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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 Geologic Information <br /> The Site is depicted on the Preliminary Geologic Map of the Lodi 30' x 60' Quadrangle, <br /> California (Dawson, 2009). The Site is depicted within map units of undivided alluvium, <br /> Riverbank formation upper unit, and Riverbank formation middle unit (Plate 11). <br /> The surface and near surface soils located at the Site are reported by the USDA Web <br /> Soil Survey to be composed of Bruella sandy loam, Hicksville loam, Exeter sandy loam, <br /> and San Joaquin loam, and San Joaquin complex (Plate 12) (USDA, 2019). The table <br /> below presents some selected properties of this soil. <br /> Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm pH (in/hr) fields <br /> Bruella sandy 0-18: Sandy loam; SC-SM, <2 6.1-7.3 2.0-6.0 Severe: <br /> loam, 0-2 % SM peres slowly <br /> slopes, 111 18-31: Sandy clay loam, sandy <2 6.1-7.3 0.2-0.6 <br /> loam; SC <br /> 31-67: Sandy clay loam, clay <2 6.1-7.3 0.2-0.6 <br /> loam; SC, CL <br /> Exeter sandy 0-26: Sandy loam; SM, SC- <2 6.1-7.3 0.6-2.0 Severe: <br /> loam, 0-2% SM cemented <br /> slopes, 157 26-33: Sandy clay loam, clay <2 6.6-7.8 0.6-2.0 pan, peres <br /> loam, loam; CL, SC slowly <br /> 33-60: Indurated --- --- --- <br /> Hicksville 0-15: Loam; CL-ML, ML <2 5.6-6.5 0.6-2.0 Severe: <br /> loam, 0-2% 15-36: Clay loam, sandy clay <2 6.1-7.8 0.2-0.6 flooding, <br /> slopes, loam; CL, SC peres slowly <br /> 170 36-60: Sandy clay loam, sandy <2 6.6-7.8 0.6-2.0 <br /> loam; SC-SM, SM <br /> LOGE 1943 Page 6 <br />