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Document ID us-dssrapapsa-2025-01-14 Title Draft Sewage Sludge Risk Assessment for Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonic Acid (PFOS) URL https://www.epa.gov/biosolids/draft-sewage-sludge-risk-assessment-perfluorooctanoic-acid-pfoa-and-perfluorooctane Jurisdiction /us Subdomain(s) none Language Status completed Analyzed at 2026-05-12 04:27:51.460120+00:00 Relevance inventory_targeted_fetch

6 Qualitative 19 Quantitative 19 Definitions

Q Qualitative Requirements (6)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Context	Conditions	Confidence
#R001	administrative	reporting	mandatory	OCPSF Standards Incorporation	wastewater	The OCPSF Effluent Guidelines and Standards are incorporated into NPDES permits for direct dischargers and permits or other control mechanisms for indirect dischargers.		high
#R002	operational	operational	mandatory	BOD and TSS Limitation Determination	wastewater	Specifies the method of determining BOD and TSS limitations for plants that manufacture products in more than one subcategory.	plants that manufacture products in more than one subcategory	high
#R003	operational	operational	mandatory	Waste Stream Designation Criteria	wastewater	Revised criteria for designating "metal-bearing" and "cyanide-bearing" waste streams.	designation of metal-bearing or cyanide-bearing waste streams	high
#R004	administrative	unknown	guidance	Coverage Definition Reference	wastewater	For precise definitions of coverage, refer to the applicability sections in 40 CFR Part 414.		high
#R005	operational	treatment	guidance	Alternative Cyanide Limitations Allowance	wastewater	Alternative cyanide limitations for unavoidable complexing of cyanide at the process source of cyanide-bearing waste streams.	unavoidable complexing of cyanide at the process source of cyanide-bearing waste streams	high
#R006	administrative	operational	guidance	Background Metal Level Accommodation Allowance	wastewater	Allows control authorities to accommodate low background levels of metals in non-metal-bearing waste streams that result from the corrosion of construction materials, intake water, or other incidental metal sources.	low background levels of metals in non-metal-bearing waste streams resulting from corrosion, intake water, or incidental sources	high

