Loading...
HomeMy WebLinkAbout#2201 Septic Site EvaluationS-P TESTING, INC. Steven 8. Schirmers • MPCA Cert.No. 627 951 Katydid Lane NE• St. Michael, MN 55376 • (612) 497-3566 FAX (612) 497-5011 State License #394 October 28, 1996 George Adams 600 Big Island Tom Robb 570 Big Island Jim Figger 580 Big Island Orono, Henn. Co., MN A site evaluation was completed on these properties for the existing on-site sewage treatment systems supporting the existing cabins. The existing systems are classified as failing due to not meeting the 3' separation from the saturated soil (mottled soil) or lack of system. The existing tanks are old, either metal or block type and will need to be abandoned, pumped and filled with soil. A new system will need to be installed. This on-site sewage treatment cluster system is designed for a Type 3, 3 bedroom 218 gal/day each cabin totaling 654 gal/day, in accordance with the Minnesota Pollution Control Agency Chapter 7080 and0 local ordinances. An easement agreement will be required by the city. The agreement will require a maintenance schedule for maintaining the tanks, and shared electrical costs, etc. A water meter will need to be installed in each cabin to monitor the daily water use and to be recorded with the property. The system will be installed in the road easement and 5' from the property line and will need approval from the city. Approval will also be needed for a tank to be 5' from the Robb cabin to stay out of a low area. The soils on this site are SCS soils mapped -HbC -Hayden loam. The seasonally saturated soils were located at 5'10". The bottom of theftreatment area must be located at least 3' above the seasonally saturated soils. A standard gravelless 1 O" diameter trench system may be installed. The soils at a depth of 30" have a percolation rate averaging 10.4 mpi. The new tanks may be plastic but must be heavy duty due to the high water table, see the site plan for the location. 1 A pumping chamber will need to be installed to lift the septic effluent to the treatment area. The power supply and switches must be located outside the manhole and pumping chamber in a weather proof enclosure. A warning device must be installed with a light and sound device, this is in case of a pump failure. An exterior device will need to be installed. All neighboring wells are located greater than 100' away from the proposed treatment area and 50' away on this site (deep well). Approval will be needed to be 50' away from a well with a tank at the Robb cabin. Recommend to install low water use facilities in each cabin, 1.6 gal/flush toilets, low flow shower heads, etc. Keep all heavy equipment off of the proposed treatment area before and after construction. The treatment area should be marked off before construction. This Design is not valid & the system will need to be relocated if