2016-012 - California Environmental Quality Act

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Statement of Facts and WQMP that would detail the appropriate non - structural, structural, and source control and treatment control BMPs implemented onsite and designed to protect surface water quality. Implementation of BMPs per the WQMP would reduce potential impacts to surface and ground water quality du ing project operation to a less than significant level. 3. The project would not substantially deplete groundwater supplies or interfexe substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level. Groundwater use and infiltration in the project area and vicinity is prohibited due to the existence of a subsurface plume identified by OCWD and above a natural pollutant source area (e.g., selenium). As such, the proj cot would not use groundwater resources or infiltrate water into the existing groundwater basin. In addition, constriction water uses, such as those associated with dust control and sanitation, are anticipated to be minimal; and the Water Supply Assessment (WS A) prepared for the project concluded that the project would result in a less than significant impact on water supplies. As such, the project would not substantially deplete groundwater supplies, and impacts would be less than significant. 4. The project would not substantially alter the existing drainage pattern of the site or area, including through the alteration of the coarse of a stream or river, in a manner which would result in substantial erosion or siltation on- or off site. The project would be required to be implemented in compliance with the Construction General Permit and a SWPPP prepared by a QSD and implemented by a Qualified SWPPP Practitioner (QSP), which would ensure that construction- related impacts from erosion and siltation from the project would be less than significant. After completion of construction, the runoff conditions (flow rates and durations) would be less than pre - development runoff conditions. Thus, the project would not result in erosion or siltation onsite or offsite. Impacts would be less than significant. 5. The project would not substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a mamier which would result in flooding onsite or offsite. There are no streams or rivers in the vicinity of the project site; thus, alteration of the course of a stream or river would not occur. In addition, the SWPPP would ensure that construction - related impacts related to increases to surface runoff would be less than significant. After completion of construction, the runoff conditions (flow rates and durations) would be toss than pre - development runoff conditions. Thus, the project would not result in runoff that could substantially alter the existing drainage pattern of the site or area. Impacts would be less than significant. The project would not create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff. The SWPPP would ensure that construction - related impacts related to sources of polluted runoff would be less than significant. Auer completion of construction, the runoff conditions (flow rates and durations) would be less than pre - development runoff conditions due to the increase in pervious surfaces that would be generated from the project. In addition, runoff would be filtered through structural BMPs, which would slow drainage and remove pollutants, prior to discharge from the project site. Thus, the project would not result in runoff that would exceed the capacity of existing The Iderkage Mixad Use Preect 14 ESA / 140734 Statement rf Facts and Findings September 2015