Laserfiche WebLink
Soil Suitability/ Nitrate Loading Study Irerracon <br /> Souza Property Tracy, CA <br /> February 28, 2020 Terracon Project No. NA207011 <br /> Depth to groundwater is anticipated to be greater than 80 feet bgs. A domestic groundwater well <br /> is not currently located on the site; therefore, groundwater samples were not collected. <br /> Based on the nitrate loading balance, nitrate levels for the existing residence is 18.2, above the <br /> MCL of 10.0 mg/L-N. The proposed second residence is anticipated to add 16.3 mg/L-N further <br /> increasing nitrate levels 34.5 mg/L-N, also above the MCL . <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. 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 17 <br />