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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 µg/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 /> The laboratory analytical results are attached as Appendix 5 of this report. <br /> Soil Profile and Geologic Information <br /> The Site is mapped on the Geologic Map of the San Francisco-San Jose Quadrangle <br /> (Wagner, et. al., 1991). It is depicted within a map unit of alluvial fan deposits (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the Web Soil <br /> Survey (USDA, 2018) to be composed of Capay clay, wet (Plate 8). 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 Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map (in) Classification mmhos/cm Reaction ability absorption <br /> • Symbol pH (in/hr) fields <br /> Capay Clay, 0-20: Clay; CH, CL <4 6.6 - 8.4 0.06 - 0.2 Severe: <br /> wet, 0-2% 20-44: Clay, silty clay: CH, CL <4 6.6 - 8.4 0.06 - 0.2 peres slowly <br /> slopes, 121 44-60: Silty clay loam, clay <4 6.6 - 8.4 0.06 - 0.2 <br /> loam: CL <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 Borings <br /> On July 27 through August 10, 2018, Live Oak excavated a shallow soil boring on each <br /> of the the proposed new parcels of the Site for the purpose of conducting percolation <br /> tests. The borings were four inches in diameter, 3.20 to 3.42 feet deep, and were <br /> excavated by hand auger (Table 2). The locations of the borings are indicated on Plate <br /> 9. <br /> The soil in the borings was similar to that described by the Soil Survey. Sandy clay was <br /> encountered in each boring to the full depth of the hole. The soil logs are presented on <br /> Plates 10 through 12. <br /> LOGE 1811 Page 5 <br />