PPIs Attachment_FINAL.pdf

Pre-Proposal Inquiry Responses:

Question: 180

SCADA Section 26 70 00 2.1.4(a) (1)

It appears that the Master SCADA Station located at Building 900 will be able to control and monitor the new substations at DD4 and Pier 3. Do we need to upgrade or reprogram the existing Master SCADA?

Answer:

NO

Question: 181

CD-105 General Note 3 and Key Note 3

Are the contractors to assume that the FH is to be removed and stored onsite, then remove the existing piping below deck, then install new piping below deck in a new arrangement, then re-install existing FH at the same location? Shall we assume to leave the section of pipe through the deck intact during construction? Or is this new vertical section of pipe to also be removed and replaced with new pipe?

See attached revised CD105 and CS105. Provide all new materials. See attached Drawings

Question: 182

Can you please provide the exact location for the quay wall between Pier 3 and both DD4 and DD5?

See uploaded attachment.

Question: 183

The Electric drawings don’t take in consideration the structure of Pier 3, there are a lot of obstructions under the pier, there are no details for how to run the conduits either through or around the Pier beams, the crossing tunnel, Pier Deck, etc.; can you please provide such details? The Electric drawings don’t take in consideration the structure of Pier 3, there are a lot of obstructions under the pier, there are no details for how to run the conduits either through or around the Pier beams, the crossing tunnel, Pier Deck, etc.;

can you please provide such details?

Routing of conduit is contractor “means and methods” and do not require details. Drawing previously provide

Question: 184

Per the feeder schedule on sheet E-527 indicates new feeder 428 to be (3) 500kcmil (1)250kcmil conductors. However the manhole foldouts for 332,295, 294, 293 333 indicate feeder 428 to be a parallel feeder.

Will the government please confirm which is correct?

Feeder 428 is a parallel set. Refer to revised sheets E-527, E-785, E-787, E-789, E-806, and E-808 for updated information.

Question: 185

Please provide a drawing to show where feeder 4004-3C cubicle is located in substation E.

Refer to sheet ES104, revision #2.

Question: 186

Drawings ES101 through ES103 indicate three locations where four conduit duct banks are to be installed and one where a 9-conduit duct bank is to be installed. Drawing E-301 does not detail the duct bank section for four or nine conduits. Please clarify

Refer to revision 2 on sheets ES101, ES102, and E-302, which addresses these.

Question: 187

Drawings CS102 in the bottom left hand of the drawing shows a call-out of note 2 just south of EMH 906.

This would indicate a portal crane rail crossing. Please clarify.

Contractor to route underneath portal crane rail infrastructure. At this particular location, this is a portal crane rail switch.

Question: 188

Drawings ES105 near the top, shows substation 3C with 5 conduit runs coming in from the east. The conduit lines stop at the fence / containment boundary line and there is no detail of what the conduit sizes are for each of the branches coming off of the (34) 5”C coming down from EMH#345 on Drawing

ES104. Please clarify.

Site plan sheet scale was too large to depict all five conduit runs inside the substation area. Refer to enlarged plan sheet E-415 for more information on these conduit runs.

Question: 189

Drawings ED-105 & ED-106

On Drawings ED-105 and ED-106, you show sheet keynote #3 and keynote #1 respectively, which state to demolish existing cables. However, the symbol used for this removal under the symbols and abbreviations shown on E-001 calls for us to “Remove existing electrical cable and/or conduit.” Please confirm that we are only required to remove the cables as shown on Drawing ED105 sheet keynote #3 and not the conduit.

According to appropriate CLIN number and keynotes, demolish both cables and conduits (feeders) at each location

Question: 190

Drawing CS-402

On Drawing CS-402, please confirm if the design intent is to demolish and re-install new Storm Drain

Catch Basin #F/49-16 with new with Oil Water Isolation equipment in the sump? Or is the intent to simply add the Oil Water Isolation components to existing Catch Basin #F/49-16?

The Contractor shall install a new Oil Water Isolation with sump catch basin as shown in Substation 43C on /CS402 and route the storm pipe to tie into the existing storm catch basin #F/49-1. See revised drawings titled 161_164_DD4_Civil PPIs _2.2.25.20 provided in Amendment 0007.

Question: 191

Drawing CS-403, Detail A3

On Detail A3 of Drawing CS-403, please confirm Water Line re-route at Substation 3A is to be routed below the Pier Deck. There is a note at the Storm Drain just to the West directing the contractor to route pipe under deck, but this note appears to be missing from the water line.

Contractor to re-route water line below the pier deck north of Substation 3A as shown on A3/CS403.

Question: 192

Drawing CS-501, Details C4, C2, and A2

On Drawing CS-501, details C4, C2, and A2, you show a section of structural fill to be placed below slabs and surface restorations, yet you do not show a depth. Please provide the thickness you wish us to use in placement of the structural fill section.

