Aquatic Filter Barrier Technology and the Marine Life Exclusion System

1. Aquatic Filter Barrier Technology and the Marine Life Exclusion System Application for Catskill Upper Effluent Chamber Intake Part II. Project-Specific General Approach

2. Kensico MLES Preliminary System • Part I of this Presentation provides an introduction to the Gunderboom Marine Life Exclusion System (MLES) as an application of Gunderboom, Inc.’s Engineered Aquatic Filter Barrier Technologies. • Part II of the Presentation provides considerations more specific to the Catskill UEC Intake. • The ideas were developed by Gunderboom, Inc. for the use of the internal Catskill UES Intake Project Team to understand a possible approach using Gunderboom Aquatic Filter Barrier technology to exclude fish, fish eggs, fish larvae and debris from the Catskill UEC intake.  The general conceptual approach should not be assumed to represent an actual design concept.  Development of preliminary design concepts for consideration by the Project Team will require that a Gunderboom engineering and design team assess available data and information on the local area of the reservoir, such as water depth profiles, bottom type, general flow and wind patterns), and conduct engineering calculations and develop alternative feasible alignments. •  The information presented here should not be used for any permitting considerations and is considered by Gunderboom inadequate for any other purpose than to explain the anchored, floating curtain MLES concept for consideration. Development of the design will be required to address specific questions and issues of how this specific MLES would operate, how it would be installed, how it would handle debris and icing and other similar questions.

3. Kensico Reservoir Application Kensico Marine Life Exclusion System Catskill Upper Effluent Chamber (UEC)

4. Kensico Reservoir Application Kensico Marine Life Exclusion System Requiring 1,000 MGD, the Catskill UEC intake in the Kensico Reservoir is a good match for the curtain-style MLES with the type of environment and water body available at the site.

5. Kensico MLES Preliminary System • Preliminary Concept - Design Basis • 1,000 MGD maximum instantaneous flow rate • Fabric AOS of 0.5 mm (may be larger if acceptable) • Flux of 7.5 gpm/sf of fabric • Average depth of 40 vertical feet • Length may be approximately 2,300 lf • Fabric composite to include non-woven and woven • AirBurst™ cleaning system with redundant supply and automatic controls • Control System, includes remote monitoring and operation capability • Preliminary ballpark cost range - $2.5 – 6M

6. Kensico MLES – Key Design Aspects • Key Design Factors/Considerations • Size of organisms to exclude • May affect design flow rate and therefore size • Non-intake flow and currents in vicinity of alignment • Bottom conditions for anchoring system • Loading, buoyancy, anchoring and load on curtain • Restrictions on bypass – any seasonal considerations • End terminations • Ambient aquatic flora

7. Kensico Reservoir Application Kensico Marine Life Exclusion System 2,300 Foot Curtain – Representative Possible Alignments. Actual length will depend on depth profile information not available at this time

8. Kensico MLES Next Steps • Gunderboom Phase 1, Preliminary Conceptual Design and Feasibility Study includes: • Review of Site Information, Design Requirements • Development of Design Concept or Concepts • Determination of Additional Engineering Data Requirements • Development of Project Task Sequence and Estimated Budgets • Phase 1 estimated range – $25-40 K plus site visits and meetings

9. The Marine Life Exclusion System – Key Benefits • Excludes small and large organisms and debris • Accepted by regulatory agencies; proven results • Operates automatically; passive operation with monitored parameters; supported by remote access • Continuous system monitoring and performance monitoring • Warnings and alarms to alert any required action • Trend monitoring to anticipate problems before they occur • Built-in safeguards, fail-safe design elements • Construction goes beyond design loads and design requirements • Extra layer of filter material continues exclusion if a tear occurs • Operates continuously during maintenance activities

10. Gunderboom Patents • Floating Containment Boom PCS Patent No. 5,102,261; Containment/ Exclusion Boom and Methods of Using the Same (MLES) Patent No. 6,485,229; Containment/ Exclusion Boom with Bird Deterrent U.S. Patent No. 6,514,010; Boom System and Its Use to Attenuate Underwater Sound Or Shock Wave Transmission Patent No. 6,567,341; Panel Anchoring System For Boom Installation U.S Patent No. 6,848,861; Boom Curtain with Zipper Connections and Method of Assembling Boom Patent No. 6,739,801; Boom Curtain with Expandable, Pleated Panels, Containment Boom Containing the same, and Use There Patent No. 6,743,367; Containment/ Exclusion Barrier System with Infuser Adaptation to Water Intake System U.S. Patent No. 6,843,924; Attachment for use With Stockpiling Barge and Method of Filtering Runoff Water Therefrom (Gundersock) U.S Patent No. 6,857,819; Patents Pending