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Jeanine Jones 2 May 27, 1986 <br /> the north yard. Care must be taken to keep this <br /> drainage system operating to prevent run-off from <br /> leaving the Marley property. The integrity of the <br /> asphalt must be maintained at all times to prevent <br /> contaminated runoff from percolating into the ground. <br /> In addition, a berm surrounding the whole site should <br /> be installed before the next rainy season to prevent <br /> run-off from leaving the Marley property. <br /> o Further groundwater investigation must determine the <br /> total extent of contamination and vertical and <br /> horizontal migration rates. Copies of actual data to <br /> support these conclusions must be submitted with the <br /> final report. Likewise, the actual well logs must be <br /> submitted for the drilling performed by Hargis and <br /> Associates for the groundwater investigation. The logs <br /> submitted previously contained only a summary of <br /> borehole lithology. <br /> 0 Further soil investigation must determine the impact of <br /> soil contamination on the groundwater. <br /> 0 In prior sample analyses the levels of detection for <br /> chromium and chromium VI have been set too high. <br /> Limits of detection lower than 0. 1 mg/l for chromium <br /> and 0. 05 mg/l for hexavalent chromium are possible. <br /> See Canonie Laboratories letter dated August 12, 1985, <br /> sample 503938, piezometer 222 result. <br /> MAR:jka <br />