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2.Executive Summary TABLE 2-1 (CONTINUED) SUMMARY OF IMPACTS AND MITIGATION MEASURES Environmental Impact Mitigation Measures Level of Significance (Level of Significance Prior to Mitigation) After Mitigation Regional Water Quality Control Board,or the San in conjunction with or prior to continued project Joaquin County Environmental Health Department. construction and/or mining activities. Encountering contaminated soil,surface water,and groundwater without taking proper precautions could result in the exposure of construction workers and consequently result in associated significant adverse human health and environmental impacts.This would be a potentially significant impact.(PS) 4.11.2 During excavation,grading,and construction activities of 4.11.2 The project applicant shall ensure that all contractors and Less than Significant the proposed facilities,it is anticipated that limited employees immediately control the source of any leak - quantifies of miscellaneous hazardous substances,such and immediately contain any spill utilizing appropriate as gasoline,diesel fuel,hydraulic fluid,solvents,oils,etc. spill containment and countermeasures.If required by would be brought onto the site.In addition,the proposed any regulatory agency,contaminated media shall be project operations will include the use of fuels and other collected and disposed of at an offsite facility approved to hazardous materials.As with any liquid and solid,during accept such media. In addition,all precautions required handling and transfer from one container to another,the by the RWQCB issued NPDES construction activity storm potential for an accidental release exists.Depending on water permits would be taken to ensure that no the relative hazard of the material,if a spill were to occur hazardous materials enter any nearby waterways. of significant quantity,the accidental release could pose both a hazard to construction employees as well as the environment.This would be a potentially significant impact.(PS) 4.11.3 The project would involve the installation and use of No mitigation is required. above-ground fuel storage tanks,and the storage and use of solid waste and hazardous materials.This would be a less-than-significant impact.(LS) 4.11.4 Exposure of the existing and future residents near the 4.11.4 The silt ponds and the mining pits proposed as a part of Less than Significant project area to potentially high levels of nuisance and the project should be properly designed and maintained disease vectoring mosquitoes from the addition of silt so that they do not breed mosquitoes.The design and ponds and mining pits that could contain storm water on maintenance of the basins should be done in consultation the project site would be a significant health hazard. with the San Joaquin County Mosquito Abatement District Mosquitoes are vectors of diseases such as malaria, and the East Side Mosquito Abatement District in encephalitis,West Nile virus,and canine heartworm Stanislaus County. disease.This would be a potentially significant impact. (PS) 4.11.5 Records maintained at the San Joaquin County No mitigation is required. Agricultural Commissioner show that restricted pesticides RMC Parc Vemalm Quarry Mining and Reclamation Project 2-25 ESA/Project No 203015 Draft Environmental Impact Report May 2006