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Compañía de Minas Buenaventura S.A.A. press release

NOVA Chemicals Corporation Notice of First Quarter Earnings Release and Conference Call

NYSE - New York Stock Exchange · Peru

PITTSBURGH, April 17 /CNW/ - NOVA Chemicals Corporation (NYSE:NCX)(TSX:NCX):

Earnings Release: Wednesday, April 25, 2007 8:00 a.m. EDT

Conference Call: Wednesday, April 25, 2007 10:00 a.m. EDT

Dial-In Number: 416.406.6419

Live Web Cast: Option 1 - The web cast link will be available at www.novachemicals.com -- Investor Center -- IR Calendar -- 2007 First Quarter Earnings Release Conference Call

or Option 2 - The web cast can be accessed live at Vcall's www.investorcalendar.com (ticker symbol NCX).

Audio Replay: An audio replay of the conference call will be available at 416.695.5800 (passcode (number sign)3207766) through Wednesday, May 2, 2007.

Web Cast Replay: A web cast replay of the conference call will be archived at www.novachemicals.com -- Investor Center -- IR Calendar -- 2007

Upcoming Earnings Release Dates:

-- 2nd Quarter 2007 - Wed., July 25, 2007 -- 3rd Quarter 2007 - Wed., October 24, 2007

Please note that dates are subject to change. Conference calls and live internet web casts to discuss quarterly earnings will be held at 10:00 a.m. Eastern Time on the day of the earnings release. Earnings will be released at 8:00 a.m. on the day indicated. The news release will contain the necessary instructions for accessing the call.

NOVA Chemicals produces plastics and chemicals that are essential to everyday life. Our employees develop and manufacture materials for customers worldwide that produce consumer, industrial and packaging products. We work with a commitment to Responsible Care(R) to ensure effective health, safety, security and environmental stewardship. Company shares are traded on the Toronto and New York stock exchanges as NCX.

Visit NOVA Chemicals on the Internet at www.novachemicals.com.

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