P Quantitative Requirements (19)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Limit Type	Limit Value	Context	Conditions	Confidence
#R007	chemical	operational	mandatory	Beryllium Alloy Concentration Threshold	wastewater	requirement	>= 0.1 percent by weight	Definition of beryllium alloys within the Nonferrous Metals Forming and Metal Powders category	Alloy in which beryllium is present	high
#R008	chemical	operational	mandatory	Iron, Copper, or Aluminum Alloy Exclusion Threshold	wastewater	requirement	> 50 percent by weight	Exclusion threshold for alloys containing iron, copper, or aluminum from the nonferrous metal alloys category	Except for precious metal alloys	high
#R009	operational	operational	mandatory	Website Feedback Field Character Limit	other	requirement	<= 400 characters	Character limit for the explanation and suggestion fields in the website feedback section	Applies to text input fields for rating reasons and website improvement suggestions	high
#R010	design	operational	mandatory	NFMF Subcategory Count	wastewater	requirement	10 subcategories	The NFMF Category structure for the regulation		high
#R011	operational	operational	mandatory	Website Feedback Character Limit	other	requirement	<= 400 characters	User feedback explanation for ratings and suggestions for website improvement	Applicable to text entry fields on the feedback form	high
#R012	operational	operational	recommended	Website Feedback Survey Duration	other	requirement	2 minutes	Time estimation for completing the optional secondary feedback section		high
#R013	design	operational	mandatory	Mineral Mining Regulatory Subcategories	wastewater	requirement	21 subcategories	The Mineral Mining and Processing effluent guidelines apply to wastewater discharges from facilities in 21 subcategories	Covering extraction of a wide variety of minerals	high
#R014	physical	operational	mandatory	Website Feedback Character Limit	other	requirement	<= 400 characters	Character limit for text entry fields including reason for rating, why visiting, and improvement suggestions	Applies to multiple fields on the EPA website feedback form	high
#R015	operational	operational	guidance	Website Feedback Survey Estimated Time	other	requirement	2 minutes	Would you like to take two more minutes to answer more questions to help us improve our services?	Applicable to the optional second page of the feedback survey	high
#R016	design	operational	mandatory	Infiltration Groundwater Buffer	other	requirement	1.0 m	Minimum clearance from the base of the GI's infiltration layer to the seasonal high groundwater table	To minimize risk of groundwater contamination and mitigate mounding	high
#R017	design	operational	mandatory	Building Foundation Setback	other	requirement	4 m	Minimum setback from buildings for infiltration-based GI systems	Unless impermeable liners are installed or the foundation is waterproofed	high
#R018	design	operational	mandatory	Soil Volume Per Tree	other	requirement	30 m3	Minimum growing medium volume per tree for continuous soil trenches	Intended to support large growing shade trees to maturity	high
#R019	physical	operational	mandatory	Native Soil Infiltration Threshold	other	requirement	> 15 mm/hr	Threshold for native soil to be suitable for infiltration-based GI without underdrains	Should also be > 1m from bedrock and water table	high
#R020	design	operational	mandatory	Underdrain Minimum Diameter	other	requirement	200 mm	Minimum requirement for perforated HDPE or PVC piping in GI systems	Required where soil infiltration rates are insufficient	high
#R021	design	operational	mandatory	City Pedestrian Clearway	other	requirement	2.1 m	Required clear width for pedestrians on sidewalks in the City of Toronto	Must be integrated when placing GI systems in the boulevard	high
#R022	design	treatment	mandatory	Curb Opening Inlet Width	other	requirement	600 mm	Minimum base width for curb openings to GI systems	To allow for maintenance	high
#R023	operational	treatment	mandatory	Infiltration Trench Drain-down Time	other	requirement	< 48 hours	Time for an infiltration trench to be completely drained after a 2-yr design storm	To ensure capacity for subsequent events	high
#R024	design	treatment	recommended	Bioretention Max Ponding Depth	other	requirement	300 mm	Maximum ponding depth for bioretention cells where partial infiltration is used	Applies when filter media depth is >= 1m	high
#R025	operational	treatment	mandatory	Permeable Pavement Surface Infiltration Rate	other	requirement	280 mm/hr	Minimum infiltration rate through the surface course for permeable asphalt or concrete	Over the expected design life, including a safety factor of 10	high

D Definitions (19)

Req ID	Name	Context	Confidence
#D001	direct dischargers	A point source that discharges pollutants to waters of the United States, such as streams, lakes, or oceans.	high
#D002	indirect dischargers	A facility that discharges pollutants to a publicly owned treatment works (municipal sewage treatment plant).	high
#D003	NPDES	National Pollutant Discharge Elimination System	high
#D004	SIC	Standard Industrial Classification	high
#D005	BOD	biochemical oxygen demand	high
#D006	TSS	total suspended solids	high
#D007	OCPSF	Organic Chemicals, Plastics and Synthetic Fibers	high
#D008	PFAS	Per- and polyfluoroalkyl substances	high
#D009	ANPRM	advance notice of proposed rulemaking	high
#D010	CCH	chlorine and certain chlorinated hydrocarbons	high
#D011	CS 2	carbon disulfide	high
#D012	PFAS formulators	facilities that produce a variety of PFAS products and materials from PFAS feedstocks	high
#D013	direct dischargers	A point source that discharges pollutants to waters of the United States, such as streams, lakes, or oceans.	high
#D014	indirect dischargers	A facility that discharges pollutants to a publicly owned treatment works (municipal sewage treatment plant).	high
#D015	NAICS	North American Industry Classification System	high
#D016	BPT	Best Practicable Pollutant Control Technology Currently Available	high
#D017	NSPS	New Source Performance Standards	high
#D018	PSES	Pretreatment Standards for Existing Sources	high
#D019	PSNS	Pretreatment Standards for New Sources	high