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• 5. SECONDARY CONTAINMENT <br /> All tanks, both product and waste, were stored within secondary containment. <br /> Compatible materials were stored together and physically separated by concrete <br /> berms. The concrete vault (which contained product and waste water tanks) and <br /> one of the concrete berms (which contained product tanks) were lined with <br /> double-wall plastic liner. We assume that the liner in the vault has maintained <br /> its integrity since there has been no apparent seepage of groundwater into the <br /> vault. <br /> 6. UNDERGROUND STORAGE TANKS <br /> There are no underground storage tanks at the site. <br /> E. SPILL, LEAK, AND ACCIDENT HISTORY <br /> There is no record of any spills or leaks at the facility. <br /> F. PREVIOUS SUBSURFACE WORK <br /> There is no record of previous subsurface work at the facility. <br /> II. SITE DESCRIPTION <br /> • This section presents a brief description of businesses in the immediate vicinity of the site; the <br /> hydrogeological setting; and a vicinity and site map <br /> A. VICINITY DESCRIPTION AND HYDROGEOLOGIC SETTING <br /> 1. VICINITY DESCRIPTION <br /> The site is situated in the industrial section of Manteca. It is in a mixed industrial <br /> area of manufacturing plants, warehouses, and offices. <br /> 2. SOIL TYPES, HYDROGEOLOGIC SETTING, AND DEPTH TO <br /> GROUNDWATER <br /> The characteristics of the soil and groundwater underlying the site have never <br /> been studied. information regarding the hydrogeologic characteristics of the site <br /> will be obtained as a result of the bore hole drilling outlined in this workplan. <br /> A City well in the vicinity indicates that groundwater is at about 30 feet. <br /> B. VICINITY MAP <br /> The Vicinity Map (Appendix A, Map 2)shows facilities in close proximity to the site and <br /> adjacent streets. <br /> • <br /> 3 <br /> ERICKSON, Inc. <br /> Specialized Service to Industry Since 1942 <br />