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12172 N Hibbard Road Project No.2021-00063 Page 19 <br /> 7.2 Expected Maximum Septic Tank Usage for Site <br /> Expected maximum septic tank usage for the Site is to accommodate the current three-bedroom, <br /> single-family residence and the proposed three-bedroom,two-bath,accessory dwelling-unit. <br /> 7.3 General Area Septic Tank Usage,Permit,and Repair History <br /> In an attempt to determine the septic system density for the vicinity of the site,our office reviewed a <br /> recent aerial photograph available from GoogleEarthTM. We counted the clusters within <br /> approximately one square mile of the site,with the assumption each building cluster has one septic <br /> system. Using this method, we determined there are approximately 90 septic systems per square <br /> mile in the immediate vicinity of the site.This is a low number of septic systems,with the majority of <br /> these systems located within a rural residential subdivision. <br /> The EHD septic permit files were obtained from the San Joaquin Environmental Health Department <br /> (EHD) Online EHD Program Records6 in an effort to obtain copies of permits for any septic tanks <br /> located within the general area of the subject property. <br /> Copies of the septic search permits for surrounding parcels have been included in Appendix D of this <br /> report.The records are summarized in the following table: <br /> Table S. <br /> Neighborhood Site Sewage Disposal System Permits <br /> E <br /> dress Date Permit Comments <br /> 12156 N Hibbard Road Issued 03/21/2007 Installation Permit New installation of a septic tank, 2 <br /> APN:063-230-43 SR0050052 leach lines,and 2 seepage pits. <br /> Issued 08/11/1971 Installation Permit 71-742 New installation of a septic tank, 2 <br /> 12254 N Hibbard Road leach lines,and 2 seepage pits. <br /> APN:063-230-15 Issued 10/20/1981 Repair Permit 81 685 Seepage pit repair. <br /> Issued 09/28/1998 Repair Permit SR0017651 <br /> Seepage pit repair. <br /> 12104 N Hibbard Road Issued 07/06/1972 Permit 72-699 Repair/Addition of 1 leach line and <br /> 1 seepage pit. <br /> APN:063-230-13 Issued 03/22/1991 Permit 91-0645 <br /> Septic tank repair. <br /> Septic system replacement with <br /> 12131 N Hibbard Road Issued 10/30/1978 Permit 78-949 leach lines and seepage pits. <br /> APN:063-230-35 Issued 05/28/1991 Permit 91-1266 Repair/addition of one leach line <br /> and seepage pit. <br /> 6 https://lfweb.sjgov.org/WebLink/Browse.aspx?dbid=1&tcr=1 accessed September 9, 2019 <br /> Petralogix Engineering,InC. - <br /> 26675 BruelIa Road,Galt,Ca 95632 <br /> (209)-40o-5729 <br /> www.petralogix.com <br />