NHSA H-5 newsletter header

April 12, Volume XXVI

Construction update

The Contractor is working on the CSO weir/connection chamber next to the pump station and is continuing the excavation for the transition vault, grade-beam and concrete connection to the CSO outfall.

 

In the last two weeks, the Contractor has completed the following activities:

  • Pump station — The Contractor installed the concrete structure, the handrails and ladders, the vortex breaker (which is used to direct flow into the pumps) and placed the concrete sloped floor and the stop logs in the pump station connection chamber.
  • Transition vault — The Contractor installed the eastern section of the transition vault temporary sheeting and whaler system (structural braces inside the sheeting) and began excavating the trench.
  • NHSA 11th Street pump station — The Contractor installed the emergency generator and conducted initial start-up of the unit.

As outlined in the previous newsletter, the Contractor has temporarily closed down the exterior sidewalk to pedestrians for public safety. Only the exterior sidewalk is affected. The interior sidewalk (under the building overhang) is available and useable at all times. The plan for the closure of the sidewalk is described below. The exterior sidewalk will be put back into service as soon as possible.


Pedestrian traffic control plan

Pedestrian Traffic Control Plan –
1025 Maxwell Place Building

(Click image above for a larger view)


In order to accomplish these activities the Contractor had to remove four trees and one light pole to install the transition vault and make the connection on Maxwell Place. PSE&G is responsible for disconnecting the light pole and coordinated that work with the HOA. The trees will be replaced with similar size trees and the light pole reconnected as soon as practical.


Tree and light pole

Tree and light pole replacement
(Click image above for a larger view)


The Contractor completed installing the emergency generator on the 11th Street Island west of Hudson Street.

 
As previously stated, the backfill has been completed around the pump station perimeter and work is nearing completion on the connection chamber and beginning on the transition vault. At the control vault location, the Contractor installed the two (2) condenser units on top of the concrete pad and the refrigerant piping between the condenser units and the air handling units. Once final grades are completed, this equipment will be as previously provided during the meetings with the HOA. The area will also be re-landscaped to hide the equipment.

The diagrams below, which were shown in the previous newsletter, depict the transition vault. The transition vault, which is immediately adjacent to the pump station excavation, is separate from the control vault and the pump station. The first diagram below depicts the three (3) main below grade elements of the pumping station. These three elements are: 1) the weir and connection chamber, which allows the wet weather overflows to enter the pump station during storm events; 2) the pump station; and 3) the transition vault over the CSO outfall, which pumps wet weather flow back into the outfall during storm events. The second figure shows the location of the below ground transition vault at street level looking west on 11th Street.

Transition vault schematic

(Click image above for a larger view)

Transition vault street level


As shown in previous newsletters, the project’s three (3) phases are dictated by the engineering and construction requirements and will occur in three areas along 11th Street, as seen in the figure below. The three phases are: 1) the construction of the wet weather pump station; 2) the construction of the control vault; and 3) the installation of the emergency generator.


Construction map

(Click image above for a larger view)


Latest construction activity

During the last two weeks, construction submittals from the Contractor continue to be reviewed and processed by NHSA engineers. The Contractor continues to work on the emergency generator at the NHSA island between Hudson and Washington Streets. The following is a summary of the construction submittals processed to date:

  • Construction submittals received: 184
  • Construction submittals reviewed: 179
  • Construction submittals approved: 175
  • Submittals not subject to review (for information only): 11

The following construction submittals were reviewed the week of April 4th, 2016.

  • Detailed progress schedule
  • Precast concrete panels
  • O&M manuals for mechanical and electrical equipment, pumps, generator and control panels

Coming up

In the next two (2) weeks, the Contractor will continue to prepare submittals and obtain approvals for construction activities. Going forward into the week of April 11th, these activities will include the following continuation of work underway and reported in previous newsletters:

  • Complete excavation and install the grade beam and concrete collar reinforcing steel under the existing CSO at the transition vault.
  • Perform miscellaneous mechanical work at the pump station.
  • Disconnect the temporary emergency generator and connect the new emergency generator to the existing ATS at the 11th Street pump station.
  • The Contractor will continue to work in the excavation of the transition vault.
  • The Contractor will continue the installation of the transformer and electrical service.
  • The Contractor will continue the construction of the control vault mechanical.
  • The Contractor will continue to have a water truck available to abate dust and soil an erosion controls to prevent the migration of dust from the construction area.
  • The Licensed Site Remediation Professional (LSRP) air monitoring program continues in place.

