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PRINTER'S AFFIDAVIT OF PUBLICATION
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<br /> ~' · :' ~" ~ITY OF RAMSEY
<br /> :-~ £~:;' ~N OKA COUNTY
<br /> .' :";~{" ~". ' '. STATE OF'MINNESOTA
<br /> AMEN~M'ENT 'fO CHAPTER 1.50.01 .Known as the Sewage Dsposal Systems Chapter of the City
<br /> Code.
<br /> AN ORDINANCE AMENDING SECTION 150.01 of the City Code.
<br /> The Cil:~/:'df R. amsey ordains:
<br /> SECTION ~J. AMENDMENT
<br /> Sectioi~ 150.01 of the Ramsay City Code perle n ng lo on site treatment systems is amended lo read
<br /> as'foilows: "
<br /> 150.01.4E DOSING DEVICES FOR PRESSURE DISTRIBUTIONS
<br /> l;~The dosing device shall be a pump which is cast iron or bronze tilted and with stainless steel
<br /> screws or constructed of sound, durable and corrosion-resistant materials.
<br /> 2. The pump discharge capacity shall be at,least seven and one-half gallons per minute for each 100
<br /> square feet of soil treatment area· -'
<br /> 3.. The pump discharge head shall be at least five feet greater than the head required to overcome
<br /> pipe friction losses and the elevation difference between the pump and the distribution device.
<br /> 4.-Ttie quantity of effluent delivered for each pump cycle shall be no greater than 25 percent of the
<br /> one day's sewage flow.
<br /> 5. An alarm device she be nstalled to warn of pump failure.
<br /> 6. A siphon wil not be allowed as-a dosing device to deliver effluent to a pressure distribution
<br /> system
<br /> 7. The dosing chamber for a pressure distribution system shall either include a two pump system or
<br /> shall be'sized to i~lclude a minimum reserve capacity of 75 percent of the daily design flow.
<br /> S~ecti0h 150.01.4H of the Ramsey City Code pertaining to alternative treatment systems in the urban
<br /> service areas is amended to read as follows:
<br /> Final treatment and disposal of all sewage tank effluent shall be by means of soil treatment and
<br /> disposal. Percolation rate of Original soil
<br /> Subd, 1 - Sizing under sand layer, minutes
<br /> I. The required soil treatment areas shall be determined Dy number of bedrooms for dwellings and 6 to 15
<br /> defi'nitioh of "water usage" for other establishments. 16 to 30
<br /> 7. The minimum soil treatment area required for any dwelling shall provide for at least two (2] 31 to~15
<br /> I~ed~'oo~s.. 4~ to 60
<br /> .3. The'minimum soil treatment area required for multiple residential units shall consist of the sum 61 to.120
<br /> of the areas required for each individual unit.
<br /> r4..Trench and bed size shall be at least as large as set forth in Table II. -
<br /> TABLE II
<br /> ', Required soil Treatment Area in Square Feet of Trench Bottom
<br /> · Percolation Per Gallon
<br /> rate in min- of Sewage Flow' Depth of Filter Material Below
<br /> utes per-in-cb per day Distribution pipe lc)
<br />
<br /> "F~ster Than 6" 12" 18" 24"
<br /> 0.1 (d) Special ~Soil Treatment Required. See Section
<br /> 0.1 to5 (e) 0.83 170 170 135 i15 105
<br /> 61015 1.27 255 255 205 170 155
<br /> Pefc01ation Per Gallon
<br /> rate in min- of Sewage Flow Depth ol Filer Material Below
<br /> utes per inch per day Distribution pipe lc)
<br /> 16 to30 !,67 335 335 27(~ 225 205
<br /> 31 to 45 2.00 400 400 320 265 240
<br /> 46 lo bO 2.20 440 440 355 290 265
<br /> 61-i20 ia)
<br />
<br /> a. Table.I I Is based on a sewage flow of two h.undred (200) gallons per day per bedroom and shall be
<br />- used as the basis for sizing household systems
<br /> b. In every case, sufficient area Shall be provided for at least two (2) bedrooms in dwell ngs.
