14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Environmental Checklist Initial Study/Consistency Checklist 110 FirstCarbon Solutions https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480021/Consistency Checklist/21480021 Spotorno Ranch Consistency Checklist ScreenCheck.docx Therefore, the proposed project would not result in any peculiar effects and would not result in new or more severe impacts related to the routine transport, use, or disposal of hazardous materials beyond what was previously analyzed in the 1998 HVSP FEIR. b) Risk of Upset Would the project: Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment? The 1998 HVSP FEIR determined that chemicals used in association with past land uses on the site (petroleum hydrocarbons, aromatic hydrocarbons, volatile organics, metals, pesticides, and herbicides) could present a health risk to workers involved in site development activities and future site and off-site users if the chemicals had been released to soil and groundwater. The 1998 HVSP FEIR determined that potential impacts could be mitigated by the preparation of a Phase I Environmental Site Assessment (Phase I ESA) pursuant to MM I1; preparation of a Phase II ESA and additional mitigation measures, if appropriate, pursuant to MM I2; inventories of the interior areas of all on-site agricultural structures prior to demolition and transportation to and disposal/recycling of any discovered hazardous materials at an appropriate off-site facility, pursuant to MM I4; and monitoring of removal of the floors/foundations to determine whether hazardous materials spills are present or suspected to have occurred in these areas, with appropriate follow-up measures, pursuant to MM I5. The 1998 HVSP FEIR also required compliance with the applicable regulations to prevent exposure to lead or asbestos from demolition activities. The 1998 HVSP FEIR concluded that impacts would be less than significant with implementation of these mitigation measures. As discussed under the previous question, construction-related activity associated with the proposed project would be required to adhere to all applicable regulations. Removal and disposal of hazardous materials from the project site would be conducted by an appropriately licensed contractor. Any handling, transporting, use, or disposal would comply with applicable laws, policies, and programs set forth by various federal, state, and local agencies and regulations, including the EPA, RCRA, and City of Pleasanton Chapter 9.21 regarding construction and demolition debris. No demolition of structures is proposed on the project site; therefore, the proposed project would not result in exposure to lead- based paint or asbestos containing materials (ACM). Hazardous materials used on-site during operations may vary, but would likely be limited to fertilizers, herbicides, pesticides, solvents, cleaning agents, and similar materials used for daily residential operations and maintenance activities. These types of materials are common for residential developments such as the project and represent a low risk to people and the environment when used as intended. As such, development of the project would not create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the likely release of hazardous materials into the environment. Pursuant to MM I1, a Phase I ESA was prepared for the project site on January 9, 2015, by ENGEO Inc. (Appendix E). Additional mitigation would not be applicable to the proposed project. Therefore, the proposed project would not result in any peculiar effects and would not result in new or more