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Soil Suitability and Nitrate Loading Evaluation Page 3 U of P-Golf Practice Facility Expansion 6301 West Eight Mile Road Stockton, California May 13, 2019 CTE Job # 25-0711G 4.0 SEPTIC PERMITS AND PERFORMANCE Adjacent properties surrounding the subject site are currently in use for agricultural and residential purposes. A search of existing septic permits for adjacent properties resulted in several existing septic permits on file for this property, no problems were indicated.-7 5.0 FIELD INVESTIGATIONS o The field investigation was conducted on April 24, 2019 and May 9, 2019 and include�Z,-- geologic reconnaissance, a geological boring, and a _ est boring. The borings were drilled (to maximum depth of approximate) _5.0 feet sing 4.0-inch diameter solid stem-auger. Groundwater observations were made during and after completion. Groundwater was encountered at approximatel .2 feet b --- Soils were logged using the Unified Soil Classification System including consistency, color, texture, and gradation, on the bases of excavation resistance and observation of cuttings. Location of the test borings are shown on attached Figure 2, "Site Map." The soil log describing encountered earth materials is included in Appendix C. All soil borings were backfilled upon completion. 6.0 GROUNDWATER Groundwater was encountered at approximately 10.2 feet bgs within of our boring. Water level data in the vicinity (Well #380571N1213745W001 located approximately 0.6 miles southeast of the site) indicates groundwater to be 5.5 to 19.3 feet below ground surface as measured between 1981 and 2004. 7.0 SOIL PROFILE Published (USDA, Soil Survey of San Joaquin County, California, dated mapping indicates soils at the site consist of alluvial soils classified a Guard clay" loam. These soils are described as shallow, drained, on 0-2 percent slopes soi rims o -basin floors. Published geologic mapping--"Geologic Map of the Sacramento Quadrangle" (CDMG Map Sheet 1A, 1981) indicates the site to be underlain by Quaternary Modesto Formation Upper Member alluvium deposits (Qml). Our assessment indicates the site to be generally underlain by soils considered consistent with those shown on published mapping as described above. Soils encountwithin the dep%elow of exploration for this project are described as medium dense-41ty--sin M ,`1.5 feeground surface fbg clay#6 to an approximate depth of 5 fbgs, underlain by pledium dense silty fine sand (SM)�o the maximum depth r approximately 15.0 fbgs. �- 8.0 PERCOLATION TESTING,,/ The test hole (P-1) was excavated bn May 9, 2019 at/near the existing leach field area as shown on attached Figure 2. The percolation test was performed in general conformance