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Redwood City Costco Gasoline Expansion ProjE 7.A. - Page 248 August 20,2012 ruye 30 APPROACH #1: TRIP GENERATION BASED ON EQUAL OR GREATER ACTIVITY SITES Given that the existing transaction numbers and sales volume at the Redwood City location are equivalent to or lower than the representative sites and that the data shows that trip generation is not directly related to number of fueling positions, a possible trip generation estimate was prepared by taking an average from all of the representative 16 and 20 island facilities in the database. Given that activity at all of these locations is reported to be higher than was currently occurs at the Redwood City location, it is likely would be an appropriate estimation for the project. Table 12 summarizes the total fuel station trip generation estimated under an expanded scenario based on data from the representative 16 and 20 fueling position locations. It also summarizes the trip type breakdown for the estimate given the existing internal trip capture, pass-by, and diverted trip rates determined from survey data collected at the Redwood City Costco site in May 2011 and compares the trip generation estimate under the expanded scenario to the trip generation of the existing site. Table 12 Approach #1: Expanded (20 Fueling Position) Redwood City Costco Gasoline Trip Generation Estimate Based on Equal or Greater Activity Sites— Weekday PM Peak Hour Existing Site 5 Island Expanded Trip Generation Trip Generation Difference In Out Total In Out Total In Out Total Total Trip Ends 200 200 400 215 215 430 15 15 30 Internal Trips(22%PM) (45) (45) (90) (45) (45) (90) (0) (0) (0) External Trips 155 155 310 170 170 340 15 15 30 Pass-by Trips(22%PM) (35) (35) (70) (35) (35) (70) (0) (0) (0) Diverted Trips(59%PM) (90) (90) (180) (100) (100) (200) (10) (10) (20) Net New Trips 30 30 60 35 35 70 5 5 10 As shown in Table 12, applying this approach results in an estimate of approximately 430 total trip ends and 70 net new trip ends during the weekday p.m. peak hour. This equates to increase of 30 additional external trip ends and 10 additional net new trip ends over what the site is currently generating during the weekday p.m. peak hour. APPROACH #2: TRIP GENERATION BASED ON HIGHEST OBSERVED 5 ISLAND LOCATION The second approach used to develop a trip generation range for the proposed project was to review the existing activity and trip generation for the other 5 island (20 fueling position) Costco Gasoline locations that existing in the continental United States. Transactions and sales volume data from the Kittelson&Associates,Inc. Boise,Idaho