R317-4-13. Tables

TABLE 1.1

Minimum Lot Size (a) by Soil Type and Culinary Water Source

Soil Type Public Water Supply Non-public Water Supply (b)

1 12,000 sq. ft. 1 Acre

2 15,000 sq. ft. 1.25 Acres

3 18,000 sq. ft. 1.5 Acres

4 20,000 sq. ft. 1.75 Acres

5 (c) 20,000 sq. ft. (c) 1.75 Acres (c)

TABLE 1.2

Soil Type Key (d)

Soil Soil Texture (e) Soil Structure Percolation

Type Rate (minutes

                                                per inch)

1 Coarse Sand, Sand, Single Grain 1-10

      Loamy Coarse Sand,

      Loamy Sand

2 Fine Sand, Single Grain 11-20

      Very Fine Sand,

      Loamy Fine Sand,

      Loamy Very Fine Sand

3 Coarse Sandy Loam, Prismatic, 21-40

      Sandy Loam Blocky, Granular

4 Coarse Sandy Loam, Massive, Platy 41-60

      Sandy Loam

      Fine Sandy Loam, Prismatic,

      Very Fine Sandy Loam, Blocky, Granular

      Loam, Silt Loam

5 Fine Sandy Loam, Massive, Platy 61-120

      Very Fine Sandy Loam,

      Loam, Silt Loam,

      Sandy Clay Loam, Massive

      Clay Loam, Silty

      Clay Loam

      Sandy Clay Loam, Prismatic,

      Clay Loam, Silty Clay Blocky, Granular

      Loam, Sandy Clay,

      Clay, Silty Clay, Silt

6 (f) Sandy Clay Loam, Platy >120

      Clay Loam,

      Silty Clay Loam

      Sandy Clay, Clay, Massive, Platy

      Silty Clay, Silt

NOTES

(a) Excluding public streets and alleys or other public

  rights-of-way, lands or any portion thereof abutting on,

  running through or within a building lot for a single-

  family dwelling. These minimum lot size requirements do

  not apply to building lots that have received final local

  health department approval prior to the adoption of

  this rule.

     Lots that are part of subdivisions that have received

  final local health department approval prior to the

  adoption of this rule are only exempt from the minimum

  lot size requirements if the developer has and is

  proceeding with reasonable diligence. Notwithstanding

  this grandfather provision for approved lots, the

  minimum lot size requirements are applicable if

  compelling or countervailing public health interests

  would necessitate application of these more stringent

  requirements. The shape of the lot shall also be

  acceptable to the regulatory authority.

(b) See the separation requirements in Section R317-4-13

  Table 2.

(c) Packed bed media systems are required for this soil

  type.

(d) When there is a substantial discrepancy between the

  percolation rate and the soil classification, it shall

  be resolved to the satisfaction of the regulatory

  authority, or the soil type requiring the largest lot

  shall be used.

(e) See the USDA soil classification system for a more

  detailed description.

(f) These soils are unsuitable for any absorption system.

TABLE 2

Minimum Separation Distances in Feet (a)

Item Requiring From Building From Septic, From

Setback Sewers and Pump, and Absorption

                     Effluent Other Area and

                     Sewers Tanks Replacement

                                                 Area

Absorption and 5 (b)

 Replacement Areas

Public Culinary (c) 100 (c) 100 (c)

 Water Sources

Individual or 25 50 100 (e)

 Non-public

 Culinary Water

 Sources (d)

Culinary Water (f) 10 (f) 10 (f)

 Supply Line

Non-culinary Well 10 25 100

 or Spring

Lake, Pond, 10 25 100

 Reservoir (a)

Watercourse (live or 25 100 (g)

 ephemeral stream,

 river, subsurface

 drain, canal, storm water

 drainage systems,

 etc.)

Building Foundation

 Without foundation 5 5 (h)

   drain

 With foundation 10 100 (i)

   drain

Curtain drains 10 10 100 (i)

Dry washes, gulches, 25 50

 and gullies

Swimming pool, 3 10 25

 below ground

Dry wells, catch 5 25

 basins

Down slopes that 10 50 (j)

 exceed 35%. This

 includes all

 natural slopes or

 escarpments and any

 manmade cuts,

 retaining walls,

 or embankments.

Property line 5 5 5

NOTES

(a) All distances are from edge to edge. Where surface

  waters are involved, the distance shall be measured from

  the high water line.

(b) See Subsection R317-4-6.14 for setback requirements.

