36C25625Q0671 Questions and Answers.pdf

Chemical Treatment for Boiler and Chiller Plant

RFQ 36C256925Q0671

QUESTIONS AND ANSWERS

1. What is the full scope for treatment and/or monitoring of the domestic water loop?

Water treatment for domestic water loops.

2. Is there a plan to clean membranes off site or are the membranes changed and disposed of?

Contractor is responsible for two (2) new membrane changes per year. Cleaning the membranes is not acceptable.

3. Total gallon throughput annually for the RO?

Reverse Osmosis Unit:

Two Chemical Tanks Provided: Dichlorination product and Antiscalant Feed to RO: Total Chlorine 2.5-3.5 ppm (must be removed prior to RO Membranes) 9 Membranes All used membranes are to be taken off site for disposal Flows:

• Permeate: 32 GPM

• Feed Water: 40 GPM

• Concentrate: 8 GPM Percent Usage/Load: 40%

4. What is the current make/model for the RO membranes that are in place? How many membranes are in the RO?

Please see 22 67 19.16 - CEP Reverse Osmosis Water Purification System - Complete O&M pdf.

5. Does on site staff lock out, shut down and drain towers?

Staff will lockout the towers. The contractor will place their lock on the lockout device also. The contractor is responsible for draining the tower with assistance from the VA Staff.

6. What is the scope for the tower cleanings - is this physical cleaning 2x annually? Please share specifics

Cooling Tower Cleaning:

Minimum Requirements:

• Pressure Wash all metal surfaces of Cooling Tower

• Remove covers and Pressure Wash and remove all debris form distribution nozzles and distribution.

• Hydro Flush Fill with fire hose (Flush bottom fill, followed by top fill, then re-flush bottom fill. Upper outside fill is elevated and will need temporary equipment such as scaffolding to reach sections.

• All debris is to be removed and collected in garbage bags.

• Block off header so debris is not flushed back into header once cleaning is complete.

• Run cooling tower for 30 minutes to flush out any remaining debris.

• Following final 30 minute flush, drain system and disinfect all wetted areas with oxidizer and allowed to soak for 10 minutes. Rise and remove remaining debris.

• LOTO Trained and qualified person required to be onsite for locking out VFDs.

• Engineering/Operations required to be notified before and after each tower is taken in and out of service.

• All debris to be removed from area and towers placed back in service at completion of cleaning and each work day.

7. What is the total tower volume?

Please see Cooling Tower M09-1150 NC 800 Cooling Tower PDF.

8. What is the annual water make up for the cooling tower system?

Cooling Tower Operational Averages:

• Evaporation Rate: 71.6 GPM

• Blowdown Rate: 28.6 GPM

• Make-up Rate: 100.2 GPM

• Recirculation Rate: 4,500 GPM

• Delta Temperature: 15 degF

• Skin Temperature: 120 degF

• Load: 100%

9. Are you doing a pre and post disinfection?

Post disinfection.

10. Is there any special safety equipment/scaffolding or lifts required for the tower cleaning?

Standard OSAH requirements for using safety equipment/scaffolding or lifts.

11. Is the glycol loop included in this scope - if so what are the requirements?

No, the glycol loop system is not a part of this contract.

12. Requirements for deliveries? Is this hands free or drop off delivery?

Contractor can use the CEP load dock to transport the chemical to there prospective chemical tanks. It is the contractor responsibility to transport their chemicals.

13. Are existing chemical pumps, chemical tanks, feed equipment and controllers owned?

All equipment is owned by the VA.

14. Is remote alarming and monitoring a requirement of the bid?

No, It’s the contractor discretion weather they want to monitor the controller remotely.

15. What is the boiler horsepower - what is the annual water make up to the boilers - what is the annual condensate return?

Model 4WI, 200-600-150ST Boilers maintain 40 Cycles of Concentration

Metals in system: Carbon steel, stainless steel, and yellow metals (copper, Cu/Ni, Brass, etc) pH in Boiler Feed Water and Condensate must be maintained above 8.8 and not exceed upper limits for copper.

