Document jZBZYXK0p49QoxLB5OpR82J9

EEvvaalluuaattiioonn ooff PPeerrfflluuoorroocchheemmiiccaall RReemmoovvaall bbyy aa SSmmalalll,, IInn--hhoommee FFiilltteerr Background: aOn behalf of the Minnesota Pollution Control Agency (MPCA} and Minnesota Department of Health ((MMDDHH)),, W Weesstt CCeennttrraall EEnnvviirroonnmmeennttaall CCoonnssuultltiinngg ((WWCCEECC)) tteesstteedd aann iinneexxppeennssiivvee aanndd eeaassyy ttoo iinnssttaallll ccaarrbboonn filter to determine how well it removes perfluorochemicals (PFCs) from drinking water. iVletho~l: WCEC tested a PUR faucet mount water filter (model FM-2000B, FM3333B), which is intended for home use to treat water from a single faucet. The filter contains a proprietary carbon formulation that, according to the manufacturer, meets ANSIiNSF standards 53 and 40:1 for removal of a wide range of contaminants (metals, pesticides, volatile organic compounds, and emerging contaminants). The manufacturer makes no claims about PFC removal. Water containing all seven PFCs typically detected in south Washington County groundwater was used to test the filter. The amount of PFCs in the water was at or above what is commonly detected in residential wells. The water was run through the filter and samples of treated water were taken after 25, 50, 75, and 100 gallons had passed through the filter. This corresponds to 25, 50, 75 and 100 percent of the manufacturer's recommended capacity for the filter to treat 100 gallons. Tests were conducted on non-cblorinated and chlorinated water to determine if the presence of chlorine would affect the filter's performance. The Minnesota Public Health Laboratory analyzed the non-chlorinated samples; AXYS Analytical Services Ltd. analyzed the chlorinated samples. Results: All values in the tables below are in parts per billion (ppb). Non-chlorinated Water Chemical Untreated 25% of 50% of 75% of 100% of MDH drinking Reporting Method water filter filter filter fi~ter water advice Limit Detection EEEEe a [erPaFBsS To0o,021 PFBA 1.0 Etre 2 = PFHxS 0,03 1 wo Two | wo | No| capacity ND capacity ND capacity capacity ND i ND NN DD NN DD 0.0N1D3" ii &0nN2oD4~' | 77 7 o0,o0r7 1 000.055 0.05 000.02255 00m Limit 0,009 0.008 00.,000055 [peeT0075To No "Wo[no Ne 00s | oo [prPPoFFHOsxSA "025 0.075 0,25 1"wNNoDD TwoNNDD | NNNoDD 1i WNNoDD | o0oN.0E7r 100020,~002555 | 000.00,000177 ["erPFoOaA 1020.2s4 TwoN D "NoN D |" NNoD "i WoND | oor 0.07 |o00.303s5 | oot 0.O11_ [prPFePeaA Too0,t043s |WNoD |wNoD | wNoD |ji WNoD | NNEe | 000.055 | o0,0o09 ND = not detected above Reporting Limit NE = no criteria established These are estimated concentrations, detected beiow Reporting Limit but above Method Detection Limit 33669933..00000011 EExxhhiibbiitt 33669933 State of Minnesota v. 3M Co., Court File No. 27-CV-10-28862 STATE_07430527 el] Chlorinated Water Chemical Untreated water | 25% of filter 50% of filter | Me 75% of i 100% of filter i filter MDH or EPA drinking | Reporting Limit* E pros| 00798 EE "007 001 [ ............e .............r .............a ..N......o....s .......1 ......... wo ND. ND i nNND ......... 7 7 T......o .........0.m ..,.0...1........| ...... PFBS N D N D ND [prPeFBaA | 003.3661 [o0o.01t34|c0o.0s3t3.s5 [000,606335[ioo0.s09s5a4 | 77 |oo0,o00s5 | [prPFHsxS T--NNoD 17NNDD |"WNoD [NoND |["NNoD | 000.077 |" 00o,0~i. | | pPeFuNxxAa | 000.0226633 | NNoD |wNoD [wo ND [iNoND |" mNeE | oo0.s00s5 | .........~_~.f!_s.................#_:~.7_%.................... [!__D_......... ND ND i ND 0,07 O.O~L PFOA 0,0658 N D ND ND i ND PFPeA 0.0112 ND ND ND i ND 0.07 NE 0.005 0,005 ND = not detected above Reporting Limit (RL) NE = no criteria established *Reporting limits varied slightly for each sample (RLs for PFBS, PFHS, PFOS: 0.00899 - 0.00967 ppb; RLs for PFBA, PFHxA, PFOA, PFPeA: 0.0045 - 0.00484 ppb) The filter removed six of the seven PFCs to below the Reporting Limit and Method Detection Limit in all samples. In the non-chlorinated water, PFBA was removed to below the Reporting Limit in all samples; only small amounts were seen above the Method Detection Limit after 75 gallons of water were treated. In the chlorinated water, small amounts of PFBA were detected in all samples, buL the filter removed most of the PFBA. in all samples, the filter reduced PFBA to far below MDH's Health Risk Limit of 7 ppb. Conclusion: The test results suggest that this type of filter unit, when installed and maintained according to manufacturer's instructions, can effectively remove nearly all of the PFCs typically found in south Washington County groundwater to below detectable levels and MDH health recommendations. This was observed in non-chlorinated and chlorinated (city) water. Although PFBA did break through the filter, the amounts in treated water never exceeded (or even approached) levels of health concern. Disclaimer: MDH and MPCA make no endorsement of this product, This was one test of one filter from one manufacturer. Although the results are consistent with those from a similar test by M DH in 2007, the test isn't a comprehensive evaluation of the model tested or other similar filters. Results may vary between individual filter units and between different models or brands. We simply offer this information to people who may be considering buying a filter to reduce exposure to PFCs. Please note, carbon filters do not remove bacteria or nitrate, a common contaminant in Minnesota groundwater. MDH advises well owners to test their water annually for bacteria and nitrate, and provide treatment to address these problems if needed. Contact Washington County for sampling kits at 65:~-430-6655 or www.co.washington.mn.us!637!Water-Tests. Minnesota Department of Health - Site Assessment and Consultation Unit PO Box 649725, St, Paul, MN (zip} 55:1_64-0975 (phone) 655-20:t-4897 hazard.heal :h@state,mn,us www,health.state.m n.us January 20~_7 33669933..00000022 STATE_07430528