Engineered Aquatic Filter Barrier Systems

1. Engineered Aquatic Filter Barrier Systems SAS Developmental History • First used by Underwater Construction, Inc. in Alaska during the late 1980’s to surround ship demolition projects & harbor deepening detonations. • Intended as suspended sediment & debris control booms, observations indicated a certain level of attenuation resulted by the nature of the fibrous material.

3. Caltrans Pile Driving Installation Project (PDIP) Location:Oakland Bay, Calif. Problems: Concussive force of driving 8 ft diameter piles deleterious to fish populations. Damaging affects occur at 190 dB for marine mammals, fish, as low as 170 dB for fish with swim bladders. Engineered Aquatic Filter Barrier Systems

4. Engineered Aquatic Filter Barrier Systems MENCK MHU 1700 ~1.2 Million Ft Pounds Hammer for Driving 8’ Piles

5. Engineered Aquatic Filter Barrier Systems GUNDERBOOMTM Sound Attenuation Framed-Support Assembly

6. Engineered Aquatic Filter Barrier Systems Top view of installed system

7. Engineered Aquatic Filter Barrier Systems Operational View

9. Performance of Caltrans GUNDERBOOM System

10. Engineered Aquatic Filter Barrier Systems

11. Technology Application Summary Effective suppression of explosive shock waves. Demonstrated attenuation of Pile Driving sound energy. Adaptable for various applications, frequencies and pressure ranges. Low cost in relationship to suppression and attenuation levels achieved. NEXT STEP: Demonstration Program Engineered Aquatic Filter Barrier Systems

12. Engineered Aquatic Filter Barrier Systems Prototype SAS Development

13. SAS Prototype Objectives Reusable rugged design Works in high current velocity areas Consistent broad range frequency protection Minimal additional support equipment needed in field applications Ease of field installation for batter and vertical pile driving applications Engineered Aquatic Filter Barrier Systems

14. SAS Prototype Test Layout Engineered Aquatic Filter Barrier Systems

15. Engineered Aquatic Filter Barrier Systems Prototype SAS 10kHz Results

16. 10 kHz SAS Results Engineered Aquatic Filter Barrier Systems

17. SAS Prototype Results (cont’d) Calibrated for 10 kHz sound source – based on test tank size Average of over 43 dB reduction at a Source Level of 174 dB re mPa @ 1 meter Overall sound reduction flowing Transmission Loss adjustment of over 95% Testing by Chase Ocean Engineering Laboratory at the University of New Hampshire

18. Endnotes 1John Pike, Robert Sherman, (http://www.fas.org/man/dod-101/sys/ship/acoustics.htm#sound, page 1-2, April 19, 2005) Sources and Resources: Adapted from AN INTRODUCTION TO UNDERWATER ACOUSTICS SiD Sonar Control a Sound Library collecting and exhibiting sound data of Submarines and other Naval/Maritime issues! Introduction to Naval Weapons Engineering Underwater Acoustics Environment and SONAR Performance SONAR Systems Fundamentals of Naval Weapons Systems Chapter 8 Principles of Underwater Sound Chapter 9 Underwater Detection and Tracking Systems Towed Array Sonar System Seasonal Variation in SVP's Environmental Support Package Near Real Time Analysis 2Ibid., p. 2 3Ibid., p. 3 4Ibid. 5Ibid. 6Ibid., p. 4 7Ibid. 8Ibid., p. 5 9Ibid., p. 6 10Ibid., p. 7 11Ibid., p.7-8 Engineered Aquatic Filter Barrier Systems

19. Endnotes 12California Department of Transportation (Caltrans), Fisheries Impact Assessment, San Francisco-Oakland Bay Bridge East Span Seismic Safety Project, Pile Installation Demonstration Project, August 2001, p. 21. 13Ibid., p. 23. 14Ibid., p. 21 15Ibid., p. 22 16Ibid., p. 23 17Ibid. 18Ibid., p. 24 19Ibid. 20Ibid., p. 25 21Ibid., p. 26 22Ibid. 23Ibid. 24Ibid. 25Ibid. P. 21 26National Academy of Sciences, Ocean Noise and Marine Mammals, (http://www.nap.edu/catalog/10564.html), March 24, 2005, p.87. 27Ibid., p. 90. 28Ibid., p. 86. 29Ibid., p. 96. 30Gettle, Accoustic/Shock Wave, Gettle, 7/6/1993 31Lance L. Trasky, Alaska Dept. of Fish & Game, Environmental Impact of Seismic Exploration and Blasting in the Aquatic Environment, 2000, p. 2. 32Ibid., p. 12. 33Peratrovich, Nottingham & Drage, Inc. (PND), Technical Letter Report Regarding the San Francisco-Oakland Bay Bridge East Span Project Noise Energy Attenuation Mitigation, 2002, p. 4. 34Ibid., p. 5. 35La Prairie Engineered Aquatic Filter Barrier Systems

20. Engineered Aquatic Filter Barrier Systems 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