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! <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> In summary, the soil conditions examined near the location of the septic system drain <br /> field appear to be suitable. A satisfactory soil percolation rate of 35.7 minutes per inch <br /> was observed for the shallow soil zone and 17.2 minutes per inch for the deeper soil <br /> zone. <br /> The depth of ground water based on recent aquifer levels is relatively deep and <br /> approximately 55 to 59 feet below the ground surface. The ground-water flow direction <br /> is to the north at a rate of seven to ten feet per mile in the vicinity of the Site. <br /> The on-site domestic water well was tested for nitrate and DBCP. Preliminary results <br /> indicate the nitrate concentration of ground water is 28.7 mg/L-NO3, and the DBCP <br /> concentration is 0.05 µg/L. Results of an additional well water test will be forwarded <br /> once they are received from the laboratory. <br /> i <br /> The use of on-site septic tanks and drain field systems on the Site is not expected to <br /> cause a buildup of nitrate in the aquifer above 5.84 mg/L-N, which is well below the US <br /> EPA drinking water recommendation of 10 mg/L-N. In fact, the actual impact to the <br /> aquifer will be much less since the equation is conservative and overestimates impacts. <br /> We believe the Site suitable for development with the use of standard septic systems. <br /> We do not anticipate that the ground water quality will be negatively impacted, primarily <br /> due to the low calculated nitrate level. No nitrate mitigation is recommended. <br /> LOGE1016 Page 14 <br />