Sienna Resources Inc V.SIE

Drilling Z2

[infestor]

February 3, 2003 OTCBB: MSEV Z2 Well in Texas Reaches 1,525 feet Micron Enviro Systems ("MSEV") is extremely pleased to announce that drilling of the Z2 Well on the Green Ranch Prospect commenced drilling on February 1. Currently the well has been drilled down to 1,525 feet. The operator expects drilling on the Z2 to take approximately 10-14 days barring any unforeseen issues. The Z2 Well will have two primary targets that are intended to be tested. The Green Ranch Prospect is a proposed 15 well program consisting of 4,131 acres of leasehold on the Green Ranch in Stephens County, Texas. This leasehold is located approximately 50 miles northeast of Abilene, Texas and approximately 10 miles northwest of Breckenridge, Texas, along the North Stephens-Shackelford County line. The Green Ranch Prospect lies within an oil and gas producing province identified as Texas Railroad Commission District 7B, which encompasses 24 counties in North Central Texas. TRRC reports indicate District 7B has produced a total of 2.225 billion barrels of oil from 1935 through to June 2001. These reports also indicate the district has made 2.277 TCF of unassociated gas (gas wells) from 1970 through to June 2001. It is estimated that this district accumulated approximately 2.78 TCF of casinghead gas. During the year 2000, District 7B made 14.1 million barrels of oil, 18.6 BCF of casinghead gas and 45.3 BCF of unassociated gas. There has been over $1.9 million spent on the Green Ranch Prospect. By interpreting the seismic data, several "bright spots" have been identified within the Bend Conglomerate and other formations within the prospect and are being targeted for testing. In 1997, a well drilled on one of the "bright spots" in the Conglomerate blew out around the surface casing, flowing at rates of 10 to 15 million cubic feet per day. In other corporate news, meetings are scheduled for this week in regards to the 50 well oil prospect in Saskatchewan Canada. If you have any questions, please call MSEV at [phone]. If you would like to be added to MSEV's update email list, please send an email to [e-mail] requesting to be added. Bernie McDougall, President of MSEV states, "We are thrilled about the drilling of our second well of our proposed 15 well program in Texas. MSEV continues to develop its oil and gas prospects as well as build strategic relationships to enhance shareholder value. This is a tremendously exciting time for MSEV and its shareholders." MSEV is an emerging oil and gas company with the goal of becoming a mid-range oil and gas producer that focuses on the North American marketplace. This press release contains forward-looking statements that involve risks and uncertainties. The statements in this release are forward-looking statements that are made pursuant to the safe harbor provision of the Private Securities Litigation Reform Act of 1995. Actual results, events and performance could vary materially from those contemplated by these forward-looking statements. These statements involve known and unknown risks and uncertainties, which may cause the Company's actual results in future periods to differ materially from results expressed or implied by forward-looking statements. These risks and uncertainties include, among other things, volatility of oil and gas prices, product demand, market competition, and imprecision of reserve estimates, and actual ability to recovery oil and gas that is present or represented to the company by the operator. You should independently investigate and fully understand all risks before making investment decisions. Contact Information: Bernie McDougall Micron Enviro Systems, Inc. [e-mail] TEL: [phone] Fax: [phone] www.micronenviro.com