failure to protect the areas proposed for On-Site Sewage Treatment occurs. With proper installation and maintenance, this system should have no problem in treating septic effluent effectively. Nothing other than gray water (laundry, showers, etc.) should be disposed of into the septic tanks. Garbage disposals are not recommended, due to adding more solids & fine solids passing through to the system. Excessive amounts of soaps, cleaning agents & chlorine agents may kill the bacteria needed to treat septic effluent. Additives are not recommended. Recommend to pump & clean your tanks through the manhole by a certified pumper every 2 years. Check with your pumper to set up a schedule. <;r L--_f} . S, {__ Steven 8. Schirmers 2 J . } . J INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET A. B. C. D. E. F. H. I. J. K. L. M. N. 0. FLOW Estimated measured WY gpd ~"pp \_~~ _-__ x 1.5= ~ gpd SEPTIC TA.l\11< VOLUME --'d."---.,_/-=o-=o~o"--______ gallons ~\'S <\--A'c>A-Yl'l s I -/OOD r=:\\.,\.:,~ SOILS (Site evaluation data) Depth to restricting layer= 5 1:..10'1--rb "'7 ') ' Maximum depth of system C -3 ft= :i. .s' Percolation rate Jo. l.f MPI SSF ill_ sq ft/ gpd LDA-w\ Se>\\..- feet feet TRENCH BOTTOM AREA 6~1.f'?\...\.-"F-'E>S For trenches with 6 inches of rock below the pipe: A x F = i.e2:1_ x J,V? = LQ!:13. sq ft of bottom area For trenches with 12 inches of rock below the pipe: Ax Fx0.8 = __ x __ x 0.8 = __ sq ft of bottom area For trenches with 18 inches of rock below the pipe: Ax F x 0.66 = __ x __ x 0.66 = __ sq ft of bottom area For trenches with 24 inches of rock below the pipe: Ax Fx 0.6= __ x __ x 0.6 = __ sq ft of bottom area BED BOTTOM AREA For seepage beds with 6 or 12 inches of rock below the pipe; 1.5 x A x F = 1.5 x __ x __ = __ sq ft of bottom area ROCK VOLUME IN CU Ff Rock depth below distribution pipe plus 05 foot times bottom area: M =Rock depth + 6 inches x Area (H,I,J,L,K) <-=_ + 0.5 ft) X -=-=-=-CU ft ROCK VOLUME IN CU YDS Volume in cu ft divided by 27 M + 27 = cu yds -= + 27 = _::_ cu yds ROCK WEIGHT Cubic yards times 1.4 = tons N x 1.4 =tons_-_ x 1.4 =-=-tons DISTRIBUTION (Check one based on slope) __ Bed (less than 6% slope) Trenches _\L_ Drop boxes (any slope) __ Distribution box (level to slightly sloping) TRENCH LENGTH P. Select trench width=~ ft "'Jo 1l,;;,,-i:L i.:,""?'+lrP\..~$S Q. Divide bottom area by trench width: (H, I, J, or K) + P = lineal feet /<ZJ1.. + 2._ =~lineal feet ~s~ ::s 'J 0.1...i\-l.f"'\. LAWN AREA IO 'l.;.,A. l.:,"'i'.-A\X'.U-,-.,."" -Y,y>-i:: R. Select trench spacing, center to center= __ feet S. Multiply trench spacing by lineal feet Rx Q = sq ft of lawn area __ x __ = __ sqft LAYOUT (Use other side) 1. Select an appropriate scale; one square = __ feet. 2. Show pertinent property boundaries, right-of-way, easements. 