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syndrome, which results in reduced oxygen supply to vital tissues. Pregnant women <br />and certain others can also develop methemoglobinemia. Symptoms include a bluish <br />color of the skin, as well as headache, dizziness, weakness, and difficulty breathing. <br />Ingestion of high levels of nitrates over time can also lead to gastric problems. <br />DBCP is a nematocide and soil fumigant for vegetables and grapes. It is known to <br />cause male reproductive effects and is classified as a probable human carcinogen. <br />Most domestic use of DBCP was discontinued in 1977 through 1979. The US EPA set <br />the MCL at 0.2 parts per billion (ppb, equivalent to ug/L) because it believes that given <br />present technology and resources, this is the lowest level to which water systems can <br />reasonably be required to remove this contaminant should it occur in drinking water. <br />The Maximum Contaminant Level Goal (MCLG) for DBCP is zero. <br />Soil Profile and Geoloaic Information <br />The Site is depicted on the Geologic map of the San Francisco -San Jose quadrangle, <br />California (Wagner et. al, 1991). The Site is depicted within a map unit of the Modesto <br />formation (Plate 8). <br />The surface and near surface soils located at the Site are reported by the USDA Web <br />Soil Survey to be composed of Galt clay (Plate 9) (USDA, 2022). The table below <br />presents some selected properties of this soil: <br />Table 1. Selected Properties of On -Site Soils (USDA, 1992) <br />Soil Name <br />Depth <br />Unified Soil <br />Salinity <br />Soil <br />Perme- <br />Septic tank <br />and Map <br />(in) <br />Classification <br />mmhos/cm <br />Reaction <br />ability <br />absorption <br />Symbol <br />pH <br />(in/hr) <br />fields <br />Galt clay, <br />0-25 <br />Clay; CL, CH <br /><2 <br />6.6-7.3 <br />0.06-0.2 <br />Severe: <br />0-2% <br />25-34 <br />Clay, silty clay; CL, CH <br /><2 <br />6.6-8.4 <br />0.06-0.2 <br />cemented <br />slopes, 160 <br />34-60 <br />Cemented <br />--- <br />--- <br />--- <br />pan, peres <br />slowly. <br />Note: The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for <br />composition and behavior characteristics of the map unit. <br />Soil Boring <br />On February 24, 2022, Live Oak excavated a shallow soil boring near the proposed <br />septic disposal area of the Site for the purpose of conducting a percolation test. The <br />boring was four inches in diameter, 2.87 feet deep, and was excavated by hand auger <br />(Table 2). <br />The location of the boring is indicated on Plate 10. <br />LOGE 2211 Page 5 <br />