007.04.09 Ark. Code R. § 001 - Rules and Regulations Pertaining to Drip Dispersal Systems

Current through Register Vol. 2022, No. 3, March, 2022

SECTION 1. Authority and Purpose
1.1 The following RULES AND REGULATIONS PERTAINING TO DRIP DISPERSAL SYSTEMS are duly adopted and promulgated by the Arkansas State Board of Health pursuant to the authority expressly conferred by the laws of the State of Arkansas including, without limitation. Act 96 of 1913 (A.C. A. { 20-7-109 }, and Act 402 of 1977 (A.C.A. { 14-236-101 } et. Seq.).
1.2 Purpose: A drip dispersal system is a technology for the distribution of treated wastewater uniformly over a large area beneath the soil surface. Drip Dispersal fields are a "bed" design. The use of four (4) to six (6) inch installation cover does not fit the conventional trench design criteria utilized in the Onsite Wastewater Soil Morphology Program for system design.
SECTION 2. Definitions
2.1 Aerobic Treatment Unit (ATU): A mechanical on-site treatment unit that provides secondary wastewater treatment by mixing air and aerobic and facultative microbes with the wastewater. ATU's typically use a suspended growth treatment process or a fixed treatment process.
2.2 Air/Vacuum (A/V) Relief Valve; A valve that automatically lets air out of or into liquid carrying pipe as needed in response to changes in system pressure.
2.3 Aerobic: Having molecular oxygen as a part of the environment, or growing or occurring only in the presence of molecular oxygen.
2.4 Backwash: The process of flow reversal to clean a filter and to restore it to the normal clean condition for filtering with a minimum resistance to flow through the media or screen.
2.5 Control Panel: An electronic control panel that controls the quantity and time of dose. This can also control the zone receiving the effluent, automatically flushes the lines, flushes the filters, monitors the flow rates and pump run cycles or times,
2.6 Decentralized System: An onsite and/or cluster wastewater system used to treat and disperse or discharge small volumes of wastewater, generally from dwellings or businesses that are located relatively close together.
2.7 Disk Filter: A type of filter that utilizes a series of grooved rings that overlay each other to form a network of very small openings to trap contaminants.
2.8 Distributing Valve: A valve that distributes flow to multiple drain field laterals, zones or locations by automatically rotating upon each pump cycle.
2.9 Drain-back: The process of effluent draining along the laterals and manifolds after the pump shuts off. Drainage occurs both inside and outside the drip tubing and manifolds to lower elevations in the drip field.
2.10 Drip Line: Tubing constructed from polyethylene with emitters embedded regularly along the length of the tube.
2.11 Effluent: Sewage, water or other liquids, partially or completely treated or in its natural state flowing out of a septic tank, aerobic treatment unit, or other treatment system or systems.
2.12 Emitters: Small diameter openings in drip line that can dissipate pressure and allow a slow, controlled discharge normally rated in gallons per hour.
2.13 Field Flush: Water is passed through the drip lateral for the purpose of removing particles and other debris from the walls of the drip tubing. The flush water is carried back through the return manifold and return line to the pretreatment unit.
2.14 Filter: A device for the main purpose of removing suspended solids and other debris from the wastewater.
2.15 Hydraulic Conductivity: The rate of water movement under unit gradient in a specific soil horizon.
2.16 Interceptor Drain: A subsurface drain line, usually constructed upgrade from the absorption area to divert seasonal groundwater.
2.17 Lateral: One single run or multiple runs of drip tubing connected atone end to a supply manifold and the other end connected to a return manifold.
2.18 Maintenance Personnel; An individual certified by the Department to conduct assessments under the Onsite Maintenance and Monitoring Program.
2.19 Monitoring: Periodic inspection of system for performance.
2.20 Pressure Compensating (pc) Emitters: Drip emitters that allow a constant flow or discharge over a wide range of applied pressure.
2.21 Pressure Distribution: A system of small diameter pipes equally distributing effluent through a trench or bed.
2.22 Pressure Regulator: A device used to regulate and maintain a constant discharge pressure.
2.23 Pretreatment: The conditioning of effluent prior to dispersal by a drip system.
2.24 Return Line: The return line connects the return manifold to the pretreatment unit for the purpose of carrying flush water from the drip field.
2.25 Return Manifold: A collection manifold or piping that returns excessive wastewater and debris to the primary treatment tank during system flushes.
2.26 Run: One continuous length of tubing routed across contour connected to a supply line or return line or another run.
2.27 Soil Structure: The combination or arrangement of individual soil particles in definable aggregates, or peds, which are characterized and classified on the basis of size, shape, and degree of distinctness.