3. Show location of house, garage, driveway, and all other improvements, existing or proposed 4. Show location and layout of sewage treatment system . 5. Show location of water supply well. , 6. Dimension all set backs and separation distances. D-25 Estimated Sewage Flow in Gallons pa Day (&>d) Number of Type! Type D Type DI T~p: IV Bedrooms 2 300 225 180 6'~ 3 450 300 218 ex 4 600 375 256 """ -5 750 450 294 = 6 900 525 332 ""' 7 1050 600 370 """'"' ca==-8 1200 675 408 Number Minic.1= MinC:::i= of Se~Tc.i: upaciryw-o . u.id G~ Bedrooms upaciry Dispoa.: (galloc,s) (gallocs) 2 or less 750 1,125 3 or4 1,CXXJ 1,500 5 or6 1,500 2.250 7 or 8 2,CXXJ 3,000 over9 See fig. C-6 (x 1.5) Soil a... ... .....,.. Requ=d A.-k,, ~ - Pa=l.otion R,t, _ .... c.:- Soil Texture ~ ,_.., Minu""pc,inch ,...;:;-(mp) Faster th.an 0.1 • Coarse Sand -- 0.1 to5 Sand 0.83 1.20 0.1 to5 FineSa.,d-1.67 0.60 6to 15 Sandy Loam Jib 0.79 _l6J~ 30 Loam 0.60 31 to45 sillloa:::n 2.00 0.50 4oto60 Oatll..o=, 2.20 0.45 Slower than W--ay -(0.24) . rt!~.::::..:·~~~ -Soil hayjng 501I. o, znon, <i 1w o, vayfi.ne Mn<!. -Soil -ith too lagh • paa,-t..,11" al day lor iNtal.l.wtionci an inpvu.nd atar,,d,ud •ywcc:n. .6 inches= 0% Reduction:it- 12ifuches= 20% Reduction 18 inches= 34% Reduction 24 inches= 40% Reduction * sizing for gravelless trench _;:;i,'i''- t I/ 3D 'l- Figure D-26 I t '3,. 1oo' -----------------w~----- I ~ 0 I 'I~'?..\ \...OvJ \..A\L'G-M1,-.\~\~oµ¥,A UJ~$~';::, :y\-;:,•c 9-:).~ -'7 l.. 'f;::.\..-:) ;i. "6. 3(... x 9~4.4 S Percolation Tests '-Soil Borings ©Bencr. Mork !"-s. C""Q I Scale '-~d=....._____,.:::,~--- Note: This sys tern is lo be constructed to meet the Minneso10 Pollution Control Agency Chapter 7080 & Local Ordinance Note Check all underground utilities II: 0 "" 0 -=t:: ) ).:: \\} < _J i 0 () l ,-~ n; {jJ ' ~ <!: a -:! z _) fl -[';> -j. ~ 'tP r( £ IJ LU )£._ ~ -J S-P_TEST!f(j 1/iJC.( . Designed By:~¼ \JS, '-:JcZl~--- Do:e lQ_!;tj/z!-, PH_ 612-497-3566 HOUSE t.A-'"'13,).,___,, ___________ 1 ___ existing grade j I I txick f1llt:J.."min. l -g, -I I rake sidewalls a bollom to I J_ .____,_--,:;,. _ _, . . remove smearing SET-BACKS I . r+- System must be: Tonk ;t2__' from property lines TRENCH X-SECTION ..1£' from wells AYi"'i'OVA\.. 1--\~'f"' ~o 1 ~o from bldgs. A~~ ~' ( min. of two 1renches) Treatment area ~ • frcm lakes , -' streams 1 Treatment area :JO ' from property lines it~A\...... :; I • Hl-\1-l~olii:=;s V'r\,..,_,:i._'' ~• from wells ~ '-!Lf1 1...1... w 'from bldgs. 1--.J.Q.' from trees ___.Note: Power supply ~nd switch_es must be in a weather · ~ proof enclosure outside . pumping chamber ~min. Tank Tonk C\~;),() I I ,-, -I I ( II . I I I I I I I I :i._ .PJR~-----,__ __ ; ---->----L--'---·' , ___ , . ---·· _____ ,, = .-----, = I •,------c;~l ---. l--.J ,---1 ·---, :: --_-.;..OJ :D~ :..O_! 1-~o~ Grade )~% slope "ft...WJ \.\ µ~ ,, -, ~ .