SITE INFORMATION AND CORRESPONDENCE

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CHRONOLOGY TULEBURG YACHT HARBOR 333 ' TULEBURG LEVEE STOCKTON CA 01/28/00 Subsurface investigation initiated this date. A total of 14 geoprobe direct push borings were advanced on site in the area of existing underground storage tanks (UST) and product piping lines. Work completed on 02102100. Soil and one grab groundwater samples were collected for analysis. 03/23/00 Subsurface Investigation Summary Report submitted this date. Analytical results reported 8.6 mg/kg TPH diesel, 1.4 mg/kg TPH gasoline and 0.016 mg/kg xylene in soil samples near the USTs, and 110 µg11 TPH diesel in the groundwater. 05/04/00 Underground storage tanks and piping lines were filled with four sack sand slurry. 05/18/00 Unauthorized Release Report#00-U10 and Prop 65#00-037 submitted this date. 06/30/00 Notice of Responsibility and Site Letter sent this date to Waterfront Yacht Harbor. 08/01/00 PHS/EHD directive sent to Waterfront Yacht Harbor requesting the submittal of a work plan to define the extent of the contamination. k 08/30/00 Phone conversation with site consultant; Waterfront Yacht Harbor questions the need for further investigation. 09/13/00 Conversation between PHS/EHD and CVRWQCB. Decision that further investigation is warranted. 10/26/00 Correspondence from consultant requesting reconsideration of the need for further investigation. Reference made to ongoing investigation of site located downgradient, groundwater data is available from their monitoring wells. 01/26/01 Correspondence from consultant requesting reconsideration of the need for further investigation. Referenced specific report and specific MW data collected in 1999. One monitoring well located on property south of the subject site had only 0.9 ppb toluene. 02/28/01 PHS/EHD and CVRWQCB reviewed referenced data. Decision that further work is not required. r