SU0014502 - Laserfiche WebLink

Home Browse Search

Administrative Draft Environmental Impact Report Gill Medical Center Project 4.14 MINERAL RESOURCES This section includes a mineral resources environmental setting and addresses potential project effects on mineral resources in the project vicinity. 4.14.1 Environmental Setting Mineral resources within San Joaquin County consist primarily of sand and gravel aggregate, with limited mining of peat, gold, silver, and gas. In the past, placer gold deposits have been found in many San Joaquin County rivers and creeks. These deposits were dredged for gold by independent operators in the years following the 1849 gold rush. Peat soil removal occurred during the 1970s and 1980s. Current mining operations within the County are primarily related to sand and gravel aggregate operations.A former gas well (referred to as the "North Stockton Unit A" 1 well, AP1:0407700519) which was converted to a water well in July 1962 (California Department of Conservation Geologic Energy Management Division [CaIGEM] 2020) is located on the Project site and has been used as an agricultural irrigation well since the conversion. According to the California Geologic Energy Management Division (CaIGEM), which oversees oil, natural gas and geothermal wells, it is not known if the conversion to a water well included implementation of appropriate CaIGEM gas well abandonment procedures consistent with current standards. 4.14.2 Regulatory Setting 4.14.2.1 State Surface Mining and Reclamation Act(SMARA) of 7975 As mandated by the Surface Mining and Reclamation Act, the California Geological Survey has classified mineral resource development potential of lands in counties into an appropriate Mineral Resource Zone (MRZ), in accordance with the California Mineral Land Classification System. Local agencies are required to use this information when developing land use plans and when making land use decisions.The MRZ classifications include: MRZ-1 —Areas of No Mineral Resource Significance MRZ-2—Areas of Identified Mineral Resource Significance MRZ-3—Areas of Undetermined Mineral Resource Significance MRZ-4—Areas of Unknown Mineral Resource Significance The Mineral Land Classification Map, prepared by the California Division of Mines and Geology, designates the project site and surrounding lands as MRZ-1.An MRZ-1 designation in the Stockton-Lodi region indicates that the soils contain excessive amounts of clay, silt, or other deleterious material for use as Portland cement concrete-grade aggregate (DOC 2017). Neither the City of Stockton nor San Joaquin County General Plan has identified any mineral resources on or near the project site. Mineral Resources 4.14-1 October 2021