05-26-1998 Council Packet - Laserfiche WebLink

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n TO:Michael P.Gaffron, Senior Planning Coordinator FROM: Stephen Weckman, On-Site Systems Manager DATE: April 8,1998 SUBJECT: Septic Review for Application #2355, Susan and Douglas Van Moorlehem Subdivision The proposed four lot subdivision requires the use of on-site sewage treatment systems. Soil borings and percolation tests were performed by S-P Testing, Inc. to identily primary and alternate drainfield sites on each lot. The existing three bedroom residence on lot 1, block 1 requires two future drainfield sites for the subdivision as the existing system is non-compliant. The existing system must be repaired by December 31, 2007 or within 90 days of failure, whichever comes first. The proposed primary site is located just down slope of the driveway and excavated soils and is designed for the existing three bedroom residence. Additional area is available for a total of five bedrooms, but the system would be seven feet from the driveway and the upslope side of the system would lie over excavated soils. If a five bedroom system Is installed in this location the driveway would need to be moved to provide adequate drainage around the system. The future drainfield site meets all current codes. Because the proposed primary drainfield site for this lot has some limitations, staff notes that another future site appears to be avaUable just east of the future site, but at slightly steeper slopes (between 6 and 8 percent). Staff considers this to be a better alternative than using a site across Watertown Rd. The remaining lots have primary and alternate drainfield sites designed for five bedroom residences wliich meet all current standards. No setback, drainage or other site problems appear to be a concern on these lots. Based on the above information, staff recommends approval of the subdivision. The City requires the drainfield sites be fenced off prior to any grading or land alteration on these lots. ----