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Mr Daniel K Barber <br /> D K Barber& Associates <br /> April 30, 2001 <br /> Page 4 of 4 <br /> ' BOREHOLE ABANDONMENT <br /> Upon completion of the sampling, the boreholes were backfilled to ground surface with a <br /> 1 slurry of neat Portland cement and potable water <br /> DECONTAMINATION PROCEDURES <br /> ' All downhole drilling and sampling equipment that was used during the SES-supervised <br /> field work was decontaminated before and after each borehole All surfaces of drilling <br /> ' equipment and materials were washed with water and Alconox detergent, and scrubbed <br /> until all visible dirt, grime, grease, rust flakes, etc , had been rinsed from the equipment <br /> ' We appreciate the opportunity to provide you with the requested technical services <br /> Please call us directly at (510) 644-3123 if you have any questions <br /> ' Sincerely, <br /> Stellar Environmental Solutions <br /> ' Richard S Makdisi, R , R E A, <br /> Principal Y -- — <br /> Attachments <br /> Stellar Environmental Solutions <br />