512A5-18-302_PRE-BID RFIS RESPONSES 05312022.pdf

Project 512A5‐18‐302 Construct Central Emergency Power Distribution

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

001 VDCI ES101

On drawing ES101, are existing concrete slabs to be demolished and removed from the site? If so, what type of backfill and landscaping will be required?

Concrete slabs to be demolished completely. Backfill to grade with suitable fill. Match gravel stabilization adjacent.

002 VDCI ES101

The drawings indicate that the existing road is to be cut and patched after construction in two places. Drawing ES101 provides the only reference to the cut and patch work to be performed. The note on the drawing says, “Patch to match existing material.” Please indicated which asphalt detail on drawing CS501, Detail B7, C7 or F1 applies.

CS501 Detail F1 applies to trench cut and patch work.

003 VDCI

C‐002

CS101

CU101

S101

CS103

Drawings C‐002, CS101, CU101, S101 and CS103 show two “U” shaped structures for the generators. Drawing E‐501 shows a separate enclosure for each individual generator. Are the generators to be placed on the concrete slab individually or are two generator enclosures to be mated by an enclosure extension to be built between two enclosures? The design of the singular Tank Platform on drawing S101 seems to indicated that only one platform is to be provided by the Contractor. Is it the government’s intent for the Contractor to provide intermediate enclosures between two generator enclosures so that personnel can climb the Platform and enter one of two main enclosures, each housing two generators? If so, the generator enclosure detail on drawing E501 shows a set of double doors in the center of and on both sides of the enclosures. The intermediate enclosures would need to be large enough to ensure that the doors can function.

Please follow drawing ES103 Partial site plan and provide seperation between generators #1 & 2, #2 & #3, #3 & #4 allowing the generator enclosure doors to swing 180 degrees.

004 VDCI S101

Drawing S101 and Detail B3 on that drawing show the Slab Edge around the perimeter of the concrete slab. It does not show a Slab Edge or concrete turn‐ down around the perimeter of each generator or at the edge of the two “U” shaped structures where the Tank Platform is to be installed. Is the Slab Edge to be provided only on the four sides of the perimeter of the concrete slab?

Slab thickness and perimeter turn down are as shown at the four sides. Slab thickness is across entire slab field. The contractor shall coordinate the installation of any additional thickened slab areas indicated by the equipment anchorage requirement.

005 VDCI S101

Drawing S101 and Detail B3 on that drawing show the Slab Edge around the perimeter of the concrete slab. It does not show a Slab Edge or concrete turn‐ down around the perimeter of each generator or at the edge of the two “U” shaped structures where the Tank Platform is to be installed. Is the Slab Edge to be provided only on the four sides of the perimeter of the concrete slab? Reference RFI 004_VDCI

006 VDCI n/A The Generator Paralleling Switchgear Enclosure shown on multiple drawings will require two means of egress. Please explain if two means of egress are required and if so, how the means of egress and additional doors shall be provided and where.

Provide means of egress on either side of enclosure

007 VDCI E501

The Generator Paralleling Switchgear Enclosure shown on drawing E501 appears to indicate the switchgear to be installed within 4 inches of the sidewall of the enclosure. The layouts of the enclosure on other drawings appear to indicate that the switchgear is to be located in the center of the enclosure. Please clarify the dimensions for the location of the switchgear within the enclosure. In doing so, please ensure that suitable working space and space for the removal/service of the switchgear are provided.

Front clearance of 72" minimum required for portable lift truck. Side clearance of minimum of 36" shall be provided. Rear clearance via access doors or panels allowed in the enclosure.

008 VDCI Please confirm that the electrical transmission utility is BGE and that BGE standards for utility approved CT’s applies to the project. Confirmed, BGE is the utility provider and measurement CT's must meet BGE approval

009 VDCI S101 detail F1 Please confirm that all conductors can be installed through one core drill in the sides of the existing and new manhole according to Detail F1 on drawing S101. confirmed

010 VDCI S101 Does the 118’ x 100’ screen wall shown on the drawings need to be installed at a specific time during construction or can it be built at the end of construction?

The wall shall be in place at the time the systems are fully commissioned, end of construction is acceptable for installing the screen wall after the foundations and systems are in place

011 VDCI E‐601

Please verify that the buildings serviced by the existing switchgear are dual fed as shown on drawing E‐201 and that each utility transformer shown on drawing E‐601 can support the load of the entire existing switchboard. Yes, currently the utility transformers support the load of the existing switchboard.

012 VDCI N/A

Will the Contractor be required to schedule and coordinate the shutdown of power with each individual building or will the government perform that coordination and verify to the Contractor that all systems on the load side of the switchboard can be shut down during a specific time period?

VA will provide coordination with VA owned buildings and occupants. Shutdown scheduling shall meet requirements in specification 01 00 00

013 VDCI E‐201

Paragraph 1.1C. of Specification Section 26 23 13 says, “The system shall be equipped to parallel five (5) engineered generator sets (2 new, 3 future)…” Section 26 32 13 does not state the quantities of generators and enclosures to be provided in the base scope of work. Drawing ES103 indicates Generator #1, #2, #3 and #4. Are four (4) generators and four (4) enclosures to be provided as part of the base scope of work? If so, please provide a change to Specification Section 26 23 13 paragraph 1.1C. and a note on drawing ES103 stating that the Contractor is to provide four (4) generators.

The design requires 4 new generators and provisions in the new switchgear for a future 5th generator.

Reference re‐issued specification 26 23 13

014 VDCI

26 32 16‐6 404 section C

The gen specs list 4160 V and this matches the output of the utility transformers. The switch gear is asking for 15 kv class. Which can be done but 5kv class would be sufficient. Is the gear to be rated at 15KV or 5KV class?

