14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Initial Study/Consistency Checklist Environmental Checklist FirstCarbon Solutions 117 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480021/Consistency Checklist/21480021 Spotorno Ranch Consistency Checklist ScreenCheck.docx a) Water Quality Would the project: Violate any water quality standards or waste discharge requirements or otherwise substantially degrade surface or ground water quality? This question was not included in the 1998 HVSP FEIR. No determination was made in the 1998 HVSP FEIR regarding the significance level of impacts associated with water quality. However, the 1998 HVSP FEIR determined that the installation of a public water supply and connection to the City water system would improve the quality of the water supplied to and consumed by area residents to meet safe drinking water standards, which would be a beneficial impact. Construction The developer would be required to obtain a NPDES permit issued by the RWQCB. Under the NPDES permitting program, the preparation and implementation of SWPPPs are required for construction activities more than 1 acre in size. The SWPPP must identify potential sources of erosion or sedimentation that may be reasonably expected to affect the quality of stormwater discharges as well as identify BMPs that ensure the reduction of these pollutants during stormwater discharges. Typical BMPs used for erosion control include sandbags, detention basins, silt fencing, landscaping, hydroseeding, storm drain inlet protection, street sweeping, and monitoring of water bodies. Prior to construction grading, the project applicant would file a Notice of Intent to comply with the General NPDES Permit issued by the RWQCB and prepare the SWPPP, which addresses the measures that would be included in the project to minimize and control construction and post-construction runoff to the “maximum extent practicable.” In addition, development of the project would be required to comply with the Municipal Code requirements pertaining to grading and excavation. Site grading within project would include cuts varying in depth to 15 feet, with fills varying up to 25 feet deep. Retaining walls are also included in the site plan development. Furthermore, the landscaping plans would implement strategies to reduce soil loss during the operational lifetime of the project. Adherence to the General Permit would ensure that the project does not violate water quality standards or waste discharge requirements. Operation Operational activities would involve vehicle use, landscape maintenance, and routine maintenance of structures. Leaks of fuel or lubricants, tire wear, brake dust, and fallout from exhaust contribute petroleum hydrocarbons, heavy metals and sediment, which may result in the pollutant load in runoff being transported to receiving waters. Runoff from landscaped areas may contain residual pesticides and nutrients. Consequently, the long-term degradation of runoff water quality in downstream waterways could result from the implementation of the project. However, the project would be required to comply with Chapter 9.14 Stormwater Management and Discharge Control of the City of Pleasanton Municipal Code. Chapter 9.14, also known as the City of Pleasanton Stormwater Management and Discharge Control Ordinance, requires implementation of BMPs and compliance with general permits. Design features would comply with the County’s current NPDES permit and Clean Water Program Stormwater C.3 Guidebook. Compliance with the Stormwater Management and Discharge Ordinance would ensure the implementation of stormwater quality