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Home My WebLink AboutWWP273456 (2)r COPY a WA "&I GI R S S T S Now RH2 ENGINEERING. INC www.rh2.com mailbox@rh2.com 1.800.720.8052 BELLINGHAM 454 W Horton Rd Bellingham, WA 98226 (tel) 360.676.0836 (tax) 360.676.0837 BOTHELL 12100 NE 195th St, Ste 100 Bothell, WA 98011 (let) 425.951.5400 (fax) 425.398.2774 EAST WENATCHEE 300 Simon St SE, Ste 5 East Wenatchee, WA 98802 (tel) 509,886.2900 (fax) 509.886.2313 RICHLAND 114 Columbia Point Or, Ste C Richland, WA 99352 (let) 509.946.5181 (fax) 509.946.4630 SILVERDALE 2021 NW Myhre Rd, Ste 107 Silverdale, WA 98383 (tel) 360.698.6528 (fax) 360.698.0510 ,ACOMA One Pacific Building 621 Pacific Ave, Ste 104 Tacoma, WA 98402 (tel) 253.272.3059 (fax) 425.398.2774 December 22, 2009 Mr. Gordon Wagster Omega Contractors, Inc. P.O. Box 430 Duvall, WA 98019-0430 Sent Via.• Email and US Mail RECEjVED DEC 2 3 2009 UT �/7 j, SR EMS Subject: City of Renton Denny's Lift Station Replacement Substantial Completion of Contract and Punchlist Dear Gordy: As of December 20, 2009, all major pump station components of the Denny's Lift Station have been installed and tested. The lift station submersible pumps are now operating automatically. Therefore, RH2 Engineering, Inc. has determined that Omega Contractors, Inc. has substantially completed work on the Denny's Lift Station Replacement project in accordance with the Contract Plans. Final Acceptance of this Contract is subject to completion of the following items. 1. Complete the attached punchlist. 2. Provide final as -built and construction records. If you have any questions on the above items, please feel free to contact us. Sincerer-, RH2 ENGINEERING, INC. Mark Miller, P.E. Project Manger KSK/MM/jw/sp cc: Mr. Michael Benoit, City of Renton Attachments: Punchlist 12/2212009 2:25:12 PM ):\Data\REN\l08-056\SDC\Project Close Out\Ltr to G Wagster re Substantial Completion and Punchlist Items.docx Denny's Lift Station Replacement Mark When Complete Item Description Contractor Comments Install level transmitter and connect to the RTU Install grate and ladder in the wetwell Complete the installation of the sod Remove root ball located near the light post Install landscape paper and matching rock near the wetwell and valve vault to match existing landscaping Conduct testing of RTU alarms and statuses with Jim Swanson of RH2 Engineering Verify installation of flushing valve on both of the pumps ns a new o be provided y the City) or use rom a decommissioned City site) floats r- 12/22/20092:01 PM J:\Data\REN\108-056\SDC\Project Close Out\Punchlist.xlsx Denis Law Mayor y City Of J Public Works Department - Gregg Zimmerman P. E., Administrator October 7, 2009 �f I'VELA Denny's 4750 Lake Washington Blvd OCT t U.9 R W 9 enton A 8056 ory r;. U it.i r1' , SUBJECT: Entry Permission for Denny's Lift Station Rehabilitation Project Dear Denny's Management: The sewage lift station located in the Lake Washington Boulevard right-of-way adjaceni. to your restaurant has become increasingly less reliable. In order to maintain reliable service, the City of Renton will have a contractor do some rehabilitation and improvements on the station. The majority of the work will be performed within City right-of-way with all permanent improvements being in the right-of-way or within the existing easement on your property. Work will include tasks interior to the existing structure, excavation to install a new valve vault, and work on or around the above ground electrical panel. We are looking to start work on October 14, 2009, and are expecting to complete the K work in three to four weeks. In order to facilitate the work, the City would like to obtain permission from you to temporarily utilize a portion of your property (as shown on the attached map) during construction for the purpose of constructing the planned project improvements associated with the Denn 's Lift Station Rehabilitation project.':t The City will provide continuous access to the remaining portion of the site throughout 1 i I! Y construction. The City shall, upon completion of any work within the property covered by the agreement, restore the surface of the site, and any private improvementsiz ,;, a disturbed or destroyed during execution of the work, as nearly as practicable to the condition they were in immediately before commencement of the work or entry by the City except where modified by the project plans and specifications �d. _The City will keep the onsite property manager informed of progress and scheduling. V. - >r ,This agreement shall become effective upon execution by the property owner from date'" hereof, and shall continue in affect for three (3) months unless otherwise agreed to by both parties. fi r ='` {` Renton City Hall • 1055 South Grady Way • Renton, Washington 98057 • rentonwa gov :A _ _ ! hereby authorize the City,of Renton, or its�represeritatives, .. _n.,.