Hydrology and Water Quality. In addition, before and during construction, the project may disturb more than one acre at or near the MPDCP site, which would impact Hydrology and Water Quality. Mitigation measures for Hydrology and Water Quality, the Applicant shall implement the SWPPP and complete flood proofing will reduce impacts to hydrology.
Hydrology and Water Quality. The Project will have less than significant impact with mitigation on Hydrology and Water Quality. The land at or near the proposed MPDCP site have been previously graded and leveled for agricultural use, and no major grading or earth-moving activities would occur. Before and during construction, the project would disturb more than one acre, the awardee will be required to obtain a General Construction Activity Storm Water Permit from the State Water Resources Control Board (SWRCB) for storm water discharges associated with construction activities. Applicant is required to execute a stormwater pollution prevention plan (SWPPP). Implementation of the Mitigation Measure HYD-1 of the MMRP would reduce impacts of Water Quality to less than significant. The project site is located within a Flood Zone, following construction of the biogas upgrading facility but prior to plant operations, applicant will implement Mitigation Measure HYD-2, to reduce potential impacts of Hydrology to less than significant.
Hydrology and Water Quality. As stated above, the Project site is mostly covered in impervious surfaces with paved surface parking lots and buildings. Therefore, the demolition of the existing buildings and the construction of new buildings would likely result in minimal changes to impervious surfaces and would have less-than-significant impacts on stormwater runoff quality or quantity, flooding, or drainage. The analysis will consider how the change in building footprints and impervious surfaces compare to existing conditions would potentially affect peak flow rates. It is expected that the same hydrology impacts as analyzed in the ConnectMenlo EIR would occur. To analyze impacts specific to the Project site, ICF will review technical information received from the Project Sponsor, such as hydrology or drainage reports.
Hydrology and Water Quality. Issues
1. Approach and Work Program construction. The analysis will also consider how discharges from the site enter Xxxxxx Creek since discharges can cause local scour and erosion issues affecting stream geomorphology if not designed appropriately. Mitigation measures will be identified for any significant impacts, as necessary, especially considering the close proximity to Xxxxxx Creek. Storm water pollution from surface-borne contaminants such as oils, fuels, dust, and metals would be a concern for the proposed Project; polluted storm water can degrade water quality in Xxxxxx Creek and eventually San Pablo Bay. In addition, temporary water quality degradation could be an issue during construction of the proposed Project, particularly for a Project overlying a shallow water table. Temporary and operational water quality issues in this area may be complicated by the effects of existing groundwater contamination, if significant. Significant earthwork activities would be required to comply with the existing NPDES permit and discharge permit requirements. Conduct data review of site hydrologic conditions using published reports and maps available from sources including the hydrology study, a geotechnical report (if available), a Phase I and II Environmental report (if available), and FEMA. ESA will evaluate conditions to determine areas of special concern and potential constraints. (No additional hydrologic field work is included in this scope of work.) Identify the regulatory agencies such as FEMA, Marin County Stormwater Pollution Prevention Program and RWQCB, that may have jurisdiction over the proposed Project. Evaluate storm water quality control management strategies and hydrology conditions reported in the hydrology study completed for the site to manage storm water flowing off the proposed areas. ESA will also review Project construction techniques that may be required to avoid short-term, construction-related water quality impacts. Identify potentially significant impacts. Depending on the results of the impact analysis, identify appropriate mitigation measures to reduce or avoid significant impacts, and determine the level of significance after mitigation.
Hydrology and Water Quality. Mitigation Measure CSM-HYD-2: Design and maintain hydromodification features as postconstruction measures at the College of San Mateo SAMPLE
Hydrology and Water Quality. Mitigation Measure SC-HYD-2: Design and maintain hydromodification features as postconstruction measures at the Skyline College
Hydrology and Water Quality. Potentially Significant Impact Less than Significant with Mitigation Incorporated Less than significant Impact No Impact Would the project:
Hydrology and Water Quality. PDF-HYDRO-1: LOW IMPACT DEVELOPMENT PLAN Prior to final design of the Adjacent Property Full-Size Terminal Option, Southwest Quadrant Full-Size Terminal Option, or Southwest Quadrant Same-Size Terminal Option, a Low Impact Development Plan would be developed by the Authority and submitted to the City of Burbank Community Development Director for approval. The LID Plan is required because the During design Authority replacement terminal project is classified as a “Planning Priority Project” per the BMC and must comply with requirements of Section 9-3-413. The adjacent property and southwest quadrant sites will result in an alteration to 50-percent or more of the impervious surfaces of a previously existing development which was not subject to post-construction storm water quality control requirements. Therefore, all storm water runoff generated at these two locations must be treated. At the northeast quadrant site, less than 50-percent of the impervious surfaces of a previous development not subject to post-construction storm water quality control requirements will be altered. Therefore, only the area that is altered must be treated. The LID Plan would be designed to control pollutants, pollutant loads, and runoff volumes to the maximum extent feasible by minimizing impervious surface areas and controlling runoff from impervious surfaces through infiltration, evapotranspiration, bioretention and/or rainfall harvest and use. The LID plan will detail how the project will comply with retaining storm water runoff onsite for the storm water quality design volume (SWQDv) and minimizing hydromodification impacts to the natural drainage systems. If 100-percent onsite retention of the SWQDv is technically infeasible, partially or fully, the infeasibility will be demonstrated in the LID Plan submitted for approval. Technically infeasible reasons could include; xxxxxxxxxx development sites or other locations where pollutant mobilization is a document concern, smart growth and infill or redevelopment locations where the density and/or nature of the project would create significant difficulty for compliance with the on-site volume retention requirements. If partial or complete onsite retention is technically infeasible, the project site may biofilter 1.5 times the portion of the remaining SWQDv that is not reliably retained onsite or alternatively off-site infiltration may be available. The remaining SWQDv that cannot be retained or biofiltered on- or off-site must be t...
Hydrology and Water Quality. The proposed Agreement will not have any impact on water quality, and will not change the impacts identified in Contra Costa County’s CEQA documents.
Hydrology and Water Quality. Update existing setting data and citations, including existing water quality concerns.
