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(§4.2) Any of the above land uses, or surrounding land uses could create environmental concerns that maybe discovered in the future. As evidenced by the testing of the on-site domestic well, and the ag irrigation well, groundwater nitrate concentrations are extremely low, indicating that agricultural inputs have not affected the underlying aquifers in this locale. This is discussed on Page 5 of this report. As depicted on the attached USGS Map, the topography of the site is approximately 70 feet above MSL, with a very slight declination toward the north since the ag irrigation well is at the southern end of the property. Therefore, septic system design criteria for slopes do not have to be considered. (§ 3.1,3.2,3.3, and 3.4) The septic systems that serve the residential structures of the Designated 3 I� Remainder have been functioning properly without any problems since they were built in 1990. A permit for the original system on this Parcel was found in the EHD files (Permit No. 90-1129). (§ 3.4) The subject property is in an area designated as "Clay Soils"by EHD's map denoting the various soil types and septic system requirements throughout the County. (§ 5.4) Therefore, since the water table is deep in this area at approximately 95 feet, and the fact that the shallow soil structure is inadequate for proper effluent management, seepage pits are allowed to be installed in this area, and almost always are. (§3.5 and 3.6) A review of Application Permits on microfiche file at EHD reveals there have been no Applications for Repairs/Additions/Replacements to septic systems on Tokay Colony J) Road exclusively. (§ 5.4) This can be considered a low number of Repairs/Additions/ Replacements and may be attributed to the low density housing in this locale. Permits that were found in the microfiche files have been included in Appendix D. These include a new installation septic permit, two well permits, and a Well Completion Report. The perc test results for the property indicate that effluent management may be a problem. These test results are much more indicative of potential problems than reviewing surrounding Application Permits,particularly since the microfiche files can be unreliable. Because the perc test results indicate potential effluent management problems, Mike Huggins, Program Coordinator for Unit 11 was consulted for EHD requirements under this situation. This will be discussed in the Conclusions Section of this Study. (§ 5.1 and 6.0) SOIL PROFILE AND PERCOLATION TESTING (§ 5.4) The USDA Soil Map shows the on-site soil to consist of a Jacktone clay(#180) and a small portion of the northeastern edge of the property is Hollenbeck silty clay(#173). Typically, the Jacktone soil is poorly drained with slow permeability, while the Hollenbeck soil type is well- drained with moderately rapid permeability. Sufficient soil "fines" exist in these two soils to impede very rapid percolation. Therefore, treatment of septic effluent can take place before ?� reacTi ng the water table. As discussed below, only the shallow perc test for Parcel 2 had acceptable percolation, while all three deep perc tests had acceptable percolation. Page -2- Chesney Consulting