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ci\ SANJOAQUIN <br />COUNTY <br />4111 .4°- c=1/ Greatness grows here. <br />Environmental Health Department <br />Jasjit Kang, REHS, Director <br />Muniappa Naidu, REHS, Assistant Director <br />PROGRAM COORDINATORS <br />Robert McClellon, REHS <br />Jeff Carruesco, REHS, RDI <br />Willy Ng, REHS <br />Melissa Nissim, RENS <br />Steven Shih, REHS <br />April 5, 2021 <br />Mr. Mahmoud Abarghooie (Mo Abar) <br />6783 Dublin Blvd <br />Dublin, CA 94568 <br />RE: Soil Suitability/Nitrate Loading Study <br />19960 S. San Jose Road, Tracy <br />APN 209-290-32, SR0083411 <br />The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br />Loading (SSNL) Study for the above noted location, and has the following comments for your consideration. <br />The SSNL was prepared to determine the suitability of the above noted parcel for onsite wastewater treatment <br />system (OVVTS) usage and the potential long-term impact of nitrate to groundwater for the following proposed <br />5-bedroom primary house and a 5-bedroom second unit dwelling. <br />Based on the information provided, the EHD concurs with the recommendations in the report: <br />1. The SSNL Study supports the (OVVTS) usage with the following conditions: <br />The mounded septic system shall meet all requirements from well(s), foundation and property <br />lines. <br />The mound systems are to be 200' long and 30' wide. <br />The height of mound system shall be approximately 2.75 feet higher than surrounding grade with <br />slope of not exceeding 5:1. The slope of the mound system shall be demonstrated to EHD <br />inspector. The slope of parcel should be flat and should be demonstrated to EHD inspector. <br />The filter media of the mound bed shall be sand media tested by an engineer laboratory or be a <br />certified by the san supplier before emplacement. A sieve analysis (ASTM C-33 Specification) <br />should demonstrate the sand media material must not have more than 20 % by weight of material <br />greater than 2 mm diameter and no more than 2% by weight passing the No. 200 sieve (washed <br />sand). Effective diameter should be .20mm to .30 mm with a uniformity Coefficient (D60/D10). <br />The installment of filter media shall be conducted with supervision of EHD inspector. <br />The gravel on top of mound bed shall 1/4 inch to 2.5 inch washed drain rock. The placement of <br />drain rock shall be conducted with supervision of EHD inspector. <br />The soil cover and soil cap must consist of a silt loam material to allow oxygen diffusion into the <br />mound system. <br />Construction of laterals shall conform to engineer design plan. EHD inspector shall be observe <br />lateral squirt test. <br />h. When the primary mound systems fails the only alternative for replacement area is that the <br />primary mound systems to be removed and another installed over the existing footprints with <br />same material and criteria. <br />Note: The above-mentioned requirements for mound system are major concerns that require EHD <br />extra supervision. It is the owner responsibility to ensure the mound system meets all requirements <br />mentioned in the engineer design. <br />1868 E. HazeIton Avenue I Stockton, California 95205 T 209 468-3420 I F 209 464-0138 I www.sjgov.org/ehd <br />