- -__,.,...... , ... -r-~ 'p\... "l'-\'l, S' At least <3 1 • of undisturbed \._ Pumping earth between trenches -,¥:--A\..\.. ~>(1<:,-)\)-1~ -rA,µ~ W\\.-\.... t--l~ ~ 1',~ A°?, ffi-l-~ ~ 1 °Y \,-l W\. <;" ~ °'Pl'\.-I-W) !::,O I'\.... Chamber DROP BOXES Drop to Tank Min. 111 to 8' Max..r"·to4 1 4 11 to 6 11 dia. pipe ¼¥-~ -'\"ftµ '?--S ~µ-'A-\..-\....ClW SYSTEM DESIGN <...SY '::l""'\) °'"'':l s~ 1..~ TYPE--_ ,-BEDROOM -Percolation rotel£.:.:L. min.finch (design /£,-30 min.finch) l1i~A.L>~ SOIL BORING ELEVATIONS TH.11 I EL.-45'0,l ,c TH."2 EL. -~If TH."'3 EL.-~ 00 • TH ... 4 EL.-..:1'.:l.'.:1.0 TH~5 EL.-_ ELEVATION at PROPOSED PUMPING CHAMBER-~ {ground elev.) "J.;i_g.o ~ ~ VU:X..V U~\~Af°_f-1,•~-''l~ -"j3'.!>.0 -Ylbb~ " Ji " 11 >I -9~!-,0 ITTAW\';;, ,, Y( ,, '1 -"133.0 Treatment area required w / C::," of rock filter material 1 10""\4, =~sq.ft. of trench bottom area needed -;-.J.k." trench width = .;32Q lin. ft. of trench needed I number of drop bo;es~ Number of tonks required~ , I st tonk Joou gal , 2nd tonk/ow gal. minimums ~-1000 $ I ( to be determined by the installer) Cleon rock-cu. yds. ( 3/4 " to 2 112'' dia. , includes 2" above pipe ) 3') o 1..1µ ,?'\ \0 '~,A. i..,,-v-A~~ YY'<'~ Pumping chamber capacity= 25 % of doily sewage flow· of~ gal. ~gal.+ Reserve . .storoge~gal. -t Pipe. back drainoqeJ.2... gal = Jlk!_ gal. cap. l'I l'-'C>-4-,.__'<'~ ws,e )-'V'IY) 1?.S"o ~ ~- ( Reserve storage = -::. . gal. / bedroom ="'1"10 • gal. 1-pipe back drainoge-.b{ gal./ 100 lin. ft. 2 "pipe -length of pipe needed app...:1,.£_ ft. = .1.2.. gal.) Pump size \Jd,._ hp w/mercury float pump controls ~W::::s? ;;;i_(o' \--\1:':f\---o ~ss 1 '°'vlb'-'\:IA:Y:::~ 4~ 'Q½\ )\(\'l•n. mA->L· Note : W_hen constructing bed -:-, this area shouk:1 be shaped to divert run-off from entering treatment area. Note: Distance from treatment area to neighboring wells- L:,:'?:~:::'f:---·n-\-&1-:\ I Oo' PROPERTY OF :;fq'f;~ , s;")l::.u:¥'."?::'k 4:1.\-vA:»:JS I EDD J (r,{.D 4 l,OO S-P TESTING l~C. Designed By: !z~ .f::h. L .:__ Dote :!Q IZJ.l":'LJ,;;;,, PH. 612-497-3566 --,. \ r ) I ) PUMP SELECTION PROCEDURE A. Determine pump capacity: Gravity Distribution 1. Minimum suggested is 600 gallons per hour (10 gpm) to stay ahead of water use rate. 2. Maximum sugges~elivery to a drop box of a home system is 2,700 gallons per ho~o prevent build-up of pressure in drop box. Pressure Distibution 3. a. Select number of perforated laterals ____ _ b. Select perforation spacing= ____ feet. c. Subtract 2 fl from the rock layer length. Roc:Jti. ~ -2 ft. = ___ feet. d. Det~e the number of spaces between perforations. Length perf. spacing=_ ft. + __ ft. = __ spaces e. __ spaces + 1 = ___ perforations/lateral f. Multiply perforations per lateral by number of laterals to get total number of perforations.~ x pcns)t.,..-.J = __ perforations. g. 751!"' X gpcvp<rl= __ gpm. SELECTED PUMP CAP A CITY L) £ gpm YYJ 4 J.