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a< <br /> LIVE OAK GEO ENVIRONMENTAL, INC. <br /> 407 W. Oak St., Lodi, CA 95240 ❖ (209)369-0375 •:• logelodi.com <br /> March 11, 2020 RECEIVED <br /> Project Number: 20-05 <br /> MAR 1120 <br /> Naseem Ahmed, REHS ENVIRONMENTAL HEALTH <br /> San Joaquin County Environmental Health Department DEPARTMENT <br /> 1868 E. Hazelton Ave. <br /> Stockton, CA 95205 <br /> Regarding: Addendum to Nitrate Loading Study <br /> Lopes Property <br /> 16520 W. Von Sosten Rd., Tracy, CA <br /> Original report dated February 27, 2020 <br /> Mr. Ahmed: <br /> I spoke with Michael Kith, Lead REHS, on March 4 regarding changes to the nitrate <br /> loading calculation. At this time, he indicated that the San Joaquin County <br /> Environmental Health Department, in consultation with Norm Hantzsche, now <br /> recommends that residential wastewater generation (per house) be calculated as 100 <br /> gallons per day (gpd) for the first bedroom and 50 gpd for each additional bedroom. <br /> As a result, we have prepared this addendum to the above Nitrate Loading Study, <br /> adjusting the calculation to utilize the new method. <br /> As indicated in the original report, the existing house has three bedrooms, and the <br /> proposed new house will have two bedrooms. Using the new method to calculate <br /> wastewater flow, the existing house contributes 200 gpd, and the new house <br /> contributes 150 gpd, for a total wastewater flow of 350 gpd. <br /> For the new calculation, all other variables have been retained as they were on the date <br /> of the original report. <br /> The inputs and results of the revised calculation are as follows: <br /> Environmental ❖ Engineering Geology Geophysics <br />