1977-05-06 Septic System Design and Soil Testing

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B. -6 -a I.-0 aR•A&V.y, 40&aA S AMCAdO4 Inc. ems., C rmt AIP& Ono G I.E. Lamprene F. Ftldslra. I.E 11o111W. Ronne. LE. Glm R. Cook. I.E. AL A�a& a?'fs lorrlk C Agdrrllk. I.E. Kfith A. Gordon. P.E. ``A Bradford A. Lemberg. L E Thomas E. Noyes. I.E. TWO Robert D. Frlgaard, I.E. Richard W. Fojler. I.E. Richard E. Tuner, I.E- lawn C. Olson. I.E. January 23, 1978 Mr. Thomas J. Jacobs Building Inspector City of Orono P.O. Box 66 Crystal Bay, Mn. 55323 Re: Fred W. Broling, 340 Heather Lane Percolation Tests Our File No. 13J9 Dear Mr. Jacobs: 1PR3 @ R 0 W R 0 JAN, 26 I.C, M VILI..Af� r'r . r*jr jr Robin G. Sdrnkbl. I.E Ma"fn L. Somal&, I.E. Donald C. Aarprdl. LE. Kenneth R. Urines. LE Charles A. Erlckl.,, Leo N. An"IAt Harlan M. Orton We have reviewed the info•=mation regarding percolation tests and septic tank - drain field design submitted by your office and by Hickok and Associates. Following is a summary of events leading up to the present time: 1) Percolation tests taken May 2 and 3, 1977 2) Letter dated May 6, 1977 sent to Ms. Nancy Curry (Fazendln Realtors) from Hickok with results and recommendations. 3) Letter dated December 19, 1977 sent to City from McCombs recommending denial of permit because of bad percolation test results. 4) New percolation tests taken January 4 and 5, 1978 5) Letter dated January 9, 1978 sent to Fred W. Broling from Hickok with new design of system - Percolation rate - 25.1 mpi (primary) and 17.1 mpi (secondary) 6) Letter dated January 11, 1978 sent to Engineer from Building Inspector requesting review 7) Letter dated January 19, 1978 sent to City from Hickok confirming percolation results of January 4 and 5, 1978 Pursuant to your request for review of the design, we checked with Mark Hannaman of Hickok as to why there was such a difference between the May 1977 tests and the January 1978 tests. His first responses was that the tests were taken in different locations on the lot. However, after checking in the field, the two sets of tests were indeed located fairly close together. Wc, therefore, requested that the tests be re -run. It was intended that a representative of the City to present during the re -testing. Apparently, because of schedule conflicts, no one from the City was present during the re -testing. Mr. Hannaman certifies in his January 19, 1978 letter to the City that the re -testing confirms the second set of data. Based on the percolation rates resulting from the January 4-5 test and confirmed by the January 18 re -test, we recommend approval of the septic tank -drain field design submitted by Hickok. A summary of the Hickok design criteria is presented herewith: Page 1.