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• CONCLUSIONS AND RECOMMENDATIONS <br /> In summary, the soil conditions in the percolation test locations appear to be suitable for <br /> use with on-site septic systems. Satisfactory soil percolation rates of less than 2.4 <br /> min/in (Parcel 1) and less than 4.3 min/in (Parcel 2) were observed in the test locations. <br /> No new construction is planned for the Site. <br /> The depth of ground water based on recent aquifer levels is estimated to range between <br /> 62 to 65 feet below ground surface. The ground-water flow is to the northwest or north- <br /> northwest at a rate of approximately five to eight feet per mile. <br /> A water sample was collected from the domestic water well. Nitrate was detected at a <br /> concentration of 8.9 mg/L-N in the water sample. DBCP was detected at a <br /> concentration of 0.03 ug/!_ in the sample. The US EPA has set the Maximum <br /> Contaminant Level (MCL) for nitrate as nitrogen at 10 mg/L. It has set the MCL for <br /> DBCP 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 /> We believe the Site suitable for the use of standard septic systems utilizing leach lines <br /> • and sumps. <br /> • <br /> LOGE 1613 Page 8 <br />