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Soil Suitability /Nitrate Loading Study Irerracon <br />JPM ® Lathrop, California <br />May 24, 2022 n Terracon Project No. NA227026 <br />the nitrate loading balance indicates that the future development is not anticipated to increase <br />nitrate levels above the MCL; therefore, nitrate mitigation appears unwarranted. <br />In summary, the parcel appears suitable for the proposed development; however, based on the <br />rapid percolation rates, shallow depth to groundwater encountered during field activities, and the <br />EHD required 20 -foot separation between the bottom of the dispersal field and groundwater, <br />Terracon recommends an engineered septic system for the development. The septic system <br />design should accommodate peak flows and follow the San Joaquin County OWTS standards <br />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 19 <br />