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HomeMy WebLinkAbout1986-12-15 Septic System Design ReportF' I i B( SYSTEM DESIGN FOR CHAD & SUSAN LANNOM OF LOT 1. BLOCK 2^, JOHNSTON'S FRENCH LAKE SECOND ADDITION ORONO, MINNESOTA 12-15-86 1. Percolation Rate. Type of System. 30.7 minutes per inch for holes 4.5, and 6 for a shallow trench system. The alternate site near perc. holes 1 and 2 with an average rate of 45.8 minutes per inch would also need a shallow trench system if ever used. 2. Proposed Flow Rate. 3 bedrooms @ 150 G.P.D. = 450 6.P.D. 3. Soil Treatment Area Required. 2.0 percolation factor x 450 G.P.D. 4. Size and Numbt-r of Trenches. 900 Sq. Ft. Minimum. 4 trenches 3 feet wide and 75 feet long = 900 Sq. Ft. These trenches would be 1-1.5 feet deep in the natural soil and be spaced a minimum of 7.5 feet apart center to center. 5. Drainfield Rock Needed. 50.0 cubic yards of rock is needed to have 12 inches under and 2 inches over a 4 inch distribution pipe. It appears that some black loam fill will be needed over the top of the trenches. Also, either a swale or interceptor drain is needed to divert runoff water from going through the drainfield area. 6. Septic Tanks. Two septic tanks, of at least 1000 and 750 gallons are needed.In addition, it may be necessary to have a third pumping tank and pump depending on the final house elevation. 7. Additional Information. All construction and materials must adhere to the provisions of the City of Orono. All grading and construction traffic must be kept off both the primary and alternate drainfield areas. If any other information is needed, please contact me. Sincerely, PERCOR, INC. Mark S. Gronberg, PCA certified © 's V 5 V \ :',-< i v;' K ^ ^ •? ’ NJ i. o: k V4 k <9 yj K’lft’XAat'sll 1-^ Dri'.'c.V/iViev/ 2Z^.\0 mn•ntn /■/Z*/l'\/f — I'a r-I I;>vn M V' I/ / V in " '• '• I ^ ■40:‘ /K oCOH,• //OvKhS V,’(0Wi/•i k '4 S;.:Jk>r-/ /s-xV /•-» \\N \• I T >1^. n'/ 03P'•V /J<?•?rO/,/ff*'/"/-S'X /V t >X / 'A vi?> JP .\>5*\ C r 'k y / %'»v- <1•*.vO■Z.V •/V -/ V» A. •y u. v-S' '* i-^ «» (• c 1 s II I ri i? vV. ;* e5 ^ V V k s> A i b <T r JOimSTON PROP-SRTif LOT 1, BLOCK 2 Percolation R/^sulta Material Yellow Brn, Clay Loam Yellov; Brn, Clay Loam Brown Loam Brovm Clay Loom Bro^-zn Loam Brown Loam The Evg. percolation rate for holes l-4{primary site) = 39.5 MPI. The avg. percolation rate for holes 5-6(alt, site) = 2)4.,3 MIX. Hole No. P-1 P-2 P-3 P-5 P-6 Percolation Rate 43.6 Min./inch I1.8.O 22.9 k3.(> 21.6 26.7 s.B. ;/ 1 Deoth(ft.) 0.0-1.0 1.0-3.0 3.0-6.0 6.0-7.0 7.0-8.0 Kd mottled S . B . :r 2 DepthCft.) 0. )-0.8 0.8-2.0 2.0-1}.. 2 4. 2-6.5 6.5- .0 Ko mottled 3.B. 3 DenthCft.) 0.0-0.7 0.7-1.7 1.7-3,3 3.3-6.0 Soil Borings Material Gray Brovm Loam Brovm Clay Loam Yellow Brovm Clay Loam Bm. Sandy Clay Loam Light Gray Brovm Clay soil present v;ater table after 21}. hours. Material '>ray Black 1 oam Brovm Clay Loam Yello--; Brown Clay Loom Lt. Brn, >il ty Clay Loain i t, .Irp. Clay I oam soil and no v/ater table after 24 uours. Material Black Loam Erov.m Loam Brovm Clay Loam ia?lov/ Brn. Cl, ) oom 6.0-7.0 Lt, brn. Med. Sand 7.0-8.0 Coarse Sand, Gravel Wo mottled soil or v;ator table after 24 hours. e % o « 1- . c Lots of Soil Borings ■r»a. r:7^7rr-r-^s IJ~27 Location or Project Zyf/>/t/£f/i* _ 4 /y ^ /•q/zu ■' /-7,Vy^(... ^vv Borings nadc by j / ,/, ^/v/ /■^/ /________ Date _ /Z " ^ ^ Classification System; AASHO _ _ _; USDA-SCS ^ ; Unified _; other Auger used (check tvj): Hand or Power _ _; FliRht _ _, or Bucket ocl'cr Depth, In feet 0 Boring number ___ Surface elevation 2 — 3 4 — 6 — 7 — e — Zf^/irK Ci-<v YCuae^ End of boring; at Q feet. Standirs vatv>r table: . Present at _______ feet of depth, __________ hours after boring. Not present in boring hole Mottled soil; Observed at S- O feet of depth. Not present in boring hole _______ Observations and comments: o Depth, in feet 0 Boring number ___ Surface elevation 1 — 2 — 3 — /, — 5 — 6 — 7 — 8 — /Hack - cur End of boring at ^. i) feet. Standing v;atcr table: Prcccnt at _ _ _ _ feet of depth, _ _ _ _ _ _ hours after boring. Mot present in borin5; hole ^ Mottled coil; Observed at ^ ^feet of depth. Not present in boring hole Observations and coirments*. « r <9u t: *4 q:-jLU >V. I < r <.*..TOLi.q:lu <CCro gH 1 sotrtrtED 00(/) Qin -jiijux y :!S /IVJ I 1 .r-li. ii> ftO O09 -J O o q;^ I- y goSS (CliJ OH §oll-<t Z OtiJ CD(75^o .i (Vi *■: ■J :r- on- / / euccc/^ 53 < ecr cn Q D Z ili9 I" 1-5 « D-C- 9 =Ju3Op: C/)l- I