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7 7 - 2 2 3 <br />Mr. Randy Fredrickson -3- <br />May 27, 1977 <br />Basel on a percolation rate of 25 mpi, City requirements <br />would necessitate installation of 240 lineal feet of 30-inch <br />wide absorption trenches. An acceptable disposal system <br />cotLsisting of 5 lines, 60 feet in length, or 6 lines, 50 <br />feet in length with 7-foot center to center spacing would be <br />adequate. Our recommended design is as shown on the attached <br />sketch. 'the existing drainfield will be abandoned. <br />CENERAL : <br />It' we can be of further assistance in evaluating these data, <br />kindly contact us at your convenience. <br />Very truly yours, <br />ON ENGIINAEERING TESTING, IN( . <br />Dennis M. Rietschel <br />'-,Lnvim&!-iien Assistant <br />6-Braun, P.E. <br />sident <br />DMR/JSB:skf <br />cc: McCombs - Knutson <br />City of Orono <br />*0 somw »..­ 4,.. w M �. M•e....r wn � .MM s. •0. <br />so wM .0 **,1 *n 6.4..0" — ^mil ..W 4. w .nr .Mnr Wa... e,, I-" w I - f -00 1 <br />I <br />BRAUfli <br />ENGINEERING TESTING <br />