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February 15, 1983 <br /> Project 116-1.4 <br /> 2 _ <br /> the required work with no progress. Due to continuing wet weather, <br /> we have commenced pumping all ponded water off the trench caps immed- <br /> iately following rain storms. We will continue to follow this pro- <br /> cedure until field conditions permit completion of the earthwork and <br /> grading necessary to achieve proper drainage. <br /> Drilling mud storage and removal adjacent to the evaporation pond <br /> system. <br /> In compliance with your previous order to remove drilling mud residue <br /> from Ponds #1, #2 and #3, followed by investigation of clay liner <br /> 'integrity, the mud waste was placed in storage in the Group 1 waste area. <br /> The storage area was surrounded by a perimeter drain ditch to intercept <br /> and divert surface run-off back into Pond #1. This system has been <br /> successful in containing surface water which has come into contact <br /> with stored drilling mud waste. Upon completion and approval of <br /> Trench #4, the mud waste will be moved to an acceptable portion of <br /> the trench for final disposal. <br /> Specifications, design details and soil test results on Group 1 <br /> Disposal Trench A. <br /> This information is contained in a later section of this letter report. <br /> - Clay liner addition in Evaporation Pond #5. <br /> In compliance with the directive from your Board, the additional <br /> liner material will be placed and compacted as soon as weather and <br /> fluid storage conditions permit. It was impossible to comply with <br /> the original schedule-of-compliance due to the additional work re- <br /> quired by your Board in the other ponds, in Trench #4, on general <br /> drainage improvements and because of early fall weather conditions. <br /> We will continue to coordinate this activity with our Area Engineer. <br /> New groundwater monitoring wells. <br /> In accordance with the revised Discharge Requirements and Monitoring <br /> Program adopted by your Board on 10, December, 1982, we have agreed <br /> with the schedule for constructing new wells. This agreement assumes <br /> field access conditions permit entrance of the required equipment. <br /> The new wells will be constructed using the specifications shown on <br /> Plate 3, Monitoring Well Detail. <br /> Group l Disposal Trench #4 <br /> During September and October, 1982, Group 1 Waste Disposal Trench #4 was <br /> excavated to the following dimensions: <br /> 700' long X 100' wide X 25' deep (max. ) <br /> 9Betac_4ssociates Q <br />