Q and A on Water Filtration Upgrade.xlsx
XLSX spreadsheet 82 KB Posted
- Attached to
- Condenser Water Filtration System Upgrade
- Solicitation number
- HC102821R0018
- Issued by
-
Defense Information Systems Agency
About this file
This request for proposal concerns upgrading the condenser water filtration, controls and piping system at the Defense Information Systems Agency facility in San Antonio, Texas. The contractor will enhance the cooling towers, replace piping, adjust the water pump, run temporary chillers for redundancy testing, and adjust the water filtration controls. The capital equipment project involves only the IT mechanical system and is separate from the building mechanical system. A site visit is scheduled for March 31, 2021 with two sessions for contractors to better understand the work location and conditions. Questions are due by April 9, 2021. The upgraded system aims to improve reliability, energy use, and redundancy to meet Department of Defense standards.
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Q&A Water Filtration Upgrade
| Q&A Number | RFP Page | RFP Section/ Paragraph | Solicitation Amend # | CLIN/ Clause/ Appendix/ Attachment/ Other | Contractor Questions | Government Answer |
| 1 | 9, 10 | 6.8 | 1 | Will the (2) 500 Ton temporary air cooled chillers be located inside the fence near the cooling towers or in the parking lot outside the fence? | Per the Site's direction, locate the temporary chillers in the parking lot right outside the fence. Fuel tank access will need to be maintained. | |
| 1 | 13 | 6.10.8. | 1 | Will the engineer provide his/her design drawings to assist with the contractor’s shop drawings? | Drawing set has been provided via Appendix A. | |
| 1 | 35 | 3b | 1 | Are there any impact fees (utilities, permits etc) that the contractors should be aware of for this project? | If driving in a grounding rod for the air-cooled chillers, contractor is responsible for contacting 811. The contractor is responsible for any other necessary local coordination. | |
| 1 | General | 1 | Will the contractor’s be able to work after-hours and weekends in addition to normal work hours? | No. M-F, 6:00 - 17:00. The security escorts can stagger to get them to 17:00. | ||
| 1 | General | 1 | Will the DISA maintenance staff be responsible to shut down and restart the chillers during this project? | Contractor is responsible for any coordination. DISA maintenance will asist the contractor in shutting down or restarting the Site's Chillers. | ||
| 1 | 35, 39 | 3c | 1 | Will the 5% “Surge Support” be allocated to staffing or treated as a contingency for the entire project? | This is defined in section 6.11 in the PWS. | |
| 1 | 4 | 5.1 Task 1 | 1 | Will the contractor be responsible for Commissioning or will it be provided by DISA? | As defined in section 6.9.2, contractor is responsible for testing and commission the system with Government witness and acceptance. | |
| 1 | General | 1 | Is there an insulation spec (type, thickness etc) to accompany the aluminum jacket requirement? | Contractor shall provide 1 inch thick closed-cell EPDM insulation between the pipe and the jacketing on all exterior pipe new and existing. | ||
| 1 | 16 | 11 | 1 | Will there be adequate escorts for this project? (The contractors field staff may be working in multiple locations on site) | The government will provide adequate security escorts to meet all contract and site security requirements. Facility access is controlled and project phasing is required. | |
| 1 | 6 | 6.3.2 | 1 | Are the existing Basket Strainers adequate to be re-used to help control the cost for this project? | As stated in the RFP/PWS, the basket strainers can be reused. | |
| 1 | 7 | 6.5.1 6.5.2 | 1 | The existing Triple Duty valve looks fairly new, is it adequate to be re-used to help control the cost for this project? | As stated in the RFP/PWS, the triple duty valves can be reused. | |
| 1 | 5 | 6.2.1. | 1 | Sidestream systems can only remove 15%-25% of solids from a loop. Even a basin sweeper system will have trouble removing 99% of solids. | The salient characteristics are described in section 6.2.1. See the attched independent testing results for model eTCX-210-SRV. | |
| 1 | Pg 5 | 6.2.1. | 1 | 250 gpm sidestream at the above mentioned percentage would a be a model eTCX-050-SRV (rather than the eTCX-210-SRV listed) | The salient characteristics are described in section 6.2.1. See the attched sheet for model eTCX-210-SRV. | |
| 1 | 5 | 6.2.1. | 1 | Spec asks for both an SRV (solids recovery vessel) and an ABV (automated ball valve or 'purge to drain'). You can have both, but can only run one at a time. | No comment. | |
| 1 | 9 | 6.7.4. | 1 | BAC connects is an available option | Section 6.7 of the PWS shall be followed. | |
| 1 | 9 | 6.8.2. | 1 | On the temporary chiller why 10” hose? We will have 6” flanges on the chiller and have to reduce anyway. The 6” hose can flow 1200 – 1500 GPM through each hose. | PWS is adjusted to change the minimum hose diameter for the temporary hoses from 10 inch to 6 inch. | |
| 1 | 10 | 6.8.5. | 1 | On the temporary chiller why insulate the hoses? As soon as the hose starts to sweat the insulation will come apart. | The insulation requirement may be waived if condensation inside the mechanical room is managed and the water temperature is maintained per the PWS. | |
| 1 | 5 | 6.2.2. | 1 | What is the weight capacity that is required on the maintenance cat walk? | Minimum requirements are: uniform load of 60 psf and a concentrated load of 450 lbs. Decking material shall be galvanized or another non-corrosive material. | |
| 1 | 6 | 6.2.5. | 1 | On the cooling tower motors grounding rings will you allow external grounding rings or do you require internal? |
| Internal grounding rings are required. The mnotors may be sent off for the rings to be installed during the period when the Site is on Temporary Chillers. | ||||
| 1 | General | 1 | Does a contractor have to be registered in SAM to perform work under NAICS 333415 to get the award or can they receive award under NAICS 238220 or other construction related NAICS codes. | Contractors can only receive award if registered under NAICS 333415 |
SOURCE SELECTION INFORMATION - SEE FAR 2.101 AND 3.104 FOR OFFICIAL USE ONLY
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SOURCE SELECTION INFORMATION - SEE FAR 2.101 AND 3.104 FOR OFFICIAL USE ONLY &G
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