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Other potential existing sources of contamination(i.e.,septic systems,refuse piles,waste ponds, electrical transformers containing PCBs)on the project site and off-site infrastructure sites shall be identified and removed under the supervision of qualified hazardous materials experts and in y accordance with applicable regulations before construction.The applicant shall demonstrate to the County Environmental Health Department that the above has taken place before issuance of building permits. If the experts observe potential soil contamination or noxious odors associated with these facilities,the soils underlying these facilities shall be sampled and tested by the experts. If the testing reveals contamination,the regulatory agencies shall be contacted,any recommendations made by the experts shall be implemented, and the County Environmental Health Department shall identify"no further actions required"before project construction access at these locations. y Phase I ESAs shall be prepared by qualified hazardous materials experts for areas in Granit Line Village that are the subject of future development proposals before construction in these areas. The ESAs shall be reviewed and approved by the County Environmental Health Department.Any recommendations made in the ESAs(monitoring,Phase H testing,mitigation,etc.)shall be implemented. Project grading, excavation, and other earth-moving activities directly adjacent to the off-site parcel where the December 4,2003 crude oil release took place shall not occur until it has been verified, either by the assessment currently being conducted by the RWQCB or separate soil and groundwater _ sampling commissioned by the College Park developers,that the contamination associated with the incident has not migrated to the College Park site. If the contamination has migrated to the College Park site,it shall be fully remediated to the satisfaction of the County Environmental Health Department before project construction activities in the contaminated area. Project construction activities at hazardous materials sites#3 and 7(identified in Figure 4.9-2 and Table 4.9-1) shall occur only after any contamination that may exist at these sites has been fully remediated to the satisfaction of the County Environmental Health Department,the status of the sites has been changed to"no further action required"in the regulatory agency databases,and the facilities that are the source of any contamination have been removed in accordance with applicable regulations.The project developers may attempt to advance the above,if they desire,by conducting their own investigations of these sites in coordination with the property owners and regulatory agencies,and working with the regulatory agencies to accomplish the above. Before demolition,renovation,or modification of structures on the project site and off-site infrastructure sites constructed before 1981 (parcels containing such structures are listed in Table 4.9- 2),the project developers shall contract with qualified hazardous materials experts to survey these buildings for asbestos and lead-based paint.Demolition,renovation,or modification of any structures identified as containing asbestos or lead-based paint shall be performed by a licensed asbestos and lead-based paint abatement contractor in accordance with applicable regulations. Implementation of the above mitigation measure would reduce impacts associated with possible exposure of people to pre-existing hazardous materials during construction to a less-than-significant level. IMPACT Public Health and Safety—Possible Exposure to Hazardous Materials Associated with Upset and 4.9-2 Accident Conditions During Construction and Operation. The proposed project would not use large quantities of hazardous materials that would be subject to potential upset and accident conditions,and although project construction activities would occur in the vicinity of existing natural gas and crude oil pipelines,project compliance with the requirements and mitigation measures of the MHMP and MHMP MMP would avoid potentially significant upset and accident conditions involving these pipelines.A less-than significant impact would occur. College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.9-31 Public Health and Safety