level control system. 2. The electronic pressure switch shall continuously monitor the wet well level, permitting the operator to read the water level at any time. Upon operator selection of automatic operation, the electronic pressure switch shall start motor for one pump when liquid level rises to the "lead pump start level". When the liquid is lowered to the "lead pump stop level", the electronic pressure switch shall stop this pump. These actions shall constitute one pumping cycle. Should the wet well level continue to rise, electronic pressure switch will start the second pump when the liquid reaches the "lag pump start level" so that both pumps operate together. These levels shall be easily adjustable using set point trim pots. 3. The level control system shall work in conjunction with an alternator relay to select first one pump, then the second pump, to run as "Lead" pump. Alternation will occur at the end of each pumping cycle. 4. Electronic Pressure Switch a. Electronic pressure switch shall contain all integral components to perform pressure sensing, signal conditioning, EMI and RFI suppression, DC power supply and 120 volt outputs. Comparators shall be solid state, and integrated with other components to perform functions described below. b. Electronic pressure switch shall operate on supply voltage of 108 VAC to 132 VAC, 60 Hertz, in an ambient temperature range of -18°C (0°F) through +55°C (131°F) . Control range shall be 0 to 12.0 feet of water with an overall repeat accuracy of (plus/minus) 0.1 feet of water. c. Electronic pressure switch shall consist of the following integral components: Pressure sensor, display, electronic comparators and output relays. 1) Pressure sensor: a strain gauge transducer designed to bee submerged in the wet well. The sensor converts the input to a proportional electrical signal for distribution to the display 6x6 Above Ground Specifications Revised: 10-1-97 34 PS -00485 CSI Format • N • • • and electronic comparators. Sensor range shall be 0-12 ft. W.C. min. with an over -pressure rating 3 times full scale. The pressure sensor shall be equipped with 26 feet of cable. 2) Digital panel meter: upon operator selection, displays liquid level in the wet well, and the preset start and stop levels for both lead and lag pump. The meter is be a 3-1/2" digit display calibrated to read out directly in feet of water, accurate to within one-tenth foot (0.1 foot), with full scale indication of not less than 12 feet. 3) Electronic comparator: adjustable setpoints to control levels at which lead and lag pumps start and stop. Each of level setting is adjustable, and accessible to the operator without opening the electronic pressure switch or any cover panel on the electronic pressure switch. Comparators allow the operator to read selected levels on the display. Adjustments shall not require hard wiring, use of electronic test equipment, artificial level simulation or introduction of pressure to the electronic pressure switch. 4) Output relays: individual solid state relay provided each output function. Relay input to be optically isolated from its output incorporating zero crossover switching to provide high immunity to electrical noise. The "ON" state of each relay shall be indicated by illumination of a light emitting diode. The output of each relay to be individually fused providing overload and short circuit protection. Each output relay has inductive load rating equivalent to one NEMA size 4 contactor. A pilot relay shall be used for loads greater than a size 4 contactor. d. Each electronic pressure switch shall be subjected to severe environmental tests to minimize field failures. Tests shall include, but is not limited to vibration test, exposure to elevated temperatures, and burn -in under load. Further testing may be conducted at the manufacturer's discretion. e. Electronic pressure switch to be equipped with replaceable plug-in integrated circuits, output relays and fuses. The main circuit board assembly shall be provided with keyed plug-in connections to "off -board" components permitting main board removal without de -soldering. All printed circuits protected by a conformal coating applied to both sides to resist moisture or fungus. f. Circuit design in which application of power to the lag pump motor starter is contingent upon completion of the lead pump circuit shall not be acceptable. g. Electronic pressure switch shall utilize an electronic comparator and solid state output relay to alert maintenance personnel to a high water level in the wet well (Low level alarm is optional). If liquid reaches the preset alarm level, the output relay energizes an alarm signal, completing a 115 VAC circuit for external alarm device. An indicator, visible from front of control panel, shall indicate high level condition exists. The alarm signal shall be maintained until wet well level is lowered and alarm circuit manually reset. h. An alarm silence switch shall provide maintenance personnel a means to de -energize the external alarm device while corrective actions are under way. After silencing the alarm, manual reset 6x6 Above Ground Specifications Revised: 10-1-97 35 PS -00485 CSI Format • • of the alarm signal shall provide automatic reset of the alarm silence relay. * (Optional Accessory for Intrinsically Safe Barrier when used with submersible transducer) Intrinsically Safe Barrier 1. An intrinsically safe repeater shall be supplied in the control enclosure. Repeater must be recognized and listed as intrinsically safe by a notionally recognized testing laboratory. Station manufacturer