327 IAC 8-3.3-2 Calculation of public water system quantity requirement standards for average and peak demand conditions

Sec. 2. (a) The calculated average and peak flowrate values required for a water main extension to a public water system shall be equal to the average and peak daily consumer demands of the proposed additional service connections calculated as follows: (1) The public water supply quantity requirement for the average daily consumer demand for residential service connections shall be determined by using a general average daily demand value. The following method shall be used to calculate average and peak supply quantity requirements: ADCD = (General Avg) × PRSC PDCD = (ADCD × PF) + FF Where: ADCD = Average daily consumer demand in gallons per residential service connection per day. PDCD = Peak daily consumer demand in gallons per residential service connection per day. General Avg = General average daily consumer demand value of five hundred (500) gallons per residential service connection per day. PRSC = Proposed number of residential service connections. PF = Peak daily consumer demand factor of two and one-half (2.5). FF = Fire flow demand value equal to the fire protection flowrate provided by the public water system or zero (0) if the public water system is not providing fire protection. (2) The public water supply quantity requirement for the average and peak daily consumer demand for residential service connections may be determined from the monthly reports of operations (MROs) as follows: (A) The following method may be used to calculate average and peak supply quantity requirements for a public water system that has been in operation for at least ten (10) years and has an accurate record of MROs for that time period: ADCD = (Max Average) × PRSC PDCD = (ADCD × PF) + FF Where: ADCD = Average daily consumer demand in gallons per residential service connection per day. PDCD = Peak daily consumer demand in gallons per residential service connection per day. Max Average = Maximum average daily consumer demand in gallons per service connection as calculated by: Max Average = (ADCD10) ÷ (SC10) Where: ADCD10 = The highest average daily demand as reported on the MROs over the previous ten (10) year period. SC10 0 The number of service connections at ADCD10. PRSC = Proposed number of residential service connections. PF = Peak daily demand factor as calculated by the following: PF = MDD10 ÷ 10YADD Where: MDD10 0 The maximum single day demand as reported on the MROs over the previous ten (10) year period. 10YADD = The ten (10) year average daily demand as calculated from the previous ten (10) year period. FF = Fire flow demand value equal to the fire protection flowrate provided by the public water system or zero (0) if the public water system is not providing fire protection. (B) If a public water service has not been in operation for at least ten (10) years, then all available MROs shall be used to determine the highest average daily demand (ADCD10), the number of service connections at ADCD10 (SC10), the maximum single day demand (MDD10), and the ten (10) year average daily demand (10YADD). (3) The public water supply quantity requirement for the average and peak daily consumer demand for service connections described by Table 2-1 in subsection (b). The following method may be used to calculate the average and peak public water supply quantity requirements: ADCD = DCF × PSC PDCD = (ADCD × PF) + FF Where: ADCD = Average daily consumer demand in gallons per service connection per day. PDCD = Peak daily consumer demand in gallons per service connection per day. DCF = Demand calculation factors as contained in Table 2-1 in subsection (b). = Proposed number of service connections. PF = Peak daily consumer demand factor of two and one-half (2.5). FF = Fire flow demand value equal to the fire protection flowrate provided by the public water system or zero (0) if the public water system is not providing fire protection. (4) If the average and peak daily consumer demand cannot be determined or calculated using the methods described in subdivision (1), (2), or (3), the determination of the average and peak daily consumer demand must be approved by the commissioner. The source and any calculations or assumptions must be approved by the commissioner. (b) The following demand calculation factors shall be used in the calculations under subsection(a)(3): Table 2-1 Demand Calculation Factors (DCF) Service Connection Description DCF (gallons per day) Airport 3 per passenger plus 20 per employee Assembly Hall 3 per seat Bar (without Food Service) 10 per seat Beauty Salon 35 per customer Bowling Alley (with Bar and/or Food) 125 per lane Bowling Alley (without Food Service) 75 per lane Bus Station 3 per passenger Campground Organizational with Flush Toilets 40 per camper Campground Organizational without Flush Toilets 20 per camper Campground Recreational with Individual Sewer Connection 100 per campsite Campground Recreational without Individual Sewer Connection 50 per campsite Church with Kitchen 5 per sanctuary seat Church without Kitchen 3 per sanctuary seat Correctional Facilities 120 per inmate Day Care Center 20 per person Dentist 750 per chair plus 75 per employee Factory with Showers 35 per employee Factory without Showers 20 per employee Food Service Operations Cocktail Lounge 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, 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 Hospital, Medical Facility 200 per bed Hotel 100 per room Kennel 20 per animal enclosure Mental Health Facility 100 per patient Motel 100 per room Nursing Home 100 per bed Office Building 20 per employee Outpatient Surgical Center 50 per patient Picnic Area 5 per visitor School Elementary 15 per pupil School Secondary 25 per pupil School with Dormitory 100 per bed Service Station (Gas Station) 400 per restroom 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