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) oPPY(N <br />SANPJOAQUIN <br />COUNTY <br />421 4.1"-• c, 1L/F(50 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, REHS <br />Steven Shih, REHS <br />Michelle Henry, REHS <br />April 7, 2022 <br />Mr. David Pinnell <br />5764 West Kingdon Road <br />Thornton, CA 95686 <br />RE: Rapid Percolation Mitigation Design & Addendum <br />8888 W. Pine Street, Thornton <br />APN: 001-200-20, SR0084897 <br />The San Joaquin County Environmental Health Department (EHD) has received and reviewed the Rapid <br />Percolation Mitigation Design dated February 21, 2022 and its addendum dated March 26, 2022 for <br />above referenced location. EHD accept the proposed septic system design and has the following <br />comments. <br />The soil sampled from the 48"- 54" depth was determined to be a silt loam through lab analysis <br />which categories to be Group B type soil. Through lab analysis, the saturated hydraulic <br />conductivity of Group B soil can be determine to be 3.6 in/hr equivalent to percolation rate of 16.7 <br />min/inch. Onsite Wastewater Treatment System Standard (OVVTS) require 8' soil separation <br />between bottom of dispersal field and groundwater for percolation rate of 16.7 min/inch. <br />Groundwater was determined to be at 10.33'. <br />In order to meet 8' soil separation between groundwater and dispersal field the 1,600-gallon <br />septic tank and rest of the system shall be installed under permit and inspection as it is depicted <br />on the Engineer designed plans dated March 25, 2022. <br />If you have any questions please contact Naseem Ahmed, Senior Registered Environmental Health <br />Specialist at nahmed@sjgov.org or at (209) 616-3018. <br />Steven Shih, REHS <br />Program Coordinator <br />CC: Chesney Consulting- P.O.Box 3794 Turlock, CA 95381 <br />1868 E. Hazelton Avenue I Stockton, California 95205 I T 209 468-3420 I F 209 464-0138 I www.sjgov.org/ehd