Operational Data:

• Steam Rate 20,700 lbs/hr

• Cycles: 40

• Condensate Return: 70%

• Boiler Feed Water Flow: 21,231 lbs/hr

• Blowdown Flow: 531 lbs/hr

• Pressure: 125 psig

16.Chilled water loop volume? Annual make up to the chilled water loop? Current active inhibitor used in the chilled water loop?

The chilled water loop volume is about 50,000 gallons.

17. Is the multimedia filter that is referenced in the scope the boiler softener - and would this be a resin rebed?

The multimedia filter is different from the softener. Please see 22 67 19.16 - CEP Reverse Osmosis Water Purification System - Multi-Media Filter FMF-100-200

18. What is the ft3 of resin per unit?

Not sure what system this question referring too.

19. Carbon filter - what is the ft3 of the units?

Please see 22 67 19.16 - CEP Reverse Osmosis Water Purification System - Carbon Filter FCF-200-200 pdf.

20. Salt - pricing table notes 52 40lb bags of salt - SOW notes 3 pallets of salt a month -which is correct and needing to be quoted Currently using 3 pallets of salt per month.

Bag Weight: Max 50 lbs No more than 4 pallets onsite at a time.

21. On page 4, section B.2 Price Cost Schedule. Item number 0001 states “Contractor shall provide weekly site chemical treatment and service to include preventative maintenance...” However, the service quantity described is 12.00.

Please clarify whether you need only one service/visit per month.

1 site visit per week (52 site visits per year)

22. On page 4, section B.2 Price Cost Schedule. Item number 0002 states “Cooling Towers Systems Environmental Sampling Protocol and Interpretation of Results for Heterotrophic Plate Counts (HPC) by a certified Lab per qtr...” There is a total of 12 cooling towers installed onsite, assuming they have one sampling point on each tower there is a total of 48 samples needed as minimum throughout the year. However, the quantity described in the cost schedule is 28.00. Please clarify you have only 7 sampling points since you need only 28 samples throughout the year.

Please correct to 48 samples per contract year plus the condensing water loop supply and return. This is an additional 8 samples, resulting in 56 total samples per contract year.

23. On page 4, section B.2 Price Cost Schedule. Item number 0003 indicates a quantity of 24.00 E.A. Does this quantity represent the total number of pallets you need each year? The reason for this question is because on page 11 of the scope of work document indicates that based on the current salt usage data provided, the water softener is using about 3 pallets of salt pellets per month and this means 36 pallets for the whole year.

There should be 65 bags per pallet, at 40 pounds per bag.

24. Please confirm whether the VA is the owner of the chemical equipment currently installed and the incumbent company will not remove them once they finish their contract.

All equipment is VA owned.

25. On page 11 of the scope of work document, on point 1 of the Preventive Maintenance (PM Service) indicates PM Service shall be accomplished weekly and all scheduling shall be coordinated with Contracting Officer Representative (COR).

However, as was mentioned above on question one, the service quantity described on the price cost schedule is 12.00. Please clarify whether you need only one service/visit per month or one PM service per week.

One visit per week, 52 visits per contract year.

26. On page 15 of the scope of work document, personnel staffing requirements, the contractor shall provide the following minimum staffing levels: One (1) Project Manager, one (Operations Manager and at least one (1) technician. Please confirm whether the PM and operations manager needs to be onsite every time that the technician needs to perform a service. Also, please confirm the minimum years of experience that the technician needs to be allowed to work on this contract.

Please refer to SOW. As per the definitions, the Operations Manager and Technician should be on site during the visits.

27. On page 19 of the scope of work document, the contractor must clean the cooling towers 2 times per year. However, the cost schedule does not include any CLIN to charge this service. Please indicate where you would like that pricing to be included.

This shall be included in the service visit schedule.

