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Nitrogen Loading Study Report Page 6 <br /> 24754 EAST RIVER ROAD <br /> WKA No. 11306.01 <br /> January 13, 2017 <br /> Revised., March 7, 2017 <br /> compared to the MCL for nitrate as nitrogen. The results show both the high and low estimates <br /> of 2.53 mg/L and 2.07 mg/L fall below the MCL. Based on this, it is not likely that the septic <br /> systems will have significant nitrogen-related impacts to down gradient water resources. <br /> 6.0 NITROGEN LOADING RESULTS DISCUSSION <br /> The results of the mass balance show no excess nitrogen loading to groundwater when <br /> compared to the MCL. The septic system was found to be the least significant source of <br /> nitrogen loading. Storm water runoff was found to contribute more than half of the nitrogen <br /> loading at the Site. The installation of the septic system will not create a significant source of <br /> nitrogen to the area. <br /> Mitigation is not required for the current Site conditions. Any future development at the Site <br /> should utilize Best Management Practices to prevent the over-application of nitrogen. <br /> 7.0 CONCLUSIONS AND RECOMMENDATIONS <br /> WKA performed a nitrogen mass balance for the Site using a high and low estimate for the <br /> amount of nitrogen contributed from the East and South Septic Systems. The resultant high <br /> estimate concentration of total nitrogen was calculated to be 2.53 mg/L and the low estimate <br /> concentration of total nitrogen was calculated to be 2.07 mg/L. Both of these values fall below <br /> the MCL for nitrate as nitrogen of 10 mg/L. The result of the mass balance show no significant <br /> nitrogen loading from the septic systems that would impact soil or groundwater. <br /> 8.0 LIMITATIONS <br /> The statements and results presented in this report are based upon the scope of services <br /> performed as described above and data available during the writing of this report. The report was <br /> prepared in a manner consistent with the level of care and skill ordinarily exercised by <br /> Professional Geologists. Work was performed using a degree of skill consistent with that of <br /> competent environmental consulting firms performing similar work in the area. No <br /> recommendation is made as to the suitability of the property for any purpose. The result of the <br /> investigation does not preclude the possibility that materials currently, or in the future, defined as <br /> hazardous are present on the site. This report is applicable only to the investigated site and should <br /> not be used for any other site. No warranty, either expressed or implied, is provided. �`� <br />