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Soil Suitability/ Nitrate Loading Study 1rerracon <br /> Whitlow Property Stockton, CA <br /> November 20, 2019 Terracon Project No. NA197078 <br /> of 10 mg/L-N. DBCP (0.016 ug/L) was reported below the MCL of 0.20 ug/L. The result of the <br /> nitrate loading balance (15.9 mg/L-N) indicates that the proposed development may cause a <br /> buildup of nitrates in the aquifer above the MCL. <br /> In summary,the parcel appears suitable for the proposed development. The septic system design <br /> should accommodate the peak flows and follow the San Joaquin County OWTS standards where <br /> applicable. If the EHD requires mitigation for the project, an advanced water treatment product <br /> may be considered a mitigation option. <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 />