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02 March 2023 AdvancedGeo Project No. 23-7124 An Employee-Owned Company Page 6 of 14 Valley Regional Water Quality Control Board concurred that the site meets the conditions of the LTCP and requested a draft deed notification with a soil management plan by letter dated 08 February 2022. • The Former Suprema Cheese Wastewater Pond was drained and excavated in 2001 when the facility went out of business. Elevated levels of chloride persist in groundwater from the pond. • The San Joaquin Sharpe Defense Depot is located approximately 1,000 feet west of the subject property. The Defense Depot consists of several open and closed environmental investigation and remediation projects. Based on the information reviewed, there is the potential for groundwater contamination at the site. However, based on the surrounding land use, the proposed development and planned site use, it is AGI's opinion that impact from nearby sites is de minimis. 4.3. ON-SITE EXISTING WELL DESCRIPTION One record is on file at EHD for installation of an irrigation well at 1000 E. Roth Road in April 1977, permit number 77-354. Based on the permit construction specifications, the well was composed of 16-inch diameter steel casing in a 24-inch diameter borehole. No grout was used in the construction of the well. AGI is unaware if the well is still in operation. A copy of the well permit is included in Appendix C. Potable water will be provided to the subject property by the City of Lathrop. 5.0. SOIL PROFILE An OWTS Permit was issued for the property by the EHD on 04 March 2019 to perform a percolation test (Appendix C). On 18 April 2019, a 4-inch diameter hand auger was utilized to advance a percolation test hole to 36 inches bsg, in the proposed septic system disposal field area (Figure 2). The percolation test was performed by Shannon & Wilson, Inc. A plan of the specific site features including the percolation test hole location (i.e., structures, drives, wells, septic systems, large trees, pastures, pools, natural drainage courses, ponds, waterways, etc.) is illustrated in Figure 2. 5.1. SOIL LITHOLOGY AS RELATED TO FUTURE ONSITE SEPTIC USES The soil was visually described in accordance with the Unified Soil Classification System (USCS) by a representative of Shannon & Wilson, Inc. under the supervision of a California Professional Geologist. The soil collected from the percolation test hole boring consisted of dry, poorly graded sand with silt from surface grade to 36 inches bsg. The