shall make all connections from repeater to feeder lines and motor controls. Installing contractor shall make connections from repeater to transducer. * (Consult Factory for STATION MANAGEMENT SYSTEM ( SMS ) LIQUID LEVEL CONTROL specification) 6x6 Above Ground Specifications Revised: 10-1-97 36 PS -00485 CSI Format • • • Series 400 Batch Dosing Odor Control System Specification U.S. Patent #5,312,594 Section 11 PART 1 GENERAL 1.1 SCOPE OF WORK 1.1.1 This section covers the work necessary to furnish and install a complete on - demand, automatically controlled batch dosing system. The patented Series 400 System is designed to be used for odor control during the collection and holding times of a lift station wet well pumping cycle. The system shall be capable of controlling the ambient HzS as well as the organic odors associated with the wet well and force main operations. 1.1.2 The system shall have sufficient capacity to provide a supply of chemical for treatment of wastewater flows up to 50,000 gpd. It shall be used to provide odor control through line addition of POND X®2 Odor Eliminator or other suitable product. 1.1.3 The system shall be entirely self contained in two commonly mounted non-metallic corrosion resistant enclosures, consisting of a NEMA 4X control panel and a feed pump enclosure. 1.2 RELAi hll WORK 1.2.1 Contractor shall include all costs for revisions to piping, structural and other portions of the work which may be required to adapt the layout and detail shown to the system as furnished. L3 DESCRIPTION OF SYSTEM 1.3.1 The Batch Dosing Odor Control System shall be a Series 400, as manufactured by NuTech Environmental Corp_ The system is designed to batch feed Pond -X®2 Odor Eliminator or other suitable chemical to the receiving area of the lift station wet well. 1.3.2 Chemical is batch dosed after each pump out cycle of the wet well. The odor control chemical is mixed and remains active as additional waste water is received until the next pump out cycle is initiated. 1.3.3 All components required for the proper operation of the system shall be provided by the manufacturer, whether or not specifically noted in these documents, to form a complete workable system when external connections for supply wiring and chemical connections are completed. 1.3.4 The Series 400 System shall be constructed of pre -assembled integrated components. It shall be factory tested prior to shipment. 1.4 QUALIFICATIONS 1.4.1 The equipment under this section shall be furnished by a single manufacturer who is engaged in the production of such equipment and has at least five (5) years of experience in manufacturing equipment of similar design and scope. 1.4.2 If required by the engineer. the manufacturer shall provide satisfactory evidence of a minimum of two (2) installations using similar chemicals which have been operational for at least one (1) year, including the address and telephone number of the operator at each installation. 1.4.3 The patented odor control equipment specified is intended to be used as a standard of quality. Submittals and references for alternates shall be in accordance with the requirements stated herein. This data shall be submitted to the engineer 21 days prior to the bid date. Alternate system submittals shall be reviewed by the engineer for technical content and industry experience. Acceptable alternate designs shall be identified by addendum. If not so identified, they shall not be permitted. 1.4.4 The contractor, operating in cooperation with NuTech Environmental Corp. or their authorized representative, shall have sole responsibility for the proper functioning of the system furnished. L5 SUBMITTALS 1.5.1 3 copies of all documents required to establish compliance with the specifications shall be submitted in accordance with Division 1. Submittals shall include at least the following: 1.5.1.1 A complete parts listing. 1.5.1.2 Drawings showing the general dimensions of the equipment. - 1.5.1.3 Electrical ladder diagram. 1.5.1.4 Descriptive literature, bulletins, and/or catalogs of the equipment. 1.5.1.5 Data sheet for the electrical relay. 1.5.1.6 Data sheet for the timer. 1.5.1.7 Data sheet for the chemical feed pump with rated capacity and electrical requirements. 1.5.1.8 A list of the manufacturer's recommended spare parts. 1.5.1.9 Chemical product literature including Material Safety Data Sheets(MSDS). 1.5.2 If compliance with certain details of the specifications is impossible because of manufacturing or supplier changes, describe completely all non conforming issues. 1.6 MANUFACTURERS SERVICE AND O&M MANUALS 1.6.1 The manufacturer shall provide a factory representative for up to 2. day(s), on site, to instruct the owner's personnel in the proper operation and maintenance of the equipment. This may be done in connection with the required work under Part 3, as acceptable by the engineer. 1.6.2 A standard NuTech Installation, Operation, and Maintenance Manual consists of a compilation of NuTech and supplier product information. As an option, a custom Installation, Operation, and Maintenance Manual written specifically for site requirements can be composed. 1.6.3 3 copies of the standard installation, operation and maintenance manuals shall be furnished for the equipment specified herein as provided in Division 1, GENERAL REQUIREMENTS. 