<br /> c. For. systems other than household systems, the required treatment area shall be based upon
<br /> -gallons of waste per day. The required treatment area may be reduced, for trenches only, by
<br />:;-.following percentages: Twenty per cent (20%) for twelve (12) inches of filter materials below the
<br /> dlstril~ution pipe; thirty-four per cent (34%) for eighteen (18) inches; and forty per cent (40%) for
<br /> twenty-four,(24) inches. The filter material shall completely encase the disposal pipes to a depth of at
<br /> least tw9~(2) inches.
<br />- d. Soil is unsuitable for standard system if percolation rate is less than one tenth (0.1) minute per in- ch.
<br /> e. Special requirements for treatment u~lits for problem soils with this percolation range. For soils
<br /> having more than 50 percent of very fine sand by weight, plus fine sand having a particle size range of
<br /> ..0.05 m~l reelers (sieve size 270) to 0.25 millimeters [sieve size 60), the required soil treatment area is
<br /> ~'1.6?.sqqare feet per gallon of sewage flow I~r day.
<br /> Subd. 2- Location
<br /> ~ ].:On slopes In excess of twelve per cent (12%), the soil profile shall be carefully evaluated in the
<br /> location of the proposed soil tr.eatmenl area and downslope to idenlify the presence of layers with dif-
<br />- 'ferent permeabilities that may cause sldehill seepage. In no case shall a trench be located within fit-
<br />'. teen (15) feet of where such a tayer surfaces on the downslope.
<br /> 2. Bed construclion ~hall I~e limited to areas having natural slopes of less than six per cent (6%).
<br />
<br /> 3. Any soil lreaffnent area shall be set back the following distances from the features given below.
<br /> Feature ~? . Setback Distancein Feet
<br /> .wate~ supply well less than 50 feet deep ant not encountering at least 10 feet of
<br /> . ~ mDe~yldbs mater a
<br /> "~-.' - ' .................................. ~ .............................. t00*
<br /> A,~y ~lher water supply well or buried water suction pipe .................. ; ............ 50
<br /> Burie~l. p!pe d str but on water under pressure ........................................... 10
<br /> Bui]dln~ .... : .......................................................................... 20
<br /> Property lines. ........ - ......................... . ....................................... . 20
<br /> ?Required for neW developments and, where app cable, for existing developments/
<br /> 4. Any soil treatment area shall be set back the following distances if Iocaled in an area which has
<br />! been designated as follows by any Iocal~ state or federal regulation. . ,
<br /> Ragolatiolts;t,-, ' "-'~ "~ .... ' ' SetbacR Distancein Feet
<br /> Recreational development lakes ....................................................... 75*
<br /> General development lakes and streams ................................................ 50*
<br />
<br /> Scenic river ................... ; ............. ~ .......................... .. .............. ' 100'
<br /> Critical river ...... ' ...................... '....' .................. ' .............. 100'
<br /> Designated'tributaries of Wild, scenic and recreational rivers .............. .~ ............ 75*
<br /> · Required for new ~levelopments and, where applicable, for existing developments.
<br /> 5. Soil treatment, areas shall not be placed in flood plains delineated by local ordinances adopted in
<br /> compliance with the Storewide Standards and Criteria for Management of Flood Plain Areas of Min-
<br /> nesota (Chapter 6120), or in areas for which regional flood information is available from the Depart-
<br /> ment of'Resources except that in areas where ten year flood informati'onr is available from and/or aP-
<br /> proved by the DNR, soil treatment systems may be installed In accordance with the provisions.of
<br /> chapter 7080.0210.
<br /> 6L Soil treatment areas of individual sewage treatment systems lhat are designed to treat an
<br /> estimated daily sewage flow greater than 3,000 gallons per day must be separated from other
<br /> Similarly sized systems by at least 300 feel '
<br /> Subd~ 3- Design and Construction '.
<br /> 1. The bottom of trenches and beds shall be at least four (4) feet above the water table or bedrock.
<br /> 2. The2 The trenches shalltrenches shall notnot b(be less ·than eighteen (18) 'roches, nor. more than th'try- six (36) 'roches w~de' .
<br />
<br /> soil treatment unit and the agricultural drain tile.
<br /> 3.. In all cases, the greatest practicable vertical separation distance from the water table shall be
<br /> provided.
