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13 January 2015 <br />AGE Project No. 15-3595 <br />Page 4 of 4 <br />soil or water waste generated during field activities will be containerized in properly <br />labeled DOT -approved 55 -gallon drums, and stored on-site in an area lacking public <br />access. Disposal alternatives will be evaluated based on results of soil analysis. <br />BORING ABANDONMENT <br />All soil borings will be permanently sealed to prevent vertical migration of potential <br />contaminants. Soil borings shall be abandoned by backfilling with cement grout from the <br />total depth to surface grade. Borings advanced below the groundwater table will be <br />abandoned with grout utilizing tremie procedures. The top three to six inches of the <br />boring abandonments will be completed flush to surface grade with native soils or <br />concrete. The SCEHD will be notified for grout inspection at least 72 hours prior to <br />conducting grouting procedures. <br />If you have any questions or require further information, please contact our office at <br />(800)511-9300. <br />Sincerely, <br />Advanced GeoEnvi <br />- All A. 11 1 Na. 8574 <br />Brian W. Millman <br />Senior Project Geologi <br />California Professional <br />Advanced GeoEnvironmen[al, Inc. <br />