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S�P TESTING� INC,_ Steven B. Schirmers & Debra M. Schirmers <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> FAX (612) 497-5011 <br /> State License#394 <br /> June 15, 1998 <br /> Orono Woodlands, Inc. <br /> 2100 Co.Rd.6 <br /> Orono, Henn. Co., MN <br /> A site investigation was completed for the existing pressurized mound system located on <br /> this property. <br /> The existing mound system is surface discharging with the rock bed hydraulically <br /> overtoaded. The system was investigated in 1997 and was overloaded at that time from <br /> access ground and surface water entering the tanks. Since that time, the tanks have <br /> been sealed with risers installed at each tank. On 5-28-98, I completed soil borings <br /> through the mound approximately 1' from the rock bed at each end and at the curve <br /> point of the mound. The sand at the original topsoil was dry to moist at each end and <br /> moist at the curve point. The inspection pipes in the rock bed showed the rock bed to <br /> be full and overloaded. This indicates the rock bed is plugged, not allowing effluent to <br /> pass through the sand. I opened each manhole on the tanks finding no floating layer <br /> and the effluent to be gray in color. This indicates no bacterial growth in the tanks. This <br /> facility uses large amounts of chlorine bleaches, anti-bacterial soaps and antibiotics <br /> which appear to be killing the bacteria needed for an on-site sewage treatment system <br /> to work. Due to the nature of this home, the Health Department requires these products <br /> to be used. - <br /> I feel to repair this system, the problem may only be delayed and occur again. The <br /> ability to connect to the city sewer line is a possibility and is highly recommended due to <br /> the large quantities of the products required to be used in this home. A request will <br /> need to be given to the City of Orono for a possible hook up to the sewer line. <br /> �• . <br /> Steven B. Schirmers <br /> ���, ��.-� � <br /> � �is , <br /> s�,�s� � <br /> ���<.rc" �� �y r� C'..<<>�.� <br />