EX-99.1 5 v83748exv99w1.txt EXHIBIT 99.1 EXHIBIT 99.1 FORM OF SECTION 906 CERTIFICATION CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 In connection with the accompanying Form 10-Q of N2H2, Inc. for the quarterly period ended June 30, 2002, I, Howard P. Welt, President & Chief Executive Officer of N2H2, Inc., hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) such Form 10-Q for the quarterly period ended June 30, 2002 fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) the information contained in such Form 10-Q for the quarterly period ended June 30, 2002 fairly presents, in all material respects, the financial condition and results of operations of N2H2, Inc. 8/13/02 /s/ Howard P. Welt ----------------------- ---------------------------------- Date Howard P. Welt President & CEO