Metropolitan Washington Airports Authority PROCUREMENT AND CONTRACTS DEPT. AMENDMENT OF SOLICITATION

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1 PROCUREMENT AND CONTRACTS DEPT. AMENDMENT OF SOLICITATION Metropolitan Washington Airports Authority Procurement and Contracts Dept., MA Crystal Drive Arlington, VA A. AMENDMENT OF SOLICITATION NO. 1B. DATED July 17, A. AMENDMENT NO. 2B. EFFECTIVE DATE Two (002) August 7, 2018 PAGE 1 The solicitation identified in Block 1A is amended as set forth in Block 3. Hour and date specified for receipt of offers is extended, is not extended. Offerors must acknowledge receipt of this amendment prior to the hour and dated specified in the solicitation or as amended, by one of the following methods: (a) by completing Block 4 and returning copy of the amendment; (b) by acknowledging receipt of this amendment on the Solicitation Offer and Award Sheet, Block 13. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. 3. DESCRIPTION OF AMENDMENT Metropolitan Washington Airports Authority Solicitation No. entitled Chemical Water Treatment Program, National Airport is amended as follows: SECTION X ATTACHMENTS, 01 STATEMENT OF WORK The Statement of Work is hereby replaced in its entirety as attached in response to questions received and answers provided for Solicitation No.. Except as provided herein, all terms and conditions of the document referenced in Block 1A, as heretofore changed, remain unchanged and in full force and effect. 4A. NAME AND TITLE OF OFFEROR 4B. SIGNATURE 4C. DATE MWAA Form PR-06 (Rev. 1/2003

2 STATEMENT OF WORK 1.0 WATER TREATMENT DETAILED SPECIFICATIONS The Ronald Reagan Washington National Airport s Water Treatment Program includes High Temperature Hot Water generators and piping system, chillers and condenser water system, chilled water storage tank and piping system, remote unfired boilers, remote chillers/cooling towers and secondary piping systems. Also included in this contract are boilers, chillers and respective piping systems located in Terminal A and the fire rescue facility. 1.1 Scope of Work The program is intended to be a Full Service contract. The Contractor shall furnish and supply all labor, materials, incidentals, supervision and services necessary to provide and deliver water treatment programs at Ronald Reagan Washington National Airport relating to equipment listed below. This shall include, but is not limited to, all treatment chemicals, all storage containers, secondary containment if not already existing, all testing equipment, all testing reagents and supplies, a fully functional water chemistry tracking and trending software program, and full training of Authority personnel and their agents. This is to include all treated equipment when in service, idle or laid up. The treatment programs shall be designed to protect the system and meet the performance requirements under the constraints of the Authority s operating sequences. A minimum of thirty (30) days inventory of each chemical must be maintained on site at all times. If feed and control equipment is not sufficient for effective control of the program, the Authority will consider purchase of satisfactory equipment. The systems sizes, capacities and annual production are listed below in Table The Boiler/Chiller/Condenser System Capacities High Temperature, High Pressure Water System Generator Manufacturer/Type Capacity (BTU/Hr.) Year Installed 1. Volcano 80 Million BTUs Volcano 40 Million BTUs Volcano 80 Million BTUs 1995 Operating Pressure Operating Temperature Total Annual Make-up in Soft Water Total BTUs Generated Annually Total HTHW system volume Operating Data 270 PSIG 380º F 50,000 Gallons 162,000 MBTU gallons Medium Temperature, Medium Pressure Heating System Operating Data Heating Closed Loop Approximately 1500 Gallons Operating Temperature 120º to 200º F Annual Make-up 2000 Gallons Attachment 01 Revised Statement of Work Page 1

3 Auxiliary Heating Systems Equipment Yearly Production Make-up Hangar 2, Non Combustible 36,000,000 lbs. 1,363,000 Gallons Boilers Terminal A, Non 7,200,000 lbs. 103,500 Gallons Combustible Boilers Percent Condensate Return 65% FW Temperature 160 o F MER #1 System Volume Annual Make-up MER #2 System Volume Annual Make-up MER #3 System Volume Annual Make-up MER #4 System Volume Annual Make-up Secondary Closed Loop Heating Loops 12,500 Gallons 100 Gallons 18,500 Gallons 100 Gallons 12,500 Gallons 100 Gallons 3,000 Gallons 50 Gallons City Water Analysis Test Make-up Hardness 159 Calcium 121 Magnesium 37 P-Alkalinity <0.1 M-Alkalinity 81 Sulfate 53 Chloride 49 Silica 4 Total Phosphate 0.2 PH 7.6 Specific Conductance 430 Cooling System Operating Data Central Plant Chilled Water System Item Manufacturer/Type Capacity Year Installed 1. Trane Centrifugal Chiller Trane Centrifugal Chiller Trane Centrifugal Chiller Trane Centrifugal Chiller Trane Centrifugal Chiller Trane Centrifugal Chiller 1175 Under Constr. Attachment 01 Revised Statement of Work Page 2

