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Administrative Draft Environmental Impact Report Gill Medical Center Project Piping would also allow for directing treated wastewater (i.e., recycled water) to onsite landscape areas and reflecting ponds to reduce the Project's overall potable water demand.The wastewater treatment and recycled water irrigation system would be permitted and expanded by development phase as needed. 3.6.5.3 Storm Water The closest existing stormwater mainline is a 12-inch line that runs in a north-south direction on West Lane approximately one-mile (approximately 5,500 feet) south of the Project site. Due to the distance from the site, connecting to this existing facility is not feasible. Therefore, onsite stormwater retention is proposed. To determine the need for physical storm water improvements, expected storm water runoff was calculated based on state water quality requirements and related San Joaquin County improvement standards. According to Siegfried (2020), full project buildout (Phases 1 and 2) would generate the need for approximately 15-acre feet (AF) of onsite stormwater storage. Storm water runoff from impervious surfaces would be collected via drop inlets and underground piping and conveyed to onsite retention basins where it would undergo pre-treatment and be allowed to infiltrate and evaporate. Figure 3-7 shows a full buildout conceptual retention basin plan that employs multiple sized basins with 3:1 side slopes (min) occupying 9.5 acres of the Project site. [Admin Draft Note: Acreage and the 15-AF of onsite stormwater storage needs to be verified] All basins in the concept plan are located down gradient from development areas allowing for a gravity flow system. Like water and wastewater, stormwater improvements would be constructed and sized consistent with development phasing. 3.7 Project Operation 3.7.1 Employees, Customers and Deliveries The anticipated staffing by building and shift is shown in Table 3-3. As shown, the Phase 1 and Phase 2 Hospitals would operate 24 hours per day, seven days per week with 10 defined employee "shifts" and slightly reduced staffing levels during the overnight hours. The average number of employees over a 24- hour period is expected to be 50 at the Phase 1 Hospital and 450 at the Phase 2 Main Hospital.The average number of patients over a 24-hour period is expected to be 72 at the Phase 1 Hospital and 400 at the Phase 2 Main Hospital. The Phase 2 Medical Office Building would operate on a more traditional 8:00 a.m. to 5:00 p.m. Monday through Friday schedule and is expected to accommodate 100 office workers and attract approximately 384 customers Monday through Friday.The following routine daily material/supply deliveries are also expected: 2 at the Phase 1 Hospital; 12 at the Phase 2 Main Hospital; and,4 at the Phase 2 Medical Office Building. The number of onsite staff, medical building occupants, customers, and deliveries are not expected to vary significantly throughout the year. [Admin draft note: Need an employee estimate for the physical plant, and/or for water, wastewater and site maintenance functions.] Section 3.0 Project Description 3-19 October 2021