-. B. Determine head requirements: 1. Elevation difference between pump and point of discharge. :l__c?-, feet 2. If pumping to a pressure distribution system, five feet for pressure required at manifold if gravity system, zero. 3. 4. __, feet Friction loss a. Enter friction loss table with gpm and pipe diameter. Read friction loss in feet per 100 feet from table. F.L = :;s, ~~ ft./100 ft of pipe b. Determine total pipe length from pump to discharge point Add 25 percent to pipe length for fitting loss, or use a fitting loss chart. Equivalent pipe length -1.25 times pipe length = °Z.C x 1.25 = i l "lS' feet c. Calculate total friction loss by multiplying friction loss in ft/100 ft by equivalent pipe length. Total friction loss= ::3 ,;t."tS" x ) ) ~ +100 = LJ Total head required is the sum of elevation difference, special head requirements, and total friction loss. ~:i.____ + ____ + y (1) (2) (3c) TOTAL HEAD a(..,, feet feet C. Pump selection 1. A pump must be selected to deliver at least YS gpm (Step A) with at least ;;\,.lo feet of total head (Step B). YVJA-x... F-17 El-0 PERFORATION OF A PERFORATED LATERAL .._ -AJ l.eo,1 12• lo !dQ• .-...;,=-<;""'-'=a:w...-h--W:,.:.:l!'.!· ot Roca L#'rff Required Perforation Disch~e in gallons per minute (gpm D~e 12 md,pal /4" .,d, pal Head (feet) 1.0a 0.56 0.74 2.0b 0.80 1.04 a. Use for single family homes b. Use for all other applications Pipe Length □Pump Point of Discharge ______ T~so Elevation Difference I ~'1.::i.i F-18b 1.5 inch 2.0 inch 3.0 inch gpm Fria.iai lea per l 00 ft of pipe 10 0.69 0.20 12 0.96 0.28 14 1.28 0.38 16 1.63 0.48 18 2.03 0.60 20 2.47 0.73 0.11 25 3.73 1.11 0.16 30 5.23 1.55 0.23 35 7.90 2.06 0.30 40 11.07 2.64 0.39 45 14.73 3.28 0.48 ~-3.99 0.58 55 4.76 0.70 60 5.60 0.82 S-P TESTING, INC. Steven B. Schirmers • MPCA Cert.No. 627 951 Katydid Lane NE• St. Michael, MN 55376 • (612) 497-3566 FAX• (612) 497-5011 State License #394 LOGS OF SOIL BORINGS Adams 600 Big Island Robb 570 Big Island Figger 580 Big Island Orono, Henn. Co., MN Borings completed on 9-24-96, with a hand bucket auger. BORING NUMBER 1-Elev.950.1 -MOTTLED SOIL AT 5'10" -No standing water present in boring. 0 - 10" - 14" - 34" - 70" - 10" 14" 34" 70" 84" Topsoil dark brown loam 1 0YR 3/2 Gray brown loam 1 0YR 4/2 Brown clay loam 1 0YR 5/4 Yellowish brown loam w/traces of sand 10YR 6/4 Rusty brown loam to sandy loam 1 0YR 6/4 -mottles 6/1,6/6 BORING NUMBER 2-Elev.953.4 -NO MOTTLED SOIL PRESENT IN THE BORING. 0 -10" Topsoil dark brown loam 1 0YR 3/2 10" -30" Brown clay loam 1 0YR 5/4 30" -36" Brown loam 1 0YR 5/6 36" -72" Yellowish brown loam w/traces of iron staining 10YR 6/4 BORING NUMBER 3-Elev.951.4-MOTTLED SOIL AT 5'10" -No standing water present in boring. 