Section 327IAC3-6-11. Design flow rate requirements for collection systems and water pollution treatment/control facilities

   (a) The flow rate requirements for collection systems and water pollution treatment/control facilities shall be in accordance with this section. The calculated average and peak flow rate values for a collection system and its associated water pollution treatment/control facilities shall be at least equal to the average and peak daily flow rate of the existing influent plus the flow from the proposed additional service connections calculated as follows:

(1) The flow rate requirements for the average daily flow rate for residential service connections may be determined by using a general average daily flow rate value. The following method shall be used to calculate average and peak flow rate values:

ADF = (General Avg) × PRSC

PDF = ADF × PF

Where:	ADF	=	Average daily flow rate expressed as gallons per residential service connection per day.
	PDF	=	Peak daily flow rate expressed as gallons per residential service connection per day.
General Avg		=	General average daily flow rate value in accordance in the following:
				200 gpd/unit for 1 bedroom apartment.
				300 gpd/unit for 2 bedroom apartment.
				310 gpd/unit for single-family homes.
	PRSC	=	Proposed number of residential service connections.
	PF	=	Peak daily factor of four (4).

(2) The flow rate requirements for the average and peak flow rate for service connections are described by Table 11-1 in subsection (b). The following method may be used to calculate the average and peak flow rate requirements:

ADF = FCF × PSC

PDF = ADF × PF

Where:	ADF	=	Average daily flow rate expressed as gallons per service connection per day.
	PDF	=	Peak daily flow rate expressed as gallons per service connection per day.
	FCF	=	Flow calculation factors as contained in Table 11-1 in subsection (b).
	PSC	=	Proposed number of service connections.
	PF	=	Peak daily factor of four (4).

(3) If the average and peak daily flow cannot be determined or calculated using the methods described in subdivision (1) or (2), the determination of the average and peak daily flow shall be presented and approved pursuant to section 32 of this rule.

  (b) The following flow calculation factors shall be used in the calculations under subsection(a)(2):

Table 11-1
Flow Calculation Factors (FCF)
Service Connection Description		FCF (gallons per day)
Agricultural labor camp		50 per occupant
Airport		3 per passenger plus 20 per employee
Assembly hall		3 per seat
Athletic field (baseball, soccer, football, etc.)		1 per participant and spectator with additions for concessions
Auction and flea market: with full kitchen		5 per customer
Auction and flea market: with warming kitchen		4 per customer
Auction and flea market: without kitchen		3 per customer
Automatic self-cleaning bathroom		20 per cycle (3 per day)
Banquet caterer		10 per person
Bar (without food)		10 per seat
Beauty salon: perm or color changes		35 per customer
Beauty salon: cut with wash		10 per customer
Beauty salon: cut without wash		5 per person
Bed and breakfast		150 per bedroom
Bowling alley (with bar and/or food)		125 per lane
Bowling alley (without food)		75 per lane
Bus station		3 per passenger
Campground (organizational) with flush toilets, showers, central kitchen		40 per camper
Campground (organizational) without flush toilets, privy use, central dining hall, no showers, handwashing		20 per camper
Campground (recreational) with individual sewer connection		100 per campsite
Campground (recreational) without individual sewer connection		50 per campsite
Church with full kitchen		5 per sanctuary seat
Church with warming kitchen		4 per sanctuary seat
Church without kitchen		3 per sanctuary seat
Condominium, multi-family dwelling: one bedroom		200 per unit
Condominium, multi-family dwelling: two bedroom		300 per unit
Condominium, multi-family dwelling: three bedroom		350 per unit
Condominium, one and two family dwelling		150 per bedroom
Conferences		10 per attendee
Correctional facilities		120 per inmate
Day care center		20 per person
Dentist		200 per chair plus 75 per employee
Doctor's office		75 per doctor, plus 75 per nurse, plus 20 per support staff
Factory with showers		35 per employee
Factory without showers		20 per employee
Fire station: manned		75 per firefighter
Fire station: unmanned		35 per firefighter
Food service operations: cocktail lounge or tavern		35 per seat
Food service operations: restaurant (not open 24 hours)		35 per seat
Food service operations: restaurant (open 24 hours)		50 per seat
Food service operations: restaurant (not open 24 hours but located along an interstate)		50 per seat
Food service operations: restaurant (open 24 hours and located along an interstate)		70 per seat
Food service operations: tavern		35 per seat
Food service operations: curb service (drive-in)		50 per car space
Golf comfort station		3 per 50% of maximum number of golfers
Golf main clubhouse		5 per golfer with additions for food service and showers
Hospital, medical facility		200 per bed
Hotel		100 per room
Kennels and vet clinics (sum of all of the following services at a facility):
1)	a. cages;	5 per cage 10 per run
	b. inside runs;
	c. outside runs;	20 per run
	d. grooming;	10 per animal
	e. surgery; plus	50 per surgery room
2) staff		75 per veterinary doctor, plus 75 per veterinary assistant, plus 20 per support staff
Mental health facility		100 per patient
Mobile home park		200 per lot
Motel		100 per room
Nursing home		100 per bed
Office building without showers		20 per employee
Office building with showers		35 per employee
Outpatient surgical center		50 per patient
Picnic area		5 per visitor
Race tracks		5 per attendee, 20 per staff
School: elementary		15 per pupil
School: secondary		25 per pupil
School with dormitory		100 per bed
Service station: convenience store/service center		1,000 with additions for food preparation and seating
Service station with only two (2) restrooms		400 per restroom
Service station with only unisex restroom		600 per restroom
Service station: automatic self-cleaning bathroom		60 per day
Shopping center		0.1 per square foot of floor space, plus 20 per employee
Swimming pool bathhouse		10 per swimmer
Theater: drive-in		5 per car space
Theater: inside building		5 per seat

(Water Pollution Control Division; 327 IAC 3-6-11; filed May 17, 1999, 12:11 p.m.: 22 IR 3090; errata filed May 20, 1999, 6:36 p.m.: 22 IR 3108; readopted filed Apr 11, 2005, 2:45 p.m.: 28 IR 2470; readopted filed Jun 15, 2011, 11:15 a.m.: 20110713-IR-327110193BFA)