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Spanos Property - Page 6 <br /> Our Project Number: LGS090501 <br /> January 30, 2009 <br /> 4.0 DISCUSSION OF NITRATE LOADING RESULTS <br /> .1 Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading balance <br /> indicates that the proposed development on the proposed parcel may cause a build up of <br /> nitrates in the aquifer above 10 mg/L-N. <br /> /4.2 *Methods of Mitigation <br /> The prediction of nitrate impact may be more thoroughly addressed when the specific use is <br /> proposed for the site. A project that raises the Nc value above 10 mg/L-N may require a small <br /> to large waste water treatment system to reduce-nitrate to or below 10 mg/L-N in percolating <br /> effluent. An engineered septic system designed.to mitigate.elevated nitrate levels may be <br /> required by the EHD. We can provide these design services upon request. <br /> /5.0 ' CONCLUSIONS AND RECOMMENDATIONS <br /> In summary, percolation rates that meet the minimum EHD standards were achieved in the <br /> shallow soils on Site. <br /> Based on the method and assumptions described, the result of the nitrate loading balance <br /> indicates that the proposed development on the property may cause a build up of nitrates in <br /> the aquifer above 10 mg/L-N. An -en-aline-ered-septic. s stem designed to mitigate elevated <br /> nitrate levels may be required by the EHD. If the project varies significantly from the proposed <br /> p eendevelopment, the prediction of nitrate impact may be more thoroughly addressed when <br /> the specific use is proposed for the site. <br /> 5.1 Attachments <br /> All required attachments and appendices follow this letter. <br /> 6.0 LIMITATIONS <br /> Our professional services were performed, our findings obtained; and our conclusions proposed <br /> in accordance with generally accepted engineering principles and practices. This warranty is in <br /> lieu of all other warranties either expressed or_ implied. Test findings and statements of <br /> professional opinion do not constitute a guarantee or warranty, expressed or implied. <br /> I <br /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02007 Neil O.Anderson&Associates,Inc <br />