Sand filter by 7r12TT

VIEWS: 75 PAGES: 31

									            version       Intermittent Sand Filter Design                                                     contact Troy Johnson at

                                    <2500 gpd
             11.7                                                                                             www.SepticResource.com
                                                                                                              for questions or comments


            Property Owner:                                                             Date:


            Site Address:                                                               PID:

            Comments:

            instructions:            = req'd input              = input or default               = calculated field      *** = installer info


1)             3      bedroom        Type         IV            Residential             System

2)            450     GPD design flow

3)            No      Garbage disposal or pumped to septic

4)    ***    1000 Gallon septic tank (minimum)                    Tank options:                 none
                  effluent filter & alarm req'd on all Sand filters
                                                                                                       2
5)           1.00 GPD/ft2 Soil Loading Rate                450 ft2 filter req'd, or              450 ft LUG minimum / oversize value


6)    ***    15.0 ft desired filter width, leads to a      30 ft filter length
                     (No maximum)       (tip: with 2x2 perf spacing, use 12'W x 42'L (max) for every 500 gallons of flow)
                                        (tip: with 3x3 perf spacing, use 8.4'W x 60'L (max) for every 500 gallons of flow)

7)    ***     3.0     ft lateral spacing         3.0    ft perforation spacing          (maximum 3 for both)

                                                                end feed         manifold connection

8)    ***      5      laterals           28    feet long         10.0 perfs / lateral             50   perfs total
                      (hint: # of laterals (#8), has to be a multiple of the # of zones (#11), controlled by filter width (#6))
                                                              (1/2 perf means the first perf starts at the middle feed manifold)

9)    ***    7/32 inch perfs at            1   feet residual head       gives    0.56 gpm flow rate per perforation

            for this perf size & spacing, & pipe size on line 19, max perfs/lateral =             14   , line #8 must be less -->    OK

10)           8.0     doses per day to entire filter ( 8 minimum)
              56      gallons per dose         (to the entire filter)

                      (code req's - residential: 1 cell & 1 zone, "Other": 1 cell - 2 zones,       minimum)
11)            1      zone(s)        # of zones selected is ok
12)            5      laterals per zone


13)          56.0 gallons per dose per zone                     (treatment volume)

14)            8      Total # of individual zone doses (cycles)
15)            0      number of distributing valves
16)            0      pump head loss due to distributing valve
17)            1      number of pumps          (residential: 1 pump/zone, "Other": 2 pumps/zone or distributing valve, minimum)
18)            8      doses (cycles) per pump
19)          1.25 inch diameter laterals (or smaller) will meet "5x pipe volume"
      ***    1.25 inch diameter laterals (or smaller) must be used to meet "4x pipe volume" requirement
             1.50 inch diameter laterals (or smaller) will meet "3x pipe volume"

20)   ***     30   feet of          2.0    inch supply line       leads to      5    gallons of drainback volume
                                                                                     ("top feed" to control the drainback)
21)          61.0 gallons TOTAL pump out volume (treatment + drainback)

22)           10   feet vertical lift from pump to sand filter, leads to a

23)   ***     28   GPM @             16    feet of head, Sand Filter Pump requirement
                   ( >50 gpm may require additional 3-6' head allowance for discharge assy)

24)   ***    1000 gal Dose tank (minimum)                          at 25.00 gpi
                   (tank size must accommodate 1 days design flow, from pump off to inlet invert)
                 Current value is 700 gallons, given tank size (#24), float setting (#26) and flow (#2) which is ->                  Ok

25)   ***                         Timed dosing of    2.2      min ON          (confirm pump rate with drawdown
                   (to deliver 66% of design flow) 4.51 hrs OFF               test and adjust as necessary)


26)           12   inches from bottom of tank to "redundant OFF" float, and/or to cover pump
27)   ***     14   inches from bottom of tank to "timer ON" float
              20   inches of Surge Capacity before hitting Hi Level Alarm, to accommodate time dosing
28)   ***     34   inches from bottom of tank to "Hi Level" float

29)          150   gallons reserve capacity (after High Level Alarm is activated)


30)         Overall Dimensions:             15.0    ft. wide by        30.0   ft. long Sand filter