Provide 15 kV rated switchgear as indicated.

015 VDCI

26 32 13‐6 404 section c

The generator specs are asking for Tier IV emissions. This is not required for emergency standby units. We can do this but it would be compliant, we do not have certified units in this size range. I need to know if Tier 2 or a compliant unit will be acceptable Provide Tier IV generators as indicated in the specifications and on the drawings.

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

016 VDCI

RFP pg 20 26 52 00 1.3B

Requires all work to have a 1 year warranty from date of completion. Spec 265200 1.3B requires a 2 year warranty. What are the warranty requirements.

General warranty items require a minimum 1 year warranty from project acceptance, special warranty items are described in certain specifications and may have warranty periods longer than the general warranty period.

For instance, all items provided in specification 26 52 00 require a 2 year warranty from date of project acceptance.

017 VDCI RFP pg 20 Requires hazmat materials shall be removed as shown in work area. Please confirm there are no hazmat materials shown to be removed?

Reference provided lead and asbestos sampling reports for all known hazardous materials

018 VDCI RFP 1.8 pg 23 Paragraph 1.8 says the VA master specification shall be used as the default when no specifications are issued in the RFP package. Confirm that the specifications issued with the RFP are the Specifications to be used. Otherwise, please provide all inclusive specification?

VA Master specifications may be found at https://www.cfm.va.gov/til/spec.asp

019 VDCI RFP para 1.86 Paragraph 1.86 no work is permitted on Federal Holidays. Will electrical outages be allowed to be performed during normal days and hours?

Refer to RFI 038_AmVet. Electrical outages shall be scheduled per specification 01 00 00

020 VDCI RFP Who is the utility supplier to the VA at this site Baltimore Gas and Electric is the delivery service

021 VDCI

C‐001 General Civil Notes C

Requires all fees, permits and licenses to be included for the contractor's work. A DOEE permit to construct is required and is the responsibility of the owner.

Confirm that a DOEE permit for this facility already exists and will be modified by the VA?

A MDE "Air Quality Permit to Construct" will be obtained during the submittal and equipment selection process by the VA.

022 VDCI

C‐001 Spec 01 00 00 1.6 G.1.

Requires all fees, permits and licenses to be included for the contractor's work. Specification 10000 1.6 G.1 requires utility fees to be paid by the Government.

What specifically does the contractor need to pay for?

the VA is responsible for utility connection fees, unless otherwise specified all other permit fees inherent to the project scope of work are the responsibility of the contractor.

023 VDCI

C‐001 General Civil Notes F

Requires asbestos abatement for associated new and demolition construction. Identify any and all asbestos that has to be abated for demolition items?

See provided asbestos inventory and sampling. Abatement of asbestos is required only to the degree required to complete contract work

024 VDCI

C‐001 General Civil Notes F

Requires all manuals, as‐built drawings and O&M manuals to be provided in electronic format. Specification 10000 1.19 requires 4 hard copies of O&M manuals. Are electronic copies acceptable? Provide quantity of close‐out documents as specified

025 VDCI

C‐001 General Civil Notes

Coordination of Construction with VA Operations there is a note that requires the contractor to halt construction on noise producing equipment operations defined at the construction kick‐off meeting. For bidding purposes we need to know what noise producing equipment is defined and any restrictions required by the contractor?

Noise above 90 decibels shall take place between 7:30am and 4pm Monday to Friday. No work shall take place on federal holidays

026 VDCI

CD501

Spec 01 00 001.6l

Shows the temporary construction fence 6' high. Specification 10000 1.6I requires a 7' high construction fence. These are conflicting requirements? Specification 01 00 00 governs

027 VDCI

ES 101

Note 2

Note 2 is to relocate two existing capacitor banks. Please provide the manufacturer and model number of the capacitor banks. not available

028 VDCI

ES101

Note 2

Note 2 is to relocate two existing capacitor banks. Does the existing system have a power factor meter cabinet and if so where is this located? NO PF Cabinet

029 VDCI ES 101

Note 2 is to relocate two existing capacitor banks. Do the existing capacitors have fixed mounted CT's for control mounted on the capacitor or are they "floating" on the power cables?

fixed mounted CTS

030 VDCI ES101 Note 5 requires removal of the existing switchgear. Does the existing battery system, concrete foundation, bollards, outdoor walk‐in enclosure, etc. remain? No. All equipment, structures, and pads associated with switchgear shall be removed.

031 VDCI ES102 Do the existing manholes have stanchions and arms that can be used for new cables? yes

032 VDCI ES103

Note 1 & 13 has a requirement to relocate an underground electric/COMM lines. Provide information as to the conduit size, what type of cable, voltage of cable, number of conductors, cable use, etc. for each line?

Assume 100 lf of 2x2 ductbank and (2) 500 pair phone lines

033 VDCI ES103

Note 12 has a requirement to relocate an underground electric line. Provide information as to the conduit size, what type of cable, voltage of cable, cable use, number of conductors, etc.?

Assume 2 x 2 duck bank and 100 lf od 500 mcm conductor

034 VDCI ES103

Note 13 has a requirement to relocate an underground communication line. Provide information as to the conduit size, what type of cable, voltage of the cable, cable use, number of conductors, etc.?

Reference RFI 032_VDCI

035 VDCI ES103 Is any lightning protection required for the switchgear or generator enclosures? There is no lightning protection required.

036 VDCI

ES101

ES102

ES10

The new duct‐bank between the existing substation and the new location is a 13 way duct‐bank. The duct‐bank indicates 11 new feeders and two spare ducts.

There will also be two new utility feeders. If the utility feeders are a single set then we will need 13 ducts for all the feeders and there won't be any spare ducts. Confirm this is correct?

Two spare ducts are required for the new ductbank.

