RES 211231 Exhibit A - Laserfiche WebLink

Environmental Checklist and City of Pleasanton–10x Genomics Project Environmental Evaluation Initial Study/Mitigated Negative Declaration 104 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480024/ISMND/wp/21480024 10x Genomics Project Full Screencheck ISMND.docx Since the human ear is not equally sensitive to sound at all frequencies, dBA was derived to relate noise to the sensitivity of humans, it gives greater weight to the frequencies of sound to which the human ear is most sensitive. The A-weighted sound level is the basis for a number of various sound level metrics, including the day/night sound level (Ldn) and the Community Noise Equivalent Level (CNEL), both of which represent how humans are more sensitive to sound at night. In addition, the equivalent continuous sound level (Leq) is the average sound energy of time-varying noise over a sample period and the Lmax is the maximum instantaneous noise level occurring over a sample period. Regulatory Framework The project site is located within the City of Pleasanton, in the County of Alameda. The City of Pleasanton addresses noise in the Noise Element of its General Plan 87 and in the City’s Municipal Code.88 General Plan The Pleasanton General Plan 2005-2025 establishes noise standards and policies for various land uses. The City’s General Plan addresses land use compatibility, acceptable interior noise levels, and substantial permanent increase criteria. These standards and policies are summarized below. The City has established land use compatibility standards for residential and non-residential land uses (shown in Table 18). The land use category that is applicable to this project is Office Buildings, Business, Commercial, and Professional. Under this designation, noise environments with ambient noise levels up to 70 dBA Ldn are considered “Normally Acceptable” for Office Buildings, Business, Commercial, and Professional land use developments. Noise environments with ambient noise levels from 70 dBA Ldn to 80 dBA Ldn are considered “Conditionally Acceptable” for Office Buildings, Business, Commercial, and Professional land use developments; under this circumstance, development may be permitted only after detailed analysis of the noise reduction requirements and needed noise insulation features are included in the design. Conventional construction, but with closed windows and a fresh air supply system or air conditioning, will normally suffice as a noise insulation feature for these conditionally acceptable environments. The City has established its own criteria governing the evaluation of substantial increases in permanent noise. According to the City’s General Plan, an exterior increase of more than 4 decibels is considered significant. The following goals, policies, and programs of the City of Pleasanton General Plan 2005-2025 are applicable to the proposed project: Goal 1 Reduce noise to acceptable levels throughout the community. 87 City of Pleasanton. 2009. Pleasanton General Plan 2005-2025. July 21. Website: https://www.cityofpleasantonca.gov/gov/depts/cd/planning/general.asp. Accessed December 18, 2020. 88 City of Pleasanton. 2019. Pleasanton Municipal Code. Website: https://qcode.us/codes/pleasanton/. Accessed December 18, 2020.