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`STALE OF CALIFORNIA—BUSINESS TRANSPOR" 7N AND HOUSING AGENCY GRAY DAVIS,Go.'emor Iftwe `J DEPARTMENT OF TRANSPORTATION P.O.BOX 2048(1976 E.CHARTER WAY) STOCKTON,CA 95201 TDD (209)948-7981 PHONE (209)941-1921 FAX (209)948-7194 Flex yovrpmver! Be energy efficient! June 27, 2002 JUL 01 10-SJ-5-47.64 Com r.. ..y DeyeIopment Dep(, Site Approval Application PA-0200247 Jadwinder Singh Ms. Leanne Mueller San Joaquin County Community Development Department 1810 E. Hazelton Avenue Stockton, CA 95205 Dear Ms. Mueller: Caltrans has reviewed the above Application (PA-0200247) for a mini-mart/gas station with car wash and a fast food restaurant with drive-thru. The proposed project site is located on the west side of Thornton Road, on the northwest corner with Walnut Grove Road, Thornton (APN 001-140-40). • The Site Approval Application states the proposed project will generate 300 vehicle trips per day. Caltrans has reviewed the Institute of Transportation Engineers (ITE), 6th edition, and finds the applicant's proposed traffic number significantly low for this type Of project. For example, on page 1,400 of the ITE manual, a drive-thm restaurant generates 496 For ends per 1,000 square feet. The proposed 2,500 square foot restaurant would therefore generate approximately 1,240 vehicle trips per day. In addition, Land Use 846 in the ITE claims the vehicle trips for a mini mart and gas station are approximately 153 per fuel station. The proposed project identifies six fueling stations, for a total of 918 vehicle trips per day. This equates to about 2,157 daily vehicle trips with the restaurant and mini mart/gas station combined. This represents a significant increase in vehicle trips as compared to the applicant's estimation, and combined with the close proximity of the proposed project to the northbound ow-amp to Interstate 5, Caltrans requires a fall and complete traffic study to adequately determine potential mitigation needed as a result of this project. Caltrans has created a Guide for the Preparation of Traffic Impact Studies to assist project proponents and local agencies in understanding the informational needs of Caltrans during the early planning processes. Please refer to this guide to ensure sufficient information is included in the project's traffic study. If you need a copy of this guide, please call Mike Higgins, at (209) 948-3996 to request one. • Caltrans requires a complete set of drainage plans to verify that storm and non- stormwater discharges will remain on site and not affect the northbound Interstate 5 onramp. • Caltrans requires site plans that delineate the proposed project's location in relation to Caltrans right-of-way. This will enable Caltrans to determine if dedication and/or setbacks are required. `Caltrans improves mobility across Califomia' 60 M.SJ N TUMSINGH4M"MOVAL APPYA-0200241 HIGGINS.ra