037 VDCI S101, Detail D2 Detail D2 is only shown between two generators. Is there a requirement for a steel platform for the other generators?

Ladder/platform system is shown/detailed between two separate generator systems. Final configuration and access of each of the generator systems is unknown, however access for top access to each of the systems shall be considered.

038 VDCI

CS501

Detail C3

Detail C3 general note requires an aluminum ladder. In electrical manholes shouldn't this be a fiberglass ladder?

Vault ladders are not required to be non‐conductive assuming electrical and grounding installations are installed properly.

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

039 VDCI

E101 Note 5

Demolition note 5 requires removal of the existing emergency feeder and splice the normal feeder to the load feeder inside the transfer switch. What size conductors are the normal and load feeders?

The Normal Load Conductors are (4) #500 KCMIL

040 VDCI

E101 Note 5

Is it acceptable to direct bury the feeders from the manual transfer switch to the generator building? No, feeders shall be installed in concrete encased duct bank or rigid conduit per project specifications

041 VDCI E101

There is an existing ATS shown inside the generator building. The oneline diagram does not show this ATS. Is anything to be done to this switch? The existing ATS is to remain as indicated by the light lineweight.

042 VDCI E101 The new work plan shows a box with "SW" in the middle to the left of the generator building. What is this and is there any requirements? That is an existing switch that is to remain as indicated by the light lineweight.

043 VDCI E101 How much fuel is in the 500 gallon tank currently? Assume for bidding purposes this tank is full. Polish fuel and transfer to nearby boiler plant bulk storage tank. Remove any water and filter to 30 micron

044 VDCI E102

Note 2 requires removal of two 15000 gallon fuel tanks. On the sight visit we saw two 700 gallon day tanks adjacent to the main tanks. Confirm the day tanks remain? All equipment associated with the fuel tanks are required to be removed.

045 VDCI E102

Shows a new motor control center MCC‐321. There is no information as to the size, voltage, type of starters, amount of starters, size of starters, what type of loads are to be connected, etc. on any drawings. There is no specification for this either?

This equipment is existing to remain as indicated by the light lineweight.

046 VDCI

E102 Note 2

Note 2 requires removal of one neutral grounding resistor. On the sight visit we saw two NGR's. Confirm only one gets removed?

Yes that is correct. Only one NGR must be removed.

047 VDCI

E102 Note 4

Note 4 requires removal of an existing parallel switchgear. Do the batteries, rack and charger also get removed? Yes, all associated equipment gets removed.

048 VDCI

E102 Note 5

Note 5 requires removal of the existing emergency feeder and splice the normal feeder to the load feeder for two transfer switches. What sizes are the existing feeders and how many sets for each transfer switch?

note 5 on what sheet

049 VDCI

E102 Note 5

Note 5 shows two existing transfer switches. On the sight visit we saw four transfer switches. Confirm that note 5 only applies to two switches? Provide demolition as shown on E‐102. Light lineweight indicates existing to remain.

050 VDCI

E102 Note 5

Note 5 shows two existing transfer switches. What is the voltage of these switches? Existing transfer switches are 480V.

051 VDCI E102

The building 321 first floor plan, in the lower left corner, shows two "New ATC Panels". What are these for and provide all information necessary for bidding requirements? These are existing panels to remain as indicated by the light lineweight.

052 VDCI E102 How much fuel is in the two 15,000 gallon tanks? Reference RFI 002_BRCon

053 VDCI E102

Can you provide a one‐line electrical drawing for all the equipment in building 321?

one line diagrams are not available

054 VDCI E102

Do the electrical conduits on the exterior of building 321 coming from the generators get abandoned in place?

No, conduits need to be removed

055 VDCI E201 Do all the buildings on the facility have dual feeders or are they loop fed? Buildings are loop fed.

056 VDCI

E‐501 E‐502

Under Generator and Enclosure Electrical Equipment there is a 60 amp fused disconnect switch listed on drawing E‐501. The E‐502 drawing does not show a 480V disconnecting means at the generator enclosure. Please clarify the requirement. Provide as required on Sheet E‐501.

057 VDCI E‐501

Under Generator Enclosure and Electrical Equipment there is a 30GPM fuel polisher with cabinet listed. Provide a specification for this item?

Each generator manufacturer will provide UL listed base mounted fuel tank. Follow drawing E‐501 generator side view elevation requirements.

058 VDCI E‐501 The drawing shows a base fuel tank. The specifications do not address a base mount fuel tank Provide a specification for the tank? Yes, these may be LED type fixtures.

059 VDCI E‐501 Under Switchgear and Enclosure Electrical Equipment it lists metal halide type exterior fixtures. Should these be LED type fixtures? LED type fixtures will be acceptable.

060 VDCI E‐501 Is a fire alarm system required for the switchgear enclosure? no 061 VDCI E‐501 Is a intrusion protection system required for the switchgear or generator enclosures? no

062 VDCI E‐502

The 208Y120V panel does not show any circuits for dampers, jacket heaters, alternator heaters, exhaust fans, 5KW heaters, fuel polisher, etc.?

Common 208Y/120V is located inside of paralleling switchgear enclosure. See Sheet E‐501. Provide connections for these circuits per generator manufacturer requirements

063 VDCI E‐601

Please provide the sizes of all the existing 4160V load feeders to be spliced and extended to the new switchgear? The size must match existing. See E‐601 MV Cable Schedule for cable mark #1

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

064 VDCI E‐601

Are the existing load feeders to be spliced and extended rated 5KV or 15KV? Refer to sheet E‐601 MV Cable Schedule requirements, which indicate 15 kV rated cable.

065 VDCI E‐601 What are the sizes of the new utility feeders to the new switchgear? Refer to sheet E‐601 MV Cable Schedule.

