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February 6, 1995 APPLICANT: SITE NUMBER: STANDARD SYSTEM CONSTHUCTION DETAIL SNEET PARTITION GLORIA JOHNSON 94-4605, WEST pART OF T/L:500. 2.5 OF 5 ACRES. PARCEL Your site has been found suitable for a STAiTDAP/) ON-SITE SEWAGE DISPOSAL SYSTEM, The following consDructi0n specifications shall apply to the installa- tion of your septic system, The septic tank shall have a minimum liquid capacity of 1000 gallons. The projected daily sewage flow for this project is calculated at ~B0 qallons per day. Based on soil conditions observed on this site, the disposal field will be sized at lB0 lineal feet per 150 qalloR~, of projected daily sewage flow, A minimum of 450 lineal feet of disposal field will be required for your propose~ 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 (il") and contoured to follow the natural ground surface. 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 12 i~ches 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 (!2) inches wide by 48 inches deep with 42 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 15 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 area on the property. SPECIA~ CO~rDITIONS: The original, standard drainfield must be constructed within the immediate area of the northeasterly test pit. A pre-construction field stakeout will be necessary to establish the elevations and locations of the individual drain~ield lines and the location of the curtain drain. Refer to the stakeout procedure and the setback list for details to complete the stakeout_ A list of installers who can assist with the stakeout is included for your convenience. The sand filter drainfield site is just above the standard drainfield. It too, needs the protection of an upslope curtain drain, well construction must be deferred, pending review and approval of the pre-construction field stakeout, soil con- ditions are marginal for standard system consideration. Use care not to alter the natural topsoil prior to drainfield construction. Drainfield installation should be limited to the dry soil, summer season_ THIS IS MOT A PER~{IT TO INSTALL T~E SEPTIC SYSTEM. DO NOT INSTALL THE SYSTEM UNTIL A VALID PERMIT ~AS BEEN ISSUED BY THIS OFFICE.