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Himanshu Mehta, P . E . GeOSynte& 7 May 2008 consultants Page 9 site) . This environmental database review may cause us to pursue acquisition of additional information from involved environmental agencies . For example, the database search may reveal the presence of an environmental contamination issue that could potentially affect the site. In this case, we may contact the involved environmental agency by telephone to learn more about the potential contamination problem, including the nature of the contamination and potential for it to migrate toward the subject site. Database review findings which may lead us to contact environmental agencies include : a known environmental contamination problem in the area, the presence of nearby storage tanks, the presence of nearby industrial operations , the presence of nearby large quantity generators, etc . Besides contacting involved environmental agencies, Geosyntec may also attempt to contact entities such as the local fire department, hazardous materials emergency response department, fire marshal , etc . , to learn information about reports of environmental issues in the vicinity of the site . We may find through our database reviews and telephone contacts that it would be useful to review specific files housed at environmental agency offices . This work would be performed after consultation and approval by you; file review work is not included in the associated Phase I ESA cost estimate. Note that the Phase I ESA work produced under this work scope will exclude the effort of searching for and reviewing environmental liens since this is not an in-scope item for Phase I ESA work per the ASTM E 1527-05 Standard. Phase I ESA Task Ce Historical Site Usage Geosyntec will endeavor to obtain information on historical usage of the site to evaluate the potential for historical land use to have resulted in potential environmental concerns for the site. It should be noted that ASTM E1527 -05 requires review of historical sources as far back in the history of the property as it can be shown that the property was developed (including for agricultural uses , sites with structures , etc . ) . However, we cannot guarantee that the efforts we undertake as scoped herein will provide coverage to the first development of the site, and hence, a data gap may result . Our primary methods for obtaining historical land usage information include review of historical aerial photographs , Sanborn fire insurance rate maps or city directories if Sanborn° maps are not available, review of a recent USGS 7 . 5 -minute topographic map, review of historical site- XR08051 R/CCR08045R. DOC engineers I scientists I innovators