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Mr. Harlin Knoll, REHS 3 December 13, 1991 <br /> Following receipt of the closure verification analyses, the excavations were backfilled and <br /> compacted. Imported clean fill was used to replace the stockpile material. Analysis of <br /> the two soil stockpile samples indicated the presence of TPH-G at concentrations of 0.77 <br /> and 33 ppm, toluene at 0.035 and 0.0057 ppm, and xylene in one sample at 0.013 ppm. <br /> Once the stockpile is completely characterized, it will most likely be transported to <br /> Forward Landfill for disposal. <br /> The analytical results of the closure verification samples indicate that there remains no <br /> threat to ground water quality and additional excavation is not warranted. Canonie <br /> considers closure complete. <br /> If you have any questions concerning this Closure Excavation and Sampling Report, <br /> please contact me or David Poole at (510) 463-9117. <br /> Respectfully submitted, <br /> (why -- <br /> David L. Collett, P.E. <br /> Senior Project Engineer <br /> DLC/pm <br /> Attachments <br /> cc: Anne Duarte, Time Oil Co. <br /> — <br /> CanoweEnvironmental <br />