===== PDF PAGE 23 ===== [Extraction: embedded PDF text] CITY OF WEST CHICAGO INFRASTRUCTURE COMMITTEE AGENDA ITEM SUMMARY ITEM TITLE: AGENDA ITEM NUMBER: _':f~e_·p_· _,__ Resolution No. 20-R-0007 - Layne Christensen Company - Approval of Contract for Professional Services Related to COMMITTEE AGENDA DATE: February 6, 2020 the Rehabilitation of the Pump and Motor Assembly COUNCIL AGENDA DATE: February 17, 2020 Associated with the City's Well Station No. 8 //_/'_./~ STAFF REVIEW: Robert E. Flatter, P.E., Director of Public Works SIGNATURij"~~4'.~~/'~·=c =====--- Rocky Horvath, Utility Superintendent APPROVED BY CITY ADMINISTRATOR: Michael L. Guttman SIGNATURE _________ _ ITEM SUMMARY: The current pump and motor assembly associated with Well Station No. 8, located at 1255 Helena Drive, is a Bryon Jackson assembly installed in March of 1988. The Byron Jackson well pump operates at a depth of approximately 343' below ground and is rated to pump approximately 700 gallons per minute (gpm). The 40 HP Byron Jackson Type H submersible motor has a mercury seal versus a mechanical seal. In summer 2019 a decrease was observed in the pump's performance and the well was placed out of service in November 2019 when its performance averaged less than 100 gallons per minute. Byron Jackson assemblies are generally known to last approximately ten (10) to fifteen (15) years before needing inspection and services/rehabilitation. Well Station No. B's was last serviced in 2005. Due to its history of being a factory-authorized sales and service representative for Byron Jackson pumps and motors (including those containing mercury seals), and its history of servicing the City's Byron Jackson well assemblies, staff solicited a proposal from Layne Christensen Company (Layne) of Aurora, Illinois, to pull and rehabilitate the well assembly at Well Station No. 8 (see attached proposal). Layne's proposal includes a complete rebuild and rehabilitation of the existing well equipment including a television survey of the well casing. The estimated total for these services is $68, 140.00. One additional item addressed in Layne's proposal is replacement of the well motor, if needed. The existing motor has a mercury seal system that needs to be inspected before reinstallation. If inspection determines the mercury seal has failed and cannot be reused, a factory exchange replacement motor has been quoted at a net cost of $59,770.00. For a total project cost estimated at $127,910.00. Since the well is currently inoperable, City staff recommends the rehabilitation of the well assembly associated with Well Station No. 8 before the start of the peak summer water system demand. Therefore, staff recommends that a professional services contract be awarded to Layne Christensen Company of Aurora, Illinois, related to the rehabilitation of the pump and motor assembly at the City's Well Station No. 8, for an amount not to exceed $128,000.00. ACTIONS PROPOSED: Approve Resolution No. 20-R-0007 authorizing the Mayor to execute a contract with Layne Christensen Company for professional services related to the rehabilitation of the pump and motor assembly at the City's Well Station No. 8 for an amount not to exceed $128,000.00. COMMITTEE RECOMMENDATION: ===== PDF PAGE 24 ===== [Extraction: embedded PDF text] RESOLUTION NO. 20-R-0007 A RESOLUTION AUTHORIZING THE MAYOR TO EXECUTE A CONTRACT AGREEMENT WITH LAYNE CHRISTENSEN COMPANY FOR PROFESSIONAL SERVICES RELATED TO THE REHABILITATION OF THE PUMP AND MOTOR ASSEMBLY ASSOCIATED WITH THE CITY'S WELL STATION NO. 8 BE IT RESOLVED by the City Council of the City of West Chicago, in regular session assembled, that the Mayor is hereby authorized to execute a Contract Agreement for Professional Services related to the rehabilitation of the pump and motor assembly associated with the City's Well Station No. 8, between the City of West Chicago and Layne Christensen Company, for an amount not to exceed $128,000.00, in substantially the form attached hereto and incorporated herein as Exhibit "A". APPROVED this 17th day of February 2020. AYES: NAYES: ABSTAIN: ABSENT: Mayor ATTEST: City Clerk ===== PDF PAGE 25 ===== [Extraction: embedded PDF text] Layne Christensen 721 W. Illinois Ave. Aurora, IL 60506 A GRAr1ITE' COMPANY T 630.897.6941 granltenstruction.com December9,2019,2019 City of West Chicago ATTN: Mr. Rocky Horvath P.O. Box 488 475 W. Main Street West Chicago, IL 60185 RE: Shallow Well No. 8 Byron Jackson Pump No. 881-C-0416 Rocky: We are pleased to submit our proposal for the pulling and inspection of the 40 HP Byron Jackson Type H submersible pump installed in your Well No. 8, along with some of the possible repairs and pump design modifications. The Well No. 8 pump has not been pulled for repairs since 2005. A pump repair of this