HomeMy WebLinkAboutDEQ-CFW_00004559I reviewed the NCSAB's completed risk assessment and recommendation for the revision of the IMAC for
PFOA. I recommend that the DWQ revise the current PFOA IMAC of 2 ug/L to the NCSAB recommended
level of 1u8/L.
Where: RfD=Reference Dose =U.0016mg/Kg-day (extrapolated from NCSABRisk
Assessment-Butenhoff,2UOI)
RSC = Relative source contribution, default = 20% for organics
DI = Drinking Water Intake = Daily water intake for an adult, default = 2 L/day
This recommendation is also in line with the USEPA's provisional health advisory of 0.4 ug/L for a child
(http://vvater.epa.Rov/action/advisorieu/drinkino/up|oad/ZUO9_O1_1S_criteria_drinkin0_pha'
PFOA_PFO5.pdO.