Document vVo79Jv3k4OLLyNRon2aqqeGq

AR226-3365 '.SCT|tiOEiaI;kyla^a;su ,.a;^S||^*t:^ ' Goir^6uad^s<A^ii^^^r^^^^^llsit^^ - <^C))^^mGiu(fii|g^tt{|^^e| tll&:aqaatice^vir<m^^enl:^;;elth:er:SffieC^ products of other perfl^o^i,Qflted^ompoun(is.:i<:^.'i'/%i':i''l'&'^ environmental persiste!iGe;MdB(|tential:^ degradation of these compounds are important areas orjeseari?6| the development of aquatichazard data for use m anvironmeinti::: risk assessment is also important for those compounds that may reach aquatic ecosystems. ve 9&'6SfEEC Anncli V. Pan C.3. AlEalllA S[iLi:hck.J..M.Ztc[MnnaR.t:]erecats. 199S, Ecoiotieo'loro'an [ the nssessnunt of chemicals BI llie US. EPA'E nd Futun NcedE, pp. I37.I5BIn: Moting vis,}. Ecoprinl. Ponland. OR. 271pp. Test Method - screens based on QEC&TG203 ' ' . , - 96 hour static exposure; 35 L test^ solution in 26"^ stainless-steel tank ' : - Nominal test substance concentrations ~ control, 0.1, 1, i0 and lOQgm/L - 1 replicate per concentration or well water control - 5 fish per replicate; fish age --43 - 47 days post-hatch - water bath at! 2 1C, 16:8 photoperiod, ~250 - 500 lux - pH, DO, and tennperature measured at test start and end - 96-hr lethality used as endpoint Test Compounds - 2-PerfIuorooctyl ethanoic acid, CAS# 27854-31-5 a white solid- (C8F17CH2COOH), purity 99.4% - 2H-hexadecanuoro-2-decenoic acid. CAS# 70887-84-2 a white solid - (C7F15CF=CHCOOH), purity 99.8% - n-Periluorodecanoic acid, CAS# 335-76-2 awhile solid-(C9F19COOH), purity 99.6% 1 11 '" .......... / 1 111 sl / i rs i" l: \ m it ,': : v ie ' /! 1 v , ----"---------""' ?>^.------------ ' ----.-- Ccneanlfllon, mgfL , ^:^^:^:^.:^^^^^^^;.;.^:^^?.$5^^^^ The acute hazard of three perfluormated acids to algae, daphnids, and fish was concentrations of 0,1, 1.0,10 and 100 mg/L for each test species and compoun EC/LC50s based on inhibition of healthy cell count, immobility and lethality w Daphnids were most sensitive to two of the test substances while algae were m comparative algae and daphnid sensitivity were similar considering the range were much less sensitive (e.g. 3 -10X) than either algae or daphnids. The test results suggest the three substances are of medium concern (i.e., EC5 aquatic organisms (Smrchek et al. 1995), Reported rainwater concentrations f extrapolated to surface waters suggest that the acute risk to aquatic organisms