066 VDCI E‐601 What are the sizes of the new capacitor feeders to the new switchgear? Provide (3) #2 CU, MV‐105, 15kV cable.

067 VDCI

E‐601 Note 2

MV Cable Schedule, where does note #2 apply?

See E‐001 Ductbank Section with a reference to E‐601 Cable Schedule.

068 VDCI

E‐601 Note 2

The MV Cable Schedule note #2 requires three 4/0 15KV CU & #1/0 AL 600V neutral. In a 4160Y2400 volt system the neutral is rated 2400 volts. If a neutral grounding resistor is existing on the substation transformers there is no need to extend the neutral to the new switchgear. Confirm if the 1/0 AL 600V is to be used as a ground and not a neutral?

Existing transformers do not have a neutral grounding resistor. The 1/0 AL, 600V will be used as a neutral.

069 VDCI E‐601 Confirm the size of the feeder to the new load‐bank? The size of the feeders to the new load bank is (3) #4/0 CU, 15 kV cable.

070 VDCI E‐601 Confirm the sizes of the new feeders to the relocated capacitor banks?

New feeders to the relocated capacitor banks shall be (3) #2 CU MV‐105, 15 kV.

071 VDCI E‐601

It will take 8 hours to perform a three conductor 4160V splice. Is there any requirements to supply temporary power to buildings? Reference RFI 038_AmVet

072 VDCI E‐601

Can you provide a complete power one‐line diagram of the VAMC facilities? no

073 VDCI 26 53 00 2.1A Does not specify the size of the neutral grounding resistors (Specs 265300) NGR Size is rated at 400 A.

074 VDCI 01 00 00 1.2D The VA will retain testing laboratory services. Please provide a complete list of all testing services to be provided by the VA? (Specs 100000) Contractor responsible for testing and laboratory services per 01 45 29. Specification provided by addendum

075 VDCI 01 00 00 1.5E A limited number of permits shall be issued for the contractor parking. How many spaces will be provided? 20 parking paces will be available, at adjacent building 101.

076 VDCI 01 00 00 1.6D Storage spaces shall be determined by the COR. How many sq. ft. of space will be provided and what will the location be for the designated storage area. Contractor shall limit storage to within the limit to disturbance

077 VDCI 01 00 00 1.18

Pre test mechanical and electrical equipment and systems before final test. Specification 263213 requiors extensive generator testing using load‐banks.

Complying with section 100000 1.18 would require the generator etensive testing twice. Are 2 test required?

The contractor shall provide all testing as required is section 263213 and yes two tests are required.

078 VDCI 26 05 26 3.8

If the ground system resistance exceeds 5 ohms modification for compliance wil be without additional cost to the Government. Drawing ES103 clearly shows the grounding plan requirements. If the contractor installs the grounding system according to the drawings and specifications why wouldnt any additional grounding requirements be treated as a change?

Provide grounding as shown on sheet ES103 and do grounding test to see ohm level.

079 VDCI 26 05 33

This specification is not clear regarding the type of conduit that can be used for below 600V systems in underground installations. Can all conduits for circuits 600V and below be schedule 40 PVC direct buried? All conduits below grade can be schedule 40 PVC concrete encased.

080 VDCI 26 05 33 3.4H All exposed conduit is to be painted. All the work will be installed behind a screen wall. Can this requirement be deleted? Provide conduit painting as called for in the Contract Documents.

081 VDCI 26 05 41 2.1 Specifies hot dipped galvanized (HDG) stanchions and arms. Can nylon stanchions and arms be used in lieu of HDG? Provide HDG as called for in the Contract Documents.

082 VDCI 26 23 13 1.1C The new system is for 2 new and 3 future generators. The drawings and RFP show 4 new and 1 future generator. Clarify the requirement? Provide 4 new generators and with provisions for 1 future as shown on the drawings

083 VDCI 26 23 13 2.4

Requires two 24" remote annunciator panels including at the Engineering Control center. Identify what buildings and room numbers the panels shall be installed. Please provide a site plan showing where the buildings are located relative to the paralleling switchgear building? Please provide a conduit route to each location from the paralleling swithcgear building? One remote annunciator will be placed in building 315, another will be placed in building 321.

084 VDCI 26 23 13 1.1C

The paralleling switchgear requires peak shaving abilities however in the "Sequence of Operations" attachment there is no mention of peak shaving. Explain this intent?

The intent is to have a manually initiated peak shaving mode that will parallel the generators with utility and allow export of power

085 VDCI 26 23 13 1.1C If peak shaving is an intended use for this project is there an agreement in place between the VA and the utility and between the VA and PJM? There has been no agreement at this time.

086 VDCI 26 32 13 2.1 C1 The new generators are to be emergency stand‐by, Tier IV. Confirm that the engines shall be Tier IV compliant Provide Tier IV as called for in the contract.

087 VDCI 26 32 13 2.1 C2

The new generators are to be emergency stand‐by, Tier IV. We see no UREA tanks and SCR's shown on any of the drawings or required by specifications.

Confirm that the engines shall be used as emergency stand‐by? ProvideTier IV STAND‐BY Generators as called for in the Contract Documents

088 VDCI

26 32 13 2.14C E‐501 There are two different sound ratings 85 dBA at 5 feet and 75dBA at 50 feet. Drawings E‐501 calls for 75dBA at 25 feet, please confirm requirement. Provide 75 dBA at 25 feet

089 VDCI 26 13 13 2.2 C2 The exterior finishes shall be specified in section 096000. Please provide specification 096000 Generator shall be painted per 26 32 13 2.14 E.2 and 26 32 13 2.1 E. color shall be selected by the

COR

090 VDCI 26 31 13 2.13F/G Alarms for a day tank and main tank are required. Confirm that only base tanks are to be provided for each generator? Day tanks are not required. Base belly tanks are to be provided as indicated.

