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Soil Suitability and Nitrate Loading Evaluation CTE Job# 25-0710 Great Pacific Nut-Nut Processing Facility Expansion 3501 Lehman Road Tracy, California August 1, 2019 Page 3 of 10 The proposed new warehouse building is expected to include a bathroom at the south end which will include an associated leach field south of the bathroom and north of the existing residential structure. Based on discussions with the owner, the warehouse will be used mostly to store nuts and will require a maximum of 12 employees Existing ground in the vicinity of the proposed leach field is relatively level with elevation ranging from 83 to 85 feet above msl. Information included within this report is provided for use in the design of the proposed leach field. An "Exploration Map", attached as Figure 2, shows the project configuration as well as percolation test and groundwater boring locations. 3.0 SEPTIC PERMITS AND PERFORMANCE Adjacent properties surrounding the subject site are currently in use for agricultural production. Research of existing septic permits for the properties adjacent to the subject site indicates replacement installations have occurred at APN: 255-02-062 in 1997, APN: 255-02-058 in 2015, and, APN: 255-02-044 in 1994. The system at APN: 255-02-046 was permitted in 1981 with no changes noted since that time. Our search of permits available online (https:,`,'Nktivw.sjr7ov.or,-�/department/envIleaIth/public-records) indicates the existing home on the subject project site (3501 Lehman Road) has no record of a septic or well permit and is currently vacant. 4.0 FIELD INVESTIGATION A preliminary field investigation, conducted on March 22, 2019, included site reconnaissance, mapping of surficial site deposits, and the excavation of one percolation test hole (designated "P- 1 X" in this report) to a maximum depth of 36 inches. An inspection was scheduled and percolation testing was performed on April 9, 2019 within test-hole P-IX. The percolation rate obtained from testing within P-1X resulted in a percolation rate slower than the minimum required for standard designs, therefore, San Joaquin County Environmental Health Dept (SJCEHD) was notified of the failing test and the percolation test inspection was cancelled. C&t_,INC.