Solar PV PPASolar PV PPA ProjectProjectjj

MBE OutreachMBE OutreachMBE OutreachMBE Outreach

May 12, 2011

Rob TaylorEnergy Manager

WSSC Service Area( ) (2) Water Treatment Plants(Maryland) (2) Water Treatment Plants

(5) Wastewater Treatment Plants

(12) Water Pumping Stations

MontgomeryMontgomeryMontgomeryMontgomeryMontgomery

(50) Wastewater Pumping Stations

(10) Field Offices/Lab/HQ

D.C. Serves population of 1.8 millionS M t d

Prince George'sPrince George'sPrince George'sPrince George'sPrince George's Serves Montgomery and

Prince George's Counties Provides 170 MGD drinking water Collects 200 MGD wastewater Collects 200 MGD wastewater Treats 70 MGD wastewater Supplies DC Water with 130 MGD

wastewater

WSSC Sustainability GoalsWSSC Sustainability Goals Provide safe and reliable water to a growing

customer basecustomer base.

Maximize energy and residuals recovery from Wastewater Treatment Plants.

Minimize energy consumption and GHGMinimize energy consumption and GHG emissions.

Maximize utilization of renewable energy.Maximize utilization of renewable energy.

Be an asset to the community.

Renewable EnergyRenewable Energy -- SolarSolarRenewable Energy Renewable Energy SolarSolar

Purchase Power Agreement (PPA)

Source: Customer’s Guide to Solar Power Purchase Agreements, Rahus Institute, 2008

WSSC Solar Project ObjectivesWSSC Solar Project Objectives

Host Solar PV installation (max 2 MW per site). Off source: PPA Provider to design, build, own,

operate solar PV system; sells WSSC power. Reduce energy costs through the purchase of Reduce energy costs through the purchase of

solar energy at Seneca and Western Branch. Reduce Risk: PPA Provider will retain all rights Reduce Risk: PPA Provider will retain all rights

to SRECs for the life of the PPA. Reduce WSSC’s carbon footprint (Scope 2). p ( p )

WSSC will not be able to monetize any PV power production carbon offsets.A d b th it t t Award both sites as one contract.

Solar PV PPA Award CriteriaSolar PV PPA Award Criteria

Technical sufficiency Technical sufficiency. Reliability of proposed system and

componentscomponents. Bid Price ($/kWh); $.10/kWh or less. Project experience (prime & subs). Project team (personnel assigned to j (p g

project). Ability to finance at time of proposal Ability to finance at time of proposal.

Solar PPA RFPSolar PPA RFP-- IncludesIncludes

Hourly Data (2 years).y ( y ) Allowable solar site areas. Critical Area boundaries (Western Br.).Critical Area boundaries (Western Br.). Geotechnical reports. Topographic maps (Seneca) Topographic maps (Seneca) Interface with ENR contractor (Seneca). Electrical one-lines site plans MH and duct Electrical one-lines, site plans, MH, and duct

bank details. Electrical cable & conduit schedules Electrical cable & conduit schedules.

Solar PV PPA Procurement TimelineSolar PV PPA Procurement Timeline

– RFP Issue Date: 4/8/11Pre Proposal Conference/Site Visits: 4/27/11 4/28/11– Pre-Proposal Conference/Site Visits: 4/27/11, 4/28/11

– SLMBE Matchmaking Event: 5/12/11• SLMBE Site Visits: 5/12/11, 5/13/11

– RFP Questions Deadline: 5/16/11– Questions Answered/Last Addendum Issued: 5/20/11– Proposal Due: 6/8/11Proposal Due: 6/8/11– Proposal Evaluation Completed: 6/21/11– Firms Short listed & Interviews Completed: 7/5/11

C t t N ti ti C l t d 7/15/11– Contract Negotiation Completed: 7/15/11– WSSC Commission Approval: 9/21/11– Notice to Proceed: 10/19/11– Pre-Mobilization Meeting: 10/26/11

Solar PV PPA Implementation Solar PV PPA Implementation TimelineTimelineTimelineTimeline

– Design/Construction Initiation: 11/1/11– Seneca ENR duct bank ready for tie-in by y y

6/30/11.– Design/Construction Completion: 12/31/12

Seneca WWTP Seneca WWTP -- GermantownGermantown

Seneca WWTP Solar Ground AreaSeneca WWTP Solar Ground Area

Seneca OneSeneca One--Line DiagramLine Diagram

Western Branch WWTP Western Branch WWTP –– Upper MarlboroUpper MarlboroUpper MarlboroUpper Marlboro

Western Branch WWTP Western Branch WWTP -- Solar Ground AreaSolar Ground AreaSolar Ground AreaSolar Ground Area

Western Branch OneWestern Branch One--Line DiagramsLine Diagrams

Western Branch OneWestern Branch One--Line DiagramsLine Diagrams

Solar PV PPA Project Skills RequiredSolar PV PPA Project Skills Required

Project management Electrical/civil/structural design Permitting (MDE, DNR) Solar module/inverter/transformer equipment Construction Commissioning/startup Financing/REC trading Data performance monitoring Electronic billing

M i t / i Maintenance/repair

Questions/DiscussionQuestions/Discussion