Air Monitoring: Dennis Collins Park (Site No. 174)

Protection of human health is a priority during PPG Industries’ clean-up operations at its chromium sites, including Site No. 174, which is located within a portion of Dennis Collins Park in Bayonne. To protect the community, PPG is using proven containment and control measures that have been approved by the New Jersey Department of Environmental Protection following a review by the independent technical consultant.

Among these protective measures is a dust-suppression plan designed to prevent excavated materials, including hexavalent chromium, from becoming airborne. Elements of the plan include water misting of work areas, placing tarps on stockpiles of excavated material, spraying surfaces with dust-suppression materials and restricting truck traffic to paved areas, wherever possible.

PPG has installed air monitoring stations at the perimeter of the cleanup site to ensure safe conditions continue to be maintained during cleanup activities. Air monitors are in use while active work is taking place and data from these monitors are included in the weekly reports posted below.

Chrome

Air samples are collected, analyzed for chromium and the results are compared to the acceptable air concentration limit established by the NJDEP specifically for PPG cleanup sites. The limit is 487 nanograms per cubic meter of air, which is protective of human health based on a noncarcinogenic exposure endpoint with a duration of one calendar year or less for intrusive remedial activities. PPG must meet NJDEP’s acceptable air concentration limit for the duration of the remediation. PPG, meanwhile, has established an operational goal of achieving a project average hexavalent chromium air concentration of 49 nanograms per cubic meter of air to the extent practicable using best management practices during the duration of intrusive activities.

Monitoring for specific compounds such as chromium requires samples be collected and sent to a lab for analysis. Samples are collected daily at each station during the work shift with one station collecting a 24-hour sample during the week and a 72-hour sample over the weekend.

Dust

Dust, meanwhile, can be measured in real-time while work is taking place, allowing management to take immediate action designed to protect community health if needed. As a result, PPG continuously measures airborne dust as a surrogate for hexavalent chrome at each air monitoring location. The perimeter monitors take measurements while active work is under way, typically Monday through Friday, between 7 a.m. and 3 p.m.; however, based on site-specific conditions, field work may occur until 6 p.m.

The NJDEP-approved air monitoring plan established a limit on respirable dust of 339 micrograms per cubic meter measured on a 15-minute average basis. Full-time air monitoring technicians located on site while work is being conducted review these real-time dust readings to control site operations and implement additional dust-suppression measures as needed to protect the community.

2020 0907-0913 Site 174 AM Weekly Report
2020 0831-0906 Site 174 AM Weekly Report
2020 04 Dennis Collins Park (Site 174) Monthly AM Report
2020 0406-0412 Site 174 AM Weekly Report
2020 04 Dennis Collins Park (Site 174) Monthly AM Report
2020 0330-0405 Site 174 AM Weekly Report
2020 0323-0329 Site 174 AM Weekly Report
2020 0316-0322 Site 174 AM Weekly Report
2020 0309-0315 Site 174 AM Weekly Report
2020 0302-0308 Site 174 AM Weekly Report
2020 03 Dennis Collins Park (Site 174) Monthly AM Report
2020 02 Dennis Collins Park (Site 174) Monthly AM Report
2020 0224-0301 Site 174 AM Weekly Report
2020 0217-0223 Site 174 AM Weekly Report
2020 0210-0216 Site 174 AM Weekly Report
2020 0203-0209 Site 174 AM Weekly Report
2020 01 Dennis Collins Park (Site 174) Monthly AM Report
2020 0127-0202 Site 174 AM Weekly Report
2020 0120-0126 Site 174 AM Weekly Report
2020 0113-0119 Site 174 AM Weekly Report
2020 0106-0112 Site 174 AM Weekly Report