type is normally performed on a time and material basis with charges for labor and equipment per the attached Work Order Form. We would utilize a Small Pump Service Rig and crew. Our time estimates for labor are based on being able to pull the pump in a normal fashion. Once the pump has been pulled and inspected, we can provide updated repair cost estimates before proceeding with any additional work. From our prior emails and discussions, you also are considering a pump design modification, so that the pump will produce a higher flow rate. You stated that the Well 8 pump will produce 300 GPM with no other wells pumping to the plant, but less than 100 GPM with the other wells running. It would seem that the 700 GPM @ 135' pump design needs an upgrade. Using the 40psi discharge pressure you've seen, and adding an estimated 100' pumping level, the modified design would be 700GPM@ 192' total head. By adding one (1) additional Byron Jackson 11 MOL stage to the existing three (3) stage bowl, we can increase the total head by approximately 50', which would change the design to 700GPM@ 185' total head .. .... or very close to desired. As stated in our July 24 email, you might want to run this design past your consulting engineer, to ensure we've included all necessary factors in our calculations. The new design increases the motor horsepower to approximately 47 HP. Since the 40 HP Byron Jackson Type H motor is actually a 50 HP motor, you would be fine with reusing the existing motor. In addition to the bowl assembly rebuilding in our estimated pricing, there would be the cost of the additional 11 MOL bowl stage, complete w/ an impeller. At this time, we have in our Aurora, IL stock, good, used all bronze 11 MOL bowl components to offer the City, which would be as good, or better, then the existing City bronze bowl components; plus, this affords the City a significant savings in cost and delivery time vs. new parts. WATER RESOURCES 721 W. Illinois Avenue; Aurora, IL 60506 I Office: 630-897-6941 I Fax: 630-897-6976 I layne.com ===== PDF PAGE 26 ===== [Extraction: embedded PDF text] Our estimate for the pulling, inspection, possible repairs & new materials and recommended well television survey, is: • Small Pump Service Rig and 3 Man Crew - Set up, pull, and haul pump to our Aurora, IL yard (Est. 2-1/2 to 3 days} $13,500.00 • Television survey of well, lump sum $1 ,675.00 • Sandblast 8" T&C pipe & bowl for inspection, EST. 6 hrs. @ $2,286.00 $381/hr. • Disassemble & inspect all bronze bowl, EST 6 hrs.(@ $190/hr. $1 , 140.00 • Complete, routine servicing of the Byron Jackson Type H motor. $2,875.00 • Rebuild the 3 stage - 11 MQL Byron Jackson a// bronze bowl $4,875.00 assembly • New 8" T&C prime steel line pipe est. 100' av $54.00/ft. $5 400.00 • Epoxy coatinQ of pipe, in & out, 276ft. (@ $28.00/ft. $7,728.00 • Small Pump Service Rig & 3 Man Crew - Load & remobilize to site; prep BJ motor; reinstall & test pump, & demob (Est. 3 to 3-1/2 days) $16,500.00 • New Byron Jackson Flat cable, if needed $6,531.00 • One (1) good, used Byron Jackson 11 MQL all bronze bowl stage $4,880.00 • Miscellaneous Materials $750.00 TOTAL ESTIMATED COST $68,140.00 If there is an issue with the existing 40HP motor, we would have to ship it back to the Flowserve/Byron Jackson factory for inspection. The worst-case scenario would be the need for a factory exchange, replacement motor; in which case, the City's motor would be traded in and a credit would be applied to the City replacement motor cost. IF NEEDED, this would be an additional, net cost of $59,770.00 to the City. We must also remind you and the City that the 40 HP Byron Jackson Type H submersible motor is equipped with the very successful and unique mercury seal. Our work would include utilization of a Byron Jackson factory-authorized serviceman to complete the several-step procedure at the well site to properly service the motor. The mercury motor seal should be balanced, along with the seal and motor can dewatered in accordance with our exclusive procedure. This will allow the motor to be put in a proper shipping position with the mercury seal secured and will minimize the potential for water entering the windings, which would result in damage to the motor. This servicing would be done outside the well by utilizing a sealed motor service containment module that is transported to the project site to meet the July 1, 2012 IEPA guidelines. To our knowledge, Layne is the only contractor in the country that is currently utilizing this equipment, and of course, only Layne employs factory-certified servicemen. We appreciate the opportunity to submit this proposal and hopefully it meets your favorable response. If you have any questions, please don't hesitate to contact us. Yours very truly, qAom