4 Chilled Water Operating Data Days Operation 365 Delta T 18 0 Percent Load 100% 12 hours off peak + 20% on peak five (5) months 60% 12 hours off peak 7 months Estimated Annual Hours 8800 Chilled Water Loop Temperature 42º Out, 60º Return Chilled Water Loop piping Volume 400,000 gallons Chilled Water Storage Tank Volume 2.2 Million Gallons Chilled Water Storage Tank Temperature 39º F in/out - 60º F out/in Chilled Water Annual make-up *400,000 Gallons Approximate Total chilled water system volume 2.6 million gallons *400,000-gallon make-up is due to the following: 1. Approximately 300,000 gallons are consumed during annual testing of fire pumps that are connected to the chilled water storage tank ,000 gallons due to blow down of coils, strainers, expansion tanks, etc. Condenser Water Operating Data Condenser Water Volume 205,000 Gallons Condenser Operating Temperature 85/95 Annual Ton Hours 12,300,000 Terminal A Heating Boilers Item Manufacturer/Type Capacity Year Installed 1. Patterson and Kelly 4 Mil. BTU Patterson and Kelly 4 Mil. BTU Patterson and Kelly 4 Mil. BTU Patterson and Kelly 4 Mil. BTU 2015 Chillers Item Manufacturer/Type Capacity Year Installed 1. York Centrifugal Chiller/Cooling 350 Tons 1989 Tower 2. Trane Centrifugal Chiller/Cooling Tower 350 Tons 1999 Refurbished Condenser Water Operating Data Condenser Water Volume 3,000 Condenser Operating Temperature 85/95 Average Percent Load 50% Average Days/Per 300 Average Hours/Day 24 Attachment 01 Revised Statement of Work Page 3

5 Chilled Water Operating Data Chilled Water Volume 5000 Chilled Water Makeup Health and Safety The Contractor must submit complete and updated Safety Data Sheets (SDS) that meet the OSHA hazard communications standard for the products to be used in the performance of the work. The Contractor must provide a 24-hour, 7 days per week emergency response contact who can be called for emergency information regarding chemical spills or accidents involving the vendor s products. The Contractor shall submit the emergency phone number and a sample of documentation that outlines instructions for reporting accidents and chemical spills. 1.4 Services to be provided The Contractor will provide a fully functional water chemistry tracking and trending software program that work in concert with computer-generated reports on energy use in boiler and cooling systems. It is expected that all reports and data from the tracking program are compatible with standard transmission and integration with typical spreadsheet and word processing programs. The Contractor shall maintain a 24-hour emergency response telephone contact for spills or accidents. Bi-monthly Services - The Contractor shall schedule visit to the facility twice each month with visits approximately fifteen (15) days apart. During each visit, the Contractor shall meet with COTR or his/her representative to conduct tests on all treated systems, review the test results and any new procedures, review the treatment logs maintained by the central plant, answer questions from personnel, make any required changes in treatment procedures and forward written reports of actions to the plant supervisor at central plant. All service reports, Lab water analysis, Lab reports, Coupon analysis, Plant correspondence, Training materials, Test procedures, Historical data, etc. must be in delivered in a electronic format, viewable with typical personal computer word processor. These e-documents shall be delivered via . The Contractor shall run, on each service visit, an instantaneous total heterotrophic bacteria test on both the chilled and condenser water to monitor the effectiveness of the biocide program. The contractor shall also run on each visit a total heterotrophic bacteria count test by dip slides. Quarterly Services - Quarterly, the Contractor will run quarterly samples of differentiating sulfate-reducing bacteria, nitrifying bacteria, denitrifying bacteria, iron related bacteria, pseudomonas bacteria, and slime forming bacteria as well as total aerobic heterotrophic bacteria. The Contractor shall forward split samples of the condenser water and chilled water to their own laboratory to verify and supplement field analyses. These analyses must include copper and iron tests as well as an azole test. The Contractor shall run continuous corrosion studies on the condenser, chilled water system and condensate return systems. The testing sequence will include ninety (90) day coupons, at a minimum. Attachment 01 Revised Statement of Work Page 4

