Pulled this info. Directly from the document. It will take a while to investigate the science behind the test options. But note several options include "DNA"

Safe Tracer Materials Being Considered for Use in CBT and UTD Test Option Description Planned Use in CBT Planned Use in UTD P1 DNATrax-OB No Yes P2 DNATrax-Silica No Yes P3 Safe Tunable Alginate Microparticles (STAMP) with cargoes Yes Yes P4 DNA-Silica liquid mixture Yes No P5 Visolite Yes No G1 Sulfur hexafluoride (SF6) Yes Yes G2 SF6 and Perfluorocarbon tracers (PFTs) Yes Yes

UTD: Particle and gas tracer releases would occur within a defined two-week timeframe between September and December 2021. There would be five separate testing days scheduled within this two-week timeframe. NYC Stakeholders were recently updated on the UTD program in May 2021 and have initially concurred with October 17-30, 2021 as the desired release window. CBT: Particle and gas tracer releases would occur on a rolling basis starting October 2021, with the specific schedule dependent on the pace of technology installation and funding availability. Testing would occur up to 10 days per month, with a maximum of four test events per day. Several particle (P) and gas (G) test options may be used in the Proposed Action to meet the scientific objectives of both the CBT and UTD programs, these safe tracer materials are being considered in this EA. Table 1. summarizes proposed usage of the safe tracer materials across the two programs.