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10 May 2021 Project No. 21-6390 Page 9 of 14 enhanced due to natural processes within the soil. If the permeable soils exist to the depth of the groundwater table, it is possible that surface contaminants may be transported fairly rapidly. Due to the planned development, wastewater will be discharged into the disposal field area approximately 16 to 18 feet above ground surface. Wastewater will migrate to the base of the selected fill material while nitrate degradation is occurring, and then laterally to the sloped edges of the berm. 8.0. GROUNDWATER ANALYSIS The office building and project will be supplied with potable water by the proposed groundwater well to be located in the northeast corner of the project area (Figure 6). 8.1. DESCRIPTION OF LOCAL GROUNDWATER According to information obtained from the GeoTracker Web site, depth to groundwater at the site between 2011 and 2014 was approximately 11 to 12 feet bsg with a northeast flow direction. Groundwater was not encountered in the percolation test holes advanced on 21 April 2021 and 22 April 2021. 8.2. EXISTING OR POTENTIAL GROUNDWATER CONTAMINATION The immediately adjacent and outlying land use for the parcel is miscellaneous and/or agricultural. Potential groundwater contamination can occur from several sources including leaking underground storage tanks, septic systems, agricultural activities, dairies, and stormwater infiltration. A review of the DTSC EnviroStor Database and the Geotracker Web site revealed two (2) cleanup program sites within a half-mile radius of the project study area. The sites have been closed since 2017 and 2018. Based on the status of the sites and the distance and direction from the study area, the sites should not impact the project. The review did not reveal any other sites of environmental concern within a half-mile radius of the project study area. Based on the information reviewed, there is no existing or known groundwater contamination in the study area and the potential for groundwater contamination is de minimis. 8.3. CURRENT AND FUTURE USE OF GROUNDWATER AT THE SITE A groundwater well will be installed in the project area to provide potable water to the planned office building and site. The well should be installed to conform with DWR and EHD standards.