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QX-91-0006 (RAA) Project - 4 - 18 October 2019 San Joaquin County Clean Water Act Section 401 Permit— Water Quality Certification If an USACE permit (e.g., Non-Reporting Nationwide Permit, Nationwide Permit, Letter of Permission, Individual Permit, Regional General Permit, Programmatic General Permit), or any other federal permit (e.g., Section 10 of the Rivers and Harbors Act or Section 9 from the United States Coast Guard), is required for this project due to the disturbance of waters of the United States (such as streams and wetlands), then a Water Quality Certification must be obtained from the Central Valley Water Board prior to initiation of project activities. There are no waivers for 401 Water Quality Certifications. For more information on the Water Quality Certification, visit the Central Valley Water Board website at: https://www.waterboards.ca.qov/centraIvaIley/water issues/water quality certificati on/ Waste Discharge Requirements — Discharges to Waters of the State If USACE determines that only non-jurisdictional waters of the State (i.e., "non- federal" waters of the State) are present in the proposed project area, the proposed project may require a Waste Discharge Requirement (WDR) permit to be issued by Central Valley Water Board. Under the California Porter-Cologne Water Quality Control Act, discharges to all waters of the State, including all wetlands and other waters of the State including, but not limited to, isolated wetlands, are subject to State regulation. For more information on the Waste Discharges to Surface Water NPDES Program and WDR processes, visit the Central Valley Water Board website at-https://www.waterboards.ca.gov/centralvalley/water issues/waste to surface w ater/ Projects involving excavation or fill activities impacting less than 0.2 acre or 400 linear feet of non-jurisdictional waters of the state and projects involving dredging activities impacting less than 50 cubic yards of non-jurisdictional waters of the state may be eligible for coverage under the State Water Resources Control Board Water Quality Order No. 2004-0004-DWQ (General Order 2004-0004). For more information on the General Order 2004-0004, visit the State Water Resources Control Board website at: https://www.wate.rboards.ca.gov/board decisions/adopted orders/water quality/20 04/wqo/wgo2004-0004.pdf Waste Discharge Requirements — Discharges to Land Before beginning mining, the property owner and operator (together) are required to have WDRs or other documents from the Regional Water Quality Control Board allowing discharge to land of mining waste. Mining waste as defined in the Porter- Cologne Water Quality Control Act is, "all solid, semisolid, and liquid waste materials from the extraction, beneficiation, and processing of ores and minerals. Mining waste includes, but is not limited to, soil, waste rock, and overburden, as defined in Section 2732 of the Public Resources Code, and tailings, slag, and other processed waste materials, including cementitious materials that are managed at the cement manufacturing facility where the materials were generated." This definition is very broad and covers all mining materials. Therefore, if you are planning to mine a report of waste discharge must be submitted with the proper