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03-01-2000 04:26PM FROM SEMCO TO r.u» <br />v .aw <br />The Plasteel Double Walled jacketed Type II tank was originally provided to H.J. Heinz <br />by Perkins Welding and installed by Balch Petroleum in 1994. The sole use of the tank <br />was to store 100% pure alcohol used for food processing. The tank was manufactured by <br />plasteel, Inc of Escondido, California, including factory installation ofPlasite 9060 fining <br />material which is compatible with alcohol as well as the proposed storage of diesel fuel <br />subsequent to re -certification. Please find attached copies of the tank <br />description/quotation and interior lining data. <br />We would propose the tank be inspected prior to removal and certified clean with no <br />remitting product or vapor present. Due to the nature of alcohol with 100% evaporation <br />we would hope the tank could be deemed "clean" and be made available to the owner to <br />dispose of without any stigma of its prior use If required, the tank could be inspected by <br />a Certified Industrial Hygienist or Registered Marine Chemist to assure the condition of <br />the tank. <br />The site has ground water at approximately 10 feet below grade. In order to maintain <br />control of the removal of the tank we propose the installation of clean ballast water (post <br />certification) to insure its stability. The alternative would be to install a pump at the edge <br />of the excavation to dewater during removal and backfilling. There is an access well at the <br />edge of the tank. The water in the tank excavation could be sampled under your direction <br />by a third party state certified lab prior to excavation to prequafify it for pumping. Your <br />direction regarding dewatering will be appreciated. <br />The site is being re -developed into a business park. The current location of the tank is in <br />an area dedicated for a proposed storm water drainage pond. The tank was installed with <br />pea -gravel backfill in 1994. Our scope of work includes placing the existing pea gravel <br />back into the excavation post-removal along with the clean overburden soil and Class II <br />aggregate base rock after review of soil analysis and approval by your Department. Final <br />constnrcdon/development of the retention pond will be subject to the approval of plans <br />and specifications provided by others- <br />