The Supplemental Pre-Design Investigation field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the advancement of soil borings to gather information required to determine the design parameters of the interim remedial measure at the 50 Kent Avenue parcel of the Williamsburg Works MGP Site.
Activities Week of March 25 – March 29, 2013
Performed hand clearing of planned soil boring locations.
Future (Two Week Look-Ahead) Activities
Advance soil borings to collect geotechnical data and visually log MGP materials.
Weekly Update, Week Ended April 05, 2013
Williamsburg Works Interim Remedial Measure
The Supplemental Pre-Design Investigation field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the advancement of soil borings to gather information required to determine the design parameters of the interim remedial measure at the 50 Kent Avenue parcel of the Williamsburg Works MGP Site.
Activities Week April 1 – April 5, 2013
Installed soil borings to collect geotechnical data and visually log MGP materials.
Future (Two Week Look-Ahead) Activities:
Continue installing soil borings to collect geotechnical data and visually log MGP materials.
Weekly Update, Week Ended May 03, 2013
Williamsburg Works Interim Remedial Measure
The Supplemental Pre-Design Investigation field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the advancement of soil borings to gather information required to determine the design parameters of the interim remedial measure at the 50 Kent Avenue parcel of the Williamsburg Works MGP Site.
Activities Week April 29 – May 3, 2013
Removed the soil generated during the investigation for offsite disposal. Boring locations and other site features were surveyed.
Future (Two Week Look-Ahead) Activities:
No activities planned.
Weekly Update February 2014
Williamsburg Works Interim Remedial Measure
National Grid will begin an Interim Remedial Measure (IRM) for a portion of the former Williamsburg Works Manufactured Gas Plant (MGP) Site, located at 50 Kent Avenue, in Winter 2014. The property is owned by the New York City Department of Parks & Recreation. Predecessor companies to National Grid operated the MGP, making National Grid responsible for remediating the property to a level protective of public health and the environment.
The IRM includes the installation of recovery wells around the perimeter of 50 Kent Avenue and a large scale excavation of MGP contaminated soil on the parcel, so that the property can be redeveloped by NYC Parks. Recovery well installation will begin during the winter months of 2014, and the excavation component will begin in the winter of 2015.
The IRM is being completed under an Order-on-Consent between the New York State Department of Environmental Conservation (NYSDEC) and National Grid dated February 2007. The Order requires National Grid to investigate, and where necessary, remediate former MGP sites, including the former Williamsburg Works MGP. The IRM is being performed under the oversight of the NYSDEC and the New York State Department of Health (NYSDOH). IRMs are approved when a portion of a site can be remediated, removing an easily accessible hazard or, as in this case, facilitating redevelopment, without affecting an eventual Remedial Action Plan for other portions of the former Williamsburg Works MGP site.
For more information, please call our hotline at (718) 403-3053.
Weekly Update March 7 2014
Williamsburg Works Interim Remedial Measure
NAPL Recovery Wells
The non-aqueous Phase Liquid (NAPL) Recovery Well installation and development field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the installation of recovery wells to recover coal tar at the 50 Kent Avenue property of the Former Williamsburg Works MGP Site.
Activities Week March 3 – March 7, 2014
Commence with soft digging/pre-clearing of proposed well locations to 5 feet below ground both onsite and on North 11th Street.
Future (Two Week Look-Ahead) Activities
Continue soft dig/pre-clearing activities along North 12th Street and onsite for each proposed well location. Pre-Clear and expose inactive gas line in vicinity of NRW-07 on North 12th Street. . Mobilize drill equipment. Begin drilling activities concurrently with pre-clearing activities. Perform community air monitoring and PID screening.
Weekly Update March 28 2014
Williamsburg Works Interim Remedial Measure
NAPL Recovery Wells
The non-aqueous Phase Liquid (NAPL) Recovery Well installation and development field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the installation of recovery wells to recover coal tar at the 50 Kent Avenue property of the Former Williamsburg Works MGP Site.
Activities Week March 24 – March 28, 2014
Continued drilling at well locations on North 12th Street and onsite. Installed five (5) wells (NRW-08, NRW-12, NRW-13, NRW-03, and NRW-04) at these locations.
