Denka Air Monitoring Data Summaries

Denka air monitoring data summaries can be accessed using the links below.

• Addendum to Summary Report - Air Monitoring for Chloroprene Concentrations in LaPlace, LA from May 25, 2016 through September 26, 2020 - November 2020 (pdf) (289.52 KB)
  In September 2020, the U.S. Environmental Protection Agency released a summary report of the community air monitoring for chloroprene concentrations in LaPlace, LA from May 25, 2016 through July 16, 2020. This document supplements that report to cover the results through the conclusion of the EPA’s community air sampling on September 26, 2020.
• Denka community air monitoring summary report (pdf) (1.06 MB, September 2020)
  Summary Report, U.S. Environmental Protection Agency (EPA) and Louisiana Department of Environmental Quality (LDEQ) Air Monitoring for Chloroprene Concentrations near the Denka Performance Elastomer LLC (DPE) Facility in LaPlace, Louisiana, May 25, 2016 through July 16, 2020
• Denka Air Monitoring Data Summary (pdf) (330.08 KB)
  Air monitoring data summary from May 25, 2016 to September 26, 2020.
• Initial Phase Report, U.S. Environmental Protection Agency (EPA), Continuous Air Monitoring for Chloroprene Concentrations near the Denka Performance Elastomer LLC (DPE) Facility in LaPlace, Louisiana, March 2020 through August 2020 (pdf) (286.37 KB)
  Initial Phase Report on Continuous Air Monitoring for Chloroprene Concentrations near the Denka Performance Elastomer in Facility in LaPlace, Louisiana, March 2020 through August 2020
• EPA Continuous Monitoring Program using SPod Monitoring Tools- Data for March 10, 2020 through August 16, 2023 (xlsx) (1.44 MB)
  EPA continuous ambient air monitoring with SPods began on March 10, 2020 and concluded through August 16, 2023. This data may be copied from this spreadsheet, and provides monitoring data from March 10, 2020 through August 16, 2023.
• Coordinates of Denka Method 325 Monitoring sites, and average Chloroprene and average 1, 3-butadiene concentrations reported for those sites for January thru September 26, 2024: Denka Ambient Air Monitoring Locations and Average Chloroprene and Butadiene Ambient Concentrations (pdf) (742.69 KB) ; CAA Section 114 requested  Denka Method 325 Monitoring Data for January 6, 2022 thru February 13, 2025 (xlsx) (1.15 MB)
  Spreadsheet contains the Method 325 monitoring locations and results of ambient sampling for chloroprene and 1,3-butadiene for the time period of January 6, 2022 through February 13, 2025. 
• Map of Denka TO-15 Summa Canister Monitoring sites:  Denka has been monitoring for chloroprene using TO-15 Summa Canisters pursuant to a CAA Section 114 request since July 7, 2022.  Spreadsheet containing TO-15 monitoring locations and results of ambient sampling for chloroprene for the time period of July 4, 2022 thru March 28, 2025. Monitoring Data for July 4, 2022 through March 28, 2025 (xlsx) (1.55 MB)
• Individual monthly reports for Denka’s Chloroprene and 1,3-butatiene monitoring can be accessed online through the Louisiana Department of Environmental Quality’s  Electronic Document Management System (EDMS) under the Agency Interest Number (AI) 199310 at https://edms.deq.louisiana.gov/edmsv2/quick-search