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CONCLUSIONS AND RECOMMENDATIONS <br />In summary, the soil conditions examined near the existing and potential future septic <br />disposal fields on the Site were found to be suitable for standard septic systems. <br />Satisfactory soil percolation rates were observed at the test location on each proposed <br />parcel. The soils in the test locations were found to be sand/silt mixtures. <br />The depth of ground water based on recent aquifer levels is approximately 30 feet <br />below ground surface. Ground water appears to flow to the north in the general area at <br />a rate of 2.0 to 2.5 feet per mile. <br />A water sample was collected from the domestic well at 22884 Frederick Avenue as <br />part of this investigation. Nitrate was detected in the sample at a concentration of 5.5 <br />mg/L-N, well below the MCL of 10 mg/L-N. DBCP was detected in the sample at a <br />concentration of 0.053 l g/L, below the MCL of 0.2 �tg/L but above the MCLG of zero. <br />Based on the methods and assumptions described, the nitrate loading calculation <br />indicates that the use of existing and potential future septic tanks and drain field <br />systems on the Site should not cause a buildup of nitrate in the aquifer over the <br />maximum drinking water standard of 10 mg/L-N. Because of the results of the nitrate <br />loading analysis, no nitrate mitigations are recommended at this time. There are no <br />immediate plans for construction. <br />The findings for each parcel are summarized in the following table. <br />LOGE 2233 Page 18 <br />Perc. <br />Nitrate <br />Rate <br />Loading Result <br />Parcel <br />(min/in) <br />(mg/L-N) <br />Comments & Recommendations <br />Parcel 1 <br />6.25 <br />4.2 <br />No new construction anticipated. <br />Parcel <br />31.25 <br />3.3 <br />Standard septic system recommended; no restrictions <br />identified. <br />Shallow septic system (leach lines or filter bed) only; a <br />Parcel 3 <br />1.46 <br />9.2 <br />house 4 bedrooms or smaller results in predicted nitrate <br />loading under MCL. <br />Designated <br />N/A <br />0.8 <br />No new construction anticipated. <br />Remainder <br />LOGE 2233 Page 18 <br />