6 Microbiological Testing The Authority is concerned with bacteria control in water systems and the potential growth of Legionnaire s Disease Bacteria (LDB). The Vendor shall provide laboratory data concerning biocidal efficacy in controlling LDB growth. The Contractor shall test for LDB, record and report test results to the COTR, inform the COTR when results are beyond acceptable limits, and provide treatment measures and instructions to bring the water system back to within acceptable limits. The Contractor shall keep the Authority personnel informed on any new reports from the Centers for Disease Control, Atlanta, Georgia. The Contractor shall provide its most recent report on Legionnaire s Disease. Biannual Services The Contractor shall provide particle size study analysis on both chilled and condenser water at least two times a year. Seasonal Services - The Contractor shall be present seasonally, summer for generators and winter for chillers, and each time the equipment is opened for inspection and provide a written report on observed conditions indicating the effectiveness of the treatment programs. COTR shall coordinate the schedule with Contractor. The Contractor shall provide complete instructions for cleaning and treating systems and equipment before and when being initially placed into service. Contractor shall also provide complete instructions for deactivating and protecting systems and equipment when taken out-ofservice. The Contractor shall provide written instructions and supervision for protecting idle systems under stagnant flow conditions taking into consideration the operating variables of the facility. Services on Request - Analysis performed at the laboratory shall also include analyses of suspect water, scale, deposition, corrosion specimen, internal generator scale and fireside deposits, if any, and provide a written report of analyses. The Contractor shall provide complete written directions for applying all recommended treatment chemicals and materials, including procedures to maintain all proper operating conditions within the equipment being treated, and actions to be taken when conditions are not within prescribed operating parameters. The Contractor shall provide written instructions and supervision for draining, flushing and refilling of all systems and equipment before water treatment is started. If flushing is required due to change-out of chemical by Contractor, it will be done by the Contractor at their own cost. The Contractor shall take samples of treated water, deposits, or raw water for analysis when considered necessary for effective control of the water treatment programs, in addition to the normal service. The Contractor shall run resin analyses on the water softener units located at the Central Plant, Hangar 2 and Terminal A. Attachment 01 Revised Statement of Work Page 5

7 1.5 Chemical Delivery Method and Feed Equipment The contractor shall supply all liquid chemical via a drum-less delivery system. The drum-less system shall include the following; a diked bulk tank that requires no handling by plant personnel. Delivery of chemicals also shall not require handling by plant personnel. The Authority owns the existing chemical feed and testing equipment, and may purchase additional equipment, if required, from the Contractor. All chemical tanks, totes, and secondary containment shall be provided by the contractor. 1.6 Chemicals All biocide chemicals used shall have an Environmental Protection Agency (EPA) registration number and all Safety Data Sheets (SDS). The Contractor shall supply an emergency spill response number that will be manned 24-hours per day, 7 days per week. All treatment products supplied under this contract must be manufactured under ISO 9001 certified procedures. A. Non Combustible Boilers The internal boiler water treatment program shall be a minimally precipitating program. The make up water to these boilers is softened. The program shall use an oxygen scavenger fed separately from the internal and neutralizing amine treatments. A sodium sulfite-based oxygen scavenger, internal boiler water treatment and neutralizing amine-based condensate treatment for the Non-combustible boilers. The Contractor is invited to provide alternative treatment methods in addition to the required method described above. The condensate treatment shall be an aqueous blend of neutralizing amines that will meet the ph specifications at any area tested in the steam system supplied by the boiler. The amine distribution ratio must be proper for even distribution from the separate steam headers for the complex. The Contractor shall maintain, at a minimum, the following: B. Condenser Water Alkalinity limits ppm Sulfite limits ppm Condensate ph limits ph Conductivity limits 3000 mmhos max Blowdown to be set at 4 percent of feedwater The condenser water treatment shall be a blend of zinc, inorganic and/or organic phosphate, synthetic polymeric dispersants, halogen resistant azole, and molybdenum as a tracing element. A minimum of 2.0 ppm of free and available residual azole must be provided at all times. Supplemental feed of a halogen resistant azole will most likely be necessary to maintain this free residual azole in the condenser system. Bi-weekly testing will confirm the azole level in the system. Attachment 01 Revised Statement of Work Page 6

