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Soil Suitability /Nitrate Loading Study Irerracon <br />Munsch Property ■ Lodi, California <br />January 7, 2022 m Terracon Project No. NA217092 <br />2.3.6 Impact of Nitrate Loading to Nearby Water Sources <br />There are no nearby surface water sources that would impact the percolating effluent. <br />2.4 Discussion of Nitrate Loading Results <br />2.4.1 Total Nitrate Impact <br />Based on the method and assumptions described, the result of the nitrate loading balance indicate <br />that the proposed development is anticipated to be below the MCL. <br />2.4.2 Methods of Mitigation <br />Nitrate mitigation measures appear unwarranted. <br />3.0 CONCLUSIONS AND RECOMMENDATIONS <br />Three percolation tests (P1-3', P2-3.5' and P3-8.0') were conducted in the vicinity of the proposed <br />septic system located at 16133 N Moore Road (APN 027-020-16). The soils encountered in the <br />percolation test borings consisted primarily of silty sand throughout. The shallow percolation tests <br />(P1-3' and P2-3.5') demonstrated satisfactory percolation rates of 27.7 minutes per inch, and 50 <br />minutes per inch, respectively. The deep boring (P3-8.0') also demonstrated a satisfactory <br />percolation test rate of 6.58 minutes per inch. <br />The maximum daily flow rate for the proposed 3 -bedroom residence is 420 gpd. The proposed 2 - <br />bedroom second residence is 280 gpd. <br />A groundwater sample was not collected as there are no groundwater wells currently located on <br />the site and groundwater was not encountered in our percolation test borings. <br />Based on the nitrate loading balance, nitrate levels for the proposed 3 -bedroom residence is <br />anticipated to increase nitrate levels for the site to 6.6 mg/L-N, below the MCL of 10 mg/L-N. The <br />proposed 2 -bedroom second residence is anticipated to further increase nitrate levels to 9.7 mg/L- <br />N also below the MCL. The result of the nitrate loading balance indicates that the development <br />is not anticipated to increase nitrate levels above the MCL therefore nitrate mitigation is not <br />recommended. <br />In summary, the parcel appears suitable for the proposed development. The septic system design <br />should accommodate peak flows and follow the San Joaquin County OWTS standards where <br />applicable. <br />Responsive ■ Resourceful ■ Reliable 17 <br />