Pittsburgh, PA and Washington, DC
The Foundation Water Law Newsletter
(by Lisa M. Bruderly, Mackenzie M. Moyer and Jessica Deyoe)
On March 9, 2024, the Pennsylvania Department of Environmental Protection (PADEP) announced the availability of its draft National Pollutant Discharge Elimination System (NPDES) General Permit for Discharges of Stormwater Associated with Construction Activities (draft 2024 General Permit), which would apply to eligible projects proposing earth disturbance greater than or equal to one acre. See 54 Pa. Bull. 1263 (Mar. 9, 2024). PADEP accepted comments on the draft through April 8, 2024. PADEP’s draft 2024 General Permit includes significant changes compared to the PAG-02 General Permit currently in effect, set to expire on December 7, 2024 (2019 General Permit). To supplement these changes, PADEP is expected to update the Erosion and Sediment Module 1 and Post-Construction Stormwater Management (PCSM) Module 2 to be consistent with the draft 2024 General Permit upon reissuance.
The 2019 General Permit requires that proof of the recording of an instrument for post-construction stormwater management (PCSM) best management practices (BMPs), now referred to as stormwater control measures (SCMs), be submitted to PADEP or the County Conservation District (CCD) with the Notice of Termination (NOT) or a Transfer Application. The draft 2024 General Permit would require submission of the full recording and proof of the recording to PADEP before a pre-construction meeting is scheduled, as well as upon the submission of the NOT to ensure compliance. The draft 2024 General Permit would also require the use of a standard form to document the completion of each structural PCSM SCM, which must be signed by a licensed professional and submitted to PADEP or CCD within 30 days of completion of each SCM.
The draft 2024 General Permit would require site inspections to be conducted by qualified personnel only, with PADEP providing three options to demonstrate that a person is qualified. Existing permittees would have one year from the effective date of the 2024 General Permit, December 8, 2024, to implement this provision. PADEP’s draft 2024 General Permit would also require the submission of an annual report by December 7 of each year. This report would require information on the status of the project. For existing permittees, the draft 2024 General Permit would require a renewed NOI to be submitted by December 7, 2024, to remain covered under the reissued PAG-02 General Permit.
Additionally, the draft 2024 General Permit identified specific types of non-stormwater discharges that would be authorized during earth disturbance activities to be consistent with other PADEP General Permits for stormwater discharges. The U.S. Environmental Protection Agency’s (EPA) technology-based standards at 40 C.F.R. pt. 450 are incorporated into the effluent limitation requirements, in addition to two new requirements for construction dewatering water. Discharges would be required to be treated by an approved series of at least two BMPs.
PADEP to Require PFAS Sampling in NPDES Permit Applications
In February 2024, the Pennsylvania Department of Environmental Protection (PADEP) updated its National Pollutant Discharge Elimination System (NPDES) permit application process for Major Sewage Facilities and Individual Industrial Wastewater permits to include per- and polyfluoroalkyl substances (PFAS) sampling. PFAS have historically been used to make products water, stain, and heat resistant and have been a key ingredient in some aqueous film forming foams (AFFF) used to extinguish flammable liquid fires, most commonly found at airports or on military bases. PFAS are known as “forever chemicals” because they do not break down naturally in the environment. Due to these properties and their ubiquitous nature, PFAS have been found in various environmental media, such as groundwater (including drinking water), plants, animals, and humans.
Major Sewage Facilities and Individual Wastewater permit applicants will now need to sample for four PFAS compounds as part of Pollutant Group 1 testing. The compounds required to be tested include perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorobutanesulfonic acid (PFBS), and hexafluoropropylene oxide dimer acid (HFPO-DA, commonly known as GenX).
Because PFAS has been added to Pollutant Group 1, all industrial categories are subject to the sampling requirements. Ongoing monitoring may also be required. Applicants with non-detect results or results at or below the Target Quantification Limits (QLs) will be required to monitor annually. Applicants with detections or non-detects above the QL will be required to sample quarterly. The QLs are 4.0 parts per trillion (ppt) for PFOA, 3.7 ppt for PFOS, 3.5 ppt for PFBS, and 6.4 ppt for HFPO-DA.
Ongoing monitoring may be discontinued if there are four consecutive monitoring periods with non-detect results at or below the QLs. Additionally, Module 1 of the Individual Wastewater Permit application, which is required for Industrial Stormwater discharges, has been updated to ask whether AFFF containing PFAS have been used at the facility.
PADEP Water Resources Advisory Committee Updates
The Pennsylvania Department of Environment Protection’s (PADEP) Water Resources Advisory Committee (WRAC) met on May 16, 2024, to discuss PADEP’s proposed rulemaking regarding notification requirements for unauthorized discharges to waters of the commonwealth and the draft final Triennial Review of Water Quality Standards (WQSs). Section 91.33 of Title 25 of the Pennsylvania Code requires immediate notification to PADEP if, because of an accident or other activity or incident, a toxic substance or other substance which would endanger downstream users or otherwise result in pollution reaching the waters of the commonwealth, is discharged into waters of the state. The characteristics of unauthorized discharges, such as spills and leaks, are not known prior to the discharge, and there are many site-specific factors affecting the risk of unauthorized discharge. According to PADEP, the purpose of the proposed regulation is to make the notification requirements for unauthorized discharges as straightforward as possible. The requirements do not expand notification obligations but attempt to clarify which unauthorized discharges need to be reported. In PADEP’s presentation to the WRAC, PADEP provided examples of unauthorized discharges that do not need to be reported, discharges that may need to be reported, and discharges that must be reported. For example, releases of materials within secondary containment when there is no possibility of the substance reaching waters of the commonwealth do not need to be reported, spills of non-liquid materials into waters of the commonwealth may not need to be reported, depending on the material, and sanitary sewer overflows that reach waters of the commonwealth must be reported.
WRAC also reviewed the draft final version of the Triennial Review of WQSs regulation. In the regulation, PADEP proposed new or updated WQSs for 17 toxic substances including: acetone, barium, boron, cadmium, carbayl, chloroform, chorophenoxy herbicide, 1,4 dioxane, formaldehyde, methyl isobutyl ketone, metolachlor, resorcinol, 1,2,3 trichloropropae, 1,2,4 trimethylbenzene, 1,3,5 trimethylbenzene, and xylene, among others. According to PADEP, there were no changes between the proposed regulation and the final regulation.
Copyright © 2024, The Foundation for Natural Resources and Energy Law, Westminster, Colorado
