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3. Environmental Checklist <br /> <br />San Leandro Treatment Wetland <br />IS/MND <br />3-52 February 2024 <br /> <br />3.13. Mineral Resources <br />ISSUES: MINERAL RESOURCES <br />POTENTIALLY <br />SIGNIFICANT <br />IMPACT <br />LESS THAN <br />SIGNIFICANT <br />WITH <br />MITIGATION <br />INCORPORATED <br />LESS THAN <br />SIGNIFICANT <br />IMPACT <br />NO IMPACT <br />Would the Project: <br />a) Result in the loss of availability of a known <br />mineral resource that would be a value to the region <br />and the residents of the state? <br />☐ ☐ ☐ ☒ <br />b) Result in the loss of availability of a locally <br />important mineral resource recovery site delineated <br />on a local general plan, specific plan or other land <br />use plan? <br />☐ ☐ ☐ ☒ <br />Discussion <br />a,b) Impacts to mineral resources. The Proposed Project site is situated in an area classified as MRZ-1, <br />where no significant mineral deposits are known to exist.41 Additionally, the site does not host any <br />mines, mineral processing plants, or oil, gas, or geothermal wells.42 <br />San Leandro's General Plan notes that the city's primary mineral resources are volcanic rocks, such as <br />basalt, andesite, and rhyolite. Rhyolite from the East Bay Hills has been a key material in construction <br />and development projects for over a century. The city's only quarry, located east of the city limits on <br />Lake Chabot Road, ceased operations in the 1980s. Operational since 1886, this quarry produced <br />aggregate and fill material for numerous construction projects across the East Bay. While additional <br />rock resources remain at the site, future quarrying is unlikely due to potential environmental impacts <br />and the challenges of obtaining permits.43 <br />Local land use plans do not recognize any locally important mineral resources at the Project site. The <br />Proposed Project does not include any mining activities. As such, the construction or operation of the <br />Project will not impact, destroy, or restrict access to any significant existing mineral resources. <br />Impact Designation: No impact <br />Cumulative Impacts on Mineral Resources <br />Since the Project is not expected to impact mineral resources, it consequently would not contribute to any <br />cumulative impacts in this regard. <br /> <br />41 California Department of Conservation, Division of Mines and Geology. 1987. Mineral Land Classification: Aggregate Materials in the San <br />Francisco-Monterey Bay Area, Special Report 146, Part II, Plate 2.23. Available online at <br />https://ia804701.us.archive.org/33/items/minerallandclass00stin/minerallandclass00stin.pdf Accessed November 22, 2023. <br />42 Geologic Energy Management Division (CalGEM). Well Finder. Available at <br />https://www.conservation.ca.gov/calgem/Pages/Wellfinder.aspx Accessed on November 22, 2023. <br />43 City of San Leandro. 2016. San Leandro 2035 General Plan, Chapter 6: Open Space, Parks, and Conservation. Available at <br />https://www.sanleandro.org/332/General-Plan