<br /> Subd. 3 - Rapidly Permeable Soils
<br /> 1. Filter material fora soil trealment unit using gravity distribution of effluent shall not be placed in
<br /> contact with original soils having a percolation rate faster thn one-tenth (0.1) m Inure per inch.
<br /> 2. For coarse soils having a percolation rate faster than one-tenth (0.1) minute per Inch,- at least
<br />twelve (12) inches of loamy sand textured soil having a percolation rate between slx (6) and fifteen
<br />(15) minutes per Inch at the original site shall be placed between the filter material and the coarse soil
<br />along the excavation bottom 'and Sidewalls. The size of the soil treatment system must be based on the
<br />required treatment area for a soil having apercolatlon rate of 16 to 30 minutes per Inch as speciflec~ In
<br />Table I I.
<br /> 3. For soils with percolation rates between one-tenth (0.1) and five (5) ~rninules per Inch, at least one
<br />of the following treatment tecl!niques shall be used:
<br /> a. Distribute the sewage tank effluent by pressure flow over the treatment area as specified in this
<br />. chapter.
<br />b. Divide the total soil treatment area into at least four equal parts connected'serially; or
<br />c. Provide at least 12 Inches of loamy sand textured soil with a percolation rate between six and 15
<br />minutes per inch in site between the drainfleld rock and the coarse solls..Trenches must be used with
<br />this liner system. The size of the soil treatment system must be based on the required lreetment area
<br />for e soil ~aving a percolatioh rate between 16 to 30 mlnutesper Inch as specified In Table I I.
<br />Subd. 4- Mounds
<br /> Mounds
<br /> may be constructed on soils having the site or 411 cond t ohs specified In Section 150 0i4G
<br />2. The soil percolation rate In all layers of the natural or fill sell to a depth of at least twenty-four (24)
<br />inches below the sand shall be faster than one hundred twenty (120) minutes per inch.
<br />3. The allowable absorption area loading rate musl be determ'lned according to Table II I by the per-
<br />colation rate of the 12 inches of original or fill soft Immediately under the sand layer.
<br />
<br />TABLE III
<br /> Allowable absorption area loading rate
<br />gallons/day square feet per
<br />per square foot gallons per day
<br />0.79 1.27
<br />0.60 1.67
<br />0.50 2.00
<br />0.45 2.20
<br />0.24 4.20
<br />
<br /> 4. Below the sand layer, there shall be at least one (I) layer of soil, either nalural or fill, at least
<br /> twelve (12) inches thick, which has a percolation rate slower than five (5) minutes per inch (loamy
<br /> sand).
<br /> 5. Wherever possible, mounds shall be located on flat areas or crest of slopes. Mounds shall not be
<br /> located on nalural slopes of more, than three per cent (3%) if the percolallon rate Is slower than sixty
<br /> 160) minutes per inch 1o a deplh of at least twenty-four (24) Inches below the sand layer.
<br /> 6. Mounds shall not be located on slopes exceeding slx per cer~t (6%) If the soil percolation rate Is
<br /> slower than thirty (30) minutes per Inch toe depth of at least twenty.four (24) Inches below the sand
<br /> layer.
<br /> 7. Mounds shall not be located on natural slopes exceeding twelve per cent (12%) under any soil per-
<br /> colation rate conditions.
<br /> 8. The bottom area of the filter material shall be sized on the basis of two hundred (200) square feet
<br /> _per bedroom or ~igh_t-~hree hundredths (_0~83) qquare feet per gallon of waste per day.
<br /> 9. In no case shall the width of the filter material in a single bed exceed ten (10) feet.
<br /> 10. A rubber tired tractor may be used for plowing or dlsklng, but In no case shall a rubber tired
<br /> tractor be used after the surface preparallon Is completed. A crawler or track-type tractor shall be
<br /> used for mound construction where the sou percolation rate Is slower than' 15 minutes per Inch.
<br /> 11. The discharge pipe from the pump to the mound area shall be Installed prior to Soil surface
<br /> preparation. The trench shall be carefully backfllled and compacted Io prevent seepage of effluent.
<br /> 12. Soil Surface Preparation.
<br /> a. All vegetation In excess of four Inches in length and dead organic debris must be removed from
<br /> the surface of the total area selected for the mound, Including the area under the banks.
