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This project area is located outside the southern border of the City of Tracy. It does not contain any historic structures and is not considered a site of noted historical significance. Analysis of Potential Impacts: Describe to what extent project activities would: a. Cause a substantial adverse change in the significance of a historical resource as defined in 15064.5. Less Than Significant Impact. The initial field reconnaissance did not reveal any known historical resources located directly on the project site. The old vehicles and dilapidated structures surviving the fire are from the second half of the 20'h Century, and do not appear to be affiliated with any person or event of historic significance. The Central California Information Center(CCIC)within the California Historic Resources Information System (CHRIS) has been consulted.The CCIC has formally replied to our request for a cultural and historic resources records search for the project site. The CCIC file search indicated that no historic or prehistoric resources within the project area or in the vicinity of the project area have been reported to the CCIC. In addition, no resources within the project area that are known to have value to local cultural groups have been reported to the CCIC. The CCIC file search concluded that because the"Tesla Branch" of the Western Pacific Railroad bordered part of the project site (along the northwest and west side of project area)there is a low-to-moderate possibility of remnants of the railroad and associated historic artifacts existing in the area, and they recommended an archaeological survey be conducted at the Site to verify whether this may be an issue of concern . LFR contacted the Native American Heritage Commission (NAHC) on September 3, 2003. The NAHC was provided with a project description and contact information regarding the proposed Tracy Tire Fire Site remediation activities. LFR, the DTSC, and the CIWMB will coordinate with the NAHC and other Native American representatives as necessary. As previously described, the project site is an excavated gravel pit. Historic resources are not expected to be present. A local archaeological firm, Pacific Legacy Incorporated (PLI), was contacted and provided with site information and CCIC file search results. Mr. John Holson, on behalf of Pacific Legacy, prepared a Cultural Resources Assessment for the project area and concluded that the survey for historic resources recommended by the CCIC would not result in the identification of any resources (Pacific Legacy 2003). Mr. Holson's conclusion was based on several reasons. First, the entire project area has been significantly excavated (to depths exceeding 50 feet below original grade in most areas). Second, no subsurface ground disturbance will occur in areas outside of the project area. Third, the potential existence of the Tesla Branch of the Western Pacific Railroad (if it exists)would exist outside the project area. Based on this information, remnants of any surface or subsurface features would have been previously removed or obliterated many years ago when the site was mined as a gravel quarry. Mr. Holson stated that no further archaeological studies should be necessary unless project plans changed to include unsurveyed areas on original ground surface or if cultural materials are encountered during construction. b. Cause a substantial adverse change in the significance of an archeological resource pursuant to 15064.5. 25