28. Please provide specifications for the cooling towers as follows:This is listed in the Cooling Tower Requirements.

Total volume, in gallons, 20,000gallons Recirculation flow, in GPM, 4,500 gpms Evaporation rate, in GPM, 71.6 GPMs Target number of cycles 3.5 cycles

29. Please provide the cooling tower makeup water gallons for last year. Please see question number 8 Cooling Tower Operational Averages:

• Evaporation Rate: 71.6 GPM

• Blowdown Rate: 28.6 GPM

• Make-up Rate: 100.2 GPM

• Recirculation Rate: 4,500 GPM

• Delta Temperature: 15 degF

• Skin Temperature: 120 degF

• Load: 100%

• Volume: 20,000 gallons

30. Please provide Boiler makeup water gallons for last year.

Model 4WI, 200-600-150ST Boilers maintain 40 cycles of concentration Metals in system: Carbon steel, stainless steel and yellowish metals (copper, Cu/Ni, brass, etc) pH in Boiler Feed Water and Condensate must be maintained above 8.8 and not exceed upper limits for copper.

Operational Data:

• Steam Rate 20,700 lbs/hr

• Cycles: 40

• Condensate Return: 70%

• Boiler Feed Water Flow: 21,231 lbs/hr

Boiler Treatment Requirements:

FDA: Must Meet 21 CFR 173.310 3 tanks available for treatment chemicals Oxygen Scavenger – Neutralized pH above 7.0 due to RO Make-up and high condensate return. Ability to test Oxygen Scavenger in the Boiler Feed Water or Boiler.

Film Forming Amine -- 0.1 to 0.2 ppm FFA in Boiler Feed Water Fluorescein traced product Dispersant/Polymer – 0.5 to 1.0 ppm in Boiler Feed Water Amine concentrations to meet FDA limits in steam/condensate Boilers maintain 40 Cycles of Concentration Metals in system: Carbon steel, stainless steel, and yellow metals (copper, Cu/Ni, Brass, etc)pH in Boiler Feed Water and Condensate must be maintained above 8.8 and not exceed upper limits for copper.

Operational Data:

• Steam Rate 20,700 lbs/hr

• Cycles: 40

• Condensate Return: 70%

• Boiler Feed Water Flow: 21,231 lbs/hr

Cooling Tower Requirements:

One tank available for Inhibitor/Dispersant/Azole, One tank for 12.5% Sodium Hypochlorite, One tank available for Non-Oxidizer.

All in one product (Inhibitor/Dispersant/Azole)

• Traced PTSA for online and offline testing

• Halogen Resistant/Stable Azole (1.5 ppm minimum)

• Capable of handling LSI of 2.8 or greater

• Dispersant/Polymer (minimum of 8.0 ppm)

Non-oxidizer (non-copper) – Minimum 1.5% Isothiazoline (Shock fed 3 times per week or as needed due to biological resutls) fed at 100 ppm.

Bleach usage: 3 gallons per day per 1000 GPM recirc due to roof runoff and recycle water back to cooling tower make-up tank.

Average Bleach usage: 13.5 Gallons per day Cooling Tower Max of 3.5 cycles of concentration Metals in system: Carbon steel, stainless steel, and yellow metals (copper, Cu/Ni, Brass, etc) Make-up Water Analysis

Cooling Tower Operational Averages:

• Evaporation Rate: 71.6 GPM

• Blowdown Rate: 28.6 GPM

• Make-up Rate: 100.2 GPM

• Recirculation Rate: 4,500 GPM

• Delta Temperature: 15 degF

• Skin Temperature: 120 degF

• Load: 100%

• Volume: 20,000 gallons

Closed Loop Requirements:

Inhibitor for Closed Loops

• Non-Phosphorus/Non-Nitrite Corrosion Inhibitor

• Traced with PTSA or equivalent

• Water loss Chilled Loop: 3000 gallons per month

• Hot Water loops losses: 100 gallons per month

• Initial dose of chemical needed for charging product to system

Non-oxidizer (non-copper) – Minimum 1.5% Isothiazoline (shock dose every 6 months or as needed due to biological testing) – fed at 100 ppm Chilled water system volume 50,000 gallons.