2.28 Solenoid Valve: An electric valve actuated by a solenoid, used for controlling the flow or liquid in pipes.
2.29 Spin Filter: A filter that consist of a screen cylinder enclose in a casing. The typical filter screen mesh size is 150 and a micron rating of 100.
2.30 Static Plow: A drip line plow with a shank that remains at a given depth as the plow is pulled through the soil.
2.31 Supply Line: The line that extends from the pump to the supply manifold of a given zone.
2.32 Supply Manifold: The supply manifold connects the supply line to the drip laterals.
2.33 Vertical Separation: The depth of unsaturated, original, undisturbed soil between the bottom of the drip tubing and highest seasonal water table or restrictive layer.
2.34 Vibratory Plow: A vibratory plow is a drip line plow with a shank that vibrates vertically as the plow is pulled through the soil.
2.35 Water Table: The level in saturated soil at which the hydraulic pressure is zero.
2.36 Zone: A group of laterals that are dosed at the same time.
SECTION 3. Site Assessment
3.1 Subsurface Drip System(s) may be utilized on sites that meet the following criteria
3.1.1 The minimum vertical separation between the drip tubing or installed trench bottom and any rock substrata (consolidated or fractured) shall be nine (9) inches or greater of undisturbed, natural soil.
3.1. 2 The drip tubing or installed trench bottom shall be above the seasonal water table, whatever the duration. Brief seasonal water tables may be minimized or eliminated by the use of effective interceptor drains. Any design, which incorporates the use of an interceptor drain, shall indicate the effective depth of seasonal water table reduction.
3.1.3 The percent clay of a soil may be interpreted as a Seasonal Water Table Class Clay percentage, as it relates to seasonal water table interpretation, is sited in Section 8 of the Onsite Wastewater Regulations.
3.1.4 Soils that are structure less or with massive structure shall not be approved for onsite sub-surface treatment.
3.1.5 The iot size shall be of sufficient area to accommodate both the primary and secondary dispersal area. Both the primary and secondary dispersal area shall be sized according to the respective loading rates. If the lot can only support the primary dispersal field, a subsurface drip dispersal system shall not be installed. For lots three (3) acres or greater, the use of a surface discharge drip system may be considered. (See Surface Discharge Systems)
SECTION 4. Drip Tubing and Emitters
4.1 Emitter spacing can range from six (6) to twenty-four (24) inches. The emitters used in the tubing shall be pressure compensating. Pressure compensating emitters have a relatively constant discharge rate over a wide range of pressures. Emitter flow rate shall be specified by the designer and stated on the system plans. The drip line pressure can range from 5 to 70 pounds per square inch (PSI).
4.2 Drip tubing shall be installed by one of the following methods: static plow, chain trencher or vibratory plow.
4.3 Static plow is the preferred method for inserting drip tubing into the soil. The static plow shall be pulled not pushed through the soil.
4.4 Chain trencher may be used for placement of the drip tubing in the soil. The maximum chain trench width is four (4) inches.
4.5 Wet soil shall not be plowed because of smearing.
4.6 Drip tubing installed in natural soil shall be installed to a depth of six (6) inches.
4.7 If capping fill material is used as part or all of the cover over the tubing, the installed depth of the tubing can range from one (1) to five (5) inches in the natural soil. Drip tubing shall not be placed in the capping fill material, (n no case shall the cover over the tubing be less than six (6) inches.
4.8 Settled depth of the cap shall not be more than eight (8) inches. The capping fill material shall not contain more than 27% clay or 60% sand or 70% silt. Before the capping fill material is delivered to the proposed dispersal site, a textural analysis shall be provided. A credit of up to 50% of the settled cap depth may be allowed in the adjustment of the seasonal water table. The seasonal water table credit is at the sole discretion of the Department.
SECTION 5. Pretreatment Requirements
5.1 The quality of effluent that will be applied to the dispersal field shall meet the American National Standards Institute/National Sanitation Foundation (ANSI/NSF) Standard 40 (revised 2005) requirements for class 1 treatment systems. Only pretreatment units that have obtained approval from the Department shall be used.
5.2 Pretreatment system shall be required as part of any Drip Dispersal System design.
5.3 The daily flow rate capacity of a pretreatment system shall equal or exceed the daily flow rates found in Appendix A.
5.4 Pretreatment systems installed in conjunction with an individual residential structure shall have a daily flow rate capacity of not less than 400 gallon per day.
5.5 Pretreatment systems installation on non-residential or multi-structures shall be sized according to influent wastewater strength and total daily flow rate expressed in gallons per day.