091 VDCI 26 32 13 3.2J

Requires parallel testing each engine generator loaded to its service load, 2MW. To perform this test an 8MW load‐bank would have to be provided for four generators. Confirm this requirement? This is confirmed this is a requirement.

092 VDCI 26 32 13 2.9 An electric heater is to be provided for the lube oil. The generators will be inside a heated enclosure. Can this item be deleted? The electric heater is standard and shall be provided.

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

093 VDCI 26 32 13 2.12

Pararaph A requires a molded‐case UL 489 circuit breaker. Paragraph B requires a medium‐voltage vacuum breaker. By NFPA70 a unit mounted circuit breaker is not required on the generator. Either delete this item or clarify the type of breaker to be supplied? Provide Breakers and Controls per section 26 23 13 Generator Paralleling Controls

094 VDCI 26 32 13 2.14ES Requires an internal mounted exhaust silencer. Installing the silencer inside the enclosure will make the enclosure to tall for shipping. Can the silencer be mounted on the roof of the enclosure?

Shiping Equipment to the site is means and methods. This needs to be coordinated between the Contractor and the Equipment Manufacturer.

095 VDCI 26 32 13 2.6H

Requires motor operated dampers on the engine. Is it the intent to have these on the enclosure specified in paragraph 2.14?

These dampers need to be coordinated with the Equipment Manufacturer.

096 VDCI 26 32 13 1.1A Specifies the generators shall be TIER IV units that will be used for emergency power and peak shaving capabilities. Please clarify if these engines should be Tier IV final certified rated from factory or Tier IV compliant units to provide peak shaving capabilities?

The generators shall be Tier IV that will be used for emergency power and have peak shaving capabilities as called for in the contract Documents.

097 VDCI 26 53 00 2.1A

Section 265300 Neutral Grounding Resistors, page 2, 2.1 A. the amps rating of the NGR for each generator is not specified it just says ‘XXX’ amps. Please clarify the required amp rating of each 4160V (line to line), 2400V (line to neutral) NGR for each 2000 KW generator? Also, confirm duty cycle rating should be 10 Seconds/760C as underlined?

NGR must be 400A, 2400V with 10 seconds/760C duty cycle.

098 VDCI 26 32 13 2.1 C.2

Section 263213, 2.1 C. 2. Specifies engine generators shall have a Rated Power of 2000 kW (2500 KVA) CONTINUOUS rating. Please confirm if generators with a CONTINUOUS Rating of 1900 KW (2375 KVA) would also be acceptable? Provide Engine Rated Power of 2000kw and 2500 KVA as called for in the Contract Documents

099 VDCI E‐501

Drawing E‐501 under the generator and enclosure detail for each unit indicates the enclosure manufacturer will provide a connection point for a neutral grounding resistor. Please have the electrical engineer provide us with the amperage rating of this NGR and time rating for NGR trip we are to supply inside each generator enclosure? Also, please supply NGR rating and time trip for NGR to be supplied to protect the 30 KVA transformer inside generator enclosure?

NGR must be 400A, 2400V with 10 seconds/760C duty cycle. 30 Kva 480 ‐ 208Y/120V dry‐type transformer does not require NGR.

100 VDCI

26 23 13 1.1C E‐501

Drawing E‐501 specifies generator enclosure shall be rated 75 DBA at 25 feet from enclosure. Please confirm 75 dBA at 25 feet is correct level requirement as Section 263213, 2.14 C. has slightly different statement? Projvide 75 dBA at 25 feet

101 VDCI 26 32 13 3.2J

Section 263213, 3.2 item J. Parallel Operation Test please confirm this on‐site parallel operation testing of the generators can be performed using resistive type load banks only. Resistive style (1.0 pf) load banks are the industry standard for field testing of generators and what is seen most often. So we want to ensure load bank testing the generators in parallel via resistive load banks is sufficient?

Testing the Generators in Parallel via resistive load banks is acceptable

102 VDCI E101 Is there any information available on the generator connection box to be provided by the Government? Cut sheets? No information available

103 VDCI N/A

Are there any specs for Fuel (i.e., Low Sulphur)?

Fuel shall meet Maryland Department of Environment requirements for off road fuel buring equipment. Less than 15 ppm sulfur

104 VDCI N/A Are recent PM reports available for the existing CAP Banks to be relocated? We can assume they are in working order? THE bidder can assume the existing capacitor banks are in working order

105 VDCI N/A Who currently handles BAS/ATC/Fire Alarm for the facility? Please provide contact infromation not available

106 VDCI N/A Is there a pre‐decided area for Job site trailers, portable restrooms, and lay down areas? Contractor shall restrict all operations to within the project limit of disturbance

107 VDCI N/A Please clarify if this project is "Buy American" Yes ‐ reference FAR 52.225‐11 Buy American‐Construction Materials under Trade Agreements (NOV 2021)

108 VDCI N/A

Are badged contractors able to escort non‐badged employees?

All regular contract employees must apply for and obtain badges. Escort of employees on site for infrequent and short durations. i.e. delivery drivers, must submit to vehicle screening and be escorted by prime contractor personnel possessing a VA credential

109 VDCI N/A Please confirm access will be granted for all Non‐badged personnel for deliveries, services, and supplemental labor. Reference RFI 108_VDCI 110 VDCI N/A Will all Contractor Personnel on site be required to have a PIV Badge? Reference RFI 108_VDCI

001 JTS E‐501 Drawing provides details for switchgear, generator and fuel tank. Please provide the basis of design. Provide Generators and Swichgear as called for in the contract Drawings and specifications.