31) *** Filter liner:  (bigger filters with many drain pipes will require extra liner)
          15.0 ft. by 30.0 ft. by          5   ft. deep requires a                     25            ft.   by       40   ft. liner
32) *** Distribution Rock Bed materials:
         15.0 ft. by 30.0 ft. by              9     inches total, plus 20% gives              15     yd3 or *1.4=   21   ton
33) *** Treatment washed sand:
                                                                                                       3
             15.0 ft. by     30.0 ft. by     24     inches total, plus 20% gives              40     yd or *1.4=    56   ton
34)   *** Drainage material:       (enough rock to cover drain pipes, 2"+ of pea gravel on top of rock. Together at least 12")
          Pea rock
             15.0 ft. by     30.0 ft. by      4     inches total, plus 20% gives              7      yd3 or *1.4=   10   ton
            Drainage rock    (extra for 1% slope to drain pipe or pump basin)
                                                                                                       3
             15.0 ft. by     30.0 ft. by      9     inches total, plus 20% gives              15     yd or *1.4=    21   ton


               2   drain pipes (1 per zone, or 1 per 20', 2 minimum)
               2   inspection pipes to bottom of drainage rock (1 per zone, 2 minimum)
               2   inspection pipes to bottom of distribution rock (1 per zone, 2 minimum)

             113   gallons per inch (approximate) of sand filter pump basin (includes drainage rock volume)
                      DISPERSAL:
                                                                                                       2
5)           1.00 GPD/ft2 Soil Loading Rate              450 ft2 bed req'd, or     450 ft LUG minimum
                  (must match soil boring log)
6)    ***    15.0 ft desired bed width,     leads to a 30.0 ft bed length
                      (25' maximum)
7     ***     3.0 ft lateral spacing      3.0 ft perforation spacing        (maximum 3 for both)
                                                       end feed      manifold connection
8)    ***      5      laterals         28.0 feet long             10.0 perfs / lateral          50 perfs total
                                                               (1/2 perf means the first perf starts at the middle feed manifold)
9)    ***    7/32 inch perfs at          1     feet residual head       gives    0.56 gpm flow rate per perforation
                                               ( If bed has > 1' of cover, increase residual head for cleanout req's)
            for this perf size & spacing, & pipe size on line 12, max perfs/lateral =         30   , line #8 must be less -->       OK


10)            4      doses per day            ( 4 minimum)
11)           113     gallons per dose         (treatment volume)

12)          1.50     inch diameter   laterals (or smaller) will meet "5x pipe volume"
      ***    2.00     inch diameter   laterals (or smaller) must be used to meet "4x pipe volume" requirement
             2.00     inch diameter   laterals (or smaller) will meet "3x pipe volume"
13)   ***     30      feet of           2.0 inch supply line        leads to    5 gallons of drainback volume
                                                                                    ("top feed" to control the drainback)
14)           118     gallons TOTAL pump out volume (treatment + drainback)
15)            10     feet vertical lift from pump to dispersal area, leads to a
16)   ***      28     GPM @              16 feet of head, Pump requirement
                      ( >50 gpm may require additional 3-6' head allowance for discharge assy)

17)   ***          pump basin to include rock void space, approximately        113 gpi
18)   ***     1.0     inch swing on Demand float,       or Timed dosing of     4.2 min ON      (confirm pump rate with drawdown
                                            (to deliver 66% of design flow)     9 hrs OFF      test and adjust as necessary)
                      (assuming bottom slope to pump basin results in 18" of rock depth at basin)
19)            10     inches from bottom of basin to "pump OFF" float, and/or to cover pump
20)   ***      11     inches from bottom of basin to "pump ON" float, or           10 inches to "timer ON" float
21)   ***      14     inches from bottom of basin to "Hi Level" float
22)           450     gallons reserve capacity (after High Level Alarm is activated)

23)           48      inches, or     4.00 ft. to Redox or other limiting condition     (This must match the soil boring log)
24)           36      inches, or     3.00 ft. of vertical separation required
                      leads to bottom of rock no more than:
25)   ***     12      inches, or      1.0 ft. Below existing grade         CRITICAL FOR FUTURE CERTIFICATIONS!!!