SECTION 6. Filters and Screens
6.1 There are three types of filters or screens used for wastewater applications: spin or screen filter, disk, and sand.
6.2 Solids and other debris shall be filtered to a size of 100 microns or less.
6.3 Filter debris shall be returned to the septic tank, pretreatment unit, or a separate settling tank regardless of the type of filter system. The clear Schedule 40 PVC piping allows for a direct observation of the wastewater as it flows from the fijter flush line or the field flush line.
SECTION 7. Control Panel
7.1 Timed dosing is the only method for controlling the dose cycles and volumes.
7.2 Control panels shall be constructed of the following basic components: NEMA 4X rated enclosure, motor-start contractors, separate circuit breakers for pump and panel control, audio and visual alarms, and wiring terminals. Optional components range from elapsed time meter or counters, event counters and pump run lights.
SECTION 8. Flow Meters and Pressure Gauges
8.1 A flow meter shall be installed after the filter system but before the drip dispersal field. The flow meter shall incorporate not only a rate of flow gauge but also a total gallons pumped register. The flow rate gauge and total gallons pumped register may be separate devices. The flow meter shall be installed in a protective box that will be of sufficient size for servicing the meter and to allow easy access for reading the meter. The flow meter shall be sized for the dispersal flow as well as the additional field flushing volume.
8.2 Pressure gauges shall be located before the filter, after the filter and on the dispersal field return line. Pressure gauges shall be enclosed in the head works box, which allows easy access for observation. The gauges shall be liquid filled and a minimum of three (3) inches in diameter. The pressure range of the gauge shall be sufficient for the maximum pressure that will be expected in the system.
SECTION 9. Supply Line and Manifold
9.1 The supply line and manifold should be designed with a flow velocity between the 0.5 feet per and 5 feet per second.
9.2 The piping and fittings in the supply line and the manifold shall be Schedule 40. Schedule 80 fittings shall be used at the filter system as well as any point where the piping will be disconnected or subjected to abuse.
9.3 When dosing, the supply manifold shall eliminate the drain back potential from a higher to a lower elevation in the drain field.
SECTION 10. Return Manifold and Line
10.1 The return manifold and line allow the flushing of the drip dispersal field. The flushed wastewater and solids shall be returned back to the settling tank or treatment tank.
SECTION 11. Flexible Hose and Tubing
11.1 Flexible Schedule 40 PVC piping shall be used at all connections to the supply and return manifolds.
SECTION 12. Air/Vacuum Relief Valves
12.1 Air/vacuum relief valves provide a means for releasing air at the start of a dose cycle, so the system will charge quickly with wastewater and allow air to enter the system quickly at the end of dose cycle. Air/vacuum valves shall be located at the highest points of either supply or return manifolds, or both.
12.2 Air/vacuum relief valves shall be sized based on the proposed design flow rate. A valve that is under sized will not provide an adequate amount of airflow,
12.3 A Schrader valve shall be provided at each vacuum valve as a means of checking the pressure of the drip field.
SECTION 13. Flushing Valves
13.1 Automatic flushing controls shall be required for all drip systems. The flush valve shall be a solenoid type valve. Manual flushing valves may be installed in the field flush line. Manually operated valves may be standard ball or gate valves. The flush valve shall be fully opened during a flush cycle regardless of the valve type. The field flushing velocity shall be in accordance with the drip tubing or system manufacturer's recommendations. The minimum field flushing velocity shall not be less than 0.5 feet per second.
SECTION 14. Pipe and Specialty Connectors and Fittings Standard
14.1 PVC pipe, tubing, reducer tees, adapters, elbows, couplers and compression fittings shall be constructed of Schedule 40 PVC.
14.2 Lock-Slip fittings, adapters, tees, elbows, and couplings shall be specifically manufactured for use with wastewater drip dispersal systems.
14.3 Insert Fittings, barbed adapters, tees, elbows, and couplings shall be specifically manufactured and sized for use with wastewater drip dispersal system.
SECTION 15. Headworks Boxes
15.1 Any component or assembly that may need to be routinely serviced shall be located in a headworks box that is readily accessible.
15.2 Headworks boxes may be constructed of high-density PE (polyethylene) fiberglass, PVC, or concrete.
