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color of the skin, as well as headache, dizziness, weakness, and difficulty breathing. Ingestion of high levels of nitrates over time can also lead to gastric problems. 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 ug/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. Soil Profile and Geologic Information The Site is depicted on the Geologic Map of the San Francisco-San Jose Quadrangle, California (Wagner, et. al, 1991). The Site is depicted within a map unit of the Modesto formation (Plate 7). The surface and near surface soils located at the Site are reported by the USDA Web Soil Survey to be composed of Delhi loamy sand (Plate 8) (USDA, 2019). The table below presents some selected properties of this soil: Table 1. Selected Properties of On-Site Soils (USDA, 1992) Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank and Map (iReaction ability absorption Symbol n) Classification mmhos/cm pH (in/hr) fields Delhi loamy 0-16 Loamy sand; SM <2 6.1-7.8 6.0-20 Severe: sand, 0-2% 16-26 Loamy sand, loamy fine <2 6.1-7.8 6.0-20 poor filter slopes, 142 sand; SM 26-60 Sand, loamy sand, fine <2 6.1-7.8 6.0-20 sand; SP-SM, SM 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 February 18, 2019, Live Oak excavated a shallow soil boring adjacent to the existing septic disposal area of Parcel 2 of the Site for the purpose of conducting a percolation test. A second boring was excavated on Parcel 1. The borings were four inches in diameter, 3.04 and 3.06 feet deep, and were excavated by hand auger (Table 2). The locations of the borings are indicated on Plate 9. The soil in the borings was similar to that described by the Soil Survey. Silty sand was encountered to the full depth of each hole. The soil log is presented on Plate 10. LOGE 1907 Page 5