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Coldani Family Vineyards Winery&Olive Mill Facility Page 5 of 15 Our Project Number: NA145058 November 20,2014 5.0 SOIL CONDITIONS Visual classification of each soil stratum encountered according to ASTM D2488 (Visual — Manual Procedure) was made in the field by an engineer from our office at the time the test holes were drilled. The samples obtained were checked in the laboratory by a geotechnical engineer and classification verified according to ASTM D2487. A classification and graphical representation of each soil encountered is presented on the Log of Test Boring sheets. The test boring legend is presented on Plate No. 7. The soils encountered during our field investigation were fairly uniform between test holes. The upper soils consisted of medium dense to dense silty sands and medium dense to very dense sands that extended to a depth of 16'/2 feet below the existing ground surface (bgs). The upper soils were underlain by medium dense to dense silty sands that extended to a depth of 30 feet bgs. The silty sands were underlain by dense to very dense sand with silt and very dense silty sand to the maximum depth explored of 46'/ feet bgs. For a more detailed description of the soils encountered in the test holes see the Logs of Test Boring sheets. Test hole logs show subsurface conditions at the date and location indicated and it is not warranted that they are representative of subsurface conditions at other locations and times. Groundwater was encountered in boring B5 at a depth of approximately 23 feet below the existing ground surface at the time the boring was drilled. The test hole was not allowed to remain open for an extended period of time; therefore, the actual groundwater depth should be considered approximate. According to the California Department of Water Resources website, `Water Data Library', nearby groundwater monitoring well Station 38107ON1213806WO01 show historical groundwater levels as high as 12.5 feet from the existing ground surface. Groundwater conditions in the future could change due to rainfall, construction activities, irrigation or other factors. The evaluation of these factors is beyond the scope of this study. Due to potential fluctuation of groundwater depths and the historical groundwater data, a groundwater depth of no more than 12.5 feet should be utilized for design purposes unless a more detailed groundwater study is performed. 6.0 PERCOLATION TESTS Two percolation tests (P1 and P2), both shallow at approximately 3 feet bgs, were conducted on the project site (both within the proposed septic leach field areas). A site map indicating the locations of the percolation test holes is included as Plate 1 in Appendix B of this report. The two percolation tests were performed for soil characterization to aid in the design of two proposed on-site septic fields to be constructed at a later date. ".44 02014 Neil O.Anderson&Associates,A Terracon Company