15.3 Headworks boxes shall be large enough to allow ease of service and allow periodic removal and replacement of components as needed. The headworks box shall be of sufficient length and depth to accommodate the various components that will be housed in the box. The lid of the headworks box shall extend above the finished grade. The bottom of the headworks box shall be designed to drain any rainwater or wastewater away from the inside of the box. The headworks box lid shall be easy to remove but also shall be made tamperproof where access to the site is not restricted or controlled. The structural strength of the headworks box and lid shall be sufficient to withstand the weight of any lawn maintenance equipment or other service equipment that may roll over the box. If the box will be subject to excessive wheel loading, additional protection shall be provided.
SECTION 16. Zones and Related Components
16.1 Automatic distributing valves shall include clear Schedule 40 piping on the output of each zone.
16.2 Check valves, shall not be required if separate return lines are used to isolate returned wastewater to the pretreatment system.
SECTION 17. Pressure Regulators
17.1 Regulators shall be selected to allow sufficient pressure and flows for flushing. Pressure regulators shall be designed for use in wastewater drip dispersal system.
SECTION 18. System Installation
18.1 Protect the site prior to and after the installation of the drip system. Activities on the site shall be limited only to what is necessary for the installation of the system.
18.2 Any clearing or grubbing shall be performed based on a site-specific plan, which minimizes the disturbance of the soil and protects the overall soil characteristics. It may be necessary to use flexible PVC tubing to work around or over objects in the dispersal field; however the number of emitters shall not be reduced.
18.3 Drip tubing shall not be installed when the soil is wet or frozen.
18.4 Drip tubing shall be installed on contour.
18.5 Flexible Schedule 40 PVC tubing shall be used at each manifold connection to provide additional crimping protection and to prevent the tubing from being pulled out of the supply or return manifold as the soil settles.
18.6 Drip tubing shall be taped, or plugged or capped when cut. All piping shall be taped or capped at the end of the construction day.
18.7 PVC pipe cutters that cleanly shear the pipe or tubing shall be used rather than sawing the pipe or tubing.
18.8 Complete flushing of the supply line prior to the connection of the drip tubing shall be performed. Sufficient volume of water shall be used to ensure all debris is removed from both the supply line and the drip tubing.
18.9 A start-up system check shall be performed before the system is placed in operation. All operational functions that would be expected during routine operations shall be performed in a specified time period of not less than 24 hours. This operational test shall include but not be limited to: timed dose functions, volume loading, flow rates, pressures at the inlet and outlet of each zone, pressures at the inlet and outlet of filters, leak detection, flushing, and alarms.
18.10 Repairs or modifications shall be made to eliminate any wet spot.
18.11 The establishment of a vegetative cover is critical to the overall performance of a drip dispersal system. The dispersal area shall be covered with sod or mulch as soon as possible after the installation of the drip tubing.
SECTION 19. System Operation and Maintenance
19.1 Periodic servicing shall be required. The frequency of the service period is dependent on the operational parameters set for the system by its designer. The minimal service period shall not be less than once every three (3) months.
19.2 Alarms resulting from mechanical break downs shall be investigated and the situation causing the alarm resolved.
19.3 Owners of Drip Dispersal Systems are required to maintain a Maintenance and Monitoring Contract with Maintenance Personnel certified by the Department for the life of the system.
SECTION 20. System Design
20.1 The following procedure shall be used to determine the minimum surface area required for drip dispersal system.
20.2 The depth and duration of the seasonal water table shall be determined.
20.3 The sizing or loading rate chart found in Table 1 of this manual shall be used to determine the amount of surface area required for installation.
20.4 The spacing between drip tube laterals shall not be less than two (2) ft. center to center. Drip tube laterals spacing may be greater than two (2) ft, however, for the purpose of determining the length of tubing required for a dispersal field, all length calculation shall be two (2) ft. center to center.
20.5 The effective area of the dispersal field shall be calculated by dividing the daily wastewater flow rate (DWF) in gallons per day (gpd).by the soil loading rate (SLR) in gallons per foot square per day (g/ft ft2/d). [Area of the dispersal field (DF) = design wastewater flow (DWF)t soil loading rate (SLR).]
20.6 The length of the drip tubing shall be determined by dividing the dispersal field (DF) required by the drip tube spacing (DT) of two (2) Ft. [Drip tube length (DTL = dispersal field area (DF) *** drip tube spacing (DT) of two (2) ft.]
20.7 The number of emitters required shall be determined by dividing the drip tube length (DTL) by the emitter spacing (E) ft. [Drip line lateral length (ft.) -r emitter spacing (ft.) = Number of emitters.]
