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1987-05-27 Special Moss on Ponds WWTF ..~ . SPECIAL MEETING REGARDING MOSS GROWTH IN THE WASTEWATER TREATEMNT PONDS MAY 27, 1987 A meetIng regardIng the moss In cell three of the wastewater treatment ponds was held on FrIday, May 27, 1987 at 9:00 a.m. to dISCUSS wIth the CIty EngIneers what they had found out about treatIng the growth. Those present Included Gary Schwenzfeler (who left early), Don CornelIus (who came late), Maureen Andrews, Thor Meyer, Chuck Eberhard, and Ken LIndsay. . Chuck was asked what he had been able to fInd out from the Company, when he went down to Inspect theIr operatIon. He Informed everyone that they had try to sell the CIty. Duck Weed#saYlng that It would help take care of the problem. Chuck Informed them that the CIty was not Interested In the duck wee but wanted to fInd the best SolutIon for removIng the moss that IS growIng In the ponds, wIth Cell three beIng of greatest concern SInce It has the largest amount of growth actIvIty At thIS tIme Thor requested that he be able to make a statement. He stated that he feels that Meyer-Rohlln IS beIng played agaInst varIous people wIth regards to thIS problem. He stated that durIng the tIme It took to sucure the grant moneles and bUIld the pond system that the fIrm has stood wIth the CIty every step of the way. He remInded the group that alot of tIme and effort was spent resolvIng the problem wIth the lIner and settlIng the Llquated Demages agaInst PCI. He pOInted out that at some pOInt the ponds become the responsIbIlIty of the Wastewater Operato and need to be run by that person. He stated that he IS not ImplYIng that the fIrm IS not wIllIng to aSSIst In help solve the problem WIth the moss, but was Just remIndIng the group that the operator wIll run the ponds the way he feels IS the most comfortable WIth. Thor agaIn wanted to stress that It not the IntentIon of Meyer-Rohlln that they get between the partIes Involved WIth the Wasterwater Treatment FaCIlIty, that IS the CouncIl, Ken and the state and federal agencIes Involved WIth the constructIon of the ponds. Ken LIndsay stated that he IS not trYIng to play the engIneers agaInst the other partIes Involved, but feels that he IS on such a tIght tlme- frame that the problem needs to be resolved so that he wIll be able to dIscharge once more before the permItted tIme has elapsed. . '. MEETING MINTUES PAGE 2 . Chuck stated that the ponds were des~gned as 6 acre feets, that lS 1 foot of water for every acre of area, and that each cell has 4 foot of storage. When mult~ply~ng these two f~gures together each cell has 24 acre feet of storage ~n each cell. Ken sa~d that he has calculated the ant~c~pated flow for th e summer and bel~eves that he w~ll need 5 acre feet of storage, wh~ch he would have ~n one pond. There was some d~Scusslon regard~ng we~ther or not ~t was necessary to d~scharge the ponds for the second t~me. Chuck stated that ~s may not be that ~mportant to d~scharge at th~s tlme, because he felt that the ponds could handle the summer flows. The d~scuss~on then focused on the moss problem and what should be done wlth It. There was some d~scuss~on regard~ng how the moss behaved depend~ng on the weather and w~nd cond~t~ons. There was some d~scuss~on regard~ng whether or not the moss was ~n all three cells or lf ~t was ma~nly concentrated ln cell three. If the growth lS ~n cells 1 and 2 then there w~ll need to be a chemlcal klll ln those cells as well. . It was agreed that a chemc~al k~ll w~ll llkey lncrease the BOD levels, the suspended sol~ds and the PH levels. But by allow~ng lt to settle out for 10 days the levels should go back down to normal levels. Gary Schwenzfeler asked why Chuck went down to the Lemma Company Slnce Ken knew what the name of the moss was and how lt should be treated. Chuck sa~d that the company would want to come out and look at the moss to be sure that they had the rlght growth name so that they could determ~ne what was the best method to k~ll it. Gary stated that he d~dnlt know why no one would take anyone's word anymore. Thor agreed that lt ~s unfortunate but tak~ng someone's word for someth~ng can lead to negatlve results. Opt~ons regard~ng what should be done w~th the moss ~ncluded the poss~bl~ty of harest~ng the growth f~rst and then k~ll~ng the remalns w~th a chem~cal or gOlng dlrectly to a chem~cal klll and trYlng to get rld of as much of the dead moss before lt s~nks to the bottom of the pond. It was agreed that the best tlme to try try the chemlcal k~ll would be after the the transfer from cell two to cell three was complete, but that lt would have lmpact on the levels,dlcussed earller. . Ken sald that he had gotten some prlces for havlng the pond harested and then treated wlth chemlcals. Chuck lnformed the group that the Lemma Company had glven hlm a ball park f~gure of $3,000.00. Ken's breakdown lncluded the use of the harest~ng mach~ng, the operator, the chemlcals, demoblllzat10n and travel tlme. The flgure Ken recleved from the same company came ln a l~ttle over $2,500.00 wlthout the flrm havlng seen the pond condltlons. Ken also got prlces from Feed-rlte and Lake Management for Just chemlcals. The prlces he got from these two flrms were $364.00 from Feed-rlte and $225.00 from Lake Management. (these prlces do not lnclude any harvest~ng of the growth. <. e e . .. . ~ MEETING MINUTES PAGE 3 There was a questlon regardlng the long term effect of the chemlcal klll. There IS no sure answer because It depends on whether or not the moss 1S all k1lled the flrst tlme, what happens to the dead mater1als that slnk to the botto, of the ponds and could the problem occur other years. It was agreed that the C1ty would need to look Into cells one and two to see If the problem eX1st 1n them as well. Ken stated that he would llke to go out 1nto the ponds on Tuesday, May 26, 1987 to Inspect them. The quest10n was asked If these was an advantage to harvestlng the moss before the klll and It was agreed that there was not a clear cut answer. It was agreed that then the Clty should be looklng at a chemlcal k1ll as the flrst opt10n S1nce 1t 1S far less costly and could very eas1ly take care of the problem. They stated that they could be 100k1ng at mak1ng the klll as early as Thursday or fr1day (May 28 or 29) for d01ng the work. Two other 1ssues dlscussed 1ncluded the pump and PPM. Ken Informed the group that feed-rlte was sendlng back the pump after hav1ng reshaped the 1mplerers so that they w1ll work properly. Once they are back 1n Ken w1ll be able to determ1ne 1f the problem has been coreected. f1nally, Chuck 1nformed the people present that the meet1ng set up w1th the PPM represenat1ve was cancelled by PPM and had not been rescheduled. ~~ '-YY( a~oftL I ~ ~\z..-