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SIEGFRIED G, Inc. <br /> Civil Engineering ■ Land Surveying ■ Structural Engineering ■ Planning <br /> February 28, 1995 <br /> Robert W.Siegfried <br /> Founder <br /> James F.Yost ' <br /> Wayne M.West <br /> Dana Corporation Robert G.Cetus <br /> 1550 Industrial Drive Lex A.Corrales <br /> Stockton, CA 95206 Lynn M.Sutton <br /> Stephen R.Thumlert <br /> Alan E.Linde <br /> Attn: Mr. Ed Eckenroth <br /> Gentlemen: <br /> Subject: Hazardous Waste Containment <br /> Several months ago you requested Siegfried Engineering,Inc.to provide a study of requirements <br /> for secondary containment in the event of tank rupture in the "E-Coat" area of the Dana <br /> Corporation frame assembly plant in Stockton. This procedure is a result of requirements from <br /> the State of California Code of Regulations for Environmental Health Standards. At the time of <br /> your instruction to us, it was also our understanding that the suppliers of primary containment <br /> storage tanks would be required to produce verification that their tanks would also be able to <br /> withstand certain applied forces without rupturing. <br /> Following your instructions and our review of the State regulations, we addressed two primary <br /> areas of concern. <br /> 1. Adequate containment for a possible rupture of the largest tank with designated hazardous <br /> materials. <br /> i. <br /> 2. Assurance that containment area will not permit seepage that could possibly contaminate <br /> native soils. <br /> i <br /> In addition to our review and interpretation of the State requirements, and additional <br /> conversations with Mr. Ed Eckenroth, we also visited the site to review the tank farm and its <br /> positioning in the "E-Coat" area. We also reviewed the construction drawings to determine <br /> capability of the existing floor construction to contain possible future spills of liquid materials. <br /> Further, we consulted with the fire sprinkling design engineer to determine the rate of <br /> sprinkler/fire flow in the "E-Coat" area should they be activated by a fire signal. <br /> The existing floor in the "E-Coat" area is constructed with slopes and depressed areas and ` <br /> includes a pump sump pit. Our analysis revealed that the liquid storage capacity of this "E-Coat" <br /> area is approximately 45,000 gallons. The combination of a rupture of the largest hazardous <br /> waste materials storage tank(2000 gallons)and sprinkler fire flow for a period of 20 minutes has <br /> a total accumulation of approximately 28,500 gallons, well below the calculated capacity. <br /> (Cont'd) <br /> 4045 Coronado Ave. ■ Stockton, CA 95204-2396 ■ 209 943-2021 ■ FAX 209 942-0214 <br /> PVLA%=1LT.WMW <br /> f,. <br />