RIVERSIDE COUNTY: LANDFILL GAS-TO-ELECTRICITY
The Waste Management Department in Riverside County, California (RCWMD) is developing up to six landfill gas-to-electricity projects on six different County-owned landfills. Although the usual method of controlling landfill gas emissions is collecting and burning the gas in flares, utilizing the gas instead to generate electricity yields both economic returns and environmental benefits. Due to recent utility industry restructuring and the resulting new renewable energy programs on the state level, LFG-to-electricity power plants in California are more economically feasible now than ever before. This paper describes the process the RCWMD is using to implement the projects and capture revenues. As electric utility restructuring continues to sweep the nation and similar renewables programs are established in other states, the lessons learned from these projects may be transferred to LFG-to-electricity projects throughout the country.
Utility Restructuring in California
Prior to restructuring, customers in California received power from a mixture of generation sources. Approximately 11 percent of the power consumed in the state was supplied by renewable energy sources, such as small hydropower, solar, wind, and biomass. However, this renewable energy was mixed with the rest of the generation portfolio in the state, which includes coal and natural gas generation technologies. Barring installing their own generation facilities, such as solar panels, consumers had no choice but to accept the average generation mix for the state. With the onset of the new market structure, however, energy service providers are introducing new energy products, such as renewable power, to attract customers and capture market share. This renewable, or "green" power is usually sold at a premium above the market price for "brown" power. For generators of green power, which is traditionally more expensive to produce, this presents a new market opportunity to develop economically viable renewable energy projects.
While AB 1890 opened up various aspects of the market to competition, the state also made provisions to continue public support for energy efficiency, low-income assistance, public interest research and development, and renewable energy programs through at least March 2002. The California Energy Commission (CEC) was charged with the responsibility to distribute the $540 million of public funds allocated to supporting the continued production and use of electricity from renewable resources in the state. Thirty percent of the $540 million, or approximately $162 million, was distributed to new renewable electricity generation projects through a competitive process. Again, for developers of new renewable energy power plants, this represents a new opportunity to create a viable project.
Renewable Power Sales
There are two options for a power sales arrangement. In one option, the County agrees to purchase power to supply County facilities from one of these companies. In return, the company agrees to purchase renewable power from the RCWMD projects at a premium price that makes the projects viable.
The other option is for the RCWMD to sell the power to one of the companies at a fixed price, a price that fluctuates with the market, or a combination of the two. The RCWMD may also start out with a fixed price contract and renegotiate later for a floating price contract, or vice versa. A renewable power premium may or may not be included.
CEC Renewable Energy Incentives
In order to receive the payments, the RCWMD must complete certain milestones, begin operating its renewable power plants, and submit monthly invoices to the CEC documenting the sale of its generated power. One milestone is preparing a Project Award Package (PAP), which includes a detailed description of the project site, required permits, financial information, schedules, and a formal funding award agreement signed by the County and a CEC representative. Other milestones involve obtaining all required project permits and meeting various construction schedules.
Status: In March 1999, the RCWMD submitted the PAPs for the six projects. The CEC approved and adopted them shortly thereafter. In June 1999, the RCWMD completed the second milestone, which was filing all necessary environmental permits.
Section 29 Production Tax Credits
Because the County is not a taxpayer, it must enter into a transaction with a private investor in order for the eligible power projects to benefit from PTCs. The investor would purchase rights to the LFG and an ownership interest in the gas production facilities, and would then sell the collected gas to the County or its power generating agent and collect PTCs on the sale of the gas. The investor yields a percentage of the value of the PTCs to the County through a series of transactions, including the purchase of the gas production rights and purchase/lease of gas production facilities from the County. Some share of the value of the PTCs may also flow to the County if it operates and maintains the gas production facilities on behalf of the investor. Essentially, the yield to the County is the purchase price for gas production rights and facilities, plus operation and maintenance payments, minus the gas purchase payments made by the County. The funds are normally paid to the landfill owners (the County) over time as the credits are generated.
To explore the market for potential investors for the three projects that qualify for the tax credits, the County issued an RFP in February 1999 and received proposals from two companies in March 1999. Because negotiations are ongoing with the potential investors, specific responses cannot be released at the time of this writing. However, the net present value of the PTCs to the County is expected to be in the range of $1.5 to $2.0 million.
Status: In August 1999, the County conducted in-depth meetings with both proposers regarding their proposals. The County anticipates that it will select a finalist and begin the transactions near the end of 1999.
Renewable Energy Production Incentives
Insufficient funds could result in some qualified projects receiving either no incentive payment or a prorated one. In the case where the appropriated funds are less than the amount required to make full payments to all qualified applicants, the funding is distributed according to tiers of renewable technologies. Payments are first provided to owners and operators of solar, wind, geothermal, and closed-loop biomass projects. The second tier includes all other qualified facilities, such as LFG-to-electricity projects. Because this revenue is uncertain, the County's feasibility analysis did not include reliance on this source.
Status: In order to begin the process, the County would submit a pre-application to DOE and obtain preliminary approval to receive REPIs for its projects.
Design, Construction, and Operation of the Plants
Status: Proposals are due in early September 1999, and the RCWMD anticipates bringing a final contract to its Board in November 1999.
Copyright © 2000 by Brown, Vence and Associates, Inc. All rights reserved.