� ,_._�, _. ,..._. ....._.��.. �.__..x,. �_ .�� .u� �._.__.... � . �. . R112 ENGINEERING, INC. CONSTRUCTION OBSERVATION REPORT DATE: October 30, 2009 PAGE 1 OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred CREW SIZE EQUIPMENT ON SITE (3) OMEGA (1) Excavator WORK IN PROGRESS: OMEGA was on lunch break upon arrival. DISCUSSIONS WITH CONTRACTOR: Discussed work to date and timelines with Gordy on site. Gordy indicated that they would be setting up the temporary bypass using a "Y" fitting at the existing force main. One branch would go to the temporary bypass while the other branch would be for the permanent installation. He said that they expected to be excavating for the vault on November 2°d. The vault access hatch that they are using for the lift station is larger than anticipated, so ensuring the pipe and fitting alignments and grades are crucial; therefore, they are taking additional time and care to ensure that all of the measurements are exact. The gravity sewer inlet is lower than expected. Gordy was in the process of resolving why the drop connection was so low. He indicated that he preferred to have the temporary bypass in the inside of the existing manhole but it might be on the outside due to the depth of the gravity sewer inlet. I told Gordy that I would stop by on Monday afternoon. OBSERVATIONS BY: Karla Kasick TIME AT SITE: 12:30 — 12:45 pm WEATHER: Sunny and cool TEMPERATURE: —50°F RH2 ENGINEERING, INC. CONSTRUCTION OBSERVATION REPORT DATE: November 2, 2009 PAGE 1 OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred (5) OMEGA CREW SIZE EQUIPMENT ON SITE (1) Excavator (1) Dump truck WORK IN PROGRESS: OMEGA has just begun the excavation for the vault. Two personnel were repairing the 480V line to the existing pump control panel. DISCUSSIONS WITH CONTRACTOR: Spoke to Gordy briefly on site concerning the 480V line repair. He said that while they were potholing for the outside drop connection, they found an existing PVC conduit. They traced it back for several feet and found that it was abandoned. They also found another PVC conduit nearby that they had mistakenly thought was the same abandoned conduit they had been tracing. OMEGA began to take the conduit and wire out and immediately realized that the conduit with wires went to the existing pump control panel and was active. Gordy said that they were unsuccessful in finding the outside drop connection and were approximately 5 feet below grade. Gordy felt that going any deeper was not worth it and he would install the temporary bypass inside the existing manhole. OMEGA stopped work at 3:30 for the day. Fred said that they should at the bottom of the excavation by mid- morning on November 3`d. They will be installing the crushed rock the afternoon of November 3`d OBSERVATIONS BY: Karla Kasick TIME AT SITE: 2:30 — 3:30 pm WEATHER: Cloudy, rainy and cool TEMPERATURE: —50°F .vim � \' .. •i• r ' _ 1 4 �� I � 'I. - , / `` , • 1 � � � \ � +rah - ,l 4T# }\ .� :ram - • .:..�.. R112 ENGINEERING, INC. CONSTRUCTION OBSERVATION REPORT DATE: November 3, 2009 PAGE 1 OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred (3) OMEGA CREW SIZE EQUIPMENT ON SITE (1) Excavator (1) Dump truck WORK IN PROGRESS: OMEGA was in the process of completing the excavation for the vault. The 480V line to the pump control panel had been temporarily repaired using PVC conduit and duck tape. I inspected the excavation for a firm and unyielding surface. The area closest to the existing manhole was soft and had a small amount of water. In addition, the sides of the excavation were not secure due to the sandy material of the excavation. DISCUSSIONS WITH CONTRACTOR: I discussed the soft spot with Fred on site. The soft spot is outside of the area of the vault. Fred will remove the soft material that was approximately 