ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

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A records search conducted by the CCIC indicated that several previous cultural resources investigations have been completed within and in the vicinity of the project area. However,none of those studies resulted in the identification of historical or prehistoric resources in the project area. One prehistoric property(CCIC resource no. P-39-282)had been identified within 1/8 mile of the project area(the large mound overlooking the San Joaquin River,the site of a major Yokuts village),but the site had been confirmed(by Self et al. 1999)as having been destroyed. The CCIC records search information was supplemented with a field survey performed by an EDAW cultural resources specialist on August 29 and 30,2006, consistent with the policies of the City general plan(Policies RC- P-37 and RC-P-38).No archaeological or historical resources were identified during the survey. Because there are no known recorded archeological sites, features, or artifacts or historical resources within the surveyed portions of project area,the project's impacts on known archeological and historical resources in the surveyed portions of the project area would be less than significant. IMPACT Cultural Resources—Damage to or Destruction of Undiscovered Cultural Resources.Portions of the 4.12.2 project area(including a 3.35-mile segment of the pipeline route for the proposed wastewater collection system and a 1.5-mile portion of the pipeline alignment for the recycled-water distribution system)could not be surveyed because access to these areas was limited. CCIC records searches did not indicate presence of known cultural resources in these areas;however, because these areas could not be surveyed, the potential exists to uncover previously undiscovered resources during project construction. Furthermore, construction-related subsurface disturbances could potentially destroy or damage previously undiscovered prehistoric or historic cultural resources at the wastewater quality control facility(WQCF),pumping station sites, and side-bank outfall site, and along the pipeline alignments. Because these resources have the potential to represent"unique archaeological resources"or"historic resources"as defined by CEQA, this impact would be potentially significant. The project sites are located in a region where significant prehistoric and historic-era cultural resources have been documented.No"unique"or"historic"cultural resources(as per CEQA definitions)have been documented at the WQCF or along the alignments proposed for the wastewater collection system and recycled-water pipelines; however, findings of the records search and of previous investigations within the vicinity of the project site have revealed that there is potential for unrecorded cultural resources to be unearthed or otherwise discovered at the project area during ground-disturbing and construction activities. Furthermore, a 3.35-mile portion of the pipeline alignment for the proposed wastewater collection system, a 1.5-mile portion of the pipeline alignment for the recycled-water distribution system,pumping station sites,and the side-bank outfall site have not been surveyed because of site access and other limitations. There is a possibility that previously unrecorded prehistoric and/or historic resources could be situated directly within the unsurveyed 3.35-mile portion of the collection system alignment(2.05 miles in the southwestern portion of the project area near the intersection of Peach Avenue and Airport Way, and approximately 1.3 miles in the center of the western portion of the project between Yosemite and Louise Avenues, and west of Airport Way),the unsurveyed 1.5-mile portion of the pipeline alignment for the recycled-water distribution system(including 0.96 mile in the central portion of the project area between Swanson Road and West Center Street north of Yosemite Avenue, and 0.54 mile in the southwestern portion of the project area south of Woodward Avenue),pumping station sites,and the side-bank outfall site. Such resources could be determined to be unique or historic; therefore,this impact would be potentially significant. IMPACT Cultural Resources—Discovery of Human Remains during Construction.Although no evidence 4.12-3 suggests that buried human remains would be encountered during project construction, the potential exists for buried human remains to be encountered and for construction activities to result in damage to or destruction of such remains. This impact would be potentially significant. Although no evidence for prehistoric or early historic interments was found in the proposed project site in surface contexts,this does not preclude the existence of buried human remains. Furthermore,human remains have EDAW Manteca WQCF and Collection System Master Plans EIR Cultural Resources 4.12-10 City of Manteca