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Himanshu Mehta, P.E. 7 May 2008 Page 10 Geosyntec consultants specific records provided by you and/or a site contact, review information obtained during the Task D, Geosyntec's site reconnaissance, and interview with an individual considered knowledgeable about historical practices at the site. As indicated above, Geosyntec commonly relies in part on review of historical aerial photographs to evaluate historical land use. We will attempt to obtain historical aerial photographs for the site from IRC back to the time of initial development of the site. Our effort to achieve this will include contact with a source for aerial photographs (provided by IRC) wherein we request from them aerial photographs which they have on file for public access on a frequency of every five years back to the first developed use or back to at least 1940 (we assume for budgeting that the first developed use began after 1940). This aerial photograph review also attempts to identify potential adverse environmental impacts visible in the aerial photographs for the site. Further, our review looks at adjacent properties to evaluate if adjacent land use may have the potential for environmental impact to the site. Copies of aerial photographs may or may not be incorporated into the report, at the discretion of Geosyntec. We also have included budget to conduct a search of Sanborn ° fire insurance rate maps, which provide a graphical depiction of known land uses in an area. If Sanborn ° coverage is not available for a particular site, Geosyntec will conduct a search of city directories for the site address. City directories compile historic address -related information into a single source and can be useful source of historic land use information, if available. Examples of other sources of historical land use information include review of a chain of title, recorded land deeds, tax maps, building permit drawings, business directories, land use records, tax assessors' records, community right -to -know records, flood plain classification maps, and wetland designation maps. We may attempt to pursue acquisition and review of these other information sources as deemed appropriate by Geosyntec. However, the cost to perform this additional work cannot be determined at this time and is not included in this proposal. Geosyntec will only review information which is publicly available, practically reviewable, and can be obtained from a source within a reasonable time and economical fashion given the enclosed scope, budget and schedule constraints of this project. Phase I ESA Task D: Site Reconnaissance and Onsite Interviews Geosyntec assumes it can perform a visit of the site within one person -day or less to evaluate present conditions with an emphasis on identifying potential environmental contamination XR08051 R/CCR08045 R. DOC engineers I scientists I innovators