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September 15, APPLICANT: SITE NUMBER: STANI~a_~D SYSTEM CONSTRUCTION DETAIL 1992 EL~R CHASE 92-3038 Your site has been found suitable for a STANDARD ON-SITE SEWAGE DISPOSAL SYSTEM. The following construction specifications shall apply to the installa- tion of your septic system. 1. The septic tank shall have a minimum liquid capacity of 100~ gallons. The projected daily sewage flow for this project is calculated at 450 gallops per daY- Based on soil conditions observed on this site, the disposal field will be sized at 150 ii. Deal feet per 150 qallon~ of projected daily sewage flow. A minimum Of 450 lineal feet of disposal field will be required for your proposed develop- ment. The disposal trenches are constructed two (2) feet wide and on minimum ten (10) foot centers and with no line exceeding 125 feet in length. The trenches and perforated pipe are installed level (~1") and contoured to follow the natural ground surface. The disposal field shall be constructed with serial distribution with a minimum trench depth of 2~ inche~ and a maximum trench depth of 26 inc.bes. There must be at least 12 inches of backfill over the top of the gravel, measured from the natural ground surface. A groundwater interceptor is required as part of this system. This interceptor trench must be constructed a minimum twelve (12) inches wide by 42 inches deep with 36 inches of clean gravel placed over a four (4) inch smooth wall perforated pipe. The interceptor must be located at least ten (10) feet upslope from the disposal field and must discharge through a watertight, non- perforated pipe beside or below the disposal field. A separation of 25 feet is required from the septic tank if the tank is located upslope of the groundwa- ter interceptor. This approval is site specific to the area tested and the septic system must be located in the immediate area of the test pits unless otherwise autho- rized by this office. A new site evaluation may be required if the system is proposed for a different ares on the property. SPECIAL CONDITIONS: The proposed house excavation and footing drains must not conflict with the minimum setback/separation distance from the existing upslope drainfield and drainfield replacement sites. Refer to the enclosed setback list which outlines minimum separation distances between components of septic systems and other features, existing and proposed. Note especially the setback from the downslope road out and ditch. The well might need to be relocated from the current proposed site. THIS IS NOT A RERMIT TO INSTAL~ THE SEPTIC EYSTEM, DO NO~ INSTALL THE SYSTEM UN~IL A VALID pERMIT HAS BEEN ISSUED BY THIS OFFICE.