(c) All distances shall be consistent with Rules R309-600

  and R309-605.

(d) Compliance with separation requirements does not

  guarantee acceptable water quality in every instance.

  Where geological or other conditions warrant, greater

  distances may be required by the regulatory authority.

(e) For ungrouted wells and springs the distance shall be

  200 feet. A private or individual well is considered to

  be grouted if it meets the construction standards

  required in Section R655-4-11, which requires a minimum

  30-foot deep grout surface seal. Private or individual

  wells not constructed to this minimum standard are

  considered to be ungrouted. Although this distance

  shall be generally adhered to as the minimum required

  separation distance, exceptions maybe approved by the

  regulatory authority, taking into account geology,

  hydrology, topography, existing land use agreements,

  consideration of the drinking water source protection

  requirements, protection of public health and potential

  for pollution of water source. Any person proposing

  to locate an absorption system closer than 200 feet

  to an individual or nonpublic ungrouted well or

  spring must submit a report to the regulatory authority

  that considers the above items. In no case shall

  the regulatory authority grant approval for an onsite

  wastewater system to be closer than 100 feet from an

  ungrouted well or a spring.

(f) If the water supply line is for a public water supply,

  the separation distance shall comply with the requirements

  of Rule R309-550. No culinary water service line shall

  pass through any portion of an absorption area.

(g) Lining or enclosing watercourses with an acceptable

  impervious material may permit a reduction in the

  separation requirement. In situations where the bottom of

  a canal or watercourse is at a higher elevation than the

  ground in which the absorption system is to be installed,

  a reduction in the distance requirement may be justified,

  but each case shall be decided on its own merits by the

  regulatory authority.

(h) Horizontal setback between a deep wall trench or

  seepage pit and a foundation of any building is at least

  20 feet.

(i) The regulatory authority may reduce the separation

  distance, if it can be shown that the effluent will not

  enter the drain, but each case must be decided on its own

  merits by the regulatory authority. In no case shall the

  regulatory authority grant approval for an absorption area

  to be closer than 20 feet.

(j) This setback may be reduced if a 53 foot reference line

  originating at the bottom of the distribution pipe, sloped

  at 35% below horizontal, will not daylight or intersect

  the ground surface.

TABLE 3

Estimated Flow Rates of Wastewater (a)

Type of Establishment Gallons per Day

Airports

a. per passenger 3

b. per employee 15

Boarding and Rooming Houses

a. for each resident boarder and employee 50 per person

b. additional for each nonresident boarder 10 per person

Bowling Alleys, not including 85 per alley

   food service

Camps

a. developed with flush toilets and showers 30 per person

b. developed with flush toilets 20 per person

c. developed with no flush toilets 5 per person

Churches, per person 5

Condominiums, Multiple Family Dwellings, 150 per bedroom

   or Apartments

Dentist's Office

a. per chair 200

b. per staff member 35

Doctor's Office

a. per patient 10

b. per staff member 35

Fairgrounds 1 per person

Fire Stations

a. with full-time employees and 70 per person

   food preparation

b. with no full-time employees and 5 per person

   no food preparation

Food Service Establishment (b)

