PFAS Reportable Quantities Calculator for CERCLA Rule
This calculator is intended to help water reclamation facilities understand if their effluent discharges or biosolids management activities have the potential to trigger RQ requirements. We have provided sample PFOA and PFOS concentrations based on preliminary data from a recent research project, but we encourage utilities to not rely on these average concentrations when making regulatory estimates. Using utility-specific data is highly recommended.
Plant Effluent
Biosolids
For sludge production, it is assumed that the annual production amount converted to average dry tons per day is an appropriate way to assess the RQ versus using any alternative processing or trucking schedules. While specific calculations are not provided for sewage sludge incinerators due to a lack of information on potential transformation of PFAS during incineration, utilities processing their sludge through a sewage sludge incinerator can use the biosolids calculator as a conservative measure of whether the RQ may be an issue.
| 0.001 | kilogram (kg) |
| 1 | gram (g) |
| 1,000 | milligram (mg) |
| 1,000,000 | microgram (µg) |
| 1,000,000,000 | nanogram (ng) |
| mg/L, mg/kg | parts per million (ppm) |
| µg/L, ng/g | parts per billion (ppb) |
| ng/L, ng/kg | parts per trillion (ppt) |
| Location | Units | PFOA | PFOS | ||
| Average | 95%CI | Average | 95%CI | ||
| Effluent | ng/L | 10.43 | 3.20 | 9.42 | 4.18 |
| Biosolids | ng/kg | 3,768 | 1,571 | 20,851 | 14,290 |
|
Source: WRF 5031 preliminary results of 38 WRRFs in 24 states CI = confidence interval |
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CDM Smith and Trinnex do not warrant or assume any legal liability or responsibility for the accuracy, completeness or usefulness of information provided by, or obtained through the use of this tool. Users agree to use the tool at their sole risk, and to release and hold harmless CDM Smith and Trinnex from any and all liability with respect to their use of the tool.