2003-P06672 - new septic - Laserfiche WebLink

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� �� . S-� TESTING� �NC. Steven B. Schirmers • MPCA Cert.No. 627 951 Katydid Lane NE • St. Michael, MN 55376 • (763) 497-3566 FAX (763) 497-5011 State License #394 July 30, 2003 Joe Deckman 2943 Farview Lane Orono, Henn. Co., MN A Compliance Inspection was completed for the existing on-site sewage treatment system located on this property due to surface discharging of septic effluent (failing) which started in 2002. The system is a pressurized mound which was built in 1996. Soil borings through the sand found no ponding below the rock bed. The mound was installed properly and is not the cause of failure. The water treatment system in the home consists of a water softner & an Iron Filter with chlorine treatment added to the system. There were several empty gallon containers of chlorine bleach near the Iron Filter. This amount of bleach being added and discharging into the mound will kill the bacteria needed in the tanks &the rockbed for proper treatment to occur. The solids witl build up faster in the tanks & the solids accumulate in the rock bed due to no bacteria to consume the solids. There was no odor present at the discharge point which also indicates dead bacteria. Once a system becomes toxic it remains toxic for 72 hours. By receiving chlorine bleach during each recharge of the water treatment system, the tanks 8� mound remain toxic and no treatment will occur. Iron Filters are also known to have large amounts of water discharge using up the daily design capacity of the system. The Iron Filter must be removed from the mound system. The recharge - discharge must be directed to a surFace discharge point west of the house or into it's own drainfield system, recommend a minimum of 400sq.ft. of rock trench or seepage bed with an overtlow discharge pipe if hydraulic overload would occur. The pressurized mound system will need to have the rockbed and approximately 6" of sand removed. SB#3 found the original soil at elev. 94.1 & 94.3 in SB#4 at the upslope corner of the existing rock bed. A minimum of 12" of washed sand is required below the rock bed using SB#4 elev. 94.3. The 10' x 62' rock bed will be placed at elev.95.3 and then replace the distribution pipe, sandy loam cap & topsoil. Removal & replacement of the new materials must be completed with a backhoe from the upslope side of the mound to prevent compaction. ��-�3,��-- Steven B. Schirmers