News Release

FOR IMMEDIATE RELEASE: October 30, 2002

CONTACT: John T. Day, President/CEO

Dennis P. Gauger, CFO

Nevada Chemicals, Inc.

801-984-0228

Nevada Chemicals, Inc. Announces Third Quarter 2002 Earnings

SALT LAKE CITY: UTAH - John T. Day, President and Chief Executive Officer of Nevada Chemicals, Inc. (NASDAQ/NMS:NCEM), formerly known as Mining Services International Corporation (MSIX), today announced earnings for the third quarter ended September 30, 2002. The company had net income from continuing operations of $644,000 or $0.09 per share compared to $292,000 or $0.04 per share in the third quarter of 2001. For the nine months ended on September 30, 2002, the company had net income from continuing operations of $1,528,000 or $0.21 per share compared to $577,000 or $0.08 per share for the nine months ended September 30, 2001.

In announcing the results for the third quarter, John Day commented: “We are encouraged with the continued strong earnings for NCI. The resulting net income per share of $0.09 for the quarter is well in line with the guidance given for the last half of this year. Last quarter in our conference call, we provided our estimate of $0.10 to $0.14 per share as the combined earnings for the 3^rd and 4^th quarters of 2002 for NCI.”

NCI has a strong balance sheet, with an excess of $1 per share of cash or short term investments on hand. NCI has no debt other than current accounts payable and accrued expenses and the board is reviewing options for the future. The book value per share of NCI continues to grow and has now reached a value of $3.08.

The business activities of NCI include a 50% ownership in Cyanco, a non-corporate joint venture engaged in the manufacture and sale of liquid sodium cyanide primarily in Nevada, and the rental of an office building in Sandy, Utah.

In late November 2001, the Board of Directors authorized a buy back program for up to 500,000 shares of the company’s common stock. NCI has repurchased a total of approximately 147,000 shares of its common stock. The purchases have averaged less than the book value per common share of the company. The Board of Directors of NCI continues to endorse the stock buy back program.

NCI will host a conference call to discuss the third quarter results November 5, 2002 at 11:15 a.m. ET, 9:15 a.m. MT. Media representatives, analysts and the public are invited to listen to this discussion by calling 800-937-6563 (international callers: 801-983-4013), access reference: Nevada Chemicals, 3rd Quarter Financial Report. A replay of the call will be available beginning one hour after the conclusion of the call and will run through Tuesday, November 12, by dialing 1-800-839-0860 (international callers: 402-220-1490) and entering the passcode 1017.

NEVADA CHEMICALS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS SUMMARY

The sale of the Company’s explosive business in November 2001 is accounted for as a discontinued operation, and accordingly, amounts in the above table for 2001 have been restated to reflect discontinued operations accounting.

Note: The foregoing contains “forward-looking” statements that are pursuant to the safe harbor provisions of the Private Securities Reform Act of 1995. Investors or readers are cautioned that forward-looking statements involve risks and uncertainties that may affect the Company’s business prospects and performance. These include, but are not limited to, continued demand for sodium cyanide in the gold mining industry of Nevada, economic, competitive, governmental, technological and other factors discussed in the Company’s reports to shareholders and periodic filings with the Securities and Exchange Commission.