4 1 one61street-4.txt 161 - STATEMENT OF CHANGES UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 OMB APPROVAL ---------------------------- OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response.......0.5 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940 [X] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). (Print or Type Responses) -------------------------------------------------------------------------------- 1. Name and Address of Reporting Person* 161 Street and River, LLC -------------------------------------------------------------------------------- (Last) (First) (Middle) 8910 University Center Lane -------------------------------------------------------------------------------- (Street) San Diego CA 92122 -------------------------------------------------------------------------------- (City) (State) (Zip) -------------------------------------------------------------------------------- 2. Issuer Name and Ticker or Trading Symbol IWT Tesoro Corporation (f/k/a Ponca Acquisition Corporation - currently not trading -------------------------------------------------------------------------------- 3. I.R.S. Identification Number of Reporting Person, if an entity (Voluntary) -------------------------------------------------------------------------------- 4. Statement for Month/Day/Year 10/1/02 -------------------------------------------------------------------------------- 5. If Amendment, Date of Original (Month/Day/Year) -------------------------------------------------------------------------------- 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) [_] Director [_] 10% Owner [_] Officer (give title below) [X] Other (specify below) No Longer Subject to Reporting Requirements because now owns less than 10% -------------------------------------------------------------------------------- 7. Individual or Joint/Group Filing (Check Applicable Line) [X] Form filed by One Reporting Person [_] Form filed by More than One Reporting Person -------------------------------------------------------------------------------- ================================================================================ Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ================================================================================

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. * If the form is filed by more than one reporting person, see Instruction 4(b)(v). Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. (Over) SEC 1474 (9-02) FORM 4 (continued) Table II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) ================================================================================

Explanation of Responses: The filer now owns less than 10% of the outstanding common stock of the company. 161 Street and River, LLC, a Delaware limited liability company By: /s/ Guy J. Iannuzzi, Manager October 10, 2002 ----------------------------------------- ----------------------- Guy J. Iannuzzi, Manager ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number. Page 2

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