1.6.4 3 copies of the custom installation, operation and maintenance manuals shall be furnished for the equipment specified herein as provided in Division 1, GENERAL REQUIREMENTS. PART 2 PRODUCTS NuTech Environmental Corp. Series 400 Specification 10/00 Page 2 • • =.1 PRODUCT LISTL\G • 2.1.1 Series 400 Batch Dosing Odor Control System • • Qty Description 2.1.1.1 1 Electrical control panel consisting of: 2.1.1.1.1 1 Non-metallic NEMA 4X, lockable enclosure 2.1 .1.1.2 1 OffiOn switch 2.1.1.1.3 1 System On light 2.1.1.1.4 1 Pump Run light 2.1, 1.1.5 I Lsoiation relay 2.1.1.1.6 1 Momentary contact switch, Pump Prime 2.1.1.1.7 1 Multi -function timer 2.1.1.2 1 Chemical feed pump enclosure consisting of: 2.1.1.2.1 1 Non-metallic, lockable enclosure 2.1.1.2.2 1 Chemical feed pump 2.1.1.2.3 1 Combination foot valve and suction screen 2.1.1.2.4 1 Injection check valve 2.1.1.2.5 16' Chemical siphon tubing, polyethylene 2.1.1.3 1 Aluminum back plate for both enclosures 2.1.1.4 1 Siphon tube straightener, 55 gallon drum 2.1.2. Required Supplemental Equipment 2.1.2.1 Zo ft. Chemical tubing, polyethylene 2.1.3. Recommended Spare Parts 2.1.3.1 2.1.3.2 Pump liquid end repair kit Pump infection check valve 2.1.4. Initial Chemical Supply 2PoAir S 2.1.4.1 _ gals Pond -X"2 Odor Eliminator MATERLALS AND EQL [PNIENT - GENERAL 2.2.11 The following specifications are intended to give a general description of what is to be supplied with the chemical batch dosing system. They don't cover any additional materials and equipment which may vary with the installation and operation requirements of the specific job location. Additional equipment necessary for the proper operation of the system not specifically mentioned in these specifications andfor shown on the drawings shall be furnished and installed by the contractor. 2.3 CONTROL PANEL 2.3.1 The system shall be supplied with a non-metallic, lockable, corrosion resistant NEMA 4X control panel enclosure. The enclosure shall contain an On/Off control switch and pilot light and all of the associated electronics for the control of the system. It shall include a multi -functional timer with that can b2 adjusted to a timing range of 1 second to 10 minutes. Also required is a DPDT relay for controlling the chemical feed pump. The relays shall have a plug in base for ease of service. 2.3.2 Initialization of the system shall be with a dry contact closure when a wet well pump out cycle is completed. Typically, this shall be a normally closed auxiliary switch on the wet well pump starter. 2.4 PUMP ENCLOSURE N...iTccn Environmental Corp. Series 400 Specification 10/00 Page G The chemical feed pump shall be housed in a non-metallic. lockable enclosure. It shall have a single SO cord connecting the pump to the control panel. CHEMICAL FEED PUMP 2.5.1 The chemical solution shall be delivered with a solenoid operated, diaphragm feed pump containing a con-osion resistant polypropylene liquid end and glass fiber reinforced housing. The pumping capacity shall be sufficient for the flow to be treated. The pump shall have both stroke length and stroke frequency (speed) adjustment for a 100.1 turndown ratio. The pump diaphragm shall be Teflon coated and the check valve assembly shall contain Teflon seats with • ceramic balls. The pump head, foot valve, and infection check valve shall contain no 0 -ring seals. 2.6 ALUMINUM BACK PLATE 2.6.1 An aluminum back plate shall be supplied that can be utilized for wail mounting. It shall be shipped pre -assembled with the control panel and pump enclosure. The overall size shall he 40" high x 20" wide. 2.7 SIPHON TUBE STR.AIGHTENER/CHEMICAL CONCEN PRATE STORAGE TANK 1 A polypropylene suction tube straightener for a 55 gallon dnim shall be provided to form a vapor seal on the chemical concentrate drum and keen the cnemicai suction tube properly positioned at the bottom of the drum. The odor control chemical shipping drum shall be used as the concentrate storage tank. 2.8 CHEMICAL TUBING 2.8.1 The chemical shall be delivered to the application point via polyethylene tubing rated for 150 psi @ 700 F. In outdoor applications or where the tubing is exposed to sunlight. black UV -resistant tubing shall be specified. 2.5.2 If required. 1-1!4" PVC conduit with lone radius sweeps shall be provided by the contractor to run tubing from the feed system to the application point. 2.9 CHEMICAL 2.9.1 There shall be provided an estimated 2 month supply of the chemical specified below 2.9.1.1 There shall be provided for odor control purposes POND X®2 Odor Eliminator, a liquid formulation capable of chemically :teutralizing the malodors commonly associated with anaerobic and aerobic waste retention facilities. The chemical shall consist of a variety of metal salts which permanently bind and precipitate the compounds responsible for odor generation. The product chemically neutralizes. rather Than simply disguise. the HSS, amine, mercaptan, and disulfide odors Most commonly associated with wet wells, lagoons. waste pits, and ponds. The chemical must aid in the reduction of the BOD. TKN and solids by increasing the normal biological activity which results in more efficient solids digestion. 2.10 L TTLITIES 2.10.1 A 1.5 Amp. 120V, 60 Hz power .supply shall be required for the system. PART 3 EXECUTION 3.1 L\ STALLATION 3.1.1 Installation instructions shall be included as part of the Installation Operation and Maintenance manual. 3.2 HELD LD LNSPECTION AND TES 1'ING NuTech Environmental Corp. Series 400 Specification 10100 Page 4 3.2.1 After the installation of the interconnecting piping. and wiring are completed by the contractor, inspection of the final installation. start-up, calibration, and instruction of the operating personnel shall be performed by the manufacturers representative. NuTech Environmental Corp. Series 400 Specification 10/00 Page 5.