a. ordinary restaurants, not 24 hour service 35 per seat

b. 24 hour service 50 per seat

c. single service customer utensils only 2 per customer

d. or, per customer served, includes 10

   toilet and Kitchen wastes

Gyms

a. participant and staff member 25 per person

b. spectator 4 per person

Hairdresser, per chair 65

Highway Rest Stops, improved with 5 per vehicle

   restroom facilities

Hospitals 250 per

                                                 bed space

Hotels, Motels, and Resorts 125 per unit

Industrial Buildings, exclusive of

   industrial waste

a. with showers, per 8 hour shift 35 per person

b. with no showers, per 8 hour shift 15 per person

Labor or Construction Camps 50 per person

Launderette 580 per washer

Mobile Home Parks 400 per unit

Movie Theaters

a. auditorium 5 per seat

b. drive-in 10 per

                                                 car space

Nursing Homes 200 per

                                                 bed space

Office Buildings and Business 15 per

   Establishments, not including employee

   food service, per eight hour shift

Picnic Parks, toilet wastes only 5 per person

Recreational Vehicle Parks

a. temporary or transient with no 50 per space

   sewer connections

b. temporary or transient with 125 per space

   sewer connections

Recreational Vehicle Dump Station, 50

   per self-contained vehicle

Schools

a. boarding 75 per person

b. day, without cafeteria, 15 per person

   gymnasiums or showers

c. day, with cafeteria, 20 per person

   but no gymnasiums and showers

d. day, with cafeteria, 25 per person

   gymnasium and showers

Service Stations, per day, per pump 250

Skating Rink, Dance Halls, Ski Areas, etc. 10 per person

Stores, including Convenience Stores

a. per public toilet room 500

b. per employee 11

Swimming Pools and Bathhouses, Using 10 per person

   Maximum Bather Load

Taverns, Bars, Cocktail lounges 20 per seat

   with No Food Service

Visitor Centers 5 per visitor

NOTES

(a) When more than one use will occur, the multiple use

  shall be considered in determining total flow. Small

  industrial plants maintaining a cafeteria or showers and

  club houses or motels maintaining swimming pools or

  laundries are typical examples of multiple uses. Uses

  other than those listed above shall be considered in

  relation to established flows from known or similar

  installations.

(b) No commercial food waste disposal unit shall be

  connected to an onsite wastewater system unless first

  approved by the regulatory authority.

TABLE 4

Minimum Standards for Building Sewer, Effluent Sewer,

and Distribution Pipe Materials (a)

Acceptable Building Sewer and Effluent Sewer Materials

Type of Pipe Minimum Standard

Acrylonitrile-Butadiene Styrene ASTM (b) D-2680 (c), D-2751,

(ABS) F-628

Polyvinyl Chloride (PVC) ASTM D-2665, D-3033, D-3034

Acceptable Distribution Pipe Materials

Type of Pipe Minimum Standard

ABS ASTM D-2661, D-2751

Polyethylene (PE), Smooth Wall ASTM D-3350

PVC ASTM D-2665, D-3033, D-3034,

                                 D-2729 (d)

NOTES

(a) Each length of building sewer, effluent sewer, and

  distribution pipe shall be stamped or marked.

(b) American Society for Testing and Materials.

(c) For domestic wastewater only, free from industrial

  wastes.

(d) Although perforated PVC, ASTM D-2729 is approved for

  absorption system application, the solid-wall version of

  this pipe is not approved for any application.

TABLE 5

Maximum Hydraulic Loading Rates for Percolation Testing

Percolation Rate Absorption Systems Absorption Beds

 (Minutes per Inch) Hydraulic Loading and Mound Systems

                           Rates (a) Hydraulic Loading

                         (gal/ft²/day) Rates (b)

                           (c)(d)(e) (gal/ft²/day)

                                               (c)(d)(f)

0-10 (g) 0.90 0.45

11-20 0.70 0.35

21-30 0.60 0.3

31-40 0.55 0.27

41-50 0.50 0.25 (h)

51-60 0.45 0.22 (h)

61-90 (i) 0.40 (j)

91-120 (i) 0.35 (j)

NOTES

(a) The following formula may be used in place of the

  values in this table: q = 2.35 divided by the square root

  of the percolation rate and then add 0.15 where q is the

  hydraulic loading rate. In no case shall the loading

  rate be greater than 1.0.

(b) The following formula may be used in place of the

  values in this table: q = 1.2 divided by the square root

  of the percolation rate and then add 0.08 where q is the

  hydraulic loading rate. In no case shall the loading

  rate be greater than 0.5.

(c) Minimum absorption area is equal to the actual or

  estimated wastewater flow in gallons per day shown in

  Section R317-4-13 Table 3, divided by the hydraulic loading

  rate within the applicable percolation rate category.

(d) For non-residential facilities, if a garbage grinder

  is not used, the absorption area may be reduced by 10% (0.9

  multiplier). If any automatic sequence washer is not used,

  the absorption area may be reduced by 30% (0.7 multiplier).

  If both of these appliances are not used, the absorption

  area may be reduced by 40% (0.6 multiplier).

(e) For non-residential facilities, a minimum of 150 square

  feet of trench bottom or sidewall absorption area shall be

  provided.

(f) For non-residential facilities, a minimum of 300 square

  feet of absorption area shall be provided.

(g) Soils with a percolation rate faster than 1 minute per

  inch are only acceptable with the use of an alternative

  packed bed media system with a disinfection unit.

(h) Not suitable for absorption beds.

(i) Acceptable for alternative packed bed media systems

  only.

(j) Not suitable for absorption beds or mounds.

