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A review of Application Permits on file with the Environmental Health Department reveals there have been nine Applications for Repairs/Additions to septic systems in the surrounding one-half mile study area. This can be considered a high number of Repairs/Additions and can be attributed to the old, surrounding housing that has existed for several decades. These Repairs/Additions are also for replacement of redwood tanks that were once installed for these houses. For example, in 1983,the house at 10243 Small Road had a concrete septic tank installed. Ten years later, 100 feet of leachline was installed. Ms. Prouty's family has lived in the house on the subject property since 1924. Approximately 20 years ago,the original redwood septic tank was replaced with a concrete tank, along with replacement of the original leachlines. This was done under permit according to Ms. Prouty, however, a permit for this replacement could not be located at EHD. She has not had a problem with her septic system since the time of this replacement. The subject property is in an area designated as"Sand/Sandy"by EHD. Therefore, since the water table is comparatively shallow in this area, seepage pits are not allowed to be installed, and sumps are discouraged due to increasing nitrate impact potential. As discussed below, the water table_is approximately at 27 ft below grade. There are no known tile drains under the property. SOIL PROFILE AND PERCOLATION TESTING P/ The USDA Soil Map shows the northeast corner of the property consists of a Veritas fine sandy loam (#266) soil type and the remaining acreage is a Honcut sandy loam (#175). Typically, these soil types are well drained with moderate permeability, which is a beneficial soil attribute for septic effluent management. There are sufficient soil"fines"to impede percolation so treatment of effluent can occur before reaching the water table, unlike what would be encountered with a very sandy soil. v' A Log of Boring designating the Unified Soil Classification System(USCS) soil classifications as observed from the hand-drilled percolation test borings are found on the EHD PERCOLATION TEST DATA SHEET. Generally,the soils are relatively uniform in physical characteristics, as was observed. Surface soils change color from dark brown to light brown at approximately 36 inches below ground surface(b.g.s.). The Uniform Soil Classification System classifies this soil as SM- a sandy silt/silty sand. The soil has a low organic matter content and very high moisture content. Percolation testing was conducted on Parcel 2 in the location designated by Mr. Kearsey, as illustrated on the attached schematic illustrating the location of his proposed house. The following information describes the preparation of the percolation test borings and the actual perc testing: On March 7, 1330 hours, one perc test boring was hand-drilled on proposed Parcels 1 and 2, to a depth of 40 inches and 4.5 inches in diameter. The sidewalls of the borings were scored with a pry-bar and the loose material removed. Two inches of fine gravel was placed at the bottom and three-inch perforated PVC pipe was inserted. Although the soil was very wet from the heavy rainfall this winter and from recent rains, the test borings were still pre-saturated with approximately 12 inches of water. i Pa2e-2- Chesney Consulting