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sTANDAHD SYSTE~ CONSTRUCTION DETAIL SHEET June l, 1994 APPLICANTs SITE NUMBER: G & ~ USSELMAN 94-1911, WEST P/O T/L 1400, 1.965 ACRES. Your site has been found suitable for a STANDARD ON-SITE S~WAGE 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 1000 gallons. 2. The projected daily sewage flow for this project is calculated at 450 ~allons...ppr day. Based on soil conditions observed on this site, the disposal field will be sized at 150 lineal feet oer 150 qallons of projected daily sewage flow. A minimum of 450 linea.~ 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. 3. The disposal field shall be constructed with serial distribution with a minimum trench depth of 24 inches and a maximum trench depth of 24 inches. There must be at least .~2 inches of backfill over the top of the gravel, measured from the natural ground 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. An effluent lift pump may be necessary to construct the disposal field in the approved area and at the correct depth. 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 area on the property. SPECIAL CONDITIONS= The drainfields cannot be constructed within the concave landform of the drainage swale. The lines must be installed on straight slopes or convex surfaces and contoured to the natural landform. A pre-construction field stakeout will be necessary to establish the locations and elevations of the individual drainfield lines for both systems. Refer to the enclosed stakeout procedure and the setback list for details to complete the stakeout. Note, especially the separation distance required between the septic tank and curtain drain depending upon whether the tank is above or below the curtain drain. A list of licensed septic system installers who can assist with the stakeout is included for your convenience. Use care not to alter the natural topsoil within the drainfield areas prior to construction. THIS IS NOT A pm~TT TO INSTALL THE SEPTIC SYSTEM. DO NOT INSTA~J~ THE SYSTEM UNTIL A VALID PERMIT HAS HHEN ISS~I~D BY THIS OFFICE.