Laserfiche WebLink
(§3.1,3.2,3.3, and 3.4) There are no on-site septic system(s). There have been no <br /> repairs/replacements of septic systems within a one-half mile radius of the subject property. This <br /> may be attributable to the indigenous sandy/silty soils at leachline and deeper depths, as evidenced <br /> by the obtained percolation test results. The only permit within the study area was for perc tests <br /> conducted on the east side of Banta Road. <br /> (§3.4� The subject property is in an area designated as "High Water Table Areas" by EHD's <br /> soil/groundwater map denoting the various soil types and septic system requirements throughout <br /> the County. However, as referenced below, the water table is deeper in this locale than it is <br /> further to the northeast where it is much shallower. EHD requirements in this area are leachlines <br /> exclusively, with an equivalent of 100 feet of leachline per bedroom. <br /> (§ 16) Since the water table is comparatively shallow in this area at approximately 15 feet <br /> (discussed in the following Section), and the fact that the shallow(42") soil characteristics are a <br /> silty, fine sand and adequate for acceptable effluent management, sumps and seepage pits cannot <br /> be considered for installation in this location. <br /> (§1/5 and 3.6) As noted above, a review of Application Permits on file at EHD reveals there <br /> have been no Applications or Permits for Repairs/Additions/Replacements to septic systems on <br /> linne Road within the study area. <br /> (§ 5A/and 6.0) SOIL PROFILE AND PERCOLATION TESTING <br /> (§ 5.4�The USDA Soil Map shows the north half of the on-site soil to consist of a Capay clay <br /> (#118) and Stomar clay loam(#252) under the south half of the property. Typically,these soil <br /> types have slow permeability according to the N.R.C.S. However, a relatively rapid permeability <br /> was confirmed by the perc test results in the soil type under the two above-referenced soil types. <br /> Sufficient soil"fines" (silt and clay particles) exist to impede rapid percolation that would occur <br /> with an extremely sandy soil. Therefore, treatment of septic effluent can take place before <br /> reaching the water table at approximately 15 feet below grade. <br /> (§ 5.2, 5:3, and 5.4) A Log of Boring using the Unified Soil Classification System (U.S.C.S.), as <br /> observed in the 42-inch deep perc test borings, is found on the EHD PERCOLATION TEST <br /> DATA SHEET. Generally, the underlying surface soils show a consistent lean clay soil with a <br /> high degree of stickiness to a depth of 2.5 ft. From this depth to 42 inches exists a fine sandy silt <br /> material. No cemented silts hardpan soil stratum was discernible at depths down to the typical <br /> leachline depth of 42 inches. <br /> (§ 6.1) Percolation testing was conducted at the site illustrated on the Tentative Map found in <br /> Appendix C. This test location maintains sufficient distance requirements between wells, <br /> property lines, irrigation lines, etc. The following information describes the preparation of the <br /> percolation test borings and the actual percolation testing: <br /> (§ &2, 6.3 and 6.5) On January 21,2015, 0900 hrs, a shallow perc test boring of 42 inches was <br /> hand-drilled near the centers of the two proposed Parcels, approximately 150 ft north of Linne <br /> Road. This distance will allow any future residence convenient utility access from Linne Road. <br /> Page -2- <br />