26)   ***      6      inches of rock below the pipe
               2      inches of rock to cover the pipe

27)         Overall Dimensions:                 15.0    ft. wide by     30.0   ft. long Pressure Bed

28)   *** Rock Bed materials:
              15      ft. by     30.0 ft. by      8    inches total, plus 20% gives           14   yd3 or *1.4=    20    ton

            I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws.

            Designer Signature                         Company                              License#              Date
         Sand Filter                   Installer Summary
 1000 gallon Septic tank (minimum)                 none

 1000 gallon Dose tank (minimum)                                at 25.00 gpi

  28 GPM @           16         ft. of head, Pump required
  2.2 minutes ON time &                  Confirm pump rate in the field!
 4.51 hours OFF time

  14    inches from bottom of tank to "Timer ON" float
  34    inches from bottom of tank to "Hi Level Alarm" float

  30    ft. of            2.0   inch supply line     with end feed       manifold connection

   5    laterals          1.25 inch diameter               28.0 feet long         3.0    ft lateral spacing

 7/32 inch perfs          3.0   ft perforation spacing

  Yes   Effluent filter & alarm
   5    clean out & valve box assembly

Sand Filter:
 15.0 ft. wide by         30.0 ft. Long

  25    ft by              40   ft. Liner
  15    yd3 or *1.4=       21   ton Dispersal rock
          3
  40    yd or *1.4=        56   ton treatment Washed Sand
          3
   7    yd or *1.4=        10   ton drainage Pea Rock
  15    yd3 or *1.4=       21   ton drainage Rock

Dispersal area:
 15.0 ft. wide by     30.0 ft. long pressure bed
Bottom of rock no more than:
   12 inches, or       1.0 ft. below existing grade

   6    inches of rock below the pipe
          3
  14    yd or * 1.4 =      20   ton of Rock bed

  28    GPM @              16   ft. of head pump required

  1.0   inch swing on basin float            or     4.2   minutes ON time &        9     hours OFF time

  10    inches from bottom of basin to "pump ON" float, or                  10   inches to "timer ON" float
  14    inches from bottom of basin to "hi level alarm" float

  30    ft. of     2.0   inch supply line with       end feed      manifold connection

   5    laterals          2.00 inch diameter        28.0 feet long        3.0    ft. lateral spacing

 7/32 inch perfs          3.0   ft. perforation spacing
450




1000        1000




 1.5 ft on lateral sides (1-2 req'd)




      5              10




1/8       2'          0     3/16       2'     0   7/32   2'      0   1/4   2'     0
1/8       2.5'        0     3/16       2.5'   0   7/32   2.5'    0   1/4   2.5'   0
1/8 3'                0     3/16       3'     0   7/32   3'     14   1/4   3'     0
  14 =                0                       0                 14                0




      5          5
450     500   500




2.44 dose inches
 1.5 ft on lateral sides (1-2 req'd)



      5          10


1/8       2'      0         3/16       2'     0   7/32   2'      0   1/4   2'     0
1/8       2.5'    0         3/16       2.5'   0   7/32   2.5'    0   1/4   2.5'   0
1/8       3'      0         3/16       3'     0   7/32   3'     30   1/4   3'     0


  30 =            0                           0                 30                0
24
                      INSPECTOR CHECKLIST - sand filter, does not include dispersal area
WELL setbacks:           20' to pressure tested sewer line (5 psi for 15 min)
                         50' to everything         100' to dispersal area with shallow well
PROPERTY LINES setback: 10' to everything
Road setback:            outer ditch, or 33' from center of township road, or 65' from center of cnty road
LAKE / BLUFF setback:    20' for bluff. Lakes: gen 50', rec 75', nat 150'. Protected wetland 50'.
Building setbacks:       10' for everything, 20' for dispersal area.
WATER LINE under pressure10' to bed,tank & sewer line.
                         setback:

Sewer line & baffle connection (no 90's, 3' between 45's, slope of 1/8"/ft, or 1" in 8', or 1' in 96'.
      (no depth req's, clean out every 100', Sch 40 D2665 or F891)
Septic tank and risers (water tight, insulated, proper depth, existing verified by pumping)
       mfg__________        1000 gallons            none
Riser over outlet, riser over inlet, 6"+ inspection pipe over any remaining baffles.

