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HomeMy WebLinkAbout1977-05-16 Septic System Design ReportAn Expansion of Soil Engineering Services, Inc. MINNEAPOLIS/BT. PAUL MS. County Rd. 1 /, P.O. Belt 35108. MpIs., Mo. 55435 / 112•f41.51IN NORTHERN MINNESOTA 3211E.1fMAwnoe, Hibbing, Mn.5574f /21f-213-f1N ' May 16, 1977 BRAUR'" ENGINEERING TESTING J. 5. $RAU%F. E., hmidenr F. X. AN OE RSON, Via- Ir-c opririom C. 0. NRUSE F. E.. Viw Pr-c F*nowin/ ' Nitz, Inc. 1989 Fagerness Point Road ' Wayzata, Minnesota 55391 Re: 77-199 SOIL BORING & PERCOLATION TESTS ' Lot 4, Block 2 Farview Addition Orono, Minnesota ' Gentlemen: As requested, we have recently conducted a soils investiga- tion consisting of one pow( auger boring and 8 percolation tests taken to determine V, general soil and groundwater conditions, as well as to 2rovide information relative to ' the soil absorptivity rates. The boring and percolation tests were taken at the locations as directed by you and as shown on the attached sketch. Field locations were refer- enced to the proposed house location. Surface elevations were interpolated from the topographic site plan which had been provided for our use previously. ' With the exception of percolation test P-5, all of the tests resulted in percolation rates above the recommended limits. You, therefore, indicated that additional percolation tests I' be performed. Based on the results of the soil boring, it was then rcommended by us that the additional percolation tests be conducted further to the southwest of the proposed ' drainfi d are These additional tests were then conducted on May 7/ and (8,,` 1977, at locations as indicated on the attache sketch-. ' INVESTIGATION METHODS: The power auger Loring was completed using a CME-45 truck ' mounted power auger unit. The soil classifications and depths, as shown on the attached log, were inferred from the soils brought to the surface by the continuous flight feature of the auger. The depth of strata changes are, thus, considered ' somewhat approximate. ' CONSULTING ENGINEERS/SOILS AND MATERIALS Fist Sonngs - Foundation Engineering and Recommendations - Inspection of Construction - Material Testing of Sods Concrete and Budding Components 77-199 Nitz, Inc. -2- May 16, 1977 Mineral soils encountered in the borings were classified in accordance with the Unified Classification System (ASTM D2487). A copy of that chart is attached. Representative samples of the soils brought to the surface by the auger will be retained in this office for a period of 60 days to be available for your examination. Percolation tests were run in 6-inch diameter holes, drilled to a depth of 36 inches, in accordance with procedures recommended by the City of Orono. The holes were permitted to soak overnight before conducting the tests. The boring was probed immediately after completion, as well as approximately 24 hours later, to check for the presence of groundwater. RESULTS: The log of soils encountered in the boring and the water level observations are shown on the attached Log of Boring sheet. The boring generally encountered a sandy, clay glacial till from the surface to the 11-foot :depth where it then encoun- tered a slightly silty, coarse alluvium sand to the 20-foot termination depth. In probing the boring immediately after completion, ground- water was not encountered. Approximately 24 hours later, the bore hole was probed and again groundwater was not encountered. Even though groundwater levels at the present time may not be normal it is our opinion that the water table in the area of the proposed drainfield is somewhat below the 20-foot termination depth of the boring. Percolation tests indicated