Site-Specific Variance From the Land Disposal Restrictions Treatment Standard for 1,3-Phenylenediamine (1,3-PDA)

EPA is taking direct final action to revise the waste treatment standard for 1,3-phenylenediamine (1,3-PDA) for a biosludge generated at DuPont's Chambers Works facility in Deepwater, New Jersey. This variance is necessary because the facility is unable to measure compliance with the 1,3-PDA land disposal restrictions treatment standard in its multisource leachate treatment biosludge matrix. As a practical matter, therefore, the facility cannot fully document compliance with the requirements of the treatment standard. For the same reason, EPA cannot ascertain compliance for this constituent. Furthermore, faced with the inability to demonstrate treatment residual content through analytical testing for this constituent, this facility faces potential curtailment of 1,3-PDA production operations. This site-specific variance will provide alternative technology treatment standards for 1,3-PDA in multisource leachate that do not require analysis of the biosludge matrix to determine whether the numerical treatment standard is being met, thus ensuring that treatment reflecting performance of the Best Demonstrated Available Technology occurs and that threats to human health and the environment from land disposal of the waste are minimized.