RES 221270 - Laserfiche WebLink

Environmental Checklist Geology and Soils Final Initial Study – Negative Declaration 49 including low-impact development (LID) strategies such as bioswales, rain catchment basins, and green roofs. Additionally, CAP 2.0 Action P13 would involve the planting of new trees throughout the City. CAP 2.0 projects and actions would be reviewed for consistency with Pleasanton General Plan and PMC and other local and State erosion and grading regulations prior to final siting and construction. The potential for CAP 2.0 project construction activities involving soil disturbance to result in increased erosion and sediment transport by stormwater to surface waters would be minimized, because future projects would be required to comply with the Pleasanton Standard Specifications and Details, which include erosion and sediment control standards, and/or a the National Pollutant Discharge Elimination System (NPDES) Construction General Permit provided by the Regional Water Quality Control Board.58 These regulations require best management practices (BMPs) such as the covering of graded slopes and stockpiled materials, storm drain protection, and use of fiber rolls and silt fences to reduce erosion and topsoil loss from stormwater runoff. Compliance with the Pleasanton Standard Specifications and Details and/or Construction General Permit would ensure that BMPs are implemented during construction and minimize substantial soil erosion or the loss of topsoil. Therefore, the CAP 2.0 would result in a less-than-significant impact related to soil erosion and loss of topsoil. c. Would the project be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction, or collapse? d. Would the project be located on expansive soil, as defined in Table 1-B of the Uniform Building Code (1994), creating substantial direct or indirect risks to life or property? According to the Pleasanton General Plan Public Safety Element, Pleasanton contains approximately 12,000 acres of land concentrated in the northernmost portion of the City, the center of the City, and along the I-680 corridor at risk of liquefaction. Most of Pleasanton is characterized by low to no potential for landslides, other than in the areas adjacent to Pleasanton Ridge and Southeast Hills. Expansive soils are known to be present in the northern and northwestern portions of Pleasanton, and moderate potential for expansive soils exists throughout the rest of the City. Lateral spreading, subsidence, and other soil-related risks are generally low throughout the City.59 The Pleasanton General Plan Public Safety Element, PMC, and California Building Code (CBC) contain regulations for structural design and soil hazards in order to mitigate potential impacts related to unstable soils. The CAP 2.0 is a policy document containing programs that are consistent with the Pleasanton General Plan. Some of the proposed policies in the CAP 2.0 would support small-scale construction projects, such as EV charging stations. However, CAP 2.0 projects and actions would be reviewed for consistency with local and State geotechnical regulations prior to final siting and construction. New structures would be required to comply with PMC Chapter 20.06, Existing Building Code, which adopts the latest CBC, including measures to address unstable soil conditions.60 Therefore, the CAP 2.0 would result in a less-than-significant impact related to risks associated with location on unstable geologic unit or soil or on expansive soils. 58 Pleasanton, City of. 2016. Pleasanton Standard Specifications and Details. Available: <http://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=28996>. Accessed October 13, 2021. 59 Pleasanton, City of. 2009. Pleasanton General Plan Public Safety Element. Available: <https://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=23899>. Accessed October 13, 2021. 60 Pleasanton, City of. 2021. Pleasanton Municipal Code Chapter 20.06. Available: <https://qcode.us/codes/pleasanton/>. Accessed October 14, 2021.