LSPR update

The LSRP’s recent activities include:

  • Air monitoring of the site began on Thursday, August 27th and continues, in accordance with the LSRP-approved plan.
  • The air monitoring readings are continuing. Daily updates are being sent to the HOA and the weekly updates are being posted on the NHSA website.

Overall construction schedule

The current overall construction schedule remains as follows:

  • Pre-construction activities: Completed as scheduled.
  • Construction activities, now underway: Mid-August through December. This includes work on the installation of control vault and pump station. The emergency generator on North Hudson’s existing 11th Street pump station island between Hudson and Washington Streets will also be constructed once the transformer and generator are procured.
  • LSRP monitoring begins with construction and ends when the cap is restored.
  • Control vault construction continues until April 2016.
  • Pump station construction continues until August 2016.
  • Final completion and site restoration is scheduled for October 2016.

Role of the LSRP

The LSRP serves an extremely important function in the construction of the H-5 WWPS. He will oversee all environmental issues on the site, including the voluntary air monitoring that North Hudson is undertaking. In this capacity, the LSRP is responsible to the NJDEP for ensuring that all construction is done in accordance with the Remedial Action Plan filed with the State during the original development of Maxwell Place. The contractors will take no steps that impact the environment without the strict oversight of the LSRP. The LSRP will report on a regular basis to the NJDEP.

 

Because Maxwell Place was constructed on land that was remediated for soil and groundwater contamination, an NJDEP-approved engineered cap was placed within the development and along 11th Street. The construction of the WWPS will lift minimal parts of the cap in carefully defined areas, and the LSRP will develop a Data Collection Plan to strictly supervise and control all related construction activities. No construction that impacts the existing cap can be undertaken without the approval of the LSRP.

 

The LSRP will also supervise the gathering of air samples adjacent to the construction, as part of North Hudson’s voluntary air monitoring program. The LSRP will oversee the air quality data collection and provide advice before construction begins, during excavation and until the cap is replaced.

 

The recent air monitoring data can be found on the NHSA website.

auto and pedestrian

Sidewalk and auto access

This is the most current information and will be updated going forward.

 

Sidewalks

South sidewalk on 11th Street: Open at all times.

East sidewalk on Sinatra Drive North: Maintain drop-offs for school.

North sidewalk on 11th Street: Brief intervals of closure between Sinatra Drive North and Hudson Street (during construction of the transition vault).

East and west sidewalk at Maxwell Lane: Maintain access for drop-offs to daycare.

 

Traffic

 

Uninterrupted access to parking garage.

Eastbound traffic lanes 11th Street: Short temporary closures during utility relocation; both lanes closed during pump station construction between Maxwell Lane and Sinatra Drive North. Open at all times from Maxwell Street to Hudson Street.

Westbound traffic lanes 11th Street: Temporary closures for traffic relocation between Maxwell Lane and Hudson Street. Both lanes closed during pump station construction from Maxwell Lane to Sinatra Drive North.

 

Parking

 

No street parking during construction hours between Maxwell Lane and Hudson Street.

No street parking on 11th Street from Hudson Street to Sinatra Drive North (Eastbound).

 

Effect on local businesses

 

Sidewalk access permits unimpeded foot traffic to local businesses.

Traffic controls at site will minimize business impact.

Drop-off point will be maintained during construction.

Parking access may have
limited effect.

Parking garage access remains in place.

Restrictions on street parking will be impacted during construction.

 

auto and pedestrian

Air monitoring

Although the NJDEP does not require air monitoring for the H-5 WWPS project, North Hudson is voluntarily monitoring the air surrounding the construction site for dust and volatile organic compounds (VOCs). The LSRP will continuously monitor the air during excavation activities and until the original cap has been replaced. This is a relatively conservative approach, as it is designed to alert the construction team whenever dust is in excess of the LSRP monitoring plan. Readings that show elevated levels of dust or VOCs in the air will result in review and remedial action to abate the condition as approved by the LSRP. Our e-newsletter will provide regular summaries of the air monitoring activities, and the website (nhudsonsa.com) will post daily readings.

Telephone

Contact us

You can contact us 24/7 at our dedicated number: 866.689.3970. The Resident Engineer, who is overseeing the construction, will normally be on site during construction hours, Monday through Friday, 8:00 a.m to 4:30 p.m.