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UEC Document No.: R3579901 February 8, 1999 2.0 SOIL PROFILE& PERCOLATION TEST FINDINGS A UEC Registered Professional Mechanical Engineer (Mr. Thomas J. Yalch) has conducted Soil Profile and Soil Percolation Tests on the subject parcels on December 1, 1998; additional soil profile work occurred on January 20, 1999. The latter Soil Profiling task involved digging a total of three (3) holes 8.0-10.0 feet below grade; the UEC engineering staff observed the soil physical characteristics and assessed the soils' ability to accept water. Soil Percolation Tests were performed along the north side of the South Parcel as well as along the south side of the North Parcel (see Figure 3); the Soil Percolation tests were performed in order to quantify the soils' ability to accept waste water discharge from any future septic systems to be installed on the adjusted South Parcel. 2.1 North Parcel: -19.4 Acre Lot The three (3) Soil Profile test hole locations are illustrated in Figure 2; the Soil Profile Field Sheets, prepared by the UEC engineering staff, may be found in Appendix B. In summary, the soil down to a depth of 5 feet below grade, consisted of primarily loam, with a small sand component; no clayey films or strata were observed. The soils were observed to be uniform in color (medium brown) and texture. There were a small amount of roots due to native grasses within 1 foot of the surface; all of the roots observed near the surface were small in structure (<1 mm). Soil Profile holes numbered 2 and 3 in Figure 2 contained a few stray roots between 1 and 2 feet below grade due to the close proximity of unmaintained grape vines. No rock was observed in any of the three profile holes. Due to the recent rain in the subject site area, the uppermost 1.5-2.0 feet of soil had a higher moisture content then at deeper depths; no soil was observed to be in a saturated state. Although no quantitative Soil Percolation tests were performed in or around the septic system existing to the southeast of the mobile home located on the North Parcel, visual observations of the soil physical characteristics support the conclusion that the site will readily accept a replacement septic system. Replacement areas deemed suitable for this parcel are illustrated in Figure 2. 2.2 South Parcel: --5.9 Acre Lot _ Four (4) Soil Profile test holes have been dug in order to assess 2 different possible replacement areas for the septic system existing on the adjusted South Parcel. Two of the four Soil Profile test holes were dug north of the drainage pond existing on the Calva Products Site (see Figure 3). As indicated in Figure 3, two holes were established as Soil Percolation test holes; the two Soil Percolation test holes were dug to a depth of 24 inches below grade with a backhoe, then advanced to a depth of 39 inches with a post hole digger; soil profile holes were dug — 10 feet from the Soil Percolation Test Holes. 2