TABLE 6

Maximum Hydraulic Loading Rates for Soil Classification

Texture Structure Absorption Systems Absorption Beds

                          Hydraulic Loading and Mound

                         Rate (gal/ft²/day) Systems

                             (a)(b)(c) Hydraulic

                                              Loading Rate

                                              (gal/ft²/day)

                                                (a)(b)(d)

Coarse sand, Single 0.9 (e) 0.45 (e

 sand, loamy grain

 coarse sand,

 loamy sand

Fine sand, Single 0.7 0.35

 very fine grain

 sand, loamy

 fine sand,

 loamy very

 fine sand

Coarse sandy Massive 0.45 0.22 (f)

 loam, sandy Platy 0.5 0.25 (f)

 loam Prismatic, 0.65 0.32

               blocky,

               granular

Fine sandy Massive 0.4 (g)

 loam, very Platy 0.35 (g)

 fine sandy Prismatic, 0.5 0.25 (f)

 loam blocky,

               granular

Loam Massive 0.4 (g)

              Platy (e) (g)

              Prismatic, 0.5 0.25 (f)

               blocky,

               granular

Silt loam Massive (e) (g)

              Platy (e) (g)

              Prismatic, 0.45 0.22 (f)

               blocky,

               granular

Sandy clay Massive (e)(h) (g)

 loam, clay Platy (i) (i)

 loam, silty Prismatic, clay loam blocky, 0.4 (e)(h) (g)

               granular

Silt, silty Massive (i) (i)

 clay, sandy Platy (i) (i)

 clay, clay Prismatic, 0.35 (e)(h) (g)

               blocky,

               granular

NOTES

(a) Minimum absorption area is equal to the actual or

  estimated wastewater flow in gallons per day, using Section

  R317-4-13 Table 3, divided by the hydraulic loading rate

  within the applicable soil texture and structure category.

(b) For non-residential facilities, if a garbage grinder is

  not used, the absorption area may be reduced by 10% (0.9

  multiplier). If any automatic sequence washer is not used,

  the absorption area may be reduced by 30% (0.7

  multiplier). If both of these appliances are not used,

  the absorption area may be reduced by 40% (0.6

  multiplier).

(c) For non-residential facilities, a minimum of 150 square

  feet of trench bottom or sidewall absorption area shall be

  provided.

(d) For non-residential facilities, a minimum of 300 square

  feet of absorption area shall be provided.

(e) These soils

  are usually considered unsuitable for

  absorption systems, but may be suitable, depending upon the

  percentage and type of fines in coarse grained porous

  soils, and the percentage of sand and structure in fine

  grained soils. Percolation testing shall be used for

  further evaluation.

(f) Not suitable for absorption beds.

(g) Not suitable for absorption beds or mounds.

(h) These soils may be permissible for packed bed media

  absorption systems only.

(i) These soils are unsuitable for any absorption system.

  TABLE 7: Minimum Inspection Frequency, Components, and Effluent Sampling Parameters

TABLE 7.1

Minimum Inspection Frequency (a)

Type of System Annual Semi-annual

Pressure Distribution X

At-Grade (first 5 years only) X

Mound X

Packed Bed Media X

Sand Lined Trench X

Holding Tank X

Experimental System X

NOTES (a) Or more frequently as directed by the regulatory

  authority.

TABLE 7.2

Components (a)

Type of Septic Distribu- Pumps, Pressure Disin-

System Tank and tion or Float Laterals, fection

             Other Drop Boxes Settings, Absorption Unit (c)

             Tanks (if acces- Control Area

                       sible) Panel

Pressure X X X

  Distri-

  bution

At-Grade X X X X

Mound X X X

Packed Bed X X X X X

  Media

Sand Lined X X X

  Trench

Holding X X

  Tank (b)

Experimental X X X X

NOTES

(a) Inspect other components as directed by the regulatory

  authority.

(b) Including pumping records.

(c) Required for absorption systems installed in

  excessively permeable soils, or as directed by the

  regulatory authority.

TABLE 7.3

Effluent Sampling Parameters

Packed Bed Media System Routine Sampling Parameters

Must sample Turbidity, or BOD5 and TSS.

Field Testing Laboratory Testing

Turbidity BOD5 TSS COD (a) E. coli

=<20 NTU =<25 mg/l =<25 mg/l =<75 mg/l <126/100 ml

                                                      (b)

NOTES

(a) Chemical oxygen demand (COD) may be used in place of

  BOD5.(b) E. coli testing required when a disinfection unit is

  installed.