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O�t. 12. 2012 10 : 16RM No, 0962 P, 2 S•P TESTING� ��C. Sfieven B. Schirmers • MPCA Cert.No. 627 951 Katydid Lane NE • St. Michael, MN 55376 • (763) 497-3566 n�, FAX (763) 497-5011 V�(% State License#394 � October 2, 24'12 � � � < �, f MeliSsa Murphy melissamurphy(c�edinarealty.com � 259U Countryside Dr. Orono, Henn. Co., MN �O � A Compliance lnspection was completed for the existing on-site sewage treatment system ioceted on this property. The system consists of 2-1600 gallon septic tanks, 1- 1600 gallon pumping chamber&a pressurized mound system with a 10' x 7'0' ro�k bed.. built ir� 1987 for a 5 bedroom home. Soil boring #1 found mottled (redox features) at 3.5' below the.ground surface. Soil boring #3 found the original soil at elev.111.3 & the bottom of the rock bed at elev.113.5 leaving 2.2' of sand below the rock'bed �a 5,T �r separafiion from the bottom of the rock bed & redox features. Soil boring#2 found mottl�d soil at 1.5' below the g�ound surface. Soil boring #4 found the original soil at elev.112.3 8�the bottam of the rock bed at elev.113.4 leaving 1.1' of sand below the rock bed 8� a 2.6' separation from the bottom of the rock bed & redox fe�tures. The system meets the required separation from the bottom af the rock bed &redox features. At the time of the inspection, efflunt was ponding in the rock bed & very near surface discharging, wet at the surFace. The system is classified as an imminent threat to public health &safety 8�will need to be upgraded within 10 months or as determined by the City of Orono. The tanks were opened which found the tanks dead, bacteria not living. The effluent in the pump tank was a gray milky color indiceting the bacteria is not living. The cause of this is from large amounts of disinfectar�ts, anti-bacte�ial soaps, etc. which will cause the rock bed to plug. A jar test was completed on the sand used to build the mound which found 3/8"to 1/2" of sediment, only 1/8" is allowed & is not classified as clean sand which could also be part of the cause of the faP�ure. It may be possible to remove the rock bed & sand & rebuild the mound. A design would need #o be completed prior to the work being completed. The cost for the design would be$550.00 with a credit of$100.00 from the compliance = $450.00. If the mound cannot be rebuilt, the cost fior a new mound design will be $650.00. The credit for the compliance will be for checking the existing mound ta see if it can be rebuilt. Steven B. Schirmers 1