Yes   effluent filter & alarm

Dose tank risers and piping (water tight, insulated, proper depth, drainback)
      mfg__________          1000 gallons

dose pump __________            28   gpm        16    head     VERIFY PUMP CURVE       2.2 M on 4.51 H off

float setting drop  2.4 inches
       LABEL pump requirements and drawdown on riser or panel
Cam lock, weep hole, supply line access (no hard 90, pipes reachable from grade)

supply pipe sloped 1/8"+, supported by sch40 sleeve, and buried 6"+.

splice box / control panel / electrical connections

Filter dimensions               15       X     30.0


cover depth of 12"+                                   VERIFY

  5 laterals (1-2' from edge of rock)
1.25 inch pipe size (bigger is ok but do not exceed 4 times pipe volume)
 3.0 ft lateral spacing

7/32 inch perforations (smaller is ok)

 3.0 ft perforation spacing

Air inlet at end of laterals, and at top feed manifold.        VERIFY
clean outs (deep bed 2' of head) (no hard 90's)
4" inspection pipes as required, anchored                      VERIFY

Abandon existing system if necessary
monitoring plan and type
spersal area
                                                       Preliminary Evaluation Form
1. Contact Information

              Property Owner/Client:                                                                                                          Client Phone Number:

Mailing Address

    Site Address

      Parcel I.D.                                         Township #                                                Range #                                           W              Section

              Date                                   Township name                                        Legal Desc or Lat/Long

Evaluation for system type                New                                 Replacement                 Parcel dimensions

2. Flow Information
Client-Provided Information
Type(s) of use (all that apply )            Residential                Commercial                    Other Use (Specify)
                                                                                                                               2
No. of bedrooms* (if applicable)                      3                                              Unfinished space (ft )

No. of residents in home                    Adults                            Children               Teenagers                              Daycare
Existing flow measurements                  Yes (If Yes, attach readings)                         \ No

                                            Garbage Disposal                                        Water Softener*                      Iron Filter*
Water-using devices (check all that                                                                                                                Other (specify )
                                            Dishwasher                                              Sump Pump*
apply)
                                            Large Bathtub/Jacuzzi                                    High Efficiency Furnace*
                                            Laundry/Large Tub on 2nd Floor                          Hot Tub*                          * Clear water source

Water use concerns (check all that          Faucet/Toilet                     Multiple Loads of                                              Long-Term Prescription Meds
apply)
                                            In-Home Business                  No Lint Screen        Use of Anti-Bacterial Soap               Frequent Entertaining of Out-of-Town Guests

Any additional current or future uses on this parcel (specify )

Any non-sewage discharges to system (specify )
Sewage ejector or grinder pump in home                                        Yes                    No
I acknowledge the above is complete and accurate                                           (Client(s) signature and date)

Designer-determined Flow Information
A. Estimated Design Flow (gallons per day)                                           450
Anticipated waste strength                     Domestic                       High Strength                     Description:

3. Preliminary Site Information
B(1). Water supply well(s) within 100 ft of absorption area                         Yes                    No
Well(s) were located          Direct Observation            County Well Index Maps                Personal Communication                 MN Unique Well Id #:

Depth of well(s)                                                        ft                           Well casing depth(s)                                             ft             Source
B(2). Site within 200 ft of noncommunity transient supply well                                       Yes                       No                                                    Source
B(3). Site within a drinking water supply management area                                            Yes                       No                                                    Source
B(4). Location of all existing and proposed buildings and improvements on lot (see Site Evaluation map )
B(5). Buried water supply pipes within 50 ft of proposed system                                      Yes                       No
C. Location of all easements on lot (see Site Evaluation map )                                                       Source

D. Elevation of ordinary high water level (OWHL) - MN DNR (if adjacent to parcel )

E. Floodplain designation and flood elevation                                                                                                                         Source
F. Determine property lines (see Site Evaluation map )                           Survey                           Plat Map                        Other
Site located in a shoreland district/area                    Yes                          No
G. Distance of setbacks                     Property Lines                    OHWL                   Easements                      Water Supply Pipes                     Well(s)
                                            Other
H. Soil Survey Information (from web soil survey )                            Map                    Map Units on Parcel

