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Agenda 03/31/2014 PELICAN BAY SERVICES DIVISION Municipal Service Taxing and Benefit Unit NOTICE OF PUBLIC MEETING MONDAY, MARCH 31, 2014 THE LANDSCAPE & WATER MANAGEMENT COMMITTEE OF THE PELICAN BAY SERVICES DIVISION WILL MEET MONDAY, MARCH 31 AT 3 PM AT THE PELICAN BAY SERVICES DIVISION OFFICE LOCATED ON THE THIRD FLOOR, SUITE 302 OF THE SUNTRUST BANK BUILDING, 801 LAUREL OAK DRIVE, NAPLES, FL AGENDA The agenda includes, but is not limited: 1 . Roll call 2. Agenda approval 3. Audience comments 4. Review lake pollution status 5. Legal standing in Commons project 6. Adjourn ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO ONE (1) MINUTE PER ITEM TO ADDRESS THE BOARD. THE BOARD WILL SOLICIT PUBLIC COMMENTS ON SUBJECTS NOT ON THIS AGENDA AND ANY PERSON WISHING TO SPEAK WILL RECEIVE UP TO THREE (3) MINUTES. THE BOARD ENCOURAGES YOU TO SUBMIT YOUR COMMENTS IN WRITING IN ADVANCE OF THE MEETING. ANY PERSON WHO DECIDES TO APPEAL A DECISION OF THIS BOARD WILL NEED A RECORD OF THE PROCEEDING PERTAINING THERETO, AND THEREFORE MAY NEED TO ENSURE THAT A VERBATIM RECORD IS MADE, WHICH INCLUDES THE TESTIMONY AND EVIDENCE UPON WHICH THE APPEAL IS TO BE BASED. IF YOU ARE A PERSON WITH A DISABILITY WHO NEEDS AN ACCOMMODATION IN ORDER TO PARTICIPATE IN THIS MEETING YOU ARE ENTITLED TO THE PROVISION OF CERTAIN ASSISTANCE. PLEASE CONTACT THE PELICAN BAY SERVICES DIVISION AT (239) 597-1749 OR VISIT P.ELICANBAYSERVICESDIVISION.NET. 3/28/2014 10:05:24 AM OUTLINE FOR 3/31/14 LANDSCAPE & WATER MANAGEMENT COMMITTEE MEETING Problem In 10/12,the Florida DEP rated Clam Bay "impaired for copper" and gave Pelican Bay five years to come up with a remediation plan. 1.5 of the 5 years have now passed.Where do we stand? II. PBSD Approach A. Our approach has been,not just to come with a plan, but to fix the problem. We don't want our waterways to remain polluted. B. Strategy • Community awareness - Reduce fertilizer usage Status: Presentations largely complete • Switch to non-copper algaecide Status: Completed in 8/13 • Pilot trials to determine best treatment for reducing algae buildup Status: Trials in progress • Apply best treatment to all lakes • Deal with residual copper if necessary C. Best Outcome • Nutrient levels fall in lakes • Lake treatments (best of pilots) hold down algae growth • Dissolved copper goes into sediment, and no more copper enters Clam Bay • Copper already in Clam Bay is flushed out to sea Slides 1 —6 III. Current Status (including 2/14 data) A. Nutrients (dissolved nitrogen and phosphorus) • Nitrite/nitrate and total nitrogen levels are essentially unchanged (Table 1) Continued high fertilizer usage? Irrigation run-off problem? 4.3 mg/L nitrite/nitrate in recycled water vs 0.20 mg/L average in lakes • Phosphorus levels are down (Table 2) Reduced fertilizer usage? Not an irrigation run-off problem? 