===== PDF PAGE 25 ===== [Extraction: embedded PDF text] CITY OF WEST CHICAGO INFRASTRUCTURE COMMITTEE AGENDA ITEM SUMMARY ITEM TITLE: AGENDA ITEM NUMBER: ------Lt• ·p • Resolution No. 21-R-0086 - Contract Award - Layne Christensen Company for Professional Services Related to COMMITTEE AGENDA DATE: October 7, 2021 the 2021 Well Station No. 7 Rehabilitation Project COUNCIL AGENDA DATE: October 18, 2021 STAFF REVIEW: Mehul Patel, P.E., CFM, Director of Public Works SIGNATURE__,~'--'--;._:b:'_~:_~:_:_-::.::.-::::.........,,_-=--- APPROVED BY CITY ADMINISTRATOR: Michael L. Guttman SIGNATURE _________ _ ITEM SUMMARY: Well Station No. 7, located at 627 W Hawthorne Lane, is one of four City-owned shallow wells with a Byron Jackson well pump and motor assembly set at a depth of approximately 250 feet and rated to pump 720 gallons per minute. The well was originally constructed in 1982 and was last serviced in 2006. The service at that time included replacement of the motor assembly and all column pipe. Starting in 2015, Well No. 7 began to exhibit a decline in capacity (gallons per minute). As of August 2021, the well capacity was down to 621 gallons per minute. This reduced capacity is indicative of overall problems with the well assembly. It is believed that a hole has developed in the column pipe of the well. If left unchecked, the motor will likely experience complete failure or, in the worst case, the column pipe may separate and drop the well pump and motor to the bottom of the casing. A casing is the pipe structure that is placed in the hole drilled in the earth to maintain the well opening. The well assembly is due for inspection and service. Due to its history servicing the well and original equipment installation, staff solicited a proposal from the Layne Christensen Company to pull, inspect, and rehabilitate the well assembly. Layne's proposal includes a complete rebuild and rehabilitation of the existing well equipment, including a television survey of the well casing. This proposal also contains estimated provisions for new column pipe, cable, cleaning and re-coating of the existing column pipe, and overall inspection of all well components. The estimated total for these services is $89,657.00. One additional item addressed in this proposal is replacement of the well motor, if needed. The existing motor has a mercury seal system, which needs to be inspected before reinstallation. If inspection determines the unit cannot be reused, a new motor has been quoted at $63,989.00, for a total worst-case scenario project cost of $153,646.00. At this time staff does not foresee a need to replace the motor. Following service, the well assembly will be re-installed, tested, and returned to service. City staff recommends the rehabilitation of the well assembly before the start of our proposed 2022 Booster Station Rehabilitation Projects. To accomplish this, staff recommends that the City Council authorize the Mayor to execute a contract with Layne Christensen Company, for an amount not to exceed $153,646.00, for services necessary to remove, inspect, repair, re-install, test and place the well assembly at Well Station No. 7 back into operation. There is $200,000.00 budgeted in the Water Fund (06-34-47-4420) for pump station repairs, which is adequate to rehabilitate Well Station No.7, including the replacement of the motor, if needed. ===== PDF PAGE 26 ===== [Extraction: embedded PDF text] CITY OF WEST CHICAGO ACTIONS PROPOSED: Approve Resolution No. 21-R-0086 authorizing the Mayor to execute a contract with the Layne Christensen Company, for an amount not to exceed $153,646.00 for professional services related to the 2021 Well Station No. 7 Rehabilitation Project. COMMITTEE RECOMMENDATION: ===== PDF PAGE 27 ===== [Extraction: embedded PDF text] RESOLUTION NO. 21-R-0086 A RESOLUTION AUTHORIZING THE MAYOR TO EXECUTE A CONTRACT AGREEMENT WITH LAYNE CHRISTENSEN COMPANY FOR PROFESSIONAL SERVICES RELATED TO THE 2021 WELL STATION NO. 7 REHABILITATION PROJECT 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 2021 Well Station No. 7 Rehabilitation Project, between the City of West Chicago and Layne Christensen Company, for an amount not to exceed $153,646.00, in substantially the form