soil absorptivity in minutes per inch (mpi) as follows: Surface Soil At Rate Test # Elevation Test Depth (mpi) P-1 974.8 Sandy Clay 120, P-2 974.7 Sandy Clay W P-3 974.0 Sandy Clay 100, P-4 974.0 Sandy Clay 120. P-5 973.5 Sandy Clay 55 P-6 973.5 Sandy Clay 120' The average of the 6 initial percolation tests is then 100 mpi. BRAUR' ENGINEERING TESTING 77-199 Nitz, Inc. -3- May 16, 1977 Subsequent percolation tests on May 17 and 18 indicated the following results: Surface Soil At Rate Test # Elevation Test Depth m i P-7 971 Silty Clayey Sand (SM-SC) 15 P-8 97q Silty Clayey Sand (SM-SC) 10 REMARKS: As satisfactory rates had been obtained in percolation tests OP-S, P-7 and P-8, and as the elevations tend to slope downward in the area to the southwest of the proposed building, it ears likely that a suitable drainfiel site exists in the lower area somew at to the southwest of the present proposed location. GENERAL: If we may be of further assistance in evaluating these data, or in providing a drainfield layout for this lot, kindly contact us at your convenience. Very truly yours, RAUN ENGINEERI TESTING, 1 ant DMR/JSB:skf The content of IN$ report and supporting documents are for the eadusi" use of Ihe addressee In the absence of our prior written approval we make no representation and assume no responsibility to any other parties regarding such content INC. BRAUn" ENGINEERING TESTING 1 oG OF BORINGS 0 PROJECT: 77-199 Soil Boring b Perc. Tests DATE: 5/11/7 Lot 4, Blk. 2 (McGrath House) Fairview Addition - Orono, Minnesota SCALE: 1"s4' BORING: B-1 :OCATION: BORING: LOCATION: R 974 See Attached Sketch U R . Depth Description o terials ASTM WL Depth Descri lion of Moterials WL SANDY CLAY, dark brown, CL moist 2 (Topsoil) SANDY CLAY, light brown, CL moist (Glacial Till) SAND, slightly SILTY, with fine Gravel, yellow brown, moist (Coarse Alluvium) SP-S Water level not encountered when probing boring immediately after withdrawal of auger. i Water level not encountered when probing boring 15 minutes after completion of borin . i Water level not encountered when probing boring 24 ho g after completion of borin , u .-.L t ` An Expansion of Soil Engineering Services, Inc. 91mun, TESTING MINNEAPOLIS/ST. PAUL 6600 S. I:oonty Rd.18, P.O. Box 35108, Mp1s., Mn. 55435 / 612.941-5 J. S. BRAUN ► E , /Ms.*.t /� 0wEe PH AlloffiKRUSE Om.E. V`.'hn Opwh'"ns NORTHERN MINNESOTA 3I19 E. 191A Avenue, Hibbing. Mn. 557461218.283.8889 O +',uCi U � f. RR USE I E. Vrce Ma En,inwrJn, July 15, 1977 O JUL 20 WT N i t z, Inc. VILLAG9 08 OBOE 1989 Fagerness Point Rd. Wayzata, Minnesota 553�', Re: 77-199 ADDITIONAL PERCOLATION TEST Lot 4, Block 2 Farview Addition Orono, Minnesota Gentlemen: so60 ��w-' '94--a— As requested, we have recently conducted two additional ,ercolation tests to provide information relative to the sk,il absorptivity rates in the proposed drainfield expansion arc�a on the above referenced lot. °rior to our recent investigation, this firm had conducted soil borings and percolation tests on the lot, results of which were forwarded _o you previously. Our most recent tests were conducted on July llth and 12th, 1977, at locations indicated on the attached sketch. INVESTIGATION METHODS: Percolation -tests were conducted in the same manner as described to you in our previc •eports of May of this year. RESULTS: Percolation tests indicated soil absorptivities in minutes per inch (mpi), as follows: Surface Test N Elevation P-9 969 P-10 968. P-7 971 P-8 970 Soil At Rate Test Depth (m i Silty Clayey Sand (SM-SC) 25 Silty Clayey Sand (SM-SC) 30 SILTY CLAYEY SAND (SM-SC) 15 SILTY CLAYEY SAND (SM-SC) 10 CONSULTING ENGINEERS/SOILS AND MATERIALS Test Borings • Foundation