2.0 mg/L TP in recycled water vs 0.07 mg/L average in lakes B. Status of pilots (qualitative reading,based on reduced algae build- up and amount of algaecide needed) • Best results from use of aeration + bacteria + plantings (Table 3) • Correlation with copper,but not with nutrient levels (Table 4) • Treatment mechanisms (Slide 2) • Adequate levels of aeration,bacteria,plants? C. Copper • Reduced from spring/summer of 2013 in 33 of 44 lakes tested (75%), but still high (60-199 g/L) in 19 of 44 lakes tested (43%) • High levels (61-184 /L) in 8 of 13 private lakes tested • No correlation of copper with nutrient levels,upstream vs downstream lakes or pH over 6.8-8.5 range • Soluble copper and sediment-bound copper may have reached equilibrium (Table 4) D. Conclusions (tentative) • Not all associations are following BMP in fertilizer usage and/or are over-irrigating or are being careless with irrigation run-off • Aeration+ bacteria + plantings best reduces algae build-up (although high copper levels cloud results) • Copper remains high in many lakes, especially in private lakes, suggesting some associations still use copper • Equilibrium between soluble and insoluble or sediment- bound copper has been reached in many lakes,leaving high levels of copper available for washing into Clam Bay IV. Possible Next Steps • Follow-up letters to all associations to point out dangers of over-irrigating and with mail-backs for responses on whether fertilizer BMP is being followed? • Follow-up letters to associations with private lakes with mail-backs for responses on whether copper is still being used? • Begin work with Foundation on policy mandating fertilizer BMP? • Start regular monitoring of copper in sediment, perhaps at 10-15 test lakes? • Fund sediment study at FSGU? • Hire expert for coordinating entire project? • Others? 1..:."i.'.-.::-..,•.:- .-. .''*.'•"•..•::,:,'....---: .s;.'•-.•::•--',',.,;.'-::•...-:•,... :;.:::......,:::.,..ff.:•,*',,,:;•:::::::::•1.:".:*:;::::.•:::,....,42-5.553,44VW4;:•.;%Z.4"•%Vrifrittez....,:V,^,',,,,?...,(r .n1.4..1:•,. ..:VN","...\trx..,..4,..-:4•,•x•f.,',:•7-.,.,,...V,..•4-0,-.f,;;,•:.;•,7-• .,.,,,,,,,.,,:.,,:,.,...,,,,,.,,,,,,.,„•.:,,,.,,,,,.,,,,,:„..„,,.,,,..t.,„„,,,,.:,,,,,.,..,,,,,-..„,...:„.,„%,,„,,,,...„,..,,,„..„,..,;:,,..,.,;.:,;;;;NX;:;;;;;M:liWq:Wq4:1:aaeolAWAZ-feaN;kraVerW,KIF.ORrnik44,M1;r:re,aiWiePla':.?t.i$R6:%•54'.IM24";.,Wiri +•'i•':•::.,:'::i.'%i°:Ri•::.:i%:.'','k:',,:i••.:!:•.:::,.:•,':',i.i..:;.•i:.':i.ii•ii'i'',:i•i'i::'iSiii:i%i•i:ii,,i•:::',!:1.'ii'i i•Y:'1:i•i.i• i;i:,:i*M•i'',1::•i'i.!,'•:iki'';')*-Vpa5V50:5,P5F,;01,WW.0,e4:40,A;:;MI?,4?rtkiOtg:?ilz::r.::;,+:',3kte.,VP#M,r•-:41P,M1.M.Oggi.1:10,4atlp,'.".'''Al•;',1 ,.•:,•:':'%:':::':,':':,..,:':•::',::',.,i'::'%'',:::.:::::,..Nt:';';1.:•;;:!.1'2::.i!Yr•:::•:•;:'i,4:•;':,:';:P.I'%;•'•,.]:':,:i'l';';'1',•;a:,:•;*;.:•;•:q;:ii,;•'N>::1•:.:•;::i:',;:,,, ,...,f:Pyr,l' Pr.Ek•rW,Mr:Z,1•,k,': ,;:.,:,;.:zet+,:,On:•..:;::::.::0:;;.■:'•4.•., .•af:.:W.:r44%,f,tr:r,f:4I,kle:;.:•*:'%!..IX:VI ..ka, . 4,sJ,,,,,I . . .. .i-:','.,f of:'::...,'.1%.','N:;':,...•:',:::.%:',.'...::.:,:,..::,.iN J.',....::?:',:;:,:.:;':,.'..::::.;...n.:.:1':.;:::'::';.::::%:.,:1,:,>=V,-a"-:410e.VV.0.8%4"0":13V,,v .W.er,',Vz.m.WM7,t. 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' ' " �ti�' \ \\b SC AkitrI \ � ,& .� f�g iso' �f *�s• t Zh ,` ..:z Table 1 NITROGEN LEVELS IN LAKES — Nitrite/Nitrate Levels (mg/L)-- Basin 3/13 8/13 11/13 2/14 1 • 0.33 0.16 023 0.21 2 0.16 0.24 0.12 0.17 j 3 0.46 0.19 0.18 0.35 4 0.33 0.25 0.04 0.11 5 0.04 0.05 0.07 0.06 6 0.01 0.03 0.002 0.08 j Average 0.26 --� 0.18 —9. 0.13 —9- 0.18 Table 2 PHOSPHORUS LEVELS IN LAKES — Total Phosphorus Levels (mg/L) Basin 3/13 8/13 11/13 2/14 1 0.17 0.07 0.06 0.03 2 0.09 0.17 0.10 0.03 3 0.33 0.28 0.29 , 0.18 4 0.16 0.18 0.12 0.07 5 0.19 0.21 0.65*• 0.06 6 0.46 0.08 0.26 0.04 Average 021 --b 0.18 d--9 0.11 •----r 0.07 .* Outlier, excluded from average Table 3 RATINGS OF TEST LAKES BASED ON ALGAE BUILD-UP* Best of Test Lakes 3-4 (Golf course) Aeration,plants, bacteria Second Best of Test Lakes, 3-8 (Golf course) Aeration, plants,bacteria 3-9 (Golf course) Aeration, plants, bacteria Somewhat Better Than General Lakes 3-3 (St.Andrews) Aeration,bacteria 5-3 (Avalon) Floating islands No Better Than General Lakes. 3-2 (Las Brisas) Aeration,plants 1-4 (Crayton) Aeration 4-1 (Oakmont) Bacteria 2-1 (Ridgewood) Plants Six-month reading (Feb. 2014), based on visual examination of algae build-up and amount of algaecide needed to eradicate Table 4 NUTRIENTS & COPPER IN PILOT LAKES Nitrite/Nitrate* Total Phosphorus* Copper** Best of Pilot Lakes 3-4 0.75 0.19 114 2nd Best of Pilot Lakes 3-8 0.84 0.09 134 3-9 0.48 0.29 199 Somewhat Better Than General Lakes 3-3 0.002 0.12 68 5-3 0.002 0.02 33 No Better Than General Lakes 3-2 0.02 0.09 31 1-4 0.14 0.02 25 4-1 0.44 0.10 16 2-1 0.002 0.03 552*** * mg/L (2/14) g/L (2/14) *** Likely outlier Table 5 COPPER LEVELS Copper5ug/L) Basin 3/13 8/13 11/13 2/14 1 76 20 48 49 2 294 57 46 134 3 163 31 C36) e 4 408 73 58 59 5 102 157 31 • e 6 4.6 3.0 3.4 02.7 Between 11/13 and 2/14,measurable copper ... - Declined noticeably in 10 lakes - Remained about the same in 24 lakes - Increased noticeably in 10 lakes IS^ M fn r 'O N r1 • 71C.3.,� m V\ r, a L.L.LL a w m J +1 N i O ,� G,Co CO V N - CEO C co cn V J CCI '''yyyL � � N CO CO v1 N CO O CO GO N t---.' . 2 :°� M QC .4 kk, ; ccnn o O 0 O oo C O �IQ, F, c i S a CO V'1 r, M r'1 Gl CO a^fn %, .„ ^ — Y e.) 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