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Eu '.'. TO: Jeanne A. Manbusth, Building & Zoning Administrator FROM: Michael P. Gaffron, Asst. Planning & Zoning Administrator DATE: March 13, 1990 Subject: #1503 Woodhill Country Club - Subdivision - Septic Testing I have reviewed the site of the proposed building lot and would make the following comments: 1. The testing for septic system drainfield sites provided by S-P Testing indicates the use of a trench drainfield system on 2 terrace levels at the north east corner of this steeply sloped lot. The tested sites provide the capability for as much as 950 lineal feet of drainfield, enough to provide for a primary system and nearly 2 alternate systems for a 5 bedroom home. 2. Since these sites are at the high end of the lot, one would expect some under ground drainage following the contours down the hill. With 80% of the lot having slopes greater than 18%, it would be critical to avoid placing the house directly downhill from the drainfield sites. Furthermore, it would be advisable to do no grade cuts within 50' downhill from any of the drainfield sites, and within 20' laterally at a level equal to the sites. Because these slopes near the drainfield are so steep, it would seem to be within the authority of the septic code to require these special conditions on site grading. 3. To that end, I have sketched on the S P Testing design, a "protected area" in which no structure and no grading or cuts should occur. Based on the preservation of this area and the stipulation that no cuts occur, I would recommend approval of the building site, finding that the provisions of the septic code for a buildable site are adequately met.