002 JTS 01 45 29

There are references in several places to Section 01 45 29, which is not provided. For example:

a. SF 1442 Page 21

b. 02 65 00 1.2

c. 03 30 53 1.2

d. 21 20 11 1.3

e. Elsewhere

Given the scope of work, specifications for testing of concrete and MV.

Request Section 01 45 29 be provided.

See provided specification 01 45 29

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

003 JTS

Several sections are referred to within Specifications but are omitted in the package, as follows

a. 01 42 19 (referred to on SF 1442 Page 20)

b. 01 74 19 (referred to on SF 1442 Page 20)

c. 25 10 10 (referred to in Section 26 32 13, Article 1.2)

d. 23 05 41 (referred to in Section 26 32 13, Article 2.7)

Request Sections be provided.

Delete Specification references Specification 01 74 19 provided

004 JTS SF 1442 Page 21 Is there a requirement for third party electrical testing for medium Voltage components? Related RFI #002

Follow specification 26 23 13 requirements.

005 JTS

Though there is a fuel piping system and other associated piping, there are no Sections provided for Divisions 22 and 23. Request that this be verified and that Sections be provided, as appropriate.

No, there is not. Each generator will have a sub‐base mounted fuel tank. Reference specification 26 32 13

006 JTS

∙ Gensets are defined as “Emergency Standby” ∙ Specs and drawing states gens to be “Tier IV” for emissions ∙ Initial vendor inquiries indicates that additional/extensive modifications will be required for equipment on rooftop of generator enclosure ∙ Tier 4 is not required for Emergency Standby gensets

Request verification of Tier IV requirement in specification. If Tier IV is required, will permitting with MDE be provided by VA?

Generators will be permitted for load shedding in peak shaving time periods by the VA through MDE.

Tier 4 compliant emissions profiles are required

007 JTS E‐501

The elevation view of the genset w/ enclosure on E‐501 shows a standard gen/enclosure layout. However, aftertreatment system for Tier 4 would require extensive equipment on rooftop of generator enclosure which are not shown. In general, the structure of the generator enclosure would differ significantly for this system

Assuming Tier IV is required (previous RFI refers), please provide additional details regarding gensets.

Each generator manufacturer knows the Tier IV enclosure requirements. E‐501 generator enclosure height will be adjusted by manufacturer.

008 JTS S101

S101 refers to detail F8/S101 which is not shown on this drawing. Bracing shall be installed along side locations similar to that shown on section D2/S101 (HBFA Response: S101 will be revised. Please take your best assumption for bidding purposes.)

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

009 JTS ES 103

Drawing ES‐103 shows the conduit size for the generator Neutral Grounding Resistors. Please provide online or riser drawing showing the Neutral Grounding Resistors connects.

The NGR must be located on the outside of the generator enclosure on the east side. Locate the NGR on the generator concrete pad increasing its dimensions as required by NGR manufacturer.

010 JTS 26 53 00 Para 2.1A

The amps rating of the NGR for each generator is not specified – instead it states ‘XXX’ amps.

In addition:

1.Please clarify the required amp ra ng of each 4160V (line to line), 2400V (line to neutral) NGR for each 2000 KW generator?

2.Confirm that the duty cycle ra ng should be 10 seconds/760C as underlined (in red).

NGR must be 400A, 2400V with 10 seconds/760C duty cycle.

011 JTS 26 23 13 Will contractor dispose of diesel oil which is in the existing tanks? Or will VA arrange prior to removals of tanks? Reference RFI 002_BRCon

012 JTS 05 12 00 Para 1.5 C. Section requires AISC certification of Steel Framing Installers. Since this applies primarily to only catwalks, will this certification be necessary?

Remove requirement for AISC Certification. Steel fabricator and installer shall have a minimum of 5 years experience and regularly fabricate and install Structural Steel Frmaing

013 JTS E601 Cable schedule #2 specifies copper conductors with an aluminum neutral. Please confirm. Provide what is called for on the construction documents 014 JTS ES 103 Please provide additional information regarding rerouted services to allow coordination of outages and other costs. Provide what is called for on the construction documents 015 JTS E‐102 Please provide as‐built one line drawing for PSWG. [Note 4] As builts are not available

016 JTS ES 103

Drawing ES‐103 states that there will be only 4‐hour outage for terminations. For safety reasons, this length time of time infeasible and will be driven by the overall schedule, which is to be developed during execution. More time will be needed to safely effect a final outage.

Is this open for discussion during execution?

Reference revised specification 01 00 00

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

017 JTS CU101 & ES102

Request fuel oil and laundry steam pipelines be verified and corrected, if appropriate.

Unmarked utilties represent steam and condensate piping approximately 4 feet below grade. Note A RFI drawing represents above ground steam, note b reperesnts above ground fuel oil piping

018 JTS E102 Note 5 shows two existing ATSs. There are actually four present. Please confirm whether all four are to be removed or identify the two to be removed. Remove all 4 automatic transfer switches located in building 321

019 JTS E‐101 Drawing shows ex ATS inside the generator enclosure, which was not found during site walk. Please verify. Provide what is called for on the construction documents

020 JTS E‐101

Detail indicates that generator enclosure is to remain. Request verify.

Existing generator enclosurers are to be removed

021 JTS ES101, E‐101 and E102

Following equipment are to be removed and disposed of:

1. Two ex capacitors

2. Existing switchgear

3. Two 2 MW gensets, equipment in enclosures

4. Two 1500 gal storage tanks

5. 310 kW generator, oil tank, equipment in enclosure

6. Ex ATS and paralleling switchgear

Request provide pick weights.