20.8 The loading rate for a soil which has a rock substrata (consolidated or fractured) and no seasonal water tables present above the rock substrata shall be sized as a moderate seasonal water table.
SECTION 21. Training and Certification
21.1 All Designated Representatives, Installers, Environmental Health Specialists, and Certified Maintenance Personnel shall be certified in the design, construction and maintenance of a drip dispersal system. The certification program will be provided or approved by the Department Onsite Wastewater Section.
SECTION 22. Surface Discharge Drip System
22.1 Under certain conditions, Drip Dispersal Systems may be approved as a surface discharge system.
22.2 The requirements for surface discharge are:
22.2.1. The site is unsuited for a subsurface drip dispersal system.
22.2.2. Pre-treatment shall be a Class 1 treatment unit as approved by the Department. (See Section 5 Pretreatment Requirements)
22.2.3 Lot size shall not be less than three (3) acres. The lot size shall not include road or highway right of ways or utility easements.
22.2.4. A one hundred (100) foot setback from any property lines shall be maintained in all directions from the drip dispersal field.
22.2.5. A maximum loading rate of 0,09 gallons per square foot per day shall be utilized.
22.2.6. Ultraviolet light disinfection units shall be used as the primary method of disinfection. Ultraviolet light (UV) units shall be approved by the Department. UV units shall be installed and maintained in accordance with manufacturers recommended practices.
SECTION 23. Variances and Exemptions
23.1 Requested variations from these Rules and Regulations will be considered and may be approved at the sole discretion of the Department.
23.2 Submission of proposed experimental onsite wastewater systems may be approved, disapproved, or approved on a trial basis for a specific period of time. Such approval or disapproval shall be at the sole discretion of the Department. Submission of an experimental design shall include data as to the efficiency of operation of the proposed experimental system. A monitoring plan shall be submitted for approval in addition to the system design,
23.3 Good management practices are additions or modifications to systems which will make such systems more efficient, or which could make such systems acceptable in certain soil conditions. Where good management practices are proposed for inclusion in a drip dispersal system, approval shall be at the sole discretion of the Department or its Authorized Agent.
SECTION 24. Fees
24.1 A fee shall be levied for the review of individual drip dispersal system permit application pursuant to A. C. A. § 14-236-116.
24.2 For structures one thousand five hundred square feet (1,500 sq. ft.) or less, the fee to review a permit application is thirty dollars ($30.00).
24.3 For structures more than one thousand five hundred square feet (1,500 sq. ft.) and less than two thousand square feet (2,000 sq. ft.), the fee to review a permit application is forty-five dollars ($45.00).
24.4 For structures more than two thousand square feet (2,000 sq\ ft.) and less than three thousand square feet (3,000 sq. ft.), the fee to review a permit application is ninety dollars ($90.00).
24.5 For structures more than three thousand square feet (3,000 sq. ft.) and less than four thousand square feet (4,000 sq. ft.), the fee to review a permit application is one hundred twenty dollars ($120.00).
24.6 For structures four thousand (4,000 sq. ft.) and greater, the fee to review a permit application is one hundred fifty dollars ($150.00)
24.7 For the alteration, repair, or extension of any individual drip dispersal system, the fee to review a permit application is thirty dollars ($30.00).
24.8 In calculating the square footage of a residential structure for purposes of determining the applicable fee under this section the square footage of all auxiliary areas of the residential structure shall not be considered.
24.9 Auxiliary areas include garages, carports, porches, and other similar areas as determined by the Department.
24.10 Non-individual or multi structure permit submittals shall include a Cost Estimate Worksheet (EHP-17).
SECTION 25. Penalties
25.1 Any person, firm, corporation or association who violates any of the provisions of Act 402 of 1977, as Amended, or any Rules and Regulations promulgated under the authority of Act 402 of 1977, as Amended, shall upon conviction, be deemed guilty of a misdemeanor and shall be punished by a fine of not less than one hundred dollars ($100.00) nor more than one thousand dollars ($1,000.00)
SECTION 26. Severability
26.1 If any provisions of these Rules and Regulations, or the application thereof to any person is held invalid, such invalidity shall not affect other provisions or applications of these Rules and Regulations, which can effect without the invalid provisions of application, and to this end the provisions hereto are declared to be severable.
Section 27. Repeal
27.1 All Regulations and parts of Regulations in conflict herewith are hereby repealed.
SECTION 28. Certification

