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^me/r 1/ <br />. '1 <br />:l ' -'J yt v: . i <br />- 7 i <br />mmy• <br />kik! imm^€^ <br />m a <br />y. <br />:f •'■■• <br />.., , >;-L <br />-i-i^ <br />Sr'-j'-'' <br />» <br />4r4 ''•wescta PoMion Control y^oency <br />(612) 296-7256 <br />January 26, 1977 <br />Mrs. Joan L. Carlson <br />2080 Shadyvood Road <br />Wayzata, Minnesota 55391 <br />EmBf 7 (A/ <br />Dear Mrs. Carlson: <br />Thank you for your letter of January 21 197 <br />tarboring a flock of either done“u and/or i ] <br />the use of aeration devices. There Is no douhf * Minnetonka through <br />due to the harboring of ducks In rtls coLfn^^^^'““““°'' »°»e degrM <br />ever, relatively small numbers of ducks and their'*/'®® 1 ’' '’® “''"ring. Ho»- <br />have an Insignificant Impact on th/overa?? "®®f““''« excretions would <br />'' ^®^*® '<»«»«etL^rff^at«fo„rf^^ ?f “®y« >•-''« <br />short term negative Impact with respect to water ”aUty ®'® <br />X dft“n* f«ortog^rte occuJrence of /i'"® eon- <br />Because waterfowl are one of the ^ dermatitis (swimmer’s itch). <br />tault form of shlstosom“. thf^ZrJn: oTa H®® ‘"“i' ®®"® ®® ® *»®‘ ‘he <br />lation of waterfowl in a littoral zone of « « non-domestic popu- <br />the outbreak of this follicular Lrmatltis! <br />anif Stage host, can be accomolisharf rh ° snail, which becomessulfate treatments in the affectarf L! through the use of cooper <br />permitted and in compliance with Denari* ‘=*'s®ical treatments must be <br />respect to the control o?“gHatlc ^Sisa:::,'/' '*®®°“"®®® °®'*®" <br />' ^f«ted''':rea“o‘^\®:r tas“t“n"^Us‘'*^® ‘®®®‘"®« to an <br />toxic to aquatic species, the Agencv staff*^/?/.'/' “PPer compounds aretoxic to aquatic species, the Agencv staff ^ copper compounds aic <br />as a solution to this problem *Ratha/?5^ Pt™ote this measure <br />a wild population of waterfowl could be Ln/ ?, “S"®®' *''** “*® tarboring of <br />nuisance and heilth related effects a/w!?? “/ P®®''®"‘ f*® cause Ifeffects as well as the degree of pollution Impact. <br />Regional “'""esofa 55113 <br />''•-tas.e,/ <br />.. <br />"1'ff* <br />ii <br />tf <br />i Ml <br />•-'/ <br />f <br />••«<1 <br />r, <br />♦ W *' <br />''iIs »> <br />Mrs. Jo <br />Page 2 <br />January <br />Ml <br />'A.. <br />Please <br />'.A'; <br />•> I <br />JGS:lib <br />cc; Mr <br />, .-V - *:■.:■'iV,