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2.2.3 If some time has elapsed since the occurrence of the odor, ' the complaint must still be investigated. The investigation should include interviewing the complainant, completing the form in Appendix B, and visit the site where the complainant states that the odor was detected. The visit to the site of the alleged odor should be made at a time of day and during prevailing wind conditions that are similar to those occurring during the time the complainant states the odor was detected. 2.2.4 All complaints from the public, whether verbal or written, must be reported immediately to the Area President, Regional Vice President, and Vice President of Environmental Engineering and Compliance. 3.0 IDENTIFYING THE SOURCE OF ODOR 3.1 Once the presence of odor is identified through either self-inspection or through an odor complaint, the source of the odor needs to be identified. The source of the odor must first be identified before it can be mitigated. Typically, the source of the odor is readily identifiable. However, if the source of the odor is not obvious and cannot be traced immediately to a feature or activity at the facility, the following steps provide a methodology for identifying the source of the odor: 3.1.1 Using data from the weather station, determine the wind direction at the time the odor was identified. 3.1.2 Using an aerial photograph or plan of the facility, draw a 1 vector in the same direction as the wind, and intersecting the location where the odor was identified. 3.1.3 If the vector crosses the facility and the facility is in an upwind position compared to the location where the odor was identified, then determine the facility features and activities that lie along the vector. 3.1.4 Compare the identified odor to any odors generated along , the wind vector in an upwind position and determine the source of the odor. 3.1.5 Repeat this process at varying times of the day, under varying operational conditions, and with varying wind directions until the source of the odor is identified.