Future (Two Week Look-Ahead) Activities
Continue drilling activities onsite and on North 12th Street. Begin well development and perform community air monitoring and PID screening.
Weekly Update April 4 2014
Williamsburg Works Interim Remedial Measure
NAPL Recovery Wells
Continued drilling at well locations on North 12th Street and onsite. Installed four (4) wells (NRW-05, NRW-06, NRW-07, and NRW-09) at these locations. Began developing wells on North 11th Street and onsite.
Activities Week March 31 – April 04, 2014
Commence with soft digging/pre-clearing of proposed well locations to 5 feet below ground both onsite and on North 11th Street.
Future (Two Week Look-Ahead) Activities
Complete drilling activities on North 12th Street. Complete well development and perform community air monitoring and PID screening.
Weekly Update April 4 2014
Williamsburg Works Interim Remedial Measure
NAPL Recovery Wells
The non-aqueous Phase Liquid (NAPL) Recovery Well installation and development field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the installation of recovery wells to recover coal tar at the 50 Kent Avenue property of the Former Williamsburg Works MGP Site.
Activities Week April 7 – April 11, 2014
Continued drilling at well locations on North 12th Street. Completed all well drilling activities. Completed developing wells on North 12th Street.
Future (Two Week Look-Ahead) Activities
Off-site disposal of soil from roll-offs and liquid from storage tanks to appropriate disposal facilities.
Weekly Update April 18 2014
Williamsburg Works Interim Remedial Measure
NAPL Recovery Wells
The non-aqueous Phase Liquid (NAPL) Recovery Well installation and development field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the installation of recovery wells to recover coal tar at the 50 Kent Avenue property of the Former Williamsburg Works MGP Site.
Activities Week April 14 – April 18, 2014
Prepared samples for analysis and characterization of liquid and soil for off-site disposal. Surveyed well locations.
Future (Two Week Look-Ahead) Activities
Off-site disposal of soil from roll-offs and liquid from storage tanks to appropriate disposal facilities. Demobilize all material and equipment from site.
September 2015 Update
The Interim Remedial Measure (IRM) work is set to begin, which will address the contamination related to the site at Kent Ave & 12th Street.
A public meeting will be held on September 29, 2015 to discuss the cleanup activities and what the community can expect throughout the duration of the work. The meeting will be held at 6:30pm at the Bushwick Inlet Park Headquarters at Kent Ave. and N. 9th St. in Brooklyn.
The goal of the cleanup is to achieve levels that protect public health and the environment. The cleanup action for the site includes:
- Excavation and off-site disposal of two gas holder foundations and associated coal tar-contaminated soil to an approximate depth of 25 feet;
- In-situ stabilization/solidification (ISS) of one of the gas holder foundations and its contents;
- Installation of recovery wells immediately outside the 50 Kent Ave. parcel in the street rights of way to collect non-aqueous phase liquid (NAPL) which lies beyond the boundaries of the excavation; and
- Soil on the remainder of the 50 Kent Ave parcel will be excavated to the water table, approximately 5 feet below ground surface, and disposed off-site. The site will then be returned to approximately its existing grade. A soil cover, consisting of a minimum of two feet of soil meeting Restricted Residential Soil Cleanup Objectives, which also allows for active recreational use, will be placed across the entire site.
On-going and future work at the Site includes:
- Ongoing biweekly non-aqueous Phase Liquid (NAPL) gauging and recovery at wells on North 11th and North 12th Streets; and
- Installation of piezometer in the sidewalk on the west side of Kent Avenue, between North 11th and North 12th Streets scheduled for Friday September 25, 2015.
The full fact sheet detailing this work can be found under the Key Documents tab or by clicking here.
October 2015 Update
The Interim Remedial Measure (IRM) work is set to begin, which will address the contamination related to the site at Kent Ave & 12th Street.
A public meeting was held at the Bushwick Inlet Park Headquarters on September 29, 2015 to discuss the cleanup activities and what the community can expect throughout the duration of the work.
