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WATER GREMLIN PUBLIC HEALTH ASSESSMENT; PUBLIC comMEN.T DRAFT <br />B. Stress ..................... :....:.....:....................... :........ :.....:..:............. .................... ........ :........................ 48 <br />C. Cumulative Risks...........................................:........:....................................:.:...I......a..................49 <br />IX. Conclusions ........ ........ ::................. ...:............... ........................................................................ ..P...-50 <br />X. Public Health. Action Plan ..............................................................................................It-,..............52 <br />XI. References:. ........... ....................... ............ ............... ,............................... .................................._S3 <br />Appendices.........,................................................:::........:t.......,:....:..:.::...........;.....................;.....:.........57 <br />Appendix A —Water Greiniin Location Map .... ..:....................:....:.................:.......... :......:....... :......... 57 <br />Appendix B - 2009-2018 TCE-In Air Maps., ... 4 ...... ........ ...... ... 58 <br />Appendix C-Cancer Risk Assessment Calculation.... ...... :Y... ..............:........:.:..:.:...............................70 <br />Appendix D -1,4-Dioxane in Private Wells —Gem lake and the White. Bear Area .............................72 <br />Appendix E - Water Gremlin. Facility — TCE:in Indoor Air Notification ................. < ............................... 4 <br />Appendix 1 -- Cancer Occurrence Report for -White Bear Township, White Bear Lake and Gem Lake <br />Area Five Census Tracts, 2.007-2016.......... .................................................. ............... ....................... 75 <br />Appendix.(Y- Community Health Studies and:EnVironmentai Contamination ............ ....... ................ $a <br />Figures <br />Figure 1: Estimated tons-df TCE emitted 2002-2018... ................................... :.........:....:....... Y............ .........8 <br />Figure 2: Reported tons ofTCE-emitted.—Toxics Release Inventory1992-2001............ . ...... ::..:.....:............. 9 <br />Figure 3: Map of the area potentially affected by TCE—distributed-in february 2019 ............................10 <br />Figure 4: Locations of Air Monitors around the Water Gremlin FAclliity........ .............. : ...... :............. <br />.:...:.:.17 <br />Figure S: TCE in Groundwater Sampling Results.....:...........::..............:....::::.................:..................,.::.....1.24 <br />Figure 6: 1,4-Dloxane WGroundwaterSarnpling Results:....:..................................................................... 25 <br />Figure 7: Leapt in Soil Sampling. Results..::............:......:.:.:........................:..............:.:....:........................... 27 <br />Figure 8: TCE.and t* DCE*in Sol[ Vapor SarpPling.Resuits....,.............. ............................ <br />..........:.:....:.........:..29 <br />Figure-9: Lead-in Sediment Sampling Results .............. ..................... ............... .,...,......... <br />:......:......:..........31 <br />Figur..e 1b; Lead in Surface Water Sampling Results...........................................................................;33 <br />Figure.11: 2020-202f Private Well Testing Results for 1)4-6Dloxane.............................................................38 <br />Figure 12: . Study Area for the Cancer Occurrence Report...:............:........:..............................................:42 <br />Figure 13: Zip Codes Where Blood Lead information -System Data was Evaluated ............ ........... .......... .:4S <br />Tables <br />Table 1: Understanding TCE Air Concentrations ......................................... ................................ •.•....... <br />.....1i <br />Table 2: t-D.CE Air Monitoring Results -on. Water Gremlin Property frorrf 3/1/19 to 8/22/19 <br />Table 3: EDGE Air Mpnitoring Results on the Water Gremlin Property.......::.: <br />Table 4: t-DCE Alr Monitoring Results at:Birch Lake Elementary.and.ColumOie-P.ark Priorto Shut -Down <br />ofCoating LlheS(Ng/m3)........................ ......... ,:....... ......,.................. ......... ........ .................................. ......... is <br />Table 5; E-DCE Air Monitoring Results at Birch Lake Elementary ........... ........... :................ ::........ ......... ....18 <br />.Table 6: MbOlsk Assessment Adulce (RAA) fortrans-1,2-131chloroethylene...........:....:.....19 <br />Table 7: Remedial Investigation Activitlet-2019=present:.............. ,..................... .........l............................; 1 <br />Table3: Intrusion Screening Values forTC15-and t-DCE........................ :...:....,.,..::.:......... ....:...... ......... ....... 28 <br />Table 9: Years of 1,4-dioxane sampling of municipal drinking water:..........................::.....:...........::...:....3ti <br />