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L � (§ 1.1 End 2.1) The property is located between the towns of Manteca and Escalon, one-half milI north of Highway 120. Predominate land use is peach orchard production. Surrounding property consists of agricultural production land, very low density single family residences, horse ranches, other types of ag buildings. The property is zoned AG-40. Municipal sewer will probably never serve this area, or at least not for several decades. Any of the above land use could create environmental concerns that may be discovered in the future. As depicted on the attached USGS Map and the Tentative Map,the topography of the site is approximately 75 feet above MSL, with a very slight land declination toward the northwest. Therefore, septic system design criteria for slopes do not have to be considered. (§3.1,3.2, 3.3 and 3.4) The on-site septic systems referenced had been functioning properly without any problems since they were installed in 1974 and 1985. Recently, however, the residential structure system had to be replaced because of root intrusion into the leachlines. The Tentative Map for the project illustrates the septic systems on the subject property. (§ 3.4) The property is in an area designated as "Sand/Sandy"by EHD's denoting the various soil types and septic system requirements throughout the County. (§ 5.4) Therefore, since the water table is relatively deep under the property at approximately 55 feet, leachlines and sumps (not seepage pits) are allowed to be installed in this area. (§3.5 and 3.6) A review of Application Permits on file with the Environmental Health Department reveals that the only Applications for Repairs/Additions to septic systems on Louise Avenue was for the Vander Beek residence. No permits were found for Wagner Road(nearest cross street). This permit is found in Appendix D and indicates a connection to the existing system. (§ 5.4) One permit can be considered a low number of Repairs/Additions/Replacements, and can be attributed to the indigenous silty/sandy soil type. Consequently,the majority of effluent volume is managed by leachlines and possibly sumps in this area. (§ 5.1 and 6.0) SOIL PROFILE AND PERCOLATION TESTING (§5.1) The Tentative Map in Appendix C shows the location of the perc test and soil profile boring. As noted on the USDA Soil Survey map, the entire on-site soils consist of Veritas fine sandy loam (#266). Typically, these soil types are well-drained with moderate permeability in depths down to 60 inches. Hardpan may be encountered in this soil in various locations. (§ 5.2 and 5.3) A Log of Boring designated by the Unified Soil Classification System(USCS) as observed from the perc test boring, is found on the EHD PERCOLATION TEST DATA SHEET. Generally, the soils show uniformity from an organic surface layer, underlain by a silty fine sand, dark brown soil. It is known that clay strata may exist in this locale. The perc test result for Parcel 1 is indicative of a silty fine sand soil. (§6.1) As referenced, percolation testing was conducted on Parcel 1 exclusively, as illustrated on the Tentative Map found in Appendix C. The perc test location for Parcel 1 was between the existing residential structure and the north property line, which was 150 feet from the sampled, Parcel I well. Page -2- Chesney Consulting