This is to certify that the foregoing Rules and Regulations for Mass Gatherings in Arkansas were adopted by the Arkansas State Board of Health at a regular session of said Board held in Little Rock, Arkansas on the 22nd day of April, 2010.

TABLE I

DRIP DISPERSAL FIELD SIZE

AND

SOIL LOADING RATES

Brief SWT

Mod SWT

Long SWT

Dept to

RMF

(g/ftVd)

FT2/100 Gal./Day

(g/ftVd)

. . FT2/100 Gal./Day

(g/ft2/d)

ft2/ioo

Gal./Day

i

0.021

4878.05

0.007

14634.1

0,003

29268.3

2

0.041

2439.02

0.014

7317.07

0,007

14634.1

3

0.062

1626.02

0.021

4878,05

0,010

9756.1

4

0.082

1219.51

0.027

3658.54

0.014

7317.07

5

0.103

975.61

0.034

2926.83

0.017

5853.66

6

0.123

813.008

0.041

2439.02

0.021

4878.05

7

0.144

696.864

0.048

2090.S9

0.024

4181.18

8

0.164

609.756

0.055

1829.27

0.027

3658.54

9

0.185

542.005

0.062

1626.02

0.031

3252.03

10

0.205

487.805

0.068

1463.41

0.034

2926.83

, 11

0.226

443.459

0.075

1330.38

0.038

2660.75

12

0.246

406.504

0,082

1219.51

0.041

2439.02

13

0.267

375.235

0.089

1125.7

0.044

2251.41

14

0.287

348.432

0.096

1045.3

0.048

2090.59

15

0.308

325.203

0.103

975.61

0.051

1951.22

16

0.328

304.878

0.109

914.634

0.055

1829.27

17

0.349

286.944

0.116

860.832

0.058

1721.66

18

0.369

271.003

0.123

813.008

0.062

1626.02

19

0.390

256,739

0.130

770.218

0.065

1540.44

20

0.410

243.902

0.137

731.707

0.068

1463.41

21

0.431

232.288

0.144

696.864

0.072

1393.73

22

0.451

221.729

0.150

665.188

0.075

1330.38

23

0.472

212.089

0.157

636.267

0.079

1272.53

24

0.492

203.252

0.164

609.756

0.082

1219.51

25

0.513

195.122

0.171

585.366

0.085

1170.73

26

0.533

187.617

0.178

562.852

0.089

1125.7

27

0.554

180.668

0.185

542.005

0.092

1084.01

28

0.574

174.216

0.191

522.648

0.096

1045.3

29

0.595

168.209

0.198

504.626

0.099

1009.25

30

0.615

162.602

0.205

487.805

0.103

975.61

31

0.636

157.356

0.212

472,069

0.106

944.138

32

0.656

152.439

0.219

457.317

0.109

914,634

33

0.677

147.82

0.226

443.459

0.113

886.918

34

0.697

143.472

0.232

430.416

0.116

860.832

35

0.718

139,373

0.239

418.118

0.120

836.237

36

0.738

135.501

0.246

406.504

0.123

813.008

37

0.759

131.839

0.253

395.517

0.126

791.035

38

0.779

128.37

0.260

385.109

0.130

770.218

39

0,800

125.078

0.267

375.235

0.133

750,469

40

0.820

121.951

0.273

365.854

0.137

731.707

41

0.841

118.977

0.280

356.93

0.140

713.861

42

0.861

116.144

0.287

348.432

0.144

696.864

43

0.882

113.443

0.294

340.329

0.147

680.658

44

0.902

110.865

0.301

332.594

0.150

665.188

45

0.935

106.952

0.308

325.203

0,154

650.407

46

0.943

106.045

0.314

318.134

0.157

636.267

47

0.964

103.788

0.321

311.365

0.161

622.73

48

0.984

101.626

0.328

304.878

0.164

609.756

APPENDIX A

-QUANTITIES OF WASTEWATER FLOW FOR VARIOUS TYPES OF ESTABLISHMENTS

ESTABLISHMENT TYPE

Airports, bus terminals, train stations

GALLONS PER DAY

Per passenger

5

Add per employee per 8 hour shift

20

Barber & beauty shops per chair

100

Bowling alleys

Toilet wastes per line

100

For food service, add restaurant usage below

Camps

Campground with central comfort stations per camper

35

Day camps (no meals served) per camper

15

Per non- resident camper

50

Per resident camper or employee

75

Churches

Per seat/no food service

5

For food service, add restaurant usage below

For daycares, add school usage below