Engtns long and Reen—ondations • btspecUon of Construction • Material Testing of Sods Concrete and budding Components 77-199 Nitz, Inc. -2- July 15, 1977 REMARKS : Based on the results of the most recent percolation tests, as well as the satisfactory results indicated by previous testing in the area, it is our opinion that a suitable drainfield site with room for expansion exists in the area to the :southwest of the propo:;e�i house. Based on an average percolation rate of 20 mpi, City require- ments would necessitate installation of 250 lineal feet of 30-inch wide a► ptive trenches. City requirements indicate that disposal 1_ :s cannot be placed below the ground surface by more than 36 inches and the recommended depth i= 24 inches and that lines be no less than 4 feet a►io-c the known water table. The drainfield system for this lot can be de-, A u-ing five 30-inch wide trenches 60-feet in length fAl a 7-i.,t center to center spacing. Our recommended system design is also shown on the attached sketch. If you should have any further questions regarding this data, l:indj', contact us at your convenience. Very truly yours, BRAUN ENGINEEP TF `ING, INC. • v �Q, Dennis M. Rietschel i Assistant BraL. P.E. resident DMR/JSB:skf cc City of Orono Attn: Al Olson Building Inspector McCombs -Knutson Attn: Greg Frank The content Of Ihis report and supporting docu men is •r re for the saU usi.e use of the addressee In fhe aif ou, prnx written appal we make no feprefentation and as, pine no responsibility to any whet parties regarding Such content BRAHn" ENGINEERING TESTING t I0 g P J r n �o Telephone 473.7357 CITY of ORONO Poet Office Box 66 • Crystal Bay, Minnesota 55M * Municipal Offices On the North Shore of Lake Minnetonka July 20, 1977 Mr. Greg Frank McCombs -Knutson Associates 1290S Olson Memorial Kighway Minneapolis, Minnesota SS441 Dear Greg: I an enclosing a copy of the percolation test for the following properties: L/3060 Farview Lane 240 South Willow Ihive After your review of these reports, please forward your recommendations. Thank you. Sincerely, Tom Jacobs Building Inspector TJ: be Enclosure EcCOMBS-KNUTSON ASSOCIATES, INC. CONSULTING ENGINEERS ■ LAND SURVEYORS M SITE PLANNERS July 28, 1977 Mr. Tom Jacobs City of Orono P.O. Box 66 Crystal Bay, MN 55323 Subject: Septic System Review 3060 Fairview Lane Dear Tom: VILLAGE (A DBOo As you requested in your July 20, 1977 correspondence, we have reviewed the subject septic system application. Based on a site evaluation and the information submitted by Braun Engineering on July 15, 1977, we recommend that the application be approved. GF:sw 2106 Very truly yours, Mc OMBS-KNUTSON ASSOCIATES, INC. g rank, P.E. 12805 OLSON MEMORIAL HIGHWAY, MINNEAPOLIS, MINNESOTA 55441 TELEPHONE (612) 569-3700 22 NORTH MAIN STREET, HUTCHINSON, MINNESOTA 5WW TELEPHONE (612) 879-8029 SOUTHWEST ENGINEERING DIVISION, MARSHALL, MINNESOTA 58256 TELEPHONE (507) 532-6820 pnntt: i :in recycI ;i.rpnr Telephone 473.7367 CITY of ORONO Post Office Box 66 • Crystal Bay, Minnesota 55323 • Municipal Offices On the North Shore of Lake Minnetonka July 28, 1977 W. Benedict Zacher Zacher Construction, Inc. Rt. 1 Alexmdria, Minnesota Subject: 3060 Farview Footing and Septic System W. Zacher: Permits will be issued for the septic system and building construction with the understanding that you, the contractor, comply with zoning and building codes and correct deficiencies in the project which was started without proper permits, licenses and approved septic system by the City Engineer. 1. Septic System - I have received a call frost Greg Frank, our engineer, saying the second septic system subodtted for 3060 Farview is approved - 7/28/77. Permit is needed. 