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LIVE OAK GEO ENVIRONMENTAL, INC. <br /> 401 407 W. Oak St., Lodi, CA 95240 ❖ (209)369-0375 ❖ logelodi.com <br /> March 25, 2020D <br /> Project Number: 20-03 <br /> Naseem Ahmed, REHS APR 0 2 <br /> San Joaquin County Environmental Heal""" tJTAL CEN-_ <br /> 1868 E. Hazelton Ave. AN <br /> Stockton, CA 95205 <br /> Regarding: Addendum to Soil Suitability/Nitrate Loading Study <br /> S�,,Ew <br /> Contreras Property �.2_"-Z-Z <br /> 10250 N. Childress Rd., Stockton, CA <br /> Original report dated February 18, 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, Mr. Contreras stated that a two-bedroom home will <br /> be built on the Site, and a three-bedroom home is currently located on the Site. Using <br /> the new method to calculate wastewater flow, the existing house contributes 200 gpd, <br /> and the new house 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 />