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9/23/91 <br /> <br />page 2, Upper Arm Picnic Park <br /> <br />Please refer to the enclosed setback list which outlines the <br />minimum separation distances between septic system components and <br />other features. Keep in mind that the drainfield lines follow the <br />natural landform contours and are constructed level form end to <br />end. The soil must not be modified within the drainfield areas by <br />cutting or filling, as the drainfields must be constructed in the <br />natural undisturbed topsoil. An effluent pump may be necessary to <br />reach the drainfield sites from the restroom building site. If <br />so, in this fairly rapidly drained soil, a hydrosplitte~ should <br />be used to ensure even distribution to each line. Saturation of <br />any one line should be avoided due to a relatively shallow <br />regional water table. Drainline trenches must be limited to 30 <br />inches deep maximum and 24 inches minimum. <br /> <br />I hope this report is adequate for your planning . If not, <br />feel free to call. I am usually in the office between 8 <br />AM. <br /> <br />LEE A. GRIMES <br />SOIL SCIENTIST <br /> <br />please <br />and 10 <br /> <br />DON WOODLEY <br />BUILDING OFFICIAL <br /> <br /> <br />