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City of San Leandro 880 Doolittle Drive Industrial Project ES-12 Impact Mitigation Measure (s) Residual Impact for onsite reuse, if applicable; and 3) Contaminated Soil: Staining and odor indicators present, and/or photoionization detector measurements of more than 50 ppmv. These soils shall be further evaluated and are likely to be characterized for offsite disposal.  If soil exhibiting evidence of contamination (e.g., visual and odor indicators, and photoionization detector measurements of more than 50 ppmv), is encountered during ground disturbing activities, the project applicant and/or General Contractor shall cease ground disturbing activities in the area and delineate the area with barricades or fencing, stakes and plastic sheeting as appropriate, and signage to notify onsite workers and visitors of access restrictions. The General Contractor shall notify the Property Owner and Environmental Consultant. Upon notification, the Environmental Consultant shall implement and/or provide oversight.  Stormwater pollution controls shall be implemented by the project applicant and/or General Contractor to minimize sediment runoff in stormwater. Best Management Practices including grading the site and installing stormwater control measures such as temporary earth berms or erecting silt fences around the perimeter of exposed soil at the site, shall be implemented to prevent erosion and sediment runoff from the site. Straw bale barriers or sediment traps shall be required to protect any existing catch basins or drainage channels.  During project construction activities, soil and/or groundwater sampling, removal and management of discovered underground structures (e.g., storage tanks), chemical analysis and proper disposal of contaminated materials, and soil import activities shall be documented in a daily field log by the project applicant and/or General Contractor and/or Environmental Consultant. At the completion of the construction activities, a Construction Completion Report shall be prepared by the Environmental Consultant for submittal to DTSC that summarizes the soil and groundwater handling activities. The DTSC shall continue to be utilized for agency oversight of assessment and remediation of the project site through completion of construction activities. In addition to implementing the Revised Soil and Groundwater Management Plan, prior to commencement of construction and grading activities at the project site, the project applicant shall implement and/or complete the following tasks, and other tasks if requested by DTSC, regarding the open Site Cleanup Program Case:  Implement the November 19, 2020 Redevelopment- Related Groundwater Monitoring Well Network Modification Work Plan, as approved by DTSC on May 26, 2021