attached hereto and incorporated herein as Exhibit "A". APPROVED this 18th day of October, 2021. AYES: NAYES: ABSTAIN: ABSENT: Mayor Ruben Pineda ATTEST: City Clerk Nancy M. Smith ===== PDF PAGE 28 ===== [Extraction: embedded PDF text] WATER MINERAL· EN[RGY August 18, 2021 City of West Chicago 475 Main Street West Chicago, IL 60185 Attn: Rocky Horvath, Water Superintendent Re: Well No. 7 - 75HP Byron Jackson Type H Submersible pump repair Rocky, Per your request, we are sending this letter to estimate the costs for the pulling, repairs, and reinstallation of the 75HP Byron Jackson submersible pump in Well No. 7. The pulling would be done to determine the reason for the decrease in the well production, that the City has noticed. From our prior troubleshooting visit, we observed the following: • The 75 HP Type H Byron Jackson motor megged 84.4 megohms, which is typically considered a bit low (but still acceptable for a used motor), but higher than the 30 megohms when Layne repaired this pump last in 2006. • Operating into the system at 20 psi discharge pressure, the pump was producing 684 gpm with a pumping level of 168 feet (static water level = 82 feet). (After our April 2006 repair, the pump was producing 720 gpm at 30 psi with a pumping level of 205 feet.) • The shutoff head was measured at 85 psi. The above operating points plot significantly off the Byron Jackson bowl assembly pump performance curve, and with the near normal amperage draw and higher pumping level, we are suspecting a hole in the column pipe, allowing water to recirculate back into the well. Layne installed the new Byron Jackson submersible pump in 1983, as well as repairing the pump 3 times and acidizing the well twice. The last repair was in 2006, which included furnishing a factory-exchange 75HP Byron Jackson motor and all new 6" T&C pipe. The bronze bowl was rebuilt. Due to the nature of the situation, an exact cost cannot be determined until the pump has been pulled and inspected. However, for budgetary purposes, we have developed the list below, WATER RESOURCES 721 W. Illinois Avenue; Aurora, IL 60506 I Office: 630-897-6941 I Fax: 630-897-6976 I layne.com 1 ===== PDF PAGE 29 ===== [Extraction: embedded PDF text] City of West Chicago A TIN: Rocky Horvath August18, 2021 Page2 which includes all items that we believe will be required, as well as some items that may be needed on this 75HP, Type H 460-volt Byron Jackson submersible deep sandstone well pump. • Mobilization to the site, pull the pump, briefly inspect on-site and measure the total depth and static water level. • Television Survey of the well to check the integrity of the well casing and open borehole. • Disassemble, inspect & probable rebuilding of the Byron Jackson bronze bowl assembly. • Mobilize 6" column pipe to our yard; sandblasting for inspection; and remobilize back to site. • Possible 6" T&C pipe repairs and re-epoxy coating, inside and out. • Service the Byron Jackson motor - change oil, epoxy coat exterior, check the seal float, etc. • New materials contingencies. • Re installation of the pump, including a test of the well and pump. Please note that the 75HP Byron Jackson Typ~ H mercury motor seal should be balanced, and the motor dewatered in accordance with our exclusive procedure. This will allow the motor to be put in the proper shipping position with the mercury seal secured and will minimize the potential for water entering the motor windings, which would result in damage to the motor. Only Layne can provide a Byron Jackson factory authorized serviceman to complete this procedure properly. As a result of the new July 1, 2012, IEPA guidelines, we no longer conduct the seal servicing or motor dewatering over the well. To our knowledge Layne is the only contractor in the country that is currently utilizing a sealed motor service containment module that is transported to the project site to meet the new IEPA regulations. Our work will include COMPLETE adherence to these regulations. 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. With this outdoor set-up, we would utilize a medium-sized Pump Service Rig and crew of 2 Men. These rates are applicable until October 1, 2021, when we would expect a slight increase. If the City authorizes this work prior to October 1 , we will hold the current rates. 