2. Bulkheads mist be continuously poured. 3• Pipe going to septic system must be cast iron if it is to be poured into the footing. 4. Patio footing mast be connected to house ir both places with reinforcing rods. Please see that these items are corrected and inspected before continuing with the project. Sincerely, Thomas Ja s Building Inspector TJ: be TO: David Nitz FRCM: Thomas Jacobs, Building Inspector DATE: August 9, 1977 SUBJECT: 3060 Farview Lane Plan received - June 1977 Survey received - July 6, 1977 - Drawn by Gordan Coffin Septic Information received - First proposal received with plans. Was disapproved July 11, 1977, by McCombs -Knutson Associates. It was disapproved because the boring and percolation tests May 16, 1977 were too high. Percolation tests indicated soil absorptivity in minutes per inch (mpi) as follows: Surface Soil At Rate Test I Elevation Test Depth (mpi) P-1 974.8 Sandy Clay 120� P-2 974.7 Sandy Clay 80! P-3 P-4 974.0 Sandy Clay 1002 974.0 Sandy Clay 120. P-S 973.5 Sandy Clay 55 P-6 973.5 Sandy Clay 120) The average of the 6 initial percolation tests is then 100 mpi. V. Two additional tests were requested by owner which were done May 17 and 18, 1977. 77-199 Nitz, Inc. -3- May 16, 1977 r Subsequent percolation tests on May 17 and 18 indicated the following results: Surface Soil At Rate Test 1 Elevation Test Depth (mpi) P-7 971 Silty Clayey Sand (SM-SC) 15 P-8 970 Silty Clayey Sand (SM-SC) 10 REMARKS: As satisfactory rates had been obtained in percolation tests OP-S, P-7 and P-8, and as the elevations tend to slope downward in the area to the southwest of the proposed building, it annears likely that a suitable drainfield site exist.; in the lower area somewhat to the southwest of the present proposed location. David Nitz Page 2 At this time, the system was unacceptable and a request for a new proposal was requested. Second Proposal Received July 20, 1977. At this time, it was sent to City Engineer on July 20, 1977. It was approved over the phone on July 28, 1977 by Greg Frank, McCombs -Knutson Associates. We received a letter from Greg Frank on July 29, 1977 approving the ser- i proposal. Al Olson told them they could do excavation for building and no more. Mr. Zacher informed us that footings were poured July 1S, 1977. Stop Work Posted (202e) by Tam Jacobs July 20, 1977. Work done without .,P mits - Building and Septic - UBC Sec. 301(a) Municipal Code of t--,no 22.040 Work done without UBC Sec. 304 inspection. Work done without license - Municipal Code of Orono 22.030. License application received at time the stop work order was posted July 20, 1977. Permits taken out by Nitz, Inc. July 28, 1977. Doubles Fee Charged. UBC Sec 303(a). Municipal Code of Orono 1.091. License went to Council July 25, 1977. Not approved until contractor complies with zoning and building codes and corrects deficiencies in project. License went to Council August 8, 1977. License approved subject to correction of deficiencies in footing and septic. Substandard Construction - Septic System 1. Footing drain pipe placed as if it was going out to drainfield. Village of Orono - Individual Sewage Disposal System Code of Minimum Standards 2. Septic Tank - second tank is not water tight. Plaster cracked. I.S.D.S. Code of Minimum Standards 3 (I) The inlet inverts only have 2" drop. Individual sewage disposal system Code of Minimum Standards 3 (J) Subsurface Disposal Field - I.S.D.S. Code of Minimum Standards 4 (F) Septic does not follow plan approved. Footings 1. Bulkheads must be continuously pours,.. 2. One drop has no steel. 3. Drop section goes over drain tile. 4. Cer._ar Footings does not follow plans.