                     List landforms                                                                                  Slope Range
Parent materials -check all that apply                                                               Landscape Position (check all that apply )
    Till       Outwash       Loess        Bedrock         Alluvium                                         Summit         Shoulder           Backslope          Footslope                Toeslope
           Colluvium         Lacustrine        Organic             Cut/Fill                            Depression         Stream             Terrace            Manmade                  Plain


4. Local Government Unit Information
Name of LGU                                                                                          LGU Contact
LGU-specific setbacks
LGU-specific design requirements
LGU-specific installation requirements
Preliminary Evaluation Form
                                                  Field Evaluation Form
1. Contact Information
          Property Owner/Client                                                                                                        Client Phone Number:
                        Site Address
           Date                                 Weather Conditions


2. Utility and Structure Information

Utility Locations Identified              Gopher State One Call #                                Any Private Utilities

Property Lines                            Determined and Approved By Client                                                  Client's Approval (initial)
                                          Determined But Not Approved
                                          Approximate
                                          Property Lines Surveyed

Locate and Verify (see Site Evaluation map )
                                          Existing Buildings          Improvements              Easements                   Setbacks


3. Site Information
                       Percent Slope                                                                  Slope Direction
                 Landscape Position                                                                        Slope Shape
                  Vegetation type(s)
         Evidence of cut, fill, compacted or disturbed areas           Yes                       No                         Locate Areas on Site Evaluation Map
                 Discuss the flooding or run-on potential of site


                         Identify benchmarks and elevations (Site Evaluation Map )
Proposed soil treatment area adequately protected                     Yes                       No


4. General Soils Information
Original soils                 Yes                   No
Type of observation            Soil Probe                   Soil Boring             Soil Pit*                            *Soil pit required if determining loading rate without perc test
Number of soil observations
Soil observations were conducted in the proposed system location                        Yes                      No

A soil observation was made within the most limiting area of the proposed system                           Yes                  No

Soil boring log forms completed and attached               Yes                     No

Percolation tests performed, forms completed and attached                    Yes                      No


5. Phase I. Reporting Information
             Depth to standing water                                inches                                               Anticipated construction issues
                        Flood elevation                             feet
                      Depth to bedrock                              inches
 Depth to periodically saturated soil               48              inches
           Maximum depth of system                                  inches
         Elevation at system bottom                                 feet                                    Differences between soil survey and field evaluation
                       Percolation rate                             min/inch
                           Loading rate             1.00            gpd/ft2
                   Contour loading rate                             gpd/ft
Site evaluation issues / comments
                                            Soil Observation #1                                                                                  Date

                                                                                                                                                Time

         Property Owner:                                                                                    Landscape position

             Site Address:                                                                                            Vegetation

   Soil parent materials        Outwash         Lacustrine       Loess                                 Location:                                               Slope%
  (Check all that apply)        Till        Alluvium     Bedrock         Organic
                                                                                           Soil survery map units                       Slope shape
                                                                         matter
                             Coarse                                                                                 I-------- Structure-----------I
Depth (in)   Texture         Frag. %   Matrix Color(s)       Mottle Color(s)       Redox Kind(s)    Indicator(s)    Shape           Grade               Consistence




 Comments
                Soil Observation 2 & 3                                                                                                           Date

                                                                                                                                                Time

         Property Owner:                                                                                    Landscape position

             Site Address:                                                                                            Vegetation

   Soil parent materials        Outwash         Lacustrine       Loess                                 Location:                                               Slope%
  (Check all that apply)        Till        Alluvium     Bedrock         Organic
                                                                         matter            Soil survery map units                       Slope shape

                             Coarse                                                                                 I-------- Structure-----------I
Depth (in)   Texture         Frag. %   Matrix Color(s)       Mottle Color(s)       Redox Kind(s)    Indicator(s)    Shape           Grade               Consistence




 Comments


Soil Bore #3                 Coarse                                                                                 I-------- Structure-----------I
Depth (in) Texture           Frag. %   Matrix Color(s)       Mottle Color(s)       Redox Kind(s)    Indicator(s)    Shape           Grade               Consistence




