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AKA NSO.N 4NDERSO.N ASSOCIATES, lire. P.U. Sox 665 222 /Monroe Street September 15, 191 VanEeckhuut Building Corporation 15500 Wayzata Boulevard Wayzata:, Minnesota 55391 Attention: Mr. Chuck VanEeckhout Pear (shuck: professional engineers and surveyors Anak i, Mrnnesota 55303 1 612 427.5860 T1!4s report sL its our percolation testing report of ,%ugu :t 27, 1981 concerning the ed subdivision located in part of the S:gut}::.a st Cunrter Section 27 Town. 17 North Range 23 West in Hennepin County, Mirrc !got.: . Additional percol—Lon testing was performed at the ,.4 soil testing lot about 150 feet southwest of the original percolation test area (see enclosve sketch). The soil borings show friable loam surface soils overlie a re ",!in to ct-.+rye sand subsurface horizon. Clay soils occur at depth. Grot•nd cater was not encountered. However soil mottling and Flvying, indicative of periodir suii saturation, begin at 1.5, 2.0 and 2.2 feet depth at Boreholes al, ,..' anti :3, respectively. Because the Citv of Orono requires at least three (3.0) feet elevation di_cerence betw—n the bottor.. c f standard =.ail absorption tren,-'les and indications of soil iration, an alternative means cu s��.�ce ci�,c��:•tl. the mound system is recommended for this arei. Percolation rate measurementq (below) sh.w soil c-n_.tions .ire ::_r- inrtallation of the mound system (percrl.itiun rite At -'1" faster than t10 :. minutes per inch minimum rate for mounds). Soil Texture at Hole Elevation Depth Bottom of EoIe Percolation. Rate _+:r;111-4 ) P-4-la 61.0 28" Medium to coarse .,::.'. :.!, P-4-2a 81.E 2h" Mediae.: to (-parse sand : P-4-3a 79.. 280, Medium to �tuirsc and P-4-4a 79.» 24" Medium to coarse ,n'' 1'-4-5a ;.., .16" Mediur: to rt+arm ..,r.; 1'-4-6a 77. % `ledIuri tv !'oar ! t^C .h Measured pert-! -iion rates art; COMii `.t--nt w l th t':! tt f. turc, of In which the pE r +:latinn test• were rne. .'.. iahlr t, e t ; r• we l suited t- r r-.nund ronstruc t iron.