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STANDARD SYSTEM CONSTRUCTION DETAIL SHEET September 15, 1992 APPLICANT~ ELMER CHASE SITE NUMBER: 92-3084 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. The septic tank shall have a minimum liquid capacity of 1000 gallons. The projected daily sewage flow for this project is calculated at 450 ~allons Der dav. Based on soil conditions observed on this site, the disposal field will be sized at 150 line~ feet per 150 qallons 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 (il") and contoured to follow the natural ground surface. The disposal field shall be constructed with s.~rial distribution with a minimum trench depth of 24 inches and a maximum trench depth of 30 inches. There must be at least 12 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 existing lower soil test pit is dug too close to the downslope road cut and ditch. Also, too close to the proposed well. The drainfields will need to be shifted farther upslope and the well will need to be relocated or eliminated altogether and the residence serviced from an offsite water supply. Refer to the enclosed setback list which outlines minimum separation distances between components of the septic systems and other features, existing and proposed. The new lot lines must meet a ten (10) feet minimum setback from the existing adjacent drainfield and the replacement drainfield sites. A preconstruction field stakeout is recommended. Refer to the enclosed stakeout procedure to complete the stakeout. THIS IS NOT A PERMIT TO INSTALL TEE SEPTIC SYSTEM. DO NOT INSTALL THE SYSTSM UNTIL A VALID PERMIT HAS B~RM ISSUED BY THIS OFFICE.