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R <br /> "S-P TESTING, INC. Steven B. Schirmers • MPCA Cert.No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (763) 497-3566 <br /> FAX (763)-497-5011 <br /> State License#394 <br /> July 13, 2002 CITY Cly ') 2r NO <br /> SEPTIC EWVIIT P ANREVIEW <br /> W <br /> INSPECTOR <br /> DATPO-ZZ-OZ- PERMIT NO._ - <br /> APPROVED AS SCBMITTED <br /> Mike Dyer APPROVED WITH CORRECTIONS AS NOTED <br /> 4115 Watertown Rd. E] NOT APPROVED-CORRECT&RESUBMIT <br /> Shwa comments W for your information. All work shall be done <br /> Orono, Henn. Co., MN h►EAI compliance with all applicable septic and zoning code. <br /> Requitements including items not specifically noted in this review. <br /> Kw T=PLAN SST ON SITE AT ALL TIMES <br /> This site has an existing pressurized mound system which is hydraulically overloaded <br /> in the rock bed and is surface discharging. The system is classified as an imminent <br /> health hazard which must be repaired or disconnected within 10 months. <br /> Soil probing into the sand found no ponding. The downslope toe of the mound was <br /> only 10' to 12' downslope from the rock bed. With the 6% slope below the system a <br /> minimum of 24' downslope toe is needed. Soil borings through the mound found <br /> original soil at elev.97.5 & 98.0 below the rock bed. The bottom of the rock was found <br /> at elev.98.2. This leaves very little sand below the rock bed. The proposal is to <br /> remove the topsoil & rock bed to the downslope toe and roughen up the remaining <br /> sand & original soil &the original 14' east & 12' west being added. Add additional soil <br /> to elev.99.9 and replace with a 10' x 50' rockbed for a 4 bedroom home. Replace the <br /> sand loam cap & 6" of topsoil. Use a large backhoe with tracks with no travel on the <br /> existing mound. <br /> The system is located where run off ponds at the uplsope toe & east end of the mound. <br /> A 6" to 12" deep diversion must be shaped at the east end of the mound to divert run <br /> off. An Interceptor drain must be installed 10' from the upslope toe of the mound a <br /> minimum of 3' deep & backfill with rock within 6" of the ground surface and the <br /> remaining 6" fill with topsoil. The tile line must be wrapped with filter cloth. <br /> Prior to repairing the system, the effluent must be pumped for several weeks to dry up <br /> the system (pumping chamber must be turned off). <br /> 1 <br />