Environmental Monitoring 10/30/17

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 encompassed four areas consisting of approximately 40 acres. The areas identified in the permit modification included 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 below. 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.  Work completed in 2018 consisted of the placement of eco-layer material in the Delta Area and Island Area as well as restoration in these two areas. Download Monitor and Removal Area Detail View

Monitoring Program Data View Archives

Environmental monitoring of surface water (turbidity), air (dust and mercury vapor), and noise was conducted in accordance with the CMI work plan during the removal phases of the remediation program. 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
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2. PM10 Particulate (Dust) Monitoring

Dust Environmental Monitor Graph
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3. Mercury Vapor Monitoring

Mercury Environmental Monitor Graph
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Comments

Based on a review of the mercury vapor data, it appears there was a mercury meter malfunction at approximately 1545 at the downwind monitoring station (AM-2) 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. Additionally, this elevated reading does not correlate to an elevated dust reading at AM-2 at the same time; further indicating that it was a meter malfunction. During this time period, the wind direction was away from AM-2 (i.e., wasn’t downgradient of any site-related activities such as dredging or sediment processing).

4. Turbidity Monitoring

Turbidity Environmental Monitor Graph
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