The goal of the cleanup is to achieve levels that protect public health and the environment. The cleanup action for the site includes:
- Excavation and off-site disposal of two gas holder foundations and associated Non- Aqueous Phase Liquid (NAPL)-contaminated soil to an approximate depth of 25 feet;
- In-situ stabilization/solidification (ISS) of one of the gas holder foundations and its contents;
- Installation of recovery wells immediately outside the 50 Kent Ave. parcel in the street rights of way to collect NAPL which lies beyond the boundaries of the excavation; and
- Soil on the remainder of the 50 Kent Ave parcel will be excavated to the water table, approximately 5 feet below ground surface, and disposed off-site. The site will then be returned to approximately its existing grade. A soil cover, consisting of a minimum of two feet of soil meeting Restricted Residential Soil Cleanup Objectives, which also allows for active recreational use, will be placed across the entire site.
On-going and future work at the Site includes:
- Ongoing biweekly NAPL gauging and recovery at wells on North 11th and North 12th Streets; and
- Start of contractor mobilization in November 2015.
November 2015 Update
The Interim Remedial Measure (IRM) work is set to begin, which will address the contamination related to the site at Kent Ave & 12th Street.
A public meeting was held at the Bushwick Inlet Park Headquarters on September 29, 2015 to discuss the cleanup activities and what the community can expect throughout the duration of the work.
The goal of the cleanup is to achieve levels that protect public health and the environment. The cleanup action for the site includes:
- Excavation and off-site disposal of two gas holder foundations and associated Non- Aqueous Phase Liquid (NAPL)-contaminated soil to an approximate depth of 25 feet;
- In-situ stabilization/solidification (ISS) of one of the gas holder foundations and its contents;
- Installation of recovery wells immediately outside the 50 Kent Ave. parcel in the street rights of way to collect NAPL which lies beyond the boundaries of the excavation; and
- Soil on the remainder of the 50 Kent Ave parcel will be excavated to the water table, approximately 5 feet below ground surface, and disposed off-site. The site will then be returned to approximately its existing grade. A soil cover, consisting of a minimum of two feet of soil meeting Restricted Residential Soil Cleanup Objectives, which also allows for active recreational use, will be placed across the entire site.
On-going and future work at the Site includes:
- Ongoing biweekly NAPL gauging and recovery at wells on North 11th and North 12th Streets; and
- Start of contractor mobilization in late November 2015.
Williamsburg Dear Neighbor Letter
Update for the Week Ending December 18, 2015
Site Mobilization Begins
On-going activities:
- Continued mobilization of equipment and supplies;
- Continued the application of water for dust control;
- Applied odor suppressant foam as needed for odor control; and
- Maintained erosion and sediment controls (Installed waddles, wood chip filled fabric tubes, around the Site perimeter to prevent silt and sediment from leaving the Site).
Recently completed activities:
- Conducted the Preconstruction Safety Kick-Off Meeting with all Site personnel, National Grid, NYC Parks, and NYSDEC;
- As part of mobilization activities:
- installed sound attenuating barrier around site perimeter,
- set up office trailers for site personnel
- installed temporary generator while preparing for long-term electric power service to site
- conducted photographic survey of preconstruction conditions of Site and surrounding sidewalks and roads;
- installed water treatment plant (WTP) containment pad and components
Upcoming activities:
- Conduct small, shallow preclearance excavations for drilling and sampling to be conducted the week of January 4, 2016;
- Complete the assembly of the WTP;
- Assemble temporary containment building (TCB) and vapor management system; and
- Decommission former monitoring wells within the excavation area.
Community Air Monitoring Plan Summary
Community air monitoring, initiated on Tuesday, December 1, 2015, continues as intrusive (ground disturbance) activities are conducted.
There were no fifteen-minute action level exceedances of Total Volatile Organic Compounds (TVOCs) or odors associated with Site activities during this reporting period. There was one 15-minute exceedance for particulate matter (PM) on Thursday, December 18 from 8:45 a.m. until 9:01 a.m. due to dust created during the breaking of clean concrete to be used for recycling on Site.
If you have any questions or comments about the work on the Site, please use the Williamsburg MGP Telephone Hotline at (718) 403-3053.
Photos of Activity
Testing the odor suppressing foam unit
Impermeable liner installed beneath Water Treatment Plant pad
Compacting backfill placed for Water Treatment Plant pad
Security fence / sound attenuating barrier