0 10" 10" -20" 20" -30" 30" -70" 70" -84" Topsoil dark brown loam 1 0YR 3/2 Brown loam 1 0YR 5/4 Brown clay loam 1 0YR 5/6 Yellowish brown loam 10YR 6/4 Rusty brown loam 1 0YR 5/4 -mottles 6/1,6/6 570, 580 & 600 Big Island, Soil Borings Cont'd. BORING NUMBER 4-Elev.949.0 -NO MOTTLED SOIL PRESENT IN THE BORING. 0 10" Topsoil dark brown loam 10YR 3/2 10" -16" Brown loam 1 0YR 5/3 16" -30" Brown sandy loam 10YR 5/4 30" -40" Brown loamy medium sand 1 0YR 5/4 40" -80" Brown medium sand 1 0YR 6/3 2 CERTIFICATION N0.627 STATE LICENSE N0.394 PERCOLATION TEST DATA SHEET Percolation test readings made by S-P Testing, Inc. on 9-25-96 starting at 11:09am. Test hole location 570, 580 & 600 Big Island, Orono. Test hole number 1. Date test hole was prepared 9-24-96. Depth of hole bottom 30 inches. Diameter of hole 6. inches. SOIL DATA FROM TEST HOLE DEPTH,INCHES 0 -10" Topsoil dark brown loam 10" -14" Gray brown loam 14" -30"' Brown clay loam SOIL TEXTURE Method of scratching sidewall is ~-Depth of gravel in bottom of hole is 2 inches. Date and hour of initial water filling 9-24-96, 3:00pm. Depth of initial water filling is 12 inches above the hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours is automatic siphon. Maximum water depth above hole bottom during test is 6. inches. Measurement, Drop in water level, Percolation rate, Time Time interval.min inches inches minutes per inch Remarks 10:55 prefill 6 11 :09 11:39 6 2-1/4 13.3 30min 11:46 12:16 6 2-1/4 13.3 30min 12:17 12:47 6 2-1/8 14.1 30min Percolation rate = il...6_minutes per inch. I CERTIFICATION N0.627 STATE LICENSE N0.394 PERCOLATION TEST DATA SHEET Percolation test readings made by S-P Testing, Inc. on 9-25-96 starting at 11:10am. Test hole location 570,580 & 600 Big Island, Orono. Test hole number 2.. Date test hole was prepared 9-24-96. Depth of hole bottom 30 inches. Diameter of hole .6. inches. SOIL DATA FROM TEST HOLE DEPTH, INCHES 0 -10" Topsoil dark brown loam 10" -30" Brown clay loam SOIL TEXTURE Method of scratching sidewall is .knik,. Depth of gravel in bottom of hole is 2 inches. Date and hour of initial water filling 9-24-96, 3:00pm. Depth of initial water filling is 12 inches above the hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours is automatic siphon. Maximum water depth above hole bottom during test is .6. inches. Measurement, Drop in water level, Percolation rate, Time Time interval,min inches inches minutes per inch Remarks 10:55 prefill 6 11 :10 11:40 6 3-5/8 8.3 30min 11:45 12:15 6 3-3/8 8.9 30min 12:18 12:48 6 3-1/4 9.2 30 min Percolation rate = M...minutes per inch. CERTIFICATION NO.627 STATE LICENSE NO.394 PERCOLATION TEST DATA SHEET Percolation test readings made by S-P Testing, Inc. on 9-25-96 starting at 11:11am, Test hole location 570,580 & 600 Big Island, Orono. Test hole number J.. Date test hole was prepared 9-24-96. Depth of hole bottom 30 inches. Diameter of hole ~ inches. SOIL DATA FROM TEST HOLE DEPTH,INCHES 0 -10" Topsoil dark brown