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Soil Suitability / Nitrate Loading Study r ierracon <br /> FLAG CITY TRUCK AND EQUIPMENT PARKING FACILITY I Lodi, California <br /> October 6, 2023 1 Terracon Project No. NA237081 <br /> Groundwater was not collected because no wells were located on site and groundwater <br /> wan not encountered during Terracon's field work. <br /> The total maximum daily flow rate for The Truck Parking Facility is 375 gpd. <br /> Based on the nitrate loading balance, nitrate levels for the proposed development are <br /> anticipated to increase nitrate levels up to 3.1 mg/L-N which is below the MCL of 10 <br /> mg/L-N. The result of the nitrate loading balance indicates that the future development <br /> is not anticipated to increase nitrate levels above the MCL; therefore, nitrate mitigation <br /> appears unwarranted. <br /> In summary, the parcel appears suitable for the proposed development. The septic <br /> system design should accommodate peak flows and follow the San Joaquin County <br /> OWTS standards where applicable. <br /> 4.LIMITATIONS <br /> As indicated, our study takes into account the subject property only with the sewage <br /> load applied over the property site area. The study does not take into account <br /> surrounding properties and/or lands. The method utilized for the nitrate loading analysis <br /> is based on a simple mass balance formula, discussed in a published article by <br /> Hantzsche and Finnemore (1992), which provides a convenient and simplified method to <br /> estimate long-term groundwater nitrate impacts on an area-wide basis. A more detailed <br /> analysis was not requested nor intended. <br /> Our professional services were performed, our findings obtained, and our conclusions <br /> proposed in accordance with generally accepted engineering principles and practices. <br /> This warranty is in lieu of all other warranties either expressed or implied. Test findings <br /> and statements of professional opinion do not constitute a guarantee or warranty, <br /> expressed or implied. <br /> Facilities I Environmental I Geotechnical I Materials 19 <br />