8 The primary liquid biocide program for bulk water sterilization shall provide and maintain a free and available halogen as Cl requirements were 4,000 gallons of 12.5% active sodium Hypochlorite. A second alternating biocide program shall be provided for, at a minimum, proactive application as a penetrating, non-oxidizing biocide primarily against anaerobic bacteria. The secondary biocide shall be 120 ppm of 1.5% isothiazolin solution, applied bi- weekly. The dosage is to be introduced to the condenser water system within one hour from start of application, with a minimum 4 hour lock-out of system blowdown. The ph of the condenser water shall be maintained at a ph of 7.4 to 7.8. The addition of sulfuric acid will be required to maintain this ph level. The Contractor shall maintain the following limits: C. Chilled Water Cycles of Concentration 6.0 maximum ph Free and available residual azole 2.0 ppm minimum Continuous Free Halogen 0.5 ppm to 1.0 ppm Langlier Index less than 2.5 Units 1. The Primary Chilled Water Treatment Program shall be a buffered nitrite with azole for copper protection. Nitrite limits to be ppm as NO 2 and ph A minimum of 5.0 ppm of free and available residual azole shall be maintained at all times. The liquid non-oxidizing biocide shall be 120 ppm of 1.5 percent isothiazolin per dose. The total system for calculation purposes is 2.6 million gallons. Doses of the product will be contingent upon the bacteria level in the system. Other alternate chilled water treatments will be considered if superior performance over nitrite with azole is cost effective as determined by the Authority. The Contractor is invited to provide an alternative biocide treatment in addition to the required method described above. D. High Temperature Hot Water System The High Temperature Hot Water (HTHW) system treatment shall consist of a liquid corrosion inhibitor formulated to remove oxygen and passivate iron and copper surfaces. The ph shall be controlled by addition of alkali. Corrosion inhibitor ppb ph E. Secondary System/Medium Temperature Hot Water System Medium Temperature System same as HTHW, item D above. Attachment 01 Revised Statement of Work Page 7

9 1.7 Chemical Description Prior to implementing chemical changes, the contractor shall provide a list of all chemicals including a description with product data sheets for each system and Safety Data Sheets. The Authority must approve any chemical or program change before changes may be made. If flushing is required due to change out of chemical by Contractor, it will be done by the Contractor at their own cost. 1.8 Performance Criteria Boiler/Generator Water Condensate corrosion will average less than 1 mils per year on mild steel. Iron transport studies will be run to maintain boilers free of iron deposits. Condensate iron levels will be maintained at or below 1.0 ppm; Copper levels will be maintained below 0.5 ppm. Condenser Water System approach temperatures will not exceed 9 o F based on a clean system operation of 7 F. Mild steel corrosion will average less than 1 mils per year on corrosion coupons. Copper corrosion will average less than 0.1 mils per year on corrosion coupons. Microbiological activity will be maintained at less than or equal to 1.0 x 10 4 colony forming units per milliliter and Sulfate Reducing Bacteria will be maintained at 0 colony-forming units. All equipment shall have clean heat transfer surfaces with no pitting as determined by the Authority and their consultants. Tower water conditions will be maintained below a Langlier Saturation Index of 2.5 units. Chilled Water or Closed Loop Waters Mild steel corrosion will average less than 0.5 mils per year on corrosion coupons. Copper corrosion will average less than 0.1 mils per year on corrosion coupons. All heat transfer equipment shall have clean heat transfer surfaces with no pitting as determined by the Authority and their consultants Microbiological activity will be maintained at less than or equal to 1.0 x 10 3 colony forming units per milliliter and Sulfate Reducing Bacteria will be maintained at 0 colony-forming units. Attachment 01 Revised Statement of Work Page 8

10 1.9 Service Reports All service reports, Lab water analysis, Lab reports, Coupon analysis, Plant correspondence, Training materials, Test procedures, Historical data, etc. must be in delivered in a electronic format, viewable with typical personal computer word processor. These e-documents shall be delivered via . All regular service reports must be provided in accordance with the Scope of Work. A minimum of thirty (30) days inventory of each chemical must be maintained on site at all times. Attachment 01 Revised Statement of Work Page 9