Weights are not available

022 JTS Technical Factors Technical Factor 4 requires that past performance be provided for at least three projects of similar size or scope performance within the past five years. Does the VA want to supply a format to allow COs or COTR’s for previous projects to comment? Submit past performance in contractor desired format

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

023 JTS Solicitation Page 21 of 82

States: “Contractor shall be designated as an operator under the project’s approved sediment erosion control and storm water management permits…. Refer to specification 01 57 19 Temporary Environmental Controls”

Section 01 57 19 is not provided.

Please provide section 01 57 19.

Will provide spec section 01 57 19

024 JTS 01 00 00 1.26

Without specificity, requirements for web‐based submittal tracking are provided.

Please provide provider and/or approximate cost. Provide web base submittal tracking

025 JTS 26 23 13

Section 26 23 13 references Section 25 10 10 which is not included.

Please provide Section 25 10 10.

Delete reference to spec Section 25 10 10

001 AM Vet N/A In which part (Technical, Past Performance, or Price) should the SF 1442 be placed? The SF‐1442 Should be placed to the front of your proposal 002 AM Vet N/A In which part (Technical, Past Performance, or Price) should the Offer Guarantee be placed? Price 003 AM Vet N/A In which part (Technical, Past Performance, or Price) should the Representations and Certifications be placed? Technical 004 AM Vet N/A In which part (Technical, Past Performance, or Price) should the EMR and OSHA Safety Information be placed? Past Performance 005 AM Vet N/A In which part (Technical, Past Performance, or Price) should the Contractor Certification be placed? Technical

006 AM Vet RFP Sec 1.5.1 RFP Pg 21

RFP Page 21, Section 1.5.1, Schedule, indicates that the submission shall “require a draft CPM schedule to be provided by contractor through a third‐party consultant.”

As third‐party consultant is very costly for this type of draft schedule, would the VA please consider allowing the schedule to be prepared in Microsoft Project (which will show critical paths) by the Contractor?

Strike requirement, preliminary schedule may be prepared by non‐third party agent. The requirement for a third party scheduling consultant during construction activities is unaffected, reference 01 32 16.15 Project Schedules

007 AM Vet RFP Sec 1.5.1 RFP Pg 21

In which part (Technical, Past Performance, or Price) should the Schedule be placed? Technical

008 AM Vet RFP Sec 1.5.1 RFP Pg 22

As there is no street address provided in Blocks 7 or 8 on the SF 1442, would the VA please provide the delivery address for the proposal submission The proposal submission was listed in amendment 5. All Proposals shall be emailed to Derrick.

Mincer@va.gov

009 AM Vet Evaluation Factors Page 2 The Factor 3 – Project Personnel Experience evaluation criteria reference meeting minimum experience, education, training and certificate requirements “as defined below”, however, there are no requirements provided. Would the VA please provide the minimum requirements?

Page 12 of the RFP does not define the Project Personnel Experience evaluation criteria meeting the minimum experience, education and training requirements

010 AM Vet Evaluation Factors Page 2 The Factor 3 – Project Personnel Experience evaluation criteria reference meeting minimum experience, education, training and certificate requirements “as defined below”, however, there are no requirements provided. Would the VA please provide the minimum requirements?

Page 12 of the RFP provides the three paragraphs for the requirements below

011 AM Vet 01 00 00 Para 1.23

Spec section 01 00 00 1.23 PHOTOGRAPHIC DOCUMENTATION directs the GC to provide services to have progress photos taken. To reduce costs would the VA allow aerial drones to be used to take pictures of the same quality to reduce monthly rates.

Yes, contractor bears responsibility for proper licensing and insurance of drone operations

012 AM Vet 01 00 00 Para 1.22 SAFETY

SIGN

Spec section 01 00 00 1.22 SAFETY SIGN directs the GC to purchase install a Wood framed Safety Sign. To reduce costs and to reduce natural resources would it be acceptable to have a canvas sign of the same measurements containing the same information and contents. This can be placed on the construction fence at the same height.

No, match specifcation requirements

013 AM Vet 01 00 00 para 1.3 Spec section 01 00 00 1.3 contains 2 bid items when the solicitation document only contain 1. Can the VA provide a better description of each Bid Item 1 and 2 contained in the specification?

Reference revised specifciation 01 00 00

014 AM Vet 02 65 00 Spec SECTION 02 65 00 STORAGE TANK REMOVAL is for underground storage tank removal. Can the VA provide a spec for above ground storage tank removal. Utilize specifciation 02 65 00 for above ground storage tank removal requirements

015 AM Vet 26 32 13 para 1.1.A Section 263213, 1.1 A. specifies the generators shall be TIER IV units that will be used for emergency power and peak shaving capabilities. Please clarify if these engines should be Tier IV final certified rated from factory or Tier IV compliant units to provide peak shaving capabilities?

Generators are required to be tier 4 016 AM Vet 26 32 13 1.1.A Tier 4 will add cost to genset plus additional enclosure requirements. Generators are required to be tier 4

017 AM Vet 26 53 00 Page 2, 2.1.A Section 265300 Neutral Grounding Resistors, page 2, 2.1 A. the amps rating of the NGR for each generator is not specified it just says ‘XXX’ amps. Please clarify the required amp rating of each 4160V (line to line), 2400V (line to neutral) NGR for each 2000 KW generator? Also, confirm duty cycle rating should be 10 Seconds/760C as underlined? NGR must be 400A, 2400V rated with 10 second duty cycle.

Pre‐Bid Request for Information Responses Dated 5‐31‐2022

RFI # Submitted BY Spec / Drawing Reference Request

Response

018 AM Vet 26 32 13 2.1 C.2 Section 263213, 2.1 C. 2. Specifies engine generators shall have a Rated Power of 2000 kW (2500 KVA) CONTINUOUS rating. Please confirm if generators with a CONTINUOUS Rating of 1900 KW (2375 KVA) would also be acceptable? Provide generators and called for in the contract documents

019 AM Vet E‐501 Drawing E‐501 under the generator and enclosure detail for each unit indicates the enclosure manufacturer will provide a connection point for a neutral grounding resistor. Please have the electrical engineer provide us with the amperage rating of this NGR and time rating for NGR trip we are to supply inside each generator enclosure? Also, please supply NGR rating and time trip for NGR to be supplied to protect the 30 KVA transformer inside generator enclosure?

