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540 West Scotts Avenue*ell Destruction • August 4, 1998 <br /> Proiect 9644 Page 2 <br /> 2. A 10 inch hollow stem auger will be used to drill around the PVC <br /> casing and well screen in each well to remove the cement and <br /> bentonite sanitary seal, and the sand filter pack. Each of the <br /> locations will be drilled to at least 40 feet. The drill cuttings will be <br /> observed to determine that the drilling extends beyond any filter <br /> pack. <br /> 3. The PVC well will then pulled out of the inside of the hollow <br /> stem auger. <br /> 4. Neat cement grout (five sacks of cement to approximately 20 <br /> gallons of water) will then be pumped or tremied into each well. <br /> The grout will be placed from the bottom of the well to the top in <br /> order to prevent any mixing of the grout with the groundwater. <br /> 5. The tremie pipe or pump hose will be removed and the well <br /> cavity topped off with additional grout. <br /> 6. The soil, casing and vault will then be disposed of as construction <br /> debris. <br /> Appropriate permits will obtained to carry out the described well abandonment. <br /> If there is any additional material or data needed or if there are any questions, <br /> please contact us so that we may respond in a timely manner. Thank you for <br /> your consideration in this <br /> OQROFESSli <br /> CARS <br /> Sincerely, y ; <br /> LU772 <br /> N0. 23 <br /> yt <br /> Joh Carver CIVIL <br /> Civi Engi r 2377 (Ex 31,E ON <br /> F DDB ase <br /> Dubovsky, President N0.REA- 540 <br /> R A No. 2540 (Expires June 30, 1999) * Expires 6/30/98 <br /> v9 �,i1P <br /> WILLIAM DUBOVSKY ENVIRONMENTAL <br />