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Soil Suitability/ Nitrate Loading Study <br /> Betschart Property Lodi, CA krracon <br /> July 19, 2019 Terracon Project No. NA197044 <br /> 2.4.2 Methods of Mitigation <br /> Based on the favorable nitrate loading results, nitrate impacts to groundwater are not anticipated; <br /> therefore, mitigation measures are unwarranted. <br /> 3.0 CONCLUSIONS AND RECOMMENDATIONS <br /> The soils encountered on the site generally consisted of clayey sand. A satisfactory percolation <br /> rate of 1.23 min/inch at 3.5 feet was obtained in the proposed leachfield. Septic systems in the <br /> site vicinity consist of septic tanks and leach lines connected to sumps and/or filter beds. <br /> Depth to groundwater is anticipated to be greater than 80 feet bgs. There is no groundwater well <br /> currently located on the site; therefore, a groundwater sample was not collected. The result of the <br /> nitrate loading balance (9.5 mg/L-N) indicates that the proposed development will not cause a <br /> buildup of nitrates in the aquifer; therefore, nitrate impacts to groundwater are not anticipated. <br /> In summary, the parcel appears suitable for the proposed development. The septic system design <br /> should 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 />