Commercial establishments excluding deli, bakery, or meat department

Per 100 square feet of floor space

10

Add per 100 square feet of deli floor space

50

Add per 100 square feet of bakery floor space

50

Add per 100 square feet of meat market floor space

100

Country clubs

Per resident member

100

Per non-resident member present

25

Dentists offices

Per wet service chair

200

Add per non wet service chair

50

Doctors office

Per practitioner

250

Add per employee per 8 hour shift

20

Factories, exclusive of industrial waster

Gallons per employee per 8 hour shift

No showers provided

20

Showers provided

35

Hospitals

Per bed space

200

For food service excluding patients, add restaurant usage below

Hotels & Motels

Regular per room

150

Resort hotels & cottages

75

Add for establishments with self service laundry facility per machine

750

Institutions per meal served per day

65

Mobile home parks

Per single wide mobile home space

300

Per double wide mobile home space

450

Nursing homes, rest homes, adult congregate living facilities

Per bed

100

Add for food service (see Institutions, this chart)

Office buildings per employee per 8 hour shift

15

Parks, public picnic

Toilets only per person

5

With bath house, showers, & toilets per person

10

Recreation vehicle park

Recreational vehicle space for overnight stay,

Without water & sewer hookup per vehicle space

75

Recreational vehicle space for overnight stay,

With water & without sewer hookup per vehicle space

100

Recreational vehicle space for overnight stay

With water & sewer hookup per vehicle space

150

Restaurants

Per day per seat per meal setting

30

Using single service articles only per seat

25

Bar and cocktail lounge per seat

30

Carry out only

Per meal served without public restrooms

5

Per meal served with public restrooms

10

Add per employee per 8 hour shift

15

Residences

Single or multiple family per dwelling unit

I bedroom

150

2 bedroom

270

3 bedroom

370

4 bedroom

450

For each additional bedroom add

50

Rooming houses per occupant space

75

Schools per student

Day schools & day cares

15

Add for showers

10

Add for food service

5

Add for day school workers Boarding schools

20 75

Service stations & convenience stores

Per vehicle served

10

Food service, per meal served

5

Stadiums, race tracks, ball parks per seat

5

Swimming pools and bathhouses per patron

10

Theaters

Indoor, movies/auditorium per seat

5

Outdoor, drive-ins per space

10

Veterinary clinic

Per practitioner

250

Add per employee per 8 hour shift

20

Add per kennel, stall, or cage

20

FOOTNOTES:

The estimated flows for residential systems assume a maximum occupancy of 2 persons per bedroom. Where residential care facilities (non-institutional) will house more than 2 persons in any bedroom, estimated flows are to be increased by 75 gallons per each additional occupant.

Waste from food service operations is commercial in nature and may require special system sizing and treatment/disposal considerations. For food service operations, kitchen wastewater flows are normally to be calculated at 66% of the total wastewater flow. Estimated daily flow is based on 3 meals served per seat per meal setting.

Systems serving high volume establishments, such as fast food restaurants, convenience stores, and service stations require special sizing consideration due to above average wastewater volume expected from restroom facilities.

Notes

007.04.09 Ark. Code R. § 001
6/28/2010

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