1 square foot. It appears that the water is coming from the manhole through the pick hole that was only grouted on the interior of the manhole. After I expressed my concern, OMEGA indicated that they would provide shoring in the excavation due to the vulnerability of the sides of the excavation. Fred pointed out that the existing force main may have a leak. Warm water is observed in the trench by OMEGA every morning. Based on the odor, I believe that there is a leak in the line. Fred said that he had notified the City of his concern. - OBSERVATIONS BY: Karla Kasick TIME AT SITE: 10:40 — 11:30 am WEATHER: Sunny and cool TEMPERATURE: —50OF t LSi�! 11�r / �' `ail •. .. t{` AIZ 41W y V 10 NL 40' doolk—. low RH2 ENGINEERING, INC. CONSTRUCTION OBSERVATION REPORT DATE: November 12, 2009 PAGE I OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred CREW SIZE EQUIPMENT ON SITE (1) OMEGA (1) Excavator WORK IN PROGRESS: OMEGA had installed two swing check valves and two plug valves in the new vault along with associated piping and appurtenances. Fred indicated they had also installed a 2-inch PVC drain from the vault to the wetwell. The tree that was located on the comer of the property has been removed. Fred indicated that City personnel requested that he remove the tree. DISCUSSIONS WITH CONTRACTOR: In discussions with Fred, he indicated that they were going to install the temporary bypass system on Tuesday, November 17`h. They were waiting for the City to complete testing on the MCC that would be completed on Monday. OMEGA will not be on site Monday. We also discussed the existing force main leak issue. Fred said that he has not seen any additional signs of leakage since they placed the crushed rock in the excavation. OBSERVATIONS BY: Karla Kasick TIME AT SITE: 10:00 — 11:00 am WEATHER: Sunny and cool TEMPERATURE: —50°F 4k, cr w I F VAW, 717 RH2 ENGINEERING, INC. CONSTRUCTION OBSERVATION REPORT DATE: December 1, 2009 PAGE 1 OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred CREW SIZE EQUIPMENT ON SITE (3) OMEGA (1) Excavator WORK IN PROGRESS: OMEGA was on site working on the wiring between the wetwell, vault and telemetry panel. Fred was installing minor appurtenances in the wetwell. The temporary pump was operational. The sump pump that OMEGA had installed was operational near the vault to keep the groundwater level low. DISCUSSIONS WITH THE CONTRACTOR: Fred and I discussed when he would be ready to install the permanent pumps. He said they were ready any time and were just waiting for it to be scheduled by Gordy. I also notified Fred that the City did not want to coat the piping in the wetwell or vault. I spoke with Gordy on the phone an hour later. The switchover from the temporary system to the permanent system will occur on Wednesday, December 2"d in the morning. OBSERVATIONS BY: Karla Kasick TIME AT SITE: 2:00 — 2:35 pm WEATHER: Sunny and cool TEMPERATURE: —450F r p x t � fi- � Y' t a �. r As, 1 • T� RH2 ENGINEERING, INC. CONSTRUCTION OBSERVATION REPORT DATE: December 3, 2009 PAGE 1 OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred CREW SIZE EQUIPMENT ON SITE (2) OMEGA (1) Excavator WORK IN PROGRESS: OMEGA was on site pulling wires from the permanent Flygt pumps to the telemetry panel. The other personnel were conducting a general clean up of the site. OMEGA has filled in the excavation as much as possible while leaving the .vye exposed for the City. DISCUSSIONS WITH THE CONTRACTOR: Hector and I discussed the operation of the pumps since their installation. He indicated that he had not wired the high level alarm to the telemetry panel but that he would complete it by the end of the day. They had pumped the wetwell down on Wednesday evening so there would be no overnight issues with high levels. Hector and I also discussed what alarms are required for the Flygt pumps. Jim Swanson from RH2 will be on site in the afternoon to work with OMEGA on alarms and statuses. I spoke with Fred on the phone concerning the coordination with the City to conduct the television inspection the next few days. He indicated that Gordy had contacted the City for the TV inspecting. OBSERVATIONS BV: Karla Kasick TIME AT SITE: 8:45 — 9:15 am WEATHER: Overcast and cold TEMPERATURE: —30°F RH2 ENGINEERING, INC. PUMP TESTING OBSERVATION REPORT DATE: December 8, 2009 PAGE 1 OF 1 CLIENT: City of Renton