loam 10" -20" Brown loam 20" -30" Brown clay loam SOIL TEXTURE Method of scratching sidewall is .kn.ire. Depth of gravel in bottom of hole is 2 inches. Date and hour of initial water filling 9-25-96, 3:00pm. Depth of initial water filling is 12 inches above the hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours is automatic siphon. Maximum water depth above hole bottom during test is ~ inches. Measurement, Drop in water level, Percolation rate, Time Time interval,min inches inches minutes per inch Remarks 10:55 prefill 6 11: 11 11:41 6 3 10 30min 11:44 12:14 6 2-7/8 10.4 30min 12:19 12:49 6 2-5/8 10.4 30min Percolation rate = .l!U_minutes per inch. CERTIFICATION N0.627 STA.TE LICENSE N0.394 PERCOLATION TEST DATA SHEET Percolation test readings made by S-P Testing, Inc. on 9-25-96 starting at 11:12am. Test hole location 570,580 & 600 Big Island, Orono. Test hole number~ Date test hole was prepared 9-2+96. Depth of hole bottom~ inches. Diameter of hole .6. inches. SOIL DATA FROM TEST HOLE DEPTH,INCHES 0 -10" 10" -16" 16" -30" Topsoil dark brown loam Brown loam Brown sandy loam SOIL TEXTURE Method of scratching sidewall is ~-Depth of gravel in bottom of hole is 2 inches. Date and hour of initial water filling 9-24-96, 3:00pm. Depth of initial water filling is 12 inches above the hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours is automatic siphon. Maximum water depth above hole bottom during test is .6. inches. Measurement, Drop in water level, Percolation rate, Time Time interval.min inches inches minutes per inch Remarks 10:55 prefill 6 11:12 11:42 6 3-1/2 8.6 30min 11:43 12:13 6 3-1/2 8.6 30min 12:20 12:50 6 3-1/4 9.2 30min Percolation rate= 8..8.Jninutes per inch. j ) -OUTLET TO H~ENCH T:- 1 'J r T - I I l' .. :-' -i-·-·-2 .. ~ ·}-... , NOTES I. ALL PIPES SHOULD BE 1/.T LEAST 4 -INCH DIAMETER. 2. ELEVATION OF INLET ANO SUPPLY LINE 1"0 NEXT DROP BOX MAY OE AD,JUSTEO _ UP OR DOWN f"OR DE51P':!• !:;'FLUEt<l LrVEL IN TRENCH. 3. SUGGESTED TRENCH LIQUID LEVELS: (A) 2 INCHES ABOVE TOP OF OUTLET PIPE IF PERMEABLE SYNTHETIC FABRIC COVERS ROCK;. (8) AT TOP OF OUTLET PIPE IF HAY OR STRAW ANO BUILDING PAPER COVERS ROCK. 4. INVERT OF INLET MUST BE AT LEAST ONE INCH HIGHER THAN INVERT OF SUPPLY PIP£ TO NEXT DROP BOX. 5. TJ'1ENCHES MAY OUTLET ONE SIDE OR BOTH SIDFS OF nnoP fJOX. _L..._._,1;.,_ ____ _,w--~~ '"L-----,---4·, /--, .-:~-··-INLET 9--1 --SUPPLY LINE ., -r -I I I 1/ I. J,... -T I . 11-01, --- : -{·---OIJTLETS-'" I ,..1 _ -7-j ' I I I I I --1-' L 1--- 1 1 TO TRENCH L-------' 1 I · OUTLET TO L-------.J TREtJCH DROP BOX GRAVELLESS TRENCH CONSTRUCTION DETAILS Inspection Backfill .._----Trench Length = up to , 00 Feet-----i►MI Overfill to Allow NOTES: 1. Bottom of trench must be level. Top of tubing must be le_vel. 12· of Soil 24 .. : Backfil_l_ •~ Backfill LLO! T . I ~~-Holes Located j.