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10 September 2020 AdvancedGeo Project No. 20-6095 AnFmpfoy"-Owned Company Page 12 of 15 P 22'IV 9.3. CURRENT ON-SITE SOURCES OF NITRATE Septic systems, rainfall and agriculture are sources of nitrates (fertilizers) present on or around the property. The current site usage includes a 1,343-square foot house with four bedrooms. Residential use includes showering/bathing, clothes washing, cooking, and hand washing. The reasonable or maximum usage of wastewater for the four-bedroom house is 100 gpd for the first bedroom and 50 gpd for each additional bedroom for a total of 250 gpd. The total nitrate-nitrogen (NO3_N) average concentrations in domestic waste ranges between 20 to 85 milligram total nitrogen liter (mg/1-N)with an average of 45 mg/1-N when washing and sanitation is considered. The weighted average calculation for total nitrogen concentrations for onsite residential flow is proposed as the following: • Residential volume 250 gpd. • Home use concentration 45 mg/1-N (EHD standard). • The flow concentration of 11,250 mg/1-N gallon. 9.4. FUTURE ON-SITE SOURCES OF NITRATE The future site usage includes the addition of a small residence with two bedrooms for residential use. Residential use includes showering/bathing, clothes washing, cooking, and hand washing. The reasonable or maximum usage of wastewater for the two- bedroom home is 100 gpd for the first bedroom and 50 gpd for each additional bedroom for a total of 150 gpd. The total nitrate-nitrogen (NO3_N) average concentrations in domestic waste ranges between 20 to 85 mg/1-N with an average of 45 mg/1-N when washing and sanitation is considered. The weighted average calculation for total nitrogen concentrations for onsite residential flow is proposed as the following: • Residential volume 150 gpd. • Home use concentration 45 mg/1-N (EHD standard). • The flow concentration of 6,750 mg/1-N gallon.