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p"'N GZ <br /> ° SAN. OAQUIN Environmental Health Department <br /> COUNTY Kasey Foley, REHS, Interim Director <br /> A <br /> cg41F6aGreatness grows here. PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> Willy Ng,REHS <br /> Muniappa Naidu, REHS <br /> Michael Kith,REHS <br /> Melissa Nissim, REHS <br /> January 27, 2020 <br /> Kusalakari Corporation <br /> 9698 S. Priest Road <br /> French Camp, CA 95231 <br /> RE: Soil Suitability/Nitrate Loading Study and Addendum <br /> 9698 S. Priest Rd, French Camp <br /> APN 193-220-15, SR0081180 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading Study (SSNL) dated September 4, 2019 and its addendum dated November 20, 2019 for the above <br /> noted location and has the following comments for your consideration. <br /> The SSNL Study was prepared to determine the suitability of the above noted location for onsite wastewater <br /> treatment system (OWTS) usage and the potential impact of nitrate to groundwater for existing residence and <br /> the proposed development project. The proposed development project includes Monastery/Meditation <br /> Retreat Center and functions that will generate 1,041.00 gallons of waste water per day from the following <br /> activities: <br /> a. Wastewater generated from 2 volunteers daily. <br /> b. Wastewater generated from 3 bedroom residence daily. <br /> c. Wastewater generated from 10 congregants on weekdays and 40 congregants on weekends (no <br /> kitchen use). <br /> d. Wastewater generated from 185 congregants with kitchen use 4 times per year. <br /> e. Wastewater generated from 47 retreat guests with overnight stay 65 days per year. <br /> f. Wastewater generated from 2 visitors 65 days per year. <br /> The estimated nitrate loading from the existing and proposed usage shows a potential for nitrate impact to <br /> groundwater above water quality objectives. According to SSNL Study, the estimated nitrate loading from this <br /> existing and proposed OWTS usage is 14.47 mg/L-N. In addition, the onsite water well already shows an <br /> elevated Nitrate-Nitrogen level of 22.6 mg/I. The drinking water standard for Nitrate-Nitrogen is 10.0 mg/I. <br /> Based on the information provided, the EHD can make the following findings: <br /> 1. The SSNL Study supports the suitability for OWTS usage with the following conditions: <br /> a) The potential impact of the Nitrate to groundwater shall be mitigated. OWTS shall utilize <br /> supplemental treatment and meet performance requirements in Section 10.9 of Regional <br /> Water Quality Control Boards OWTS Policy (Boards Policy). <br /> b) A Registered Civil Engineer shall submit complete engineered design plan to EHD for approval <br /> prior to issuance of building permit. Fee will be based on the current fee schedule at time of <br /> payment. <br /> c) The two percolation tests conducted at the site indicate the soil percolate wastewater at rate <br /> of 2.38 and 2.19 minute per inch. This rate requires a 20 foot separation between bottom of <br /> dispersal system and ground water. Historical data show ground water to be at 14 feet in 1983 <br /> and 23 in 1993. <br /> d) Annual permit is required. Fee for annual operating permit is due at time of OWTS permit <br /> application. <br /> 1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd <br />