-24 • -.J "'-at 4 and 8 O'Clock 2. Scarily trench bottom and sidewalls al least 12 inches abo'lfc trench bottom to expose natural soil. 3. For proprietary products consult · · . manufacturers perlormance criteria. Figure D-33 F-8 PLASTIC ROPE OR CHAIN WITH ANCHOR ----- ALARM FLOAT ON SEPARATE ELECTRICAL CIRCUIT __ SJARJ_LEYE.L ~-_ ~~ _ ., . 3"J \ PUMP CONTROL FLOAT CONCRETE MANHOLE RING AT LEAST 12• BELOW GRADE .._,...,,.1-_.__WIRE FROM POWER SUPPLY PIPE IS LAID ON A UNIFORM SLOPE FROM PUMP STATION UP TO SOIL TREATMENT MEA ,: FOR PROPER ORAINBACK , . l_ IF PIPE AT TANK MUST BE LOWER THAN UNION. TO GET ELEYATION FOR DRAINBACK, A l/-4 INCH WEEP HOLE MUST BE USED -WEEP HOLE NOTES: ELECTRICAL WIRE FROM POWER SUPPLY MUST NOT RUN OVER ANY TANKS BUT MUST BE LAID BESIDE OTI IER TANKS AND MUST BE PLACED IN CONDUIT ALONG POST -- ELECTRICAL CORDS FROM PUMP AND FLOATS MUST BE RUN THROUGH CONDUIT. WIRES CANNOT HAVE GROUND CONTACT. Figure F-8 METHODS OF SECURING MANMOLE COVER TO PREVENT UNAUTHORIZED ENTRY Figure C-14 :at•,' VERTICAL SIDEWALL SEPTIC TANK _,,,.,-FINISHED GRADE V. .,,. 1 !, 1,_ l-. f;,r: -AT LEAST ~ ~ 116• T',o 12'' SOIL w AT LEAST ~ 1" 4 • DIA. .-----i 1 cOVER 4u DIA.~ Ml;~Lt----+;'-A-_:-_ .. -~-E_A_S_T_1··--,,-_-,-'--i :: • 1 - 1~----.:-1/. _ AT _____ ;..~~ST I" 1 ....... : _ · r r Y/ -:: l t Al DIMENSIONS FOR TANKS \YITH VERTICAL SIDES A ,__ --+-1-~?o,'l,,------1 ~Wc.!.ID!,!-T..!.-□H.....!;Wr_11~2:::4!.."_!!;M!_!!INc!·~,M~U~M~----------lt---+-1 _\:_E;_r:!GTH L 2 TO 3 TIMES THE W-'-'--"ID,-'T'-'-H'-------t -A B DIAMETER 60" MINIMUM _j_ DEPTH D 30" MINIMUM· 78" MAXIMUM l --i 0.2 D C[ ------AT. L3E,, AS_T____ ----·· ---B 6" MINIMUMi_(?.2 D MAXIMUM . -• C 0.4 D ..__ ___ _____. _______________ __, -·-AT LEAST 4 FEET-----------.J NO!ES; 1. SN411N~Y lEliS Al LfMl • INCi IES IN Ow.AElF.n 2. 111El"£SIW L DI, OtlE onuo11e ,.ma tOlES, 20'"lF.ASl OIIKJlSIQNNIO LOCAlFO WIIIIIN 6 FEE! or-1'1.l llll'll( " WM.LS. l. AN tJSl'ECIIOH rll'E OF AT LEAsr 4 INCIIES 01""41a1Ell ORAI.Wll lOlE SI W.l llHOCAlEOOVEll !X>lH llE INLET NlOOJTL.El [)(;VIC(S. lHECEtllEl1LINC()r-111: flSl'~ClOl r1res $1 WJ. 0C 1 IIE SM£->S lllE CCH I t:n I INE OF l HE DNFLE OPCNINGS 011 SN<II/JtV lCES. A 1141/IOINSl'ECIION l'M'(UJST RE LOCAIU>BEIWCCN TIIE tA.EI ,,,,._,ooll(l ONrLES. :.- ◄. ~WUKJC E OOVERS SIW.L IELOCAIEOWIIIIIN I'-INCHES. 1rr1E MNlllOLE IS WlllllNSU( IHCIESOf 1111; SUIV'ACE 11 E CX:WEH MJS I DE SECU'EO TO l'IEvtarH =s.'l. 5. 51,rAnAION OISlANCE OCTWEEH F.NOoi: H.El rrF. ANl) NE>J1ES1 f'OINI ON OAffLE SHAU. l!E NO I.ESS lllAN 6 INCi tES 00 NO M:>l'IE TI~ 12 NCIIES. 6. Fon I IOIIZOI◄ IAL CYLllOOICAI.. lANK~ 011,l(tmlON A IS 0, 1!.0 ANO 011.f:NSION C I~ 0.350. ' ...... '!tt:: •.. ; CLEAN OUT TANK WHEN: ~ MEASURE IN SCUM THE "I( IS 3• OR LESS OR •a• IS 12• OR LESS ~ BLACK COLOR DISTINGUISHES SLUDGE LAY~ FROM LIQUID AND SLUDGE ACCUMULATIONS SEPTIC TANK I)