Las Gallinas Valley Sanitary District 588 kW Solar System

1. Las Gallinas Valley Sanitary District 588 kW Solar System Megan Clark Board of Directors North Bay Watershed Conference April 2008

2. Las Gallinas Valley Sanitary District • 588 kW system • Over 2 acres of PV • Project sited in environmentally sensitive wetlands area • Grade Beam Engineering Solution implemented as soil was “bay mud” bed rock 30-90 ft depth

3. Background on LGVSD • Located on the shores of San Pablo Bay • Provides sewer service to over 32,000 residents of Marin county • On Average treats 3.56 million gallons of wastewater per day

4. Why Solar? • LGVSD treats over 3.5 million gallons of wastewater everyday • Power costs for pumping were draining the district’s budget • Wanted to off-set 90% or more of the electrical power needs

5. Genesis of the LGVSD Solar Project • How did it come about? • How long did it take to get approval? • Was the community involved in the decision?

6. Las Gallinas Valley Sanitary District–588 kW San Rafael, CA 6 Company Confidential

7. Results • Off-setting over 90% • Savings = $156,000 annually • Positive publicity • Improved landscape • New community asset: Wildlife refuge and trail system

8. Results – Cont. • Electricity prices have risen 24% since inception of the solar system: $.124/kWh $.154/kWh

9. Savings = Funding for Necessary Repairs • Half-Century Old Pipes Require Repair • Repair funding = $625,000 annually. • Reduction in electricity costs contribute to funds for repair

10. Ground Mount: Las Gallinas Valley Sanitary District: San Rafael, CA System Size:588 kW Energy Output: 1,035,519 KW Savings: $156,000 Annually Results:CO2 emissions reduced by 1,442,281 pounds/year is equivalent to 1.7 million car miles/year 10 Company Confidential

11. Thank You