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• DBCP is a nematocide and soil fumigant for vegetables and grapes. It is known to cause male reproductive effects and is classified as a probable human carcinogen. Most domestic use of DBCP was discontinued in 1977 through 1979. The US EPA set the MCL at 0.2 parts per billion (ppb, equivalent to µg/L) because it believes that given present technology and resources, this is the lowest level to which water systems can reasonably be required to remove this contaminant should it occur in drinking water. The Maximum Contaminant Level Goal (MCLG) for DBCP is zero. The laboratory analytical results are attached as Appendix 5 of this report. Soil Profile and Geologic Information The Site is mapped on the Geologic Map of California: San Jose sheet (Rogers, 1966). It is depicted on the border between map units of dune sand and the Modesto formation (Plate 7). The surface and near surface soils located at the Site are reported by the Web Soil Survey (USDA, 2017) to be composed of Tinnin loamy coarse sand and Veritas fine sandy loam (Plate 8). The table below presents some selected properties of these soils: Table 1. Selected Properties of On-Site Soils (USDA, 1992) • Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank and Map (in) Classification mmhos/cm Reaction ability absorption Symbol pH (in/hr) fields Tinnin 0-28: Loamy coarse sand; SM <2 6.1-7.8 6.0-20 Severe: loamy 28-53: Loamy coarse sand, <2 6.1-7.8 6.0-20 poor filter coarse loamy sand; SM sand, 0-2% 53-75: Loamy coarse sand, <2 6.6-8.4 6.0-20 slopes, 255. loamy sand, sand, SM Veritas fine 0-15: Fine sandy loam; SM, <4 7.4-8.4 2.0-6.0 Moderate: sandy loam, 15-54: SC-SM <4 7.4-8.4 2.0-6.0 flooding, 0-2% Sandy loam, fine sandy cemented slopes, loam; SM, SC-SM pan 266 54-70: Cemented Note:The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for composition and behavior characteristics of the map unit. Soil Borings On July 12, 2017, Live Oak excavated a shallow soil boring on each proposed parcel of the Site for the purpose of conducting percolation tests. The borings were four inches in diameter, 3.45 and 3.33 feet deep, and were excavated by hand auger (Table 2). The locations of the borings are indicated on Plate 9. • LOGE 1718 Page 5