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Home My WebLink AboutI-4 Staff Report - Well 7 Rehabilitation Task Order to General Pump CompanyCONSENT CALENDAR TO: HONORABLE CHAIRPERSON AND MEMBERS OF THE AZUSA UTILITY BOARD FROM: MANNY ROBLEDO, DIRECTOR OF UTILITIES DATE: OCTOBER 19, 2020 SUBJECT: AWARD TASK ORDER 11 FOR WELL 7 REHABILITATION TO GENERAL PUMP COMPANY BACKGROUND: On September 8, 2020, Well 7 was taken out of service as part of Azusa Light & Water’s (“ALW”) Well Rehabilitation Program. To restore production capacity, and improve efficiency and reliability, Staff recommends replacing the drive motor, pump, column, piping, liner, packing, oil lubricated shaft, bowl assembly, and pump to waste piping. Updates in water quality regulations require the well pump base be raised 18 inches above grade to prevent water intrusion from flooding. Subsequently, the well building, which has exceeded its design life, will also need to be replaced. The preceding work is proposed to be accomplished by ALW’s Well and Booster Pump Maintenance contractor, General Pump Company, under an existing Master Maintenance Services Agreement. RECOMMENDATION: Staff recommends the Utility Board take the following action: 1)Award Task Order 11 for Well 7 Rehabilitation to General Pump Company, under the existing Master Maintenance Services Agreement, for a not-to-exceed amount of $456,802.39. ANALYSIS: ALW Well 7 was originally constructed in 1920 with a capacity of 1,000 gallons per minute and an average production of 500 acre feet per year. The well pump has not been inspected since it was originally installed circa 1956, although the pump motor has been replaced/retrofitted several times over the last few decades. Recent performance tests show that the well is running at 55 percent efficiency. I-4 APPROVED UTILITY BOARD 10/19/2020 Special Meeting Award Task Order 11 for Well 7 Rehabilitation October 19, 2020 Page 2 On September 8, 2020, Staff authorized General Pump Company, currently operating under a Master Maintenance Services Agreement, to pull the pump, video log the entire 250 feet of the well, and provide recommendations for repair. After a complete assessment of the well, the mild steel casing was found to be deteriorating, with large holes seen throughout. The liner is also in poor condition and in need of replacement to prevent collapse. With this project, the motor, entire column, impellers and pump, oil lubricated line shaft and couplings, six bowl assemblies, and cone strainer will be replaced. Included in the recommendation is an upgrade of the pump strainer, impellers, bowl bolting, shaft coupling, line shaft, and head shaft with stainless steel material to ensure long-life and limited corrosion. Updates in State Water Resources Control Board regulations regarding water quality and source protection require the well pump base be raised approximately 18 inches above grade to prevent water intrusion from flooding. As a result, the well discharge piping will need to be modified. Subsequently, the existing wooden framed well building, which was constructed circa 1956, will also need to be replaced to accommodate the raised pump base and piping. Staff reviewed similarly designed “roll away” style buildings for replacement that are in use by other, nearby water districts. The style selected was found acceptable for ALW’s needs and will save considerable costs compared to constructing a block building. The new wooden framed building will be installed on a track, similar to the old building, allowing it to “roll away” to access the pump and motor for future maintenance. With the approval of this Task Order, Staff will coordinate with General Pump to start work as soon as possible to get the well back in service before high demand summer months. FISCAL IMPACT: Funding for Task Order 11 is available in Water Fund 32, Capital Improvement Project Well Rehabilitation Program – Well 7, Account No. 32-80-000-721-7130/72121A. The total project cost for Well 7 Rehabilitation is $456,802.39, which includes a 10% contingency. Prepared by: Reviewed and Approved: Melissa Barbosa, P.E. Manny Robledo Senior Water System Engineer Director of Utilities Carlos Solis Water Production Supervisor Reviewed and Approved: Reviewed and Approved: Jared Macias Sergio Gonzalez Assistant Director of Utilities - Water Operations City Manager Attachment: 1) General Pump Proposal – Task Order 11 159 N. ACACIA STREET * SAN DIMAS, CA 91773 PHONE: (909) 599-9606 * FAX: (909) 599-6238 CAMARILLO, CA 93010 * PHONE: (805) 482-1215 www.genpump.com WELL & PUMP SERVICE SINCE 1952 Lic. #496765 Serving Southern California and Central Coast October 1, 2020 Via Email City of Azusa 729 N. Azusa Ave