2 ===== PDF PAGE 30 ===== [Extraction: embedded PDF text] City of West Chicago AITN: Rocky Horvath August 18, 2021 Page 3 The listing of the items for our T&M estimate is broken down as follows: • Mobilization, pulling, and brief inspection on the site with pump service crew $9,500.00 • Hydro crane and crew to load and haul bowl, cable, motor, etc. to yard $1,200.00 • Disassemble, clean, & inspect all bronze bowl assembly $1,750.00 Sandblast 6" pipe for inspection $1,800.00 • • Complete servicing of 75HP Type H Byron Jackson motor, by Byron Jackson certified technician $4,800.00 • Hypot check of cable, lump sum $1, 175.00 Television survey of well, lump sum $1,600.00 • • Rebuild 7 Stage - 1OMQH Byron Jackson all bronze fitted bowl assembly, if required. $8,500.00 • Refurbish Baker pitless adapter spool $1,750.00 Miscellaneous materials, such as, sodium hypochlorite, • HTH tablets, stainless steel banding and buckles, etc. $750.00 Mobilization of bowl, cable, and motor to site and unload • $1,700.00 • Pump service crew for reinstallation of pump, testing, and demobilization $12,000.00 • Power tong usage, per 8-hour shift- est. 4 at $460.00 $1,840.00 • Byron Jackson flat cable assembly $6,280.00 • 6" T&C replacement pipe contingency, 250 ft. @ $48.00/ft. $12,000.00 New No. 1/0, 600V jacketed power cable, 260 ft.@ $5,980.00 • $23.00/ft • 1 - 1O" surge control valve(@ $1,026.00 ea . $1,026.00 3 ===== PDF PAGE 31 ===== [Extraction: embedded PDF text] City of West Chicago ATTN: Rocky Horvath August 18, 2021 Page4 • 5 - 6" API Pipe couplings@ $168.00 ea . $840.00 • Cutting & rethreading of an estimated 10 non-coupling pipe ends. $2,500.00 Mobilization of pipe, to & from :our Aurora yard, est. 8 hrs . • @ $427.00 per hour $3,416.00 Sandblasting & epoxy coating of the 6" pipe, inside & out • - 250' @ $31 /ft. $7,750.00 Miscellaneous Repairs Continqencv $1,500.00 • TOTAL ESTIMATED COST $89,657.00 We assume the pump can be pulled in a normal fashion without the need for any fishing for its removal from the well. Since the motor is currently operating satisfactorily, the above pricing schedule is based upon the 75HP motor being reusable and completely serviceable, utilizing our unique, multi-step Byron Jackson Type H motor servicing procedure. If there are issues with the motor, requiring it be sent back to Flowserve/Byron Jackson for teardown & inspection, then a Byron Jackson 75HP factory exchange, Type M motor may be required. If so, the NET price to the City would be $63,989.00, which includes the $6,850.00 credit for the City's motor and shipping costs. The estimated time frame for the factory exchange motor would be at least 10-12 weeks, after the City's Motor is inspected. Once the pump has been removed, cleaned, & inspected, Layne would provide an updated repair cost estimate BEFORE proceeding with any repairs. Of course, if we encounter something needed that is out of the ordinary, we will include that in the updated estimate. This has been standard practice on the many repairs performed for the City in the past. One possible item NOT listed in the pricing schedule is the need for any well rehabilitation. We suggest the City review the recent flow & drawdown readings to check the present specific capacity. We would surmise that well rehab will not be needed, as our troubleshooting test indicated a specific capacity higher than what we had in 2006. 4 ===== PDF PAGE 32 ===== [Extraction: embedded PDF text] City of West Chicago A TIN: Rocky Horvath August 18, 2021 Page 5 The time to execute this work, of course, depends upon what work is done. But if the motor is reusable and we can completely service it in our Aurora Service Center as part of this repair, we would estimate the following time frames: • Mobilize, pull & inspect. - 2 weeks • Repairs - 4 to 6 weeks • Reinstallation and testing - 1 week. Our current rig schedule would allow us to start this work in 2 to 3 weeks. 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, (/tlclr.a.el dfcJJon.altl qli.omtU cf. cfte""IJ. Michael McDonald Thomas P. Healy, P.E. Account Manager Sr. Project Manager Layne Christensen Company Layne Christensen Company TPH 5