 Comments
Linear, Linear



Linear, Concave   Summit



Linear, Convex    Shoulder           Concentrations



Convex, Linear    Back/ Side Slope   Depletions
Convex, Convex    Foot Slope         Gleyed




Convex, Concave   Toe Slope          Concentrations, gleyed
S4, T4
S4, T5
S4, T6
Percolation Data Sheet
1. Contact Information
            Property Owner:
                 Site Address:

2. General Percolation Information

    Diameter                     in                          Date prepared and/or soaked:

             Method of scratching sidewall:

      Is pre-soak requiried*?                   * Not required in sandy soils

                                                     Soak* end
             Soak* start time:                                                                              hrs of soak
                                                         time:

             Method to maintain 12 in of water during soak

3. Percolation Test Data

                   Test hole:         #1                          Location:

          Date reading taken:                                     Elevation:

                Starting time:                                       Depth**:                inches

Soil texture description:
                 Depth (in)                Soil Texture                          ** 12 inches for mounds & at-grades,
                                                                                depth of absorption area for trenches &
                                                                                                  beds




                                                 Start Reading End Reading       Perc rate   % Difference
   Reading        Start Time      End Time                                                                      Pass
                                                      (in)         (in)            (mpi)     Last 3 Rates
      1                                                                                           NA             NA
      2                                                                                           NA             NA
      3




                                  Chosen Percolation Rate for Test Hole #1                   mpi

Additional percolation test data may be included on attached pages
Design Percolation Rate (maximum of all tests) =                                             mpi
Additional Percolation Data
Percolation Test Data
                   Test hole:      #2        Location:
          Date reading taken:                Elevation:
                Starting time:               Depth**:                     inches

Soil texture description:                                                  ** 12 in. for mounds & at-grades, depth
                 Depth (in)             Soil Texture                      of absorption area for trenches and beds




                                              Start Reading End Reading     Perc rate   % Difference
   Reading       Start Time      End Time                                                                 Pass
                                                   (in)         (in)          (mpi)     Last 3 Rates
      1                                                                                     NA             NA
      2                                                                                     NA             NA
      3




                 Chosen Percolation Rate for Test Hole #2                 mpi

Percolation Test Data
                   Test hole:      #3        Location:
          Date reading taken:                Elevation:
               Starting time:                Depth**:                     inches

Soil texture description:                                                  ** 12 in. for mounds & at-grades, depth
                 Depth (in)             Soil Texture                      of absorption area for trenches and beds




                                              Start Reading End Reading     Perc rate   % Difference
   Reading       Start Time      End Time                                                                 Pass
                                                   (in)         (in)          (mpi)     Last 3 Rates
      1                                                                                     NA             NA
      2                                                                                     NA             NA
      3




                 Chosen Percolation Rate for Test Hole #3                 mpi
Additional Percolation Data
Percolation Test Data
                   Test hole:      #4        Location:
          Date reading taken:                Elevation:
                Starting time:               Depth**:                     inches

Soil texture description:                                                  ** 12 in. for mounds & at-grades, depth
                 Depth (in)             Soil Texture                      of absorption area for trenches and beds




                                              Start Reading End Reading     Perc rate   % Difference
   Reading       Start Time      End Time                                                                 Pass
                                                   (in)         (in)          (mpi)     Last 3 Rates
      1                                                                                     NA             NA
      2                                                                                     NA             NA
      3




                 Chosen Percolation Rate for Test Hole #4                 mpi

Percolation Test Data
                   Test hole:      #5        Location:
          Date reading taken:                Elevation:
               Starting time:                Depth**:                     inches

Soil texture description:                                                  ** 12 in. for mounds & at-grades, depth
                 Depth (in)             Soil Texture                      of absorption area for trenches and beds




                                              Start Reading End Reading     Perc rate   % Difference
   Reading       Start Time      End Time                                                                 Pass
                                                   (in)         (in)          (mpi)     Last 3 Rates
      1                                                                                     NA             NA
      2                                                                                     NA             NA
      3




                 Chosen Percolation Rate for Test Hole #5                 mpi

								
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