Update for the Week Ending June 17, 2016
Site Remediation Continues
- Continued the application of water and calcium chloride for dust control;
- Continued the application of odor-suppressant foam and BioSolve for odor and dust control;
- Maintained erosion and sediment (E&S) controls (Installed waddles - wood chip and straw filled fabric tubes - around the Site perimeter to prevent silt and sediment from leaving the Site and covered all stockpiles);
- Continued operation of the water treatment plant (WTP) and discharge to the sewer;
- Continued lining and loading trucks and shipping impacted soil to Bayshore Soil Management for treatment and disposal:
- 41 trucks; 1,185.59 tons shipped last week; and
- 6,312.91 tons shipped to date.
- Continued excavation and installation of the cement/bentonite (CB) slurry trench for installation of the support of excavation (SOE) wall sheet piles:
- 169 linear feet installed last week; and
- 582 of 629 linear feet installed to date.
- Continued installation of the sheet piles in the CB slurry trench for the SOE wall:
- 142.3 linear feet installed last week; and
- 367.2 of 629 linear feet installed to date.
Recently completed activities:
- Completed installation of the CB slurry trench along the west alignment of the SOE wall; and
- Completed installation of sheet piles in the CB slurry trench along the south alignment of the SOE wall.
- Relocate and expand the temporary containment building (TCB) over the SOE wall area in preparation for conducting the deep excavation;
- Initiate abandonment of monitoring wells located within the excavation;
- Install deep wells for dewatering in preparation for conducting the deep excavation; and
- Initiate the deep excavation within the SOE wall.
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 Limit exceedances for Total Volatile Organic Compounds (TVOCs) or odors during this reporting period.
There was one instance of the fifteen-minute average concentration of Particulate Matter (PM-10) [dust] exceeding the applicable Action Limit on June 14, 2016, due to dust generated during mixing at the grout plant. Additional water was sprayed during mixing, and the dust levels decreased below the Response Limit.
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
Installing sheet piles in the CB slurry trench along the west alignment of the SOE wall.
Excavating soil and installing the CB slurry trench along the west alignment of the SOE wall.
Spraying water and Biosolve for dust and odor control during excavation of the CB slurry trench.
Sounding the CB slurry trench to verify excavation to a depth of 48 feet below ground surface.
Applying odor suppressant foam to the CB slurry trench and surrounding area for odor control.
Excavating soil and installing the CB slurry trench along the west and north alignments of the SOE wall and applying odor suppressant foam to the excavated soil.