PROJECT: Denny's Lift Station Replacement ENGINEER: RH2 Engineering, Inc. CONTRACTOR: OMEGA FOREMAN: Fred CREW SIZE EQUIPMENT ON SITE (2) OMEGA (1) Excavator WORK IN PROGRESS: Gordy and Hector were on site with Jim Swanson, Mark Miller, Mike Benoit and Oscar Cantu to demonstrate the operation of the submersible pumps. Both pumps were operated to the satisfaction of RH2. Average flow was calculated at 305 gpm for both pumps. This flow rate is above the design flow for the station, which is 120 gpm to meet flushing velocity for the 4-inch PVC force main. Flow into the receiving manhole was observed during pump operation. Flow at the receiving manhole was laminar. The amp draw for both pumps when operating was well below the full load atnp rating for the 7.5 hp motors. Test Data: Pump 1: Pumped 34.5 inches of water or 608 gallons in 2 minutes for an average flow of 305 gpm. Last minute was calculated at 361 gpm. The flushing valve is in operation for the first minute. Amps = 7.6. Pump 2: Pumped 34.5 inches of water or 608 gallons in 2 minutes for an average flow of 305 gpm. Last minute was calculated at 317 gpm. It is not believed that a flushing valve is installed on Pump 2. Amps = 7.6. DISCUSSIONS WITH THE CONTRACTOR: Oscar arranged for Tying of the force main on Wednesday at 1:00 pm with City staff. Omega will be on -site to assist. Omega was planning on starting site cleanup after the completion of the Tying. Omega was informed that the City would like them demobilized within the next week. Landscaping will need to occur when the weather improves. Jim Swanson worked with Hector to install the level transmitter. The pump station was running on backup floats connected to the telemetry system. Hector has some cleanup work with the electrical and control that will be completed next week. R112 will need to return for final testing of the instrtunentation when Omega has completed their work. See attached checklist for testing to be completed. Omega was unsun-e if a hushing valve was installed on both pumps. Gordy will confirm and install a second flushing valve if necessary. OBSERVATIONS BV: Mark Miller TIME AT SITE: 9:30 — 1:30 pm WEATHER: Clear and cold TEMPERATURE: —30°F MW ;5 m.Ky mX u 4 r „ i �r- �:�71,1 ` a•�� a� � , $f � jet c.. �. :, ` f s `^fi.'•�d. ,`'°"��-,yam% v3.. t vnml�f a City of Renton Denny's Lift Station Pump Station Testing & Start-up X = PASSED O = FAILED Pump Operation Pump 1 Pump 2 Station Telemetry Comments Pumps operate quietly and smoothly x x Pump removal system operates smoothly Pumps seal without leaks after removal and reset. Pumps operate on their hydraulic curve x x Above design flow. Motor amp draw is normal when operating. x x 7.6 amps, which is below FLA rating of rntr. Flowrate (GPM) 305 305 Calculated over two minutes Pressure (PSI) at Gauee na na No gauge Head at pump (calculated) na na Motor Control Panel/Telemetry Run Light x x Operation Counter na na RTM x x Ovenemp Alarms Need to test Fail Need to test Phase Fail Monitor is installed x Emergency Stop na na Hand -Off -Auto na na Ammeter na na Voltmeter na na Field Devices Water Hvdram operates correctly na Check Valve Switch Not operational. Need to test when complete. Valve Vault Flood Switch na Wet Well Floats are installed correctly x Level Transducer is installed correctly. Not operational. Need to test when complete. Influent Valves open/close smoothly na No visible leaks on influent valves na Discharge valves open/close smoothly x x Check- Valves open/close smoothly x x Flowmeter is calibrated. na No flowmeter installed this contract. Sump pump operates correctly. na No sump intalled this contract Hatch Lids open and close smoothly x Alarms and Setpoints Hiah Level Alarm Floats Need to test Emergency Pump Call Alarm Need to test Emergency Pump Stop Float Need to test Intrusion alarm system na Intrusion system not installed this contract. Overflow chamber alarm na Generator Operations Manual Transfer Switch operates correctly. Need to test Generator was connected and operates station Need to test Amp and voltmeter values are correct. na _ ATS transfers from utility to generation power, na ATTS�traansfers from generator to utility power. na I Tested by: %J % 1 %,�.�~r. /L A U Start-up by: Final bv: !2/1 II_`0n9. I1_13 AN be Mark hlilltr, nH2 Engine m, Page I LiR Station Tcatinc Chect9isr�Is.�,Chcekli.-t