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12172 N Hibbard Road Project No.2021-00063 Page 110 <br /> [Address Date Permit Comments <br /> Installation of 1 septic tank with 3 <br /> 12251 N Hibbard Road Issued 11/03/1978 Permit 78-975 leach lines and 3 seepage pits. <br /> APN:063-230-34 Issued 10/24/1989 Permit 89-2627 Installation of 1 septic tank with 2 <br /> leach lines and 2 seepage pits. <br /> Based on the file review at EHD, the septic systems in the area appear to utilize leach fields with <br /> seepage pits. From our review,the septic repairs in the vicinity appear to consist of the addition of <br /> leach lines and seepage pits.These repair permits can be found in Appendix D. <br /> 8.0 PERCOLATION TEST INFORMATION <br /> A site map indicating the location of the percolation test hole location for the parcel is included as <br /> Plate 2 in Appendix A of this report. <br /> At 12172 Hibbard Road, one shallow percolation test was placed approximately 25 feet north of the <br /> southwest parcel boundary and approximately 25 feet east of the western parcel boundary which <br /> runs parallel to Hibbard Road, within the anticipated leach field area. The shallow soil boring was <br /> advanced on the property with a 4-inch hand auger. Approximately two (2) inches of"pea gravel' <br /> was placed in the bottom of the open soil boring after the sides were scratched to remove any <br /> smeared surfaces, and then the perforated PVC pipe was installed on top of the gravel. "Pea gravel' <br /> was then used to backfill in the annular space. The test hole was pre-saturated with 12 inches of <br /> water approximately 24 hours prior to the day of testing. After the 24-hour soak period, the pre- <br /> saturated hole was found to be intact and dry on the day of testing.The final percolation rates were <br /> determined based on the EHD Percolation Test Procedure form 42-01-002,revised 8-23-2011,based <br /> on if water or no water remains in the test hole overnight,and supervised under a San Joaquin County <br /> Registered Environmental Health Specialist on June 25, 2021, at the time of the percolation test <br /> inspection. <br /> 8.1 Soil Boring Log <br /> One four-inch diameter shallow soil boring was advanced on the site down to forty-one (41) inches. <br /> The soil boring location was recorded using handheld sub meter Trimble GeoXH GPS device <br /> (38.089308°, -121.166602°W). The location of the test boring is indicated in Appendix A, Plate 2. <br /> Generally, the soil encountered in the boring was similar to the soils reported by the San Joaquin <br /> County Soil Survey for the area (USDA, 1992). The Table 6 presents the soil log for the percolation <br /> test location. <br /> Petralogix Engineering,Inc. <br /> 26675 Bruella Road,Galt,Ca 95632 <br /> (209)-40o-5729 <br /> www.petraloglx.com <br />