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for a seven day period of February 15 through February 21, 1994 shows a total of 17 management trips and 94 customer trips for the entire 7 day period (which included some very nice weather). This is an average of 16 trips per day, with an average visit duration of 12.3 minutes per visit. Essentially all trips are by auto. The proposed expansion would increase the visits to approximately 25 trips per day over the next three years. The estimated aggregate vehicle traffic count for the streets served by the storm sewer system is 2,500 per day. If vehicular pollution is directly related to auto trip numbers, the auto trips attributable to the facility expansion would represent : 9 / 2,500 = .0036, or about one-third of one percent. Such an increase is insignificant. If airborne pollution is related to paved area, the impact would be approximately 4%. Given the minor amount of particle air pollution, this impact is also immaterial. In view of the foregoing, approval of the proposed business expansion would not adversely impact the Critical Rivers District. Applicant specifically requests that a copy of this letter be included in any submission to the Enviromental Quality Board seeking review and comment from that Board. Sincerely, William C. Dubats Enclosures: Computer printouts of self-storage gate activity, February 15 -21, 1994 (annotated). RAMSEY CRITICAL RIVER VARIANCE P 2 OF 2. I I I I I I I I I I I I I I I I I ! I