2004-P08100 - new septic system - Laserfiche WebLink

Home Browse Search

S-P TESTING, INC. Steven B. Schirmers - MPCA Cert.No. 627 951 Katydid Lane NE - St. Michael, MN 55376 - (612) 497-3566 FAX (612)-497-5011 State License#394 A 3, Zoo 4- �s November 9, 1999 Tom Baurle 2985 Watertown Rd. Orono, Henn. Co., MN This site has an existing mound system which is surface discharging septic effluent at the rock bed. Soil borings through the mound found the sand fill to be moist but not saturated. The sand fill below the rock bed is a loamy sand, clean washed medium sand is required for mound construction. A quart jar test was completed finding 1-1/8" of sediment over the 2" of sand in the jar, 1/8 of sediment is allowed for mound fill sand. To adequately treat septic effluent, a new mound system will need to be installed. Surface discharging is classified as an imminent health hazard which must be repaired or disconnected within 10 months or the City's required period, whichever is less. This on-site sewage treatment system is designed for a Type 1, three bedroom home, in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The soils on this site are SCS soils mapped - LrB - Lester loam. The seasonally saturated soils were located at 16" to 20" (mottled soil). Due to the seasonally saturated soils, a Pressurized Mound System will need to be installed to treat septic effluent. The bottom of the treatment area must be located at least 3' above the saturated soils. The soils at a depth of 12" have a percolation rate of 4.9 mpi. The top of the tanks are approximately 6' to 6-1/2' deep. Due to the depth of the tanks, ground water infiltration may also be part of the failure for this system. The tanks will need to be inspected and certified as water tight. If the tanks are not water tight, new -tanks will need to be installed. The tanks will also need to be verified they meet the 50' setback from the existing well. 1