NGR must be 400A, 2400V rated with 10 second duty cycle. 30 kVA Dry‐Type 480‐208Y/120V does not require an NGR.

020 AM Vet 26 23 13 1.1 C

Drawing E‐601 shows a quantity of five (5) 2MW, Tier IV generators with a note next to Generator ‘G5’ that this generator is part of future scope and not part of this pricing. Section 262313, item 1.1 C. of the Generator Paralleling Controls however has a contradictory statement that says five (5) engine generator sets (2 new, 3 future). Please clarify if we are to follow the drawing and provide pricing for four (4) generators now and then fifth generator is future only not part of this current scope?

The design requires 4 new generators and provisions in the new switchgear for a future 5th generator.

021 AM Vet 26 32 13 2.14 C Drawing E‐501 specifies generator enclosure shall be rated 75 DBA at 25 feet from enclosure. Please confirm 75 dBA at 25 feet is correct level requirement as Section 263213, 2.14 C. has slightly different statement? Provide dBA Rating as required by specification.

022 AM Vet 26 32 13 3.2 Item J Section 263213, 3.2 item J. Parallel Operation Test please confirm this on‐site parallel operation testing of the generators can be performed using resistive type load banks only. Resistive style (1.0 pf) load banks are the industry standard for field testing of generators and what is seen most often. So we want to ensure load bank testing the generators in parallel via resistive load banks is sufficient? Resistance type load banks are acceptable.

023 AM Vet E‐501 The elevation view of the genset w/‐ enclosure on E‐501 shows a standard gen/enclosure layout.

1. After treatment system for Tier 4 will require extensive equipment on rooftop of gen enclosure.

2. Design/structure of gen enclosure will be different for this system. Provide tier 4 as called for in the contract documents

024 AM Vet General 2.1 C.1 Other than Gen Spec 2.1C.1, there is no other reference to Tier 4 Emissions in the Spec. Non in Enclosure or Exhaust Section. Provide tier 4 as called for in the contract documents 025 AM Vet N/A Will all Contractor Personnel on site be required to have a PIV Badge? Reference RFI 108_VDCI 026 AM Vet N/A Please confirm access will be granted for all Non‐Badged personnel for deliveries, services and supplemental labor. Reference RFI 108_VDCI 027 AM Vet N/A Are badged contractors able to escort non‐badged employees? Reference RFI 108_VDCI

028 AM Vet N/A Please clarify if this project is “Buy American”.

Yes ‐ reference FAR 52.225‐11 Buy American‐Construction Materials under Trade Agreements (NOV 2021)

029 AM Vet N/A Is there a pre‐dedicated area for job site trailers, portable restrooms, and laydown areas? Contractor shall confine operations and storage within the project limit of disturbance 030 AM Vet N/A Would the VA please provide contact information for who currently handles BAS/ATC/Fire Alarm for the facility? Unavailable 031 AM Vet N/A Are recent PM reports available for the existing Cap Banks to be relocated? Please confirm they are in working order. Unavailable

032 AM Vet N/A Are there any specs for Fuel (i.e. Low Sulphur?)

Fuel shall meet Maryland Department of Environment requirements for off road fuel buring equipment. Less than 15 ppm sulfur

033 AM Vet E101 Is there any Information available on the Generator connection box to be provided by the Government? Cut Sheets?

The generator connection box is provided by the contractor. The portable generator is provided by the Government.

034 AM Vet N/A Is it possible to re‐use existing fuel? existing fuel is not to be used

035 AM Vet N/A Are there any specs/guidelines for “fuel polishing?”

Fuel polishing systems sahll polish all fuel in a 24 hour period, remove all water and particulate to 30 micron.

036 AM Vet N/A Would the VA please provide contact information for the Site Utility Power provider? BGE is the site utility provider 037 AM Vet N/A No detail is provided for concrete encased duct bank. Would the VA please provide detail to include steel (rebar), if required? Steel rebar is not required

038 AM Vet N/A 4‐hour outage maximums may be an issue, considering time for LOTO, MV splices, and re‐energizing (bringing systems back on line.)

Outages will be coordinated per specification 01 00 00, a maximum qty of (2) 8 hour outages will be permitted for final connections

039 AM Vet N/A There are subbase fuel tanks shown on the drawings, however, the specification for the generators does not mention any subbase fuel tanks. Please provide a spec for the fuel tanks. Provide belly type fuel tanks as called for on sheet E‐501

040 AM Vet N/A Please clarify if day tanks are required. There are multiple references to fuel levels at main tank and day tank in the generator spec Day tanks are not required. Base belly tanks are to be provided as indicated.

041 AM Vet N/A The generator enclosure calls for 2 different sound ratings at different distances. 85dBA @ 5 ft from the top. Provide 75 dBA at 25 feet 042 AM Vet 2.6.H Please clarify if the motor operated dampers in 2.6.H are intended to be included in the generator enclosure paragraph 2.14. Motor operated dampers must be included in the generator enclosure.

043 AM Vet 2.14.E.5 2.14.E.5 calls for an internal muffler, however, the spec calls for Tier 4 generators. Please confirm roof mounted emissions package is acceptable. Installing these components inside of the enclosure will make it too tall to ship from the enclosure manufacturer. Provide tier 4 as called for in the contract documents

044 AM Vet N/A Please confirm the location for the urea tank, controller and other related emissions control components.