Structural fill must be used in trenches and underneath crushed surfacing base course as needed to fill the over-excavation areas.

Question: 193

Drawing CS-505, Details C1 and B1

On Drawing CS-505, details C1 and B1, we see no reference to these details on Drawings CS-101 to CS-

103. Unless told otherwise, we are going to assume these details are not required in this project.

See General Note #3 on CS101-CS103, “Contractor to utilize details A1, B1, and C1/CS505 pavement restoration to match existing conditions where applicable.” Also, refer to the civil legend on C-001 for the defined pavement hatches.

Question: 194

Drawing ES-104 to ES-106

On Drawings ES-104 to ES-106, we are required to install a duct bank system below Pier 3. Please provide the pile support system layout for this Pier so we may determine access and support requirements.

As Built 112_166__167_T3 was provided in Amendment 0007.

Question: 195

Drawing ES-104 to ES-106

On Drawings ES-104 to ES-106, we are required to install a duct bank system below Pier 3. Please provide structural section drawings of this Pier so we may determine support systems layout. Are there pile caps below the pier or is it a flat bottom deck? Also, please provide existing elevations of this structure so we may determine tide impacts on our conduct installations.

As Built 112_166__167_T3 was provided in Amendment 0007.

Question: 196

Drawing ED-105

On Drawing ED-105, there are existing Cable Tray runs from (E) Substation 3A to 3B7 C-2-3A and C-1-

3A shown for removal. Please confirm if the removal is simply the conductors on the tray or includes the tray itself.

Demolish existing cable tray, conduits, and conductors connected to existing connection boxes as indicated. As indicated on drawing.

Question: 197

On Drawing ED-105, between the two Cable Trays exiting the East side of (E) Substation 3A is a 3rd line shown for demolition. Is this also a cable tray or conduit? This line is unlabeled but also runs to 3B7 C-2-

3A and C-1-3A. Please also confirm if removal is simply the conductors on the tray or in conduit or includes the Tray/Conduit itself.

indicated. As indicated on drawing.

Question: 198

On Drawing ED-105, coming out of the south side of Substation 3A are two unlabeled lines shown for demolition. Please confirm if these are cable tray or conduit and if the removal is just for the conductors or also includes tray/conduit

Each line represents the conduits. Refer to ED413, ED413A, E-413, and E-413A.

Question: 199

On Drawing ED-105, coming out of the west side of 3B7 C-2-3A and C-1-3A is a 2-inch Conduit line shown for demolition. Please confirm if removal is simply the conductors on the tray or in conduit or includes the Tray/Conduit itself.

indicated. Demolish existing connection boxes as indicated.

Question: 200

Drawing ED-306

Please confirm that the lights shown for removal at these three service galleries are the limit to the light removal within all service galleries (2 each lights per the 3 locations for total of 6 each). If not, please provide a quantity or at least the spacing of lights within the galleries to be removed.

Sheet ED306 represents the full extent for the demolition of light fixtures in the gallery tunnels. Refer to sheet E-306 for more information. Refer to specification 26 20 00 and general note 2 on sheet E-001 for existing systems.

Question: 201

Drawing ED-306

Please confirm the hatching shown on the 2-inch FG, 2-inch C, and 2-inch FGC lines intentionally indicates to remove short sections of these conduits to provide space/access, or if this hatching is shown erroneously.

Demolition hatching confirmed.

Question: 202

Spec 26 23 00 (2.3.2.1 – a) requires the enclosure of the switchgear to be NEMA 3R. Can you confirm that 3B-2 and 3B-3 are acceptable as NEMA 1? Drawing E414 shows substations 3B-2 and 3B-3 inside of a building. Is the 4000 busway outdoor rated?

The Government has no exception for NEMA 1 for indoor switchboards.

Question: 203

Drawing ED414 notes (9), AMI meters on the east wall that most likely monitor the feeders in substation

3B. Can you confirm we are to abandon those meters?

Demolish existing AMI system at substation 3B—AMI meters no longer in use. See attached revised drawing ED - 414.

Question: 204

The construction sequence of this project includes many cutover outage activities as well as outage activities for demo and installation work in existing vaults. The contract documents do not provide information regarding items that would require temporary or portable power during outages. Please confirm that there is no requirement for temporary or portable power during outages, or provide information on the quantity, size, type, electrical connection method, and other details required for the contractor to be able to quantify these costs.

See Amendment 3

Question: 205

Specification 01 30 00 1.5 specifies the minimum workers compensation insurance coverage. Please confirm if the scope of this project shall be covered under the USL&H (Longshore and Harbor Workers

Compensation Act), and longshoreman insurance coverage required.

“Contact your Surety for the requirements of Longshoreman/Marine/Maritime insurance.”