NHSA H-5 newsletter header

February 26, Volume XXIV

Construction update

During the past two weeks, the Authority has been working with PSE&G to locate the new transformer to the west of the Authority’s existing 11th Street Pump Station. The transformer will not be installed in the 11th Street Island on Maxwell Place property. The Authority and City are coordinating with PSE&G to locate the transformer adjacent to the existing 11th Street Pump Station west of Hudson Street. The contractor has been working on the connection chamber and the emergency generator. The contractor is continuing to install reinforcing steel and concrete for the pump station connection chamber. Additionally they have completed installing the concrete openings for the main pumps and completed installing the emergency generator electrical conduits and placed 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 starting on the outfall to obtain access for construction operations and any repairs that may be required prior to construction of 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.

Later in the Spring of 2016, the excavation for the transition vault (see below diagrams) will begin. 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, 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 previously reported in the newsletter (September 18, 2015, Volume XI), the completion of the control vault foundation during the week of September 14th sealed off any contaminated soils at that location. The pumping station foundation slab has also sealed off any contaminated soils at that location. Air monitoring of the site, as directed by the LSRP, began on August 27th and continues.

 

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 week, 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: 174
  • Construction submittals reviewed: 164
  • Construction submittals approved: 163
  • Submittals not subject to review (for information only): 11

The following construction submittals were reviewed the week of February 22nd, 2016.

  • Soil sampling, analysis, and classification
    CSO pipeline
  • Precast concrete panels
  • Process valves and operators
  • O&M manuals

The following is a recent picture of the emergency generator west of Hudson Street on the 11th Street Island.

 


Top slab pump station

(Click image above for a larger view)


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 March 1st, these activities will include the following continuation of work underway and reported in previous newsletters:

  • Next week at the 11th Street Pump Station we anticipate continuing the installation of the emergency generator, the electrical service, and completing the plumbing for the natural gas to the emergency generator.
  • The contractor will continue to work on the mechanical for the control vault and continue the concrete and reinforcing steel for the pump station connection chamber.
  • The contractor will continue the construction inspection and plan for any repairs to the outfall prior to construction of the transition vault.
  • The contractor will continue to have a water truck available to abate dust and soil and 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.

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.