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~ time this report was prepared (i.e., federal, state, and local laws, rules, regulations, market conditions, economic conditions, political climate, and other applicable matters). All findings, conclusions, and recommendations stated in this report are based on the data and information provided, and observations and conditions that existed on the date and time of the property visit. Responses received from local, state, or federal agencies or other secondary sources of information after the issuance of this report may change certain facts, findings, conclusions, or circumstances to the report. A change in any fact, circumstance, or industry-accepted procedure upon which this report was based may adversely affect the findings, conclusions, and recommendations expressed in this report. 1.4 Data Gap and Data Failure According to ASTM E1527-05, data gaps occur when the Environmental Professional is unable to obtain information required, despite good faith efforts to gather such information. Data failure is one type of data gap. According to ASTM E1527-05 "data failure occurs when all of the standard historical sources that are reasonably ascertainable and likely to be useful have been reviewed and yet the objectives have not been met". Pursuant to ASTM Standards, historical sources are required to document property use back to the property's first developed use or back to 1940, whichever is earlier. The following data gaps were identified during the course of this investigation: • No access was provided to the portion of Unit 3 occupied by Ghent Electric. However, the key site manager, Mr. Tony Azevedo, reported that the property use is not industrial, and no hazardous materials or petroleum products are used in operations. Based on this information, this limitation is not expected to significantly alter the findings of this investigation. • The earliest historical resource obtained during this investigation was an aerial photograph from 1957. The lack of historical sources for the subject property between 1940 and 1957 represents historical data source failure. However, in the 1957 aerial photograph, the subject property and surrounding area appear as agricultural land. Thus, it is assumed that prior to 1957 the subject property would have been used for agricultural purposes, if not undeveloped. Based on this notion, this limitation is not expected to significantly alter the findings of this investigation. • No information was provided to AEI regarding previous owners or occupants. Consequently, interviews with past owners and occupants regarding historical onsite operations were not reasonably ascertainable and therefore, this constitutes a data gap. However, based on information obtained from other sources, including a review of agency files, aerial photographs and historical city directories, this data gap is not expected to significantly alter the overall findings of this investigation. Phase I Environmental Site Assessment AM Project No.274968 October 11,2007 Page 3