<br /> b. The total area selected for the mound, Including the dikes, shall be plowed to a depth of at least
<br /> eight (8) Inches. Furrows shall run perpendlcula[ to the direction of slopes. All furrows shall be
<br /> thrown uphill and there shall be no deadlurrow under the mound. The soil shall be plowed only
<br /> when the m0fsture content of a fragment eight (8) Inches below the surface Is below the plastic
<br /> limit.
<br /> c. In soils having percolation rates faster than fifteen (!5) minutes per Inch (sanely loams) in lhe
<br /> top eight (8) Inch depth, disking may be used for surface preparation as a substitute for plowing.
<br /> d. Mound construction shall proceed Immediately after surface preparation Is completed.
<br /> e. The original soil must nel be excavated or moved more than one foot from its original location
<br /> during soil surface preparation.
<br /> 13; A minimum of twelve (12) Inches of soil defined as sand shall be placed where the filter mate-
<br /> rial Is to be IDeated. A crawler tractor with a blade shall be used to move the sand Into place. At
<br /> least six (6) inches of sand shall be kept'under the tracks to minimize compaction of the plowed
<br /> layer, The sand layer uPon which the filter material Is placed shall be level.
<br /> 14. A depth of at least nine (9) Inches of filter material shall be placed over the bed area below the
<br />distribution pipe. ~
<br /> 15. Distribution of effluent over the filter material shall be one and one.fourth (1Va) inch diameter
<br />perforated pipe under pressure from a manifold.
<br /> 16. The quantity of effluent per pump dose shall be at least one hundred fifty (150) gallons per
<br />bedroom for dwellings. For other establishments, the dose shall bo et least twenty-five per cent
<br />(25%) of the estimated or measured dally sewage flow.
<br /> 17. At least two (2) inches of filter material shall be placed over the distribution pipes. The top of
<br />the filter material sh~ll be level in alt directions.
<br /> 18. Straw or marsh hay to an uncompacted depth four (4) Inches shall be pla~eq over the filter
<br />material.
<br /> 19. Construction vehicles shall not be allowed on the filter mMerlal until backfill Is placed.
<br /> 20. Sandy loam soil shall be placed on the filter material to a depth, of one (1) foot In the center of
<br />the mound and to a depth of slx (6) inches at the sides·
<br /> 21; A maximum of two (2) ten (10) foot wide beds may be installed side by side in a sir)glo moun~
<br />if the soil percolation rate IS between five (5) and sixty (60) minutes per Inch to a depth of at feast .
<br />twenty,four (24) Inches below~the sarldy layer: The beds shall h~ ~PaP~fed b~y rt~oU~; r~4*~ ~e~'t ~o~ clean
<br />sand. ' ' '
<br /> 22. When Iwo (2) beds are installed sldd by side, the sandy loam fill at the center of the mound
<br />shall.be eighteen (18) inches deep and six (6) Inches deep at the sides.
<br /> 23. Six (6) Ihches shall be placed on the fill material over the entire area of the mound.
<br /> 24. A grass cover shall be established over the entire area of the mound.
<br /> 25. No shrubs shall be planted on the top of the mound. Shrubs may be placed at the foot and side
<br />slopes of the mound,
<br /> 26. The side slopes on the mound shall be no steeper than th rea (3) to one (1).
<br /> 27. Whenever modnds are located on slopes, a diversion shall be constructed Immediately upslope
<br />from the mound to Intercept and direct runoff. ~
<br /> 28. A vertical inspection pipe at least 1-Va Inches in diameter must be Installed in each dralnfleld
<br />rock layer of every mound. The inspection pipe must have three-eighths Inch or larger perforations
<br />spaced vertically no more t.han six Inches apart. At least two perforations must be located in the
<br />rock layer. The. inspection pipe must extend to the bottom of the rock layer and must be capped
<br />flush with or above finished grade.'
<br /> 30. A pump must be used as specified In this Chapter (Refer to Dosing Devices for Pressure
<br />Distributions).
<br /> 150.01.4H - 2000 URBAN SERVICE AREA ALTERNATIVE
<br /> Subd. 1 - General .
<br />
<br />
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