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28 August 2003 <br />AGE -NC Project No. 03-1063 <br />Page 5 of 7 <br />On 29 July 2003, approximately 90 tons of excavated soil was transported from the site and disposed <br />at Allied Waste/Forward Landfill. The manifests with weight master certificates are attached in <br />Appendix B. <br />3.5. MONITORING WELL ABANDONMENT <br />The three two-inch diameter ground water monitoring wells (MW -1 through MW -3) were abandoned <br />under SJCEHD permit on 25 July 2003. A copy of the permit is included as Appendix C. <br />Each well cover box was removed and the well was over-drilled to a depth of approximately 3 feet <br />bsg utilizing a truck -mounted drill rig equipped with 12 -inch diameter hollow stem augers. Each well <br />was then pressure -grouted; pressure (15-20 psi) was be applied to each well for approximately three <br />minutes to ensure grout penetration into the filter pack. The top three feet will then be backfilled <br />with neat cement. <br />The grout mixture for all wells consisted of Type I/H portland neat cement and not more than <br />6 gallons of water per 94 -pound sack of cement. <br />4.0. FINDINGS <br />Soil description was determined from field data collected on 25 July 2003. The impact of the <br />unauthorized petroleum hydrocarbon release on soil was quantified by laboratory analysis of soil <br />samples collected on 25 July 2003. The volume ofpetroleum hydrocarbons removed was calculated <br />from field data. <br />4.1. STRATIGRAPHY <br />Sand with a light -brown to medium brown color was encountered in the excavated area from surface <br />grade to the floor of the excavation. A petroleum hydrocarbon -like odor was, noted in soil samples <br />collected from the northern and southern sidewalls. <br />4.2. ANALYTICAL RESULTS FOR SOIL SAMPLES <br />A total of six discrete soil samples from the excavation were analyzed for TPH-hf and MTBE/BTEX <br />compounds by EPA Methods 8015 Modified and 8021, respectively. <br />Advanced GeoEnvironmental, Inc. <br />