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HDD "Fact Sheet" <br />Geologic Anomalies <br />Fault — Presence not confirmed, more likely a dissolution and subsidence feature <br />• Fault or dissolution/subsidence "will have no impact" on the HDD project (JLA Geosciences, Inc.) <br />Sinkholes — Uncommon in the project area <br />• In this area "Sinkholes are few, shallow, of small diameter, and develop gradually." (USGS) <br />• No known sinkholes in project area <br />'Industry Experience - HDD <br />• In the past 10 years, 4,000+ ft. HDD crossings have become routine <br />• Number of 4,000 + ft. HDD Crossings: Estimated to be many thousands <br />• Number of 4,000 + ft. FPVC: 20 <br />Fusible PVC Pipe <br />• 16" DR14 AWWA C-900 Pipe <br />• Previous successful HDD installations of 7,000' and 6,600' <br />• Port St. Lucie: 2 @ 7,000' HDD of 32" diameter pipe <br />• 'Safe' or 'Allowable' tensile capacity of 176,000 lbs. <br />• Lab tested to 380,000 lbs. tensile limit <br />