SITE INFORMATION AND CORRESPONDENCE

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i FilloslDobler Annexation and Development Project + Environmental Impact Report TRACY anticipated that future development of the proposed Project would use groundwater located within the Project area as a potable water source. r Railroad Right-of-Way ow The UPRR Railroad is located along the southern boundary of the Project site. Active and inactive railroad beds frequently have concentrations of petroleum,products and lead elevated above natural background conditions. Petroleum product concentrations and .lead concentrations are derived from drippings from rail vehicles and flaked paint, respectively. Wooden railroad ties may contain preservatives (i.e., creosote), some of which may contain hazardous constituents. Track switch locations often have elevated levels of petroleum hydrocarbons. Inorganic and organic herbicides, along with VOW diesel fuel, may have been used for vegetation control. As the proposed Project would not involve the disturbance of existing or historical railroad rights-of-way, it is unlikely that the Project would involve the disturbance of potential hazardous materials in the soil as a result of offsite railroad activities. Thus, impacts in this regard would be less than significant, Conclusion Remediation activitiescould Yexpose-con struction workersxto a variety of potentially hazardous materials. II� Although remedial processes are yet to be determined, site remediation activities are strictly controlled by federal, state and local requirements. Toxic or hazardous materials would be handled in strict accordance with existing laws and regulations., Although implementation of Mitigation Measures 4.10-1a through 4.10-If would reduce potential impacts;from site disturbance activities, accidental conditions may arise during construction of future development within the Project site. If unknown wastes or suspect materials are discovered during construction I y the contractor, which he/she believes may involve hazardous wastes/materials,the contractor would be required to implement Mitigation Measure 4.10-1 g. Therefore, with implementation of Mitigation Measures 4.10-1a through 4.10-1g and compliance with applicable federal, state and local regulatory requirements pertaining to hazardous materials, potential accidental releases would be reduced to less than significant levels.. Mitigation Measures: 4.10-1a Prior to demolition and/or rehabilitation activities, an asbestos survey shall be conducted by an Asbestos Hazard Emergency Response Act (AHERA) and California Division of Owl Occupational Safety and Health (CaVOSHA)certified building inspector to determine the presence or absence of asbestos-containing materials (ACMs). If ACMs are located, abatement of asbestos shall be completed prior to any activities that would disturb ACMs or create an airborne asbestos hazard. Asbestos removal shall be. erfonned b a State P Y certified asbestos containment contractor in accordance with the San Joaquin Valle Air q Y Pollution Control District(SJVAPCD)Rule 4002. 4.10-lb If paint is separated from building materials (chemically or physically) during demolition of the structures, the paint waste shall be-evaluated independently from the building material for lead by a qualified Environmental.Professional. If lead-based paint is found, abatement..shall be completed by a qualified Lead Specialist prior to any activities that would create lead dust or fume hazard. Lead-based paint removal and disposal-shall be performed in accordance with California Code of Regulation'Titic 8, Section 1532..1, } which specifies exposure limits, exposure monitoring and respiratory protection, and Hazards and Hazardous Materials 4.10.14 Draft •June 2011 Nm'„