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Y - , �-P TESTING, INC. Steven B. Schirmers • MPCA Cert.No. 627 <br /> . -r-�, <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> FAX (612) 497-5011 <br /> State License #394 <br /> Revised October 6, 1997 <br /> September 26, 1997 <br /> �"���',�`•4�``.. <br /> - ��; oa �99� <br /> � ����� <br /> Pam Sagan f ��p�oNO <br /> 1300 French Creek Drive � <br /> Orono, Henn. Co., MN <br /> This site has an existing on-site sewage treatment system consisting of 2-1000 gallon <br /> holding tanks & 1-1000 gallon pumping chamber. The drainfield is 900sq.ft. with 300 <br /> lin.ft. of trench. Approximatety 20 lin.ft. of the trench is below the driveway. The original <br /> design required 280 lin.ft. At present the system is hydraulically overloaded and is <br /> surface discharging which is an imminent health hazard and must be repaired or <br /> disconnected within 10 months. The home has an iron filter which discharges <br /> approximately 600 gallons every 2 days which will be diverted out of the system. A <br /> water meter was installed which does not include the iron filter or water softner. <br /> Readings from 9-13-97 to 9-20-97 show water use from 210 to 490 gal/day. An event <br /> counter was also installed at the lift station. The pump is pumping approximately 225 <br /> gal/cycle, a check valve was installed to prevent drainback, this will need to be removed <br /> before the winter months to prevent freezing. On 9-15-97 & 9-16-97 the discharge to <br /> the system was 900 & 1125 gallons plus with the remainder of the week at 225 to 450 <br /> gal/day. On 9-15-97 & 9-16-97, approximately 1" to 3" of rain had fallen. This indicates <br /> ground water is entering the system through the tanks or possible drain tile from the <br /> house foundation. The tanks will need to be inspected for leaking & repaired and the <br /> drain tile checked. Once this is completed with the water use reduced in the home, low <br /> flush toilets, shower heads, etc. the system may recover. If the system does not recover <br /> and surface discharge reoccurs, the system will need to be added to by using 10" <br /> diameter gravelless trench between the existing trenches & downslope of the existing <br /> trenches using a sizing factor of 1.27sq.ft./gallon, the new system would support 750 <br /> gal/day (960sq.ft.) <br /> The soils on this site are SCS soils mapped -An6 -Anoka loamy fine sand. No <br /> seasonally saturated soils were present. The bottom of the treatment area must be <br /> located at least 3' above the seasonally saturated soils. <br /> 1 <br />