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Letter dated February 1, 2000 from John Strunk, Associated Earth Sciences, Inc. (AESI Project No. BV97016D) to Roger Nye, Washington Department of Ecology Northwest Regional Office, submitting first and second quarter ground water level measurements from the C1 (Qva) aquifer monitoring well network at Seattle-Tacoma International Airport. Reports on six pressure transducers installed in the Aircraft Operations and Maintenance Area (AOMA) collecting data every six hours since September 29, 1999. Conforms with Agreed Order #97TC-N122, Section IV, Item 2. Includes data tables with well IDs, reference elevations, SWL depths, and SWL elevations for wells measured September 23, 1999 and December 21, 1999. Third and fourth measurement events scheduled for March 22, 2000 and June 21, 2000. Copies to Paul Agid (Port Of Seattle), Mike Riley (S.S. Papadopulos & Associates), Mike Staton (Maul Foster & Alongi). Enclosures include ground water flow direction maps and transducer plots.