Azusa, California 91702 Attn: Melissa Barbosa Subject: Well 7 General Pump Company is pleased to submit the following proposal to upgrade your Well 7 pump station. As-builts and pump engineering information will be sent to you for approval prior to purchasing the described materials in this proposal. This well was constructed about 65 years ago. The steel casing is decayed. The plan is to line the well with a 304SS casing to extend the life of this well for approximately 50 years. The existing pump base does not meet code and will be raised to 18” above grade. Cost Item Description Price 1 Mobilization and Demobilization $8,000.00 2 Wire Brush Well and Remove Accumulated Fill $5,500.00 3 Perform Post-Brushing Video Log $900.00 4 Furnish and Install Extra Heavy Duty 20” OD 0.10 Slot SS Wire-Wrapped Screen 130’ length 304SS $42,568.00 5 Furnish and Install 20” 0.375” Wall SS Casing, 120’ length 304SS $51,964.00 6 Furnish and Install Glass Beads between 26” of Original Casing and 20” liner, 3/8” NSF Beads, 195’ cu.ft. $52,320.00 7 Airburst Entire Length of Screen to Consolidate Filter Pack $6,200.00 8 Furnish New 8” SS Cone Strainer and 5’ Suction Pipe $877.00 9 Furnish New 6 Stage Bowl Assembly per Engineering submittal- Simflo Model 5P11 $15,725.00 10 Furnish 200’ of New 10” Sch-40 Column Pipe $14,390.00 11 Furnish 200’ of New Oil Lube T&S Assemblies $12,682.00 12 Furnish New Black Widow Spiders Centralizers to be Set in 40’ Spacing $98.00 13 Supply & Install New Ductile Iron Oil Lube 10” Discharge Head $4,616.00 14 Furnish New Top Tension Tube Assembly $750.00 15 Oil Assembly including 2 gallon pot, dripper assembly, tubing, and fittings $1,386.00 Attachment 1 Melissa Barbosa City of Azusa October 1, 2020 Page -2- mounting to the discharge head. 16 Head Shaft Assembly; Nut & Key $1,370.00 17 Furnish New RUSI 125HP 460V VHS US Electric Motor w/ Electrical Connection Kit $13,950.00 18 Furnish New ¼” SS Airline Assembly w/ DR Gauge $1,302.00 19 Bolting, Fittings, and Apparatuses to Complete Installation $490.00 20 Furnish Necessary Gaskets, Bolting, and Fittings to Complete Installation $200.00 21 Install Complete Pump Equipment, 217’ total length, General Pump Deep Well Oil Lube Turbine Including Airline Assembly $18,000.00 22 Wire-up Motor and Perform Start-up and Testing $2,800.00 23 Perform Final Well Disinfection to Meet or Exceed AWWA Standards $3,500.00 24 Demolish Existing Well House and Foundation, including entire length of concrete slab extending past the existing building; Haul and Dispose $18,000.00 25 Materials and Labor to Construct 4’x4’x4’ Well Head- 18” Tall (Above Floor) State Health approval concrete steel reinforced base with sounding tube, air vent, and sole plate complete. $7,050.00 26 Construct (N) 12’W x 14’ D x 9 Tall Rolling Well House with finish paint, 8° x 8° Sectional Overhead Door, (1) 2 x 7 Side Man Door for Access. Construction includes cement flooring inside building, footings and rails to properly roll the building back, and gravel finish between rail extension footings. Building to match like, Kind, Quality of Standard Design used by Golden State Water. $79,500.00 27 Prime and Paint New Discharge Piping $4,350.00 28 Remove existing 12" discharge piping and 6" pump to waste piping. Demo remaining concrete pit outside and expose existing underground piping at new connection point. Make underground connections and install 12" and 6" steel risers at new locations for above ground connection outside of building. Backfill and compact area for new concrete. Install new 10" steel discharge piping through wall of new well building including a 10” Romac Epoxy coated flex coupling with restraints inside at well head and a 10" Victaulic connection outside for removable section in order to roll back well building. Install new 2" air vac before check valve. Provide and install new 10" rubber flapper swing check valve. Make up 10" piping as needed to riser connection including injection and sample points. Install 6" pump to waste line before 10" check valve including new 6" gate valve, install existing 6" pump to waste control valve, and make up 6" piping as needed to new 6” riser connection. Note: Flow Meter not Included $41,306.90 29 Install existing 6” Pump to Waste Control Valve $1,520.00 30 Shop Labor, Quality Control, and Misc. parts $3,960.00 Subtotal (Items 1 through 30) $415,274.90 Contingency 10% $41,527.49 Total $456,802.39 Melissa Barbosa City of Azusa October 1, 2020 Page -3- Should you have any questions or need additional information regarding the above summary and associated cost, please do not hesitate to contact us. Thank you. Sincerely, GENERAL PUMP COMPANY, INC. Michael Bodart Michael Bodart President / Director of Engineering