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Of <br /> Ms. Leah Goldberg - 2 - <br /> 4. <br /> 2 -4. During a 30 April 1998 telephone conversation with Mr. Vogt, I agreed that a soil remediation <br /> test using poplar trees could be performed at the Koppel site. The plan, included in the May <br /> well installation work plan, to collect samples for baseline soil and groundwater conditions <br /> within the grove of poplar trees is hereby approved. However, as I stated during a 10 June <br /> telephone call to Mr. Vogt, analysis of soil for TKN and pH must also be performed. During <br /> a telephone conversation on 10 June, Mr. Mike Infuma of San Joaquin County concurred <br /> with me regarding the installation of the replacement well for KP-1 and the three piezometers <br /> in the grove of poplars. That work plan, the proposed semi-annual water sampling and annual <br /> soil sampling after the Spring 1999 sampling events, and the abandonment of certain <br /> piezometers and damaged well KP-1 are hereby approved. <br /> During a 27 May 1998 telephone conversation, Mr. Vogt told me the 12 May schedule of activities <br /> has changed due to unforeseen weather conditions. According to Mr. Vogt, the report of GeoProbe <br /> work and work plan for additional well installation will be submitted by 24 June 1998. This <br /> submittal should include a revised schedule of activities for the site. Mr. Vogt stated that results <br /> of the carbon enhanced bioremediation pilot test will be submitted by 5 July 1998. In the <br /> quarterly monitoring report due by 30 July 1998, please include the results of installation of the <br /> replacement well for KP-1 and the piezometers and the results of the initial groundwater samples <br /> from these installations. <br /> If you have any questions, I can be reached at(916) 255-3082. <br /> �W�Y <br /> DAVID F. STAVAREK <br /> Engineering Geologist <br /> DFS:dfs/Isb <br /> cc: Mr. Mike Infurna, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Daniel Munzer,Munco, Inc., Long Beach <br /> Ms. Karen Baril, Cargill, Inc., Minneapolis, Minnesota <br /> Ms. Miriam Barbonio, Chevron Chemical Company, San Ramon <br /> Mr. Sheldon Nelson, Chevron Research and Technology, Richmond <br /> Dr. Kirk O'Reilly, Chevron Research and Technology, Richmond <br /> Mr. Brian Roberts, Chevron Corporation, San Francisco <br /> Mr. Steve Larson, Cargill, Minneapolis, Minnesota <br /> Mr. Anthony Ciasulli, Morgan, Lewis & Bockis, Los Angeles <br /> Mr. George Koppel, Koppel Stockton Terminal, Lakewood <br /> Mr. Gerald Vogt, CH2M Hill, Sacramento <br />