Alerian Capital Management Announces Addition Of Valero GP Holdings, LLC (NYSE: VEH) To the Alerian MLP Index.

NEW YORK -- Alerian Capital Management LLC announced today that at the close of business on September 15, 2006, Valero GP Holdings, LLC (NYSE: VEH) will be added to the Alerian MLP Index.

Valero GP Holdings, LLC (NYSE: VEH) has a market capitalization of $850 million and owns general partner and limited partner interests, and the incentive distribution rights of Valero L.P. (NYSE: VLI), one of the nation's largest independent operators of petroleum product terminals and petroleum liquids pipelines. Valero L.P.'s refined product terminals, petroleum and specialty liquids storage and terminaling operations, and crude oil storage tank facilities are predominantly located on waterways that are easily accessible by barge or vessel. Altogether, these facilities have approximately 77 million barrels of storage capacity. In addition, Valero L.P.'s 9,243 miles of crude oil and refined products pipeline systems serve growing markets in the Mid-Continent, Southwest and Texas-Mexico border regions of the United States.

At the close of business on September 15, 2006, Valero GP Holdings, LLC (NYSE: VEH) will be added to the Alerian MLP Index and Rio Vista Energy Partners L.P. (NASDAQ: RVEP) will be removed.

In accordance with the existing index methodology, the index's 50 constituents will be rebalanced on a float-adjusted market capitalization-weighted basis.

Constituent additions to and deletions from the Alerian MLP Index will be announced in advance and do not reflect an opinion by Alerian Capital Management LLC on the investment merits of the respective securities.

About the Alerian MLP Index

The Alerian MLP Index is a composite of the 50 most prominent energy master limited partnerships and is calculated by Standard & Poor's using a float-adjusted market capitalization methodology, providing an unbiased, comprehensive benchmark for the performance of this emerging asset class. The index is disseminated real-time on a price return basis (NYSE: AMZ) and the corresponding total return index is disseminated daily through ticker AMZX. Relevant constituent data points such as market capitalization, daily dividends, and dividend yield are disseminated daily.

About Alerian Capital Management

Alerian is a registered investment advisor that manages portfolios exclusively focused on midstream energy Master Limited Partnerships. The company focuses on fundamental analysis in this emerging asset class, combining its bottoms-up private equity philosophy with risk management programs designed to preserve capital and mitigate portfolio volatility. Investing in both the private and public equity markets, the company concentrates on maximizing absolute total returns on a risk-adjusted basis. For more information, visit www.alerian.com.

About Valero GP Holdings, LLC

Valero GP Holdings, LLC owns the general partner of and a 21.4 percent limited partner interest in Valero L.P. A publicly traded limited partnership based in San Antonio, Texas. Valero L.P. operates independent terminals and petroleum liquids pipeline systems in the United States and also operates terminals in the Netherlands Antilles, Canada, Mexico, the Netherlands, and the United Kingdom. The partnership's assets include 9,243 miles of pipeline, 88 terminal facilities, and 60 crude oil storage tanks with an aggregate storage capacity of approximately 77 million barrels. For more information on Valero GP Holdings, LLC, please visit www.valerogpholdings.com. For more information on Valero L.P., please visit www.valerolp.com.

About the New York Stock Exchange 

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About Standard & Poor's

Standard & Poor's, a division of The McGraw-Hill Companies (NYSE:MHP), is the world's foremost provider of independent credit ratings, indices, risk evaluation, investment research and data. With approximately 6,300 employees located in 21 countries and markets, Standard & Poor's is an essential part of the world's financial infrastructure and has played a leading role for more than 140 years in providing investors with the independent benchmarks they need to feel more confident about their investment and financial decisions. For more information, visit http://www.standardandpoors.com.