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Soil Suitability / Nitrate Loading Study 1rerracon <br />Ehlers Property Lodi, California <br />May 13, 2021 Terracon Project No. NA217019 <br />nitrate levels to 4.2 mg/L-N, which is also below the MCL. Based on the nitrate loading results, <br />mitigation measures appear unwarranted. <br />In summary, the parcel appears suitable for the proposed land use. The client should be aware <br />elevated nitrates were identified in the onsite domestic well. The septic system design should <br />accommodate peak flows and follow the San Joaquin County OWTS standards where applicable. <br />4.0 LIMITATIONS <br />As indicated, our study takes into account the subject property only with the sewage load applied <br />over the property site area. The study does not take into account surrounding properties and/or <br />lands. The method utilized for the nitrate loading analysis is based on a simple mass balance <br />formula, discussed in a published article by Hantzsche and Finnemore (1992), which provides a <br />convenient and simplified method to estimate long-term groundwater nitrate impacts on an area - <br />wide basis. A more detailed analysis was not requested nor intended. <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 />Responsive Resourceful Reliable 17 <br />