Taylor Creek Algal Turf ScrubberTaylor Creek Algal Turf Scrubber®® (ATS(ATS™™) Nutrient Recovery Facility) Nutrient Recovery FacilityPerformance Review (Jan 2007Performance Review (Jan 2007-- Aug 2008)Aug 2008)

22

TCTC--ATSATS™™ Operational SummaryOperational Summary

Operation began in late Operation began in late January 2007January 2007Severe drought which ended in Severe drought which ended in early July 2007 impacted early July 2007 impacted startup operation and system startup operation and system performanceperformanceAlgal dieAlgal die--offs in September offs in September 2007 and May 20082007 and May 2008Investigations of water quality Investigations of water quality conditions and operational conditions and operational parameters initiated in July parameters initiated in July 20072007Causative factors remain Causative factors remain unidentified unidentified

33

TCTC--ATSATS™™ Performance SummaryPerformance Summary

Phosphorus removal performance remains below projections Phosphorus removal performance remains below projections (Projected TP Load Removal = 4,000 lbs/yr)(Projected TP Load Removal = 4,000 lbs/yr)Huge disparity between water qualityHuge disparity between water quality--based and solids based and solids recoveredrecovered--based TP load removalbased TP load removal

Phosphorus Removal Summary January 2007 through December 2008

569.95

105.780

1000

2000

3000

4000

5000

1/28/200

72/5/200

72/19/2

0072/26/2

007

3/11/2

0073/19/2

0073/26/2

007

4/8/2007

4/16/2007

4/23/200

75/7/200

75/2

1/2007

6/3/20

076/1

1/200

76/1

8/2007

7/2/20

077/9/200

77/1

6/2007

7/29/2007

8/6/2007

8/13/2

0078/26/2

0079/4/200

79/1

0/2007

9/23/2007

10/1/20

0710

/7/20

07

10/15/2

00710

/22/200

711

/4/20

07

11/12/2

007

11/19

/2007

11/29/200

7

12/10/2

00712

/17/20

07

12/27

/2007

1/6/20

081/13/2

0081/2

0/200

8 1/28/2

008

2/4/2008

2/17

/2008

2/25/200

8 3/3/20

08 3/

10/200

8 3/23/2

008

3/31/2008

4/14/200

84/2

8/2008

5/12/2008

5/26/200

86/9/200

86/23/2

0087/7/200

87/2

1/2008

8/4/20

08

11/10

/2008

11/24/200

812/1

5/2008

Date

TP lb

rem

oved

TP Cumulative Load Removed Based Upon Total Solids Recovery Calculations lb

TP Cumulative Load Removed Based Upon Water Quality Calculations lb

Projected TP Load Removal – 4,000 lbs/yr

44

Results of Investigations on TCResults of Investigations on TC--ATSATS™™ Reduced PerformanceReduced Performance

No improvement in treatment performance No improvement in treatment performance with reduced Linear Hydraulic Loading Ratewith reduced Linear Hydraulic Loading RateNutrient supplementation did not enhance Nutrient supplementation did not enhance algal productivityalgal productivityTests addressing analytical discrepancies Tests addressing analytical discrepancies yielded no conclusive resultsyielded no conclusive resultsCollaborative work with UFCollaborative work with UF--IFAS and FDACS IFAS and FDACS has not identified with certainty which has not identified with certainty which factors are interfering with turf production factors are interfering with turf production and nutrient removaland nutrient removal

55

WhatWhat’’s being proposed?s being proposed?

Continue investigation of water quality Continue investigation of water quality conditions impacting treatment performanceconditions impacting treatment performanceFocus investigation on identification of Focus investigation on identification of substances deleterious to TCsubstances deleterious to TC--ATSATS™™performanceperformanceHydromentiaHydromentia will focus on identifying the will focus on identifying the agent or causative factor inhibiting algal agent or causative factor inhibiting algal growthgrowthHydromentiaHydromentia will produce a final report will produce a final report describing their investigation and describing their investigation and information gained from 3 years of operationinformation gained from 3 years of operation

66

ResolutionResolution

A Resolution of the Governing Board of the South A Resolution of the Governing Board of the South Florida Water Management District to authorize an Florida Water Management District to authorize an amendment to contract 3600000952 with amendment to contract 3600000952 with HydroMentiaHydroMentia, Inc., for one additional year of , Inc., for one additional year of operation and maintenance of the Taylor Creek Algal operation and maintenance of the Taylor Creek Algal Turf ScrubberTurf Scrubber®® Nutrient Recovery Facility, and Nutrient Recovery Facility, and authorize a Sole Source Procurement as an authorize a Sole Source Procurement as an exception to the general standards of competition, to exception to the general standards of competition, to extend the term from January 31, 2009extend the term from January 31, 2009 to January to January 31, 2010, and to increase funding in the total amount 31, 2010, and to increase funding in the total amount of $300,000, for which Ad Valorem funds are of $300,000, for which Ad Valorem funds are budgeted; providing an effective date. (Contract budgeted; providing an effective date. (Contract Number 3600000952Number 3600000952--A03) (David Unsell ext. 6888)A03) (David Unsell ext. 6888)