Environmental Monitoring 08/25/16

USEPA issued a modification to the Pompton Lakes Works facility RCRA permit on June 22, 2015 to remove mercury impacted soils and sediment from Pompton Lake. The remedy encompasses four areas consisting of approximately 40 acres. The areas identified in the permit modification include upland soils between Rotary Park and the lake, the lake bottom adjacent to Rotary Park, and the lake bottom at two downstream locations. A map depicting these areas is provided above. A Corrective Measures Implementation (CMI) work plan which describes the means and methods upon which the remedy will be completed was approved by USEPA on April 22, 2016. Field activities associated with the remedy commenced in early June 2016.  Work completed in 2016 consisted of the removal of soils in the Uplands Area and sediments in the Island Area and Lake Area A.  Work completed in 2017 consisted of the removal of sediment from the Delta Area. Environmental monitoring of surface water (turbidity), air (dust and mercury vapor), and noise is being conducted in accordance with the CMI work plan during the removal phases of the remediation program. Download Monitor and Removal Area Detail View Work to be completed in 2018 consists of the placement of eco-layer material in the Delta Area and Island Area as well as restoration in these two areas. Download Eco-Layer Progress Detail Delta Area Download Eco-Layer Progress Detail Island Area

Monitoring Program Data View Archives

Chemours is committed to sharing monitoring data (turbidity, dust, mercury vapor) collected during remedy implementation with the community. The graphs below contain data from the various monitoring locations around the project area.

1. Wind Monitoring

Wind Environmental Monitor Graph
Click Image to Enlarge


2. PM10 Particulate (Dust) Monitoring

Dust Environmental Monitor Graph
Click Image to Enlarge


3. Mercury Vapor Monitoring

Mercury Environmental Monitor Graph
Click Image to Enlarge

Comments

Based on a review of the mercury vapor data and site activities on this day (there were no excavation or load-out activities), it appears there was a mercury meter malfunction (due to continued heat and humidity) at the downwind monitoring station causing the elevated reading as shown on the graph. None of the other 15-minute average mercury readings collected during this monitoring event were above the instrument’s detection limit of 0.05 µg/m3 and were below the threshold level of 0.31 µg/m3.

 


4. Turbidity Monitoring

Turbidity Environmental Monitor Graph
Click Image to Enlarge

Comments

It has been determined that there is a battery malfunction